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1. Non-structural carbohydrates mediate seasonal water stress across Amazon forests

Author

Caroline Signori-Müller, Rafael S. Oliveira, Fernanda de Vasconcellos Barros, Julia Valentim Tavares, Martin Gilpin, Francisco Carvalho Diniz, Manuel J. Marca Zevallos, Carlos A. Salas Yupayccana, Martin Acosta, Jean Bacca, Rudi S. Cruz Chino, Gina M. Aramayo Cuellar, Edwin R. M. Cumapa, Franklin Martinez, Flor M. Pérez Mullisaca, Alex Nina, Jesus M. Bañon Sanchez, Leticia Fernandes da Silva, Ligia Tello, José Sanchez Tintaya, Maira T. Martinez Ugarteche, Timothy R. Baker, Paulo R. L. Bittencourt, Laura S. Borma, Mauro Brum, Wendeson Castro, Eurídice N. Honorio Coronado, Eric G. Cosio, Ted R. Feldpausch, Letícia d’Agosto Miguel Fonseca, Emanuel Gloor, Gerardo Flores Llampazo, Yadvinder Malhi, Abel Monteagudo Mendoza, Victor Chama Moscoso, Alejandro Araujo-Murakami, Oliver L. Phillips, Norma Salinas, Marcos Silveira, Joey Talbot, Rodolfo Vasquez, Maurizio Mencuccini, and David Galbraith

Subjects
Science
Abstract

The role of non-structural carbohydrates (NSC) in mediating the impacts of drought in tropical trees is unclear. Here, the authors analyse leaf and branch NSC in 82 Amazon tree species across a Basin-wide precipitation gradient, finding that allocation of leaf NSC to soluble sugars is higher in drier sites and is coupled to tree hydraulic status.

Published
2021
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2. African Savanna-Forest Boundary Dynamics: A 20-Year Study.

Author

Aida Cuni-Sanchez, Lee J T White, Kim Calders, Kathryn J Jeffery, Katharine Abernethy, Andrew Burt, Mathias Disney, Martin Gilpin, Jose L Gomez-Dans, and Simon L Lewis

Subjects
Medicine, Science
Abstract

Recent studies show widespread encroachment of forest into savannas with important consequences for the global carbon cycle and land-atmosphere interactions. However, little research has focused on in situ measurements of the successional sequence of savanna to forest in Africa. Using long-term inventory plots we quantify changes in vegetation structure, above-ground biomass (AGB) and biodiversity of trees ≥10 cm diameter over 20 years for five vegetation types: savanna; colonising forest (F1), monodominant Okoume forest (F2); young Marantaceae forest (F3); and mixed Marantaceae forest (F4) in Lopé National Park, central Gabon, plus novel 3D terrestrial laser scanning (TLS) measurements to assess forest structure differences. Over 20 years no plot changed to a new stage in the putative succession, but F1 forests strongly moved towards the structure, AGB and diversity of F2 forests. Overall, savanna plots showed no detectable change in structure, AGB or diversity using this method, with zero trees ≥10 cm diameter in 1993 and 2013. F1 and F2 forests increased in AGB, mainly as a result of adding recruited stems (F1) and increased Basal Area (F2), whereas F3 and F4 forests did not change substantially in structure, AGB or diversity. Critically, the stability of the F3 stage implies that this stage may be maintained for long periods. Soil carbon was low, and did not show a successional gradient as for AGB and diversity. TLS vertical plant profiles showed distinctive differences amongst the vegetation types, indicating that this technique can improve ecological understanding. We highlight two points: (i) as forest colonises, changes in biodiversity are much slower than changes in forest structure or AGB; and (ii) all forest types store substantial quantities of carbon. Multi-decadal monitoring is likely to be required to assess the speed of transition between vegetation types.

Published
2016
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3. Basin-wide variation in tree hydraulic safety margins predicts the carbon balance of Amazon forests

Author

Julia Valentim Tavares, Rafael S. Oliveira, Maurizio Mencuccini, Caroline Signori-Müller, Luciano Pereira, Francisco Carvalho Diniz, Martin Gilpin, Manuel J. Marca Zevallos, Carlos A. Salas Yupayccana, Martin Acosta, Flor M. Pérez Mullisaca, Fernanda de V. Barros, Paulo Bittencourt, Halina Jancoski, Marina Corrêa Scalon, Beatriz S. Marimon, Imma Oliveras Menor, Ben Hur Marimon, Max Fancourt, Alexander Chambers-Ostler, Adriane Esquivel-Muelbert, Lucy Rowland, Patrick Meir, Antonio Carlos Lola da Costa, Alex Nina, Jesus M. B. Sanchez, Jose S. Tintaya, Rudi S. C. Chino, Jean Baca, Leticia Fernandes, Edwin R. M. Cumapa, João Antônio R. Santos, Renata Teixeira, Ligia Tello, Maira T. M. Ugarteche, Gina A. Cuellar, Franklin Martinez, Alejandro Araujo-Murakami, Everton Almeida, Wesley Jonatar Alves da Cruz, Jhon del Aguila Pasquel, Luís Aragāo, Timothy R. Baker, Plinio Barbosa de Camargo, Roel Brienen, Wendeson Castro, Sabina Cerruto Ribeiro, Fernanda Coelho de Souza, Eric G. Cosio, Nallaret Davila Cardozo, Richarlly da Costa Silva, Mathias Disney, Javier Silva Espejo, Ted R. Feldpausch, Leandro Ferreira, Leandro Giacomin, Niro Higuchi, Marina Hirota, Euridice Honorio, Walter Huaraca Huasco, Simon Lewis, Gerardo Flores Llampazo, Yadvinder Malhi, Abel Monteagudo Mendoza, Paulo Morandi, Victor Chama Moscoso, Robert Muscarella, Deliane Penha, Mayda Cecília Rocha, Gleicy Rodrigues, Ademir R. Ruschel, Norma Salinas, Monique Schlickmann, Marcos Silveira, Joey Talbot, Rodolfo Vásquez, Laura Vedovato, Simone Aparecida Vieira, Oliver L. Phillips, Emanuel Gloor, David R. Galbraith, and University of St Andrews. School of Geography & Sustainable Development

Subjects
MCC, Tropical Climate, Carbon Sequestration, GE, Multidisciplinary, Dehydration, Rain, Climate Change, Xylem/metabolism, 3rd-DAS, Forests, Droughts, Stress, Physiological, SDG 13 - Climate Action, Carbon/metabolism, Biomass, Trees/growth & development, GE Environmental Sciences
Abstract

Funding: Data collection was largely funded by the UK Natural Environment Research Council (NERC) project TREMOR (NE/N004655/1) to D.G., E.G. and O.P., with further funds from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES, finance code 001) to J.V.T. and a University of Leeds Climate Research Bursary Fund to J.V.T. D.G., E.G. and O.P. acknowledge further support from a NERC-funded consortium award (ARBOLES, NE/S011811/1). This paper is an outcome of J.V.T.’s doctoral thesis, which was sponsored by CAPES (GDE 99999.001293/2015-00). J.V.T. was previously supported by the NERC-funded ARBOLES project (NE/S011811/1) and is supported at present by the Swedish Research Council Vetenskapsrådet (grant no. 2019-03758 to R.M.). E.G., O.P. and D.G. acknowledge support from NERC-funded BIORED grant (NE/N012542/1). O.P. acknowledges support from an ERC Advanced Grant and a Royal Society Wolfson Research Merit Award. R.S.O. was supported by a CNPq productivity scholarship, the São Paulo Research Foundation (FAPESP-Microsoft 11/52072-0) and the US Department of Energy, project GoAmazon (FAPESP 2013/50531-2). M.M. acknowledges support from MINECO FUN2FUN (CGL2013-46808-R) and DRESS (CGL2017-89149-C2-1-R). C.S.-M., F.B.V. and P.R.L.B. were financed by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES, finance code 001). C.S.-M. received a scholarship from the Brazilian National Council for Scientific and Technological Development (CNPq 140353/2017-8) and CAPES (science without borders 88881.135316/2016-01). Y.M. acknowledges the Gordon and Betty Moore Foundation and ERC Advanced Investigator Grant (GEM-TRAITS, 321131) for supporting the Global Ecosystems Monitoring (GEM) network (gem.tropicalforests.ox.ac.uk), within which some of the field sites (KEN, TAM and ALP) are nested. The authors thank Brazil–USA Collaborative Research GoAmazon DOE-FAPESP-FAPEAM (FAPESP 2013/50533-5 to L.A.) and National Science Foundation (award DEB-1753973 to L. Alves). They thank Serrapilheira Serra-1709-18983 (to M.H.) and CNPq-PELD/POPA-441443/2016-8 (to L.G.) (P.I. Albertina Lima). They thank all the colleagues and grants mentioned elsewhere [8,36] that established, identified and measured the Amazon forest plots in the RAINFOR network analysed here. The authors particularly thank J. Lyod, S. Almeida, F. Brown, B. Vicenti, N. Silva and L. Alves. This work is an outcome approved Research Project no. 19 from ForestPlots.net, a collaborative initiative developed at the University of Leeds that unites researchers and the monitoring of their permanent plots from the world’s tropical forests [61]. The authros thank A. Levesley, K. Melgaço Ladvocat and G. Pickavance for ForestPlots.net management. They thank Y. Wang and J. Baker, respectively, for their help with the map and with the climatic data. The authors acknowledge the invaluable help of M. Brum for kindly providing the comparison of vulnerability curves based on PAD and on PLC shown in this manuscript. They thank J. Martinez-Vilalta for his comments on an early version of this manuscript. The authors also thank V. Hilares and the Asociación para la Investigación y Desarrollo Integral (AIDER, Puerto Maldonado, Peru); V. Saldaña and Instituto de Investigaciones de la Amazonía Peruana (IIAP) for local field campaign support in Peru; E. Chavez and Noel Kempff Natural History Museum for local field campaign support in Bolivia; ICMBio, INPA/NAPPA/LBA COOMFLONA (Cooperativa mista da Flona Tapajós) and T. I. Bragança-Marituba for the research support. Tropical forests face increasing climate risk1,2, yet our ability to predict their response to climate change is limited by poor understanding of their resistance to water stress. Although xylem embolism resistance thresholds (for example, Ψ50) and hydraulic safety margins (for example, HSM50) are important predictors of drought-induced mortality risk3-5, little is known about how these vary across Earth's largest tropical forest. Here, we present a pan-Amazon, fully standardized hydraulic traits dataset and use it to assess regional variation in drought sensitivity and hydraulic trait ability to predict species distributions and long-term forest biomass accumulation. Parameters Ψ50 and HSM50 vary markedly across the Amazon and are related to average long-term rainfall characteristics. Both Ψ50 and HSM50 influence the biogeographical distribution of Amazon tree species. However, HSM50 was the only significant predictor of observed decadal-scale changes in forest biomass. Old-growth forests with wide HSM50 are gaining more biomass than are low HSM50 forests. We propose that this may be associated with a growth-mortality trade-off whereby trees in forests consisting of fast-growing species take greater hydraulic risks and face greater mortality risk. Moreover, in regions of more pronounced climatic change, we find evidence that forests are losing biomass, suggesting that species in these regions may be operating beyond their hydraulic limits. Continued climate change is likely to further reduce HSM50 in the Amazon6,7, with strong implications for the Amazon carbon sink. Publisher PDF

Published
2023

4. Long‐term drought effects on the thermal sensitivity of Amazon forest trees

Author

Emma M. Docherty, Emanuel Gloor, Daniela Sponchiado, Martin Gilpin, Carlos A. D. Pinto, Haroldo M. Junior, Ingrid Coughlin, Leandro Ferreira, João A. S. Junior, Antonio C. L. da Costa, Patrick Meir, and David Galbraith

Subjects
Physiology, Photosystem II Protein Complex, Plant Science, Trees
Abstract

The continued functioning of tropical forests under climate change depends on their resilience to drought and heat. However, there is little understanding of how tropical forests will respond to combinations of these stresses, and no field studies to date have explicitly evaluated whether sustained drought alters sensitivity to temperature. We measured the temperature response of net photosynthesis, foliar respiration and the maximum quantum efficiency of photosystem II (F

Published
2022

5. Variation of non‐structural carbohydrates across the fast–slow continuum in Amazon Forest canopy trees

Author

Manuel J. Marca Zevallos, Caroline Signori-Müller, Carlos A. Salas Yupayccana, Lucy Rowland, Maurizio Mencuccini, Abel Monteagudo Mendoza, Rodolfo Vasquez, Norma Salinas, Rafael S. Oliveira, Yadvinder Malhi, Alex Nina, Eric G. Cosio, Oliver L. Phillips, Fernanda de V. Barros, David W. Galbraith, Mauro Brum, Timothy R. Baker, Francisco Carvalho Diniz, Martin Gilpin, and Julia Valentim Tavares

Subjects
Canopy, Variation (linguistics), Continuum (measurement), Amazon forest, Biology, Atmospheric sciences, Slow Growing, Ecology, Evolution, Behavior and Systematics
Published
2021

6. The global abundance of tree palms

Author

Ekananda Paudel, Katrin Böhning-Gaese, Erika Berenguer, Edilson J. Requena-Rojas, Xinghui Lu, Luciana F. Alves, Yves Laumonier, Matt Bradford, Keith C. Hamer, Heike Culmsee, Robert M. Ewers, Jan Reitsma, Natacha Nssi Bengone, Anne Mette Lykke, Kuswata Kartawinata, Michael J. Lawes, Géraldine Derroire, Martin Gilpin, Jean-François Bastin, Rodolfo Vásquez Martínez, Laszlo Nagy, José Luís Camargo, Gabriella Fredriksson, Esteban Álvarez-Dávila, Casimiro Mendoza Bautista, Swapan Kumar Sarker, Jhon del Aguila-Pasquel, Ida Theilade, Erny Poedjirahajoe, Bonaventure Sonké, Jefferson S. Hall, Naret Seuaturien, Shin-ichiro Aiba, Simon L. Lewis, Francesco Rovero, Carlos Mariano Alvez-Valles, Donald R. Drake, Agustín Rudas Lleras, Lee J. T. White, Gerardo A.Aymard Corredor, Damien Catchpole, Tariq Stévart, Samuel Almeida, Janet Franklin, Mohammad Shah Hussain, Nicholas J. Berry, Jon C. Lovett, Hirma Ramírez-Angulo, Rafael de Paiva Salomão, Beatriz Schwantes Marimon, Onrizal Onrizal, Ted R. Feldpausch, Wannes Hubau, Ima Célia Guimarães Vieira, Thomas L. P. Couvreur, José Luís Marcelo Peña, Juliana Schietti, Ana Andrade, Anand Roopsind, Javier E. Silva-Espejo, Carlos Alfredo Joly, Fabrício Alvim Carvalho, Connie J. Clark, Kofi Affum-Baffoe, William E. Magnusson, Shengbin Chen, K. Anitha, Ni Putu Diana Mahayani, Flávia R. C. Costa, John R. Poulsen, Faridah Hanum Ibrahim, Aurélie Dourdain, Irie Casimir Zo-Bi, Heriberto David-Higuita, Rahmad Zakaria, Mario Percy Núñez Vargas, Karina Melgaço, Marcelo Trindade Nascimento, Damien Bonal, Murray Collins, Jos Barlow, Emilio Vilanova, Yadvinder Malhi, Andes Hamuraby Rozak, Timothy J. S. Whitfeld, Badru Mugerwa, Terry L. Erwin, John Pipoly, Bruno Hérault, Ervan Rutishauser, Anthony Di Fiore, William F. Laurance, Luzmila Arroyo, Jean-Louis Doucet, Lilian Blanc, Henrik Balslev, Percival Cho, Priya Davidar, Sonia Palacios-Ramos, John Terborgh, Peter M. Umunay, Shijo Joseph, Robert Muscarella, Massiel Corrales Medina, Rueben Nilus, Robert Steinmetz, Everton Cristo de Almeida, Rhett D. Harrison, Thomas E. Lovejoy, Peter S. Ashton, Sophie Fauset, Adriana Prieto, Christelle Gonmadje, Wolf L. Eiserhardt, Andreas Hemp, R. Nazaré O. de Araújo, Markus Fischer, Hoang Van Sam, Ferry Slik, Jianwei Tang, Luiz Menini Neto, Plínio Barbosa de Camargo, Tran Van Do, Hidetoshi Nagamasu, Aisha Sultana, Marc P. E. Parren, Carlos Reynel Rodriguez, Frans Bongers, Campbell O. Webb, Lan Qie, Jean Claude Razafimahaimodison, Justin Kassi, Kanehiro Kitayama, Francis Q. Brearley, Peter van der Hout, Nigel C. A. Pitman, Georgia Pickavance, Jérôme Millet, Joice Ferreira, Zorayda Restrepo Correa, Manichanh Satdichanh, Carlos Gabriel Hidalgo Pizango, Rodrigo Sierra, Oliver L. Phillips, Vianet Mihindou, William Milliken, Walter A. Palacios, Fernando Alzate Guarin, Charles E. Zartman, Abel Monteagudo Mendoza, Arachchige Upali Nimal Gunatilleke, Eddy Nurtjahya, Susan G. Laurance, Marcos Silveira, Janvier Lisingo, Nobuo Imai, Asyraf Mansor, Kenneth R. Young, Serge A. Wich, Ruwan Punchi-Manage, Christine B. Schmitt, Simone Aparecida Vieira, D. Mohandass, Thaise Emilio, Gemma Rutten, Fabian Brambach, Steven W. Brewer, Timothy R. Baker, Carolina V. Castilho, Timothy J. Killeen, Terry Sunderland, Lourens Poorter, Martin van de Bult, Feyera Senbeta, Eileen Larney, Bente B. Klitgård, Phourin Chhang, Hans ter Steege, Runguo Zang, Simon Willcock, Wendeson Castro, María Uriarte, Jean Philippe Puyravaud, Andrew R. Marshall, R. Toby Pennington, Jens-Christian Svenning, Jonathan Timberlake, Eurídice N. Honorio Coronado, Douglas Sheil, Susan K. Wiser, Lila Nath Sharma, Raman Sukumar, Jeanneth Villalobos Cayo, Andy Hector, Luis E.O.C. Aragao, Wanlop Chutipong, David Harris, Carlos A. Quesada, Thomas W. Gillespie, Alejandro Araujo Murakami, Edmund V. J. Tanner, Carlos E. Cerón Martínez, William J. Baker, Corneille E. N. Ewango, Nicolas Labrière, Paulo S. Morandi, Armando Torres-Lezama, David A. Neill, Edward L. Webb, Andreas Ensslin, David Campbell, Khalid Rehman Hakeem, Robert M. Kooyman, Aurora Levesley, Edmar Almeida de Oliveira, James A. Comiskey, Ben Hur Marimon-Junior, Hebbalalu S. Suresh, Ophelia Wang, Leandro Valle Ferreira, Luis Valenzuela Gamarra, Marc K. Steininger, P. Rama Chandra Prasad, Systems Ecology, Robert Muscarella, Uppsala University / Aarhus University, Thomas L. P. Couvreur, University of Montpellier, Luzmila Arroyo, Gabriel René Moreno Autonomous University, Plinio Barbosa de Camargo, CENA-USP, Jos Barlow, Lancaster University, Jean-François Bastin, ETH Zürich, Natacha Nssi Bengone, National Agency of National Parks of Gabon, Erika Berenguer, Lancaster University / University of Oxford, Nicholas Berry, The Landscapes and Livelihoods Group, Lilian Blanc, CIRAD / University of Montpellier, Katrin Böhning-Gaese, Senckenberg Biodiversity and Climate Research Centre / Goethe University, Damien Bonal, Université de Lorraine, Frans Bongers, Wageningen University & Research, Matt Bradford, CSIRO Land and Water, Percival Cho, Forest Department, Connie Clark, Duke University, Murray Collins, University of Edinburgh, James A. Comiskey, National Park Service / Smithsonian Institution, Flávia R. C. Costa, INPA, Géraldine Derroire, CIRAD, Anthony Di Fiore, University of Texas at Austin, Tran Van Do, Vietnamese Academy of Forest Sciences, Jean-Louis Doucet, Liège University, Aurélie Dourdain, CIRAD, Andreas Ensslin, University of Bern, Terry Erwin, Smithsonian Institution, Corneille E. N. Ewango, University of Kisangani, JOICE NUNES FERREIRA, CPATU, David J. Harris, Royal Botanic Garden Edinburgh, Rhett D. Harrison, World Agroforestry, East and Southern Africa Region, Andrew Hector, University of Oxford, Wannes Hubau, University of Leeds / Royal Museum for Central Africa, Mohammad Shah Hussain, University of Delhi, Faridah-Hanum Ibrahim, Universiti Putra Malaysia Bintulu Campus, Nobuo Imai, Tokyo University of Agriculture, Carlos A. Joly, UNICAMP, Shijo Joseph, Kerala University of Fisheries and Ocean Studies, Anitha K, Rainforest Traditions, Kuswata Kartawinata, The Field Museum of Natural History / Indonesian Institute of Sciences, Justin Kassi, Université Félix Houphouët-Boigny, Timothy J. Killeen, Universidad Autonoma Gabriel Rene Moreno, Kanehiro Kitayama, Kyoto University, Bente Bang Klitgård, Royal Botanic Gardens Kew, Michael J. Lawes, University of KwaZulu-Natal, Aurora Levesley, University of Leeds, Janvier Lisingo, Kisangani University, Thomas Lovejoy, George Mason University, Jon C. Lovett, University of Leeds / Royal Botanic Gardens Kew, Xinghui Lu, Liaocheng University, Anne Mette Lykke, Aarhus University, William E. Magnusson, INPA, Casimiro Mendoza Bautista, Universidad Mayor de San Simón, Vianet Mihindou, Agence Nationale des Parcs Nationaux / Ministère de la Forêt et de l’Environnement, Jérôme Millet, French Agency for Biodiversity, William Milliken, Royal Botanic Gardens Kew, D. Mohandass, Novel Research Academy, David A. Neill, Universidad Estatal Amazónica, Luiz Menini Neto, Universidade Federal de Juiz de Fora, Rueben Nilus, Forest Research Centre, Sabah Forestry Department, Mario Percy Núñez Vargas, Universidad Nacional de San Antonio Abad del Cusco, Eddy Nurtja, Universitas Bangka Belitung, R. Nazaré O. de Araújo, INPA, Onrizal Onrizal, Universitas Sumatera Utara, Walter A. Palacios, Herbario Nacional del Ecuador, Universidad Técnica del Norte, Sonia Palacios-Ramos, Universidad Nacional Agraria La Molina, Marc Parren, Wageningen University & Research, Ekananda Paudel, Nepal Academy of Science and Technology, Paulo S. Morandi, Universidade do Estado de Mato Grosso, R. Toby Pennington, Royal Botanic Garden Edinburgh / University of Exeter, Georgia Pickavance, University of Leeds, John J. Pipoly III, Broward County Parks and Recreation Division, Nigel C. A. Pitman, Field Museum, Erny Poedjirahajoe, Universitas Gadjah Mada, Lourens Poorter, Université de Lorraine, AgroParisTech, INRAE, John R. Poulsen, Duke University, P. Rama Chandra Prasad, International Institute of Information Technology, Adriana Prieto, Universidad Nacional de Colombia, Jean-Philippe Puyravaud, Sigur Nature Trust, Lan Qie, University of Lincoln, Carlos A. Quesada, INPA, Hirma Ramírez-Angulo, INDEFOR, Universidad de Los Andes, Ervan Rutishauser, Smithsonian Tropical Research Institute, Gemma Rutten, University of Bern, Ruwan Punchi-Manage, University of Peradeniya, Rafael P. Salomão, MPEG / UFRA, Hoang Van Sam, Vietnam National University of Forestry, Swapan Kumar Sarker, Shahjalal University of Science & Technology, Manichanh Satdichanh, hinese Academy of Sciences / World Agroforestry Centre, Juliana Schietti, INPA, Jianwei Tang, Chinese Academy of Sciences, Edmund Tanner, University of Cambridge, Hans ter Steege, Naturalis Biodiversity Center / Systems Ecology, Jeanneth Villalobos Cayo, Universidad Mayor Real and Pontifical de San Francisco Xavier de Chuquisaca, Ophelia Wang, Northern Arizona University, Campbell O. Webb, University of Alaska, Edward L. Webb, National University of Singapore, Lee White, Agence Nationale des Parcs Nationaux / Institut de Recherche en Ecologie Tropicale / University of Stirling, Timothy J. S. Whitfeld, University of Minnesota, Serge Wich, Liverpool John Moores University / University of Amsterdam, Simon Willcock, Bangor University, Wanlop Chutipong, King Mongut's Institute of Technology Thonburi, Douglas Sheil, Norwegian University of Life Sciences, Rodrigo Sierra, GeoIS, Andreas Hemp, University of Bayreuth, Bruno Herault, CIRAD / Institut National Polytechnique Félix Houphouët-Boigny, Carlos Gabriel Hidalgo Pizango, IIAP, Eurídice N. Honorio Coronado, IIAP, Wolf L. Eiserhardt, Aarhus University / Royal Botanic Gardens Kew, Jens-Christian Svenning, Aarhus University, Kofi Affum-Baffoe, Ghana Forestry Commission, Shin-Ichiro Aiba, Hokkaido University Sapporo, Everton C. de Almeida, UFOPA, Samuel S. de Almeida, MPEG, Edmar Almeida de Oliveira, UFMT, Esteban Álvarez-Dávila, Universidad Nacional Abierta y a Distancia, Luciana F. Alves, University of California, Carlos Mariano Alvez-Valles, Universidad Nacional Mayor de San Marcos, Fabrício Alvim Carvalho, Universidade Federal de Juiz de Fora, Fernando Alzate Guarin, Universidad de Antioquia, Ana Andrade, INPA, Luis E. O. C. Aragão, INPE / University of Exeter, Alejandro Araujo Murakami, Universidad Autonoma Gabriel Rene Moreno, Peter S. Ashton, Harvard University, Gerardo A. Aymard Corredor, Compensation International Progress / UNELLEZ-Guanare, Timothy R. Baker, University of Leeds, Fabian Brambach, University of Goettingen, Francis Q. Brearley, Manchester Metropolitan University, Steven W. Brewer, Wild Earth Allies, Jose L. C. Camargo, INPA, David G. Campbell, Grinnell College, CAROLINA VOLKMER DE CASTILHO, CPAF-RR, Wendeson Castro, SOS Amazônia, Damien Catchpole, University of Tasmania, Carlos E. Cerón Martínez, Universidad Central del Ecuador, Shengbin Chen, Chengdu University of Technology, Phourin Chhang, Forestry Administration, Massiel Nataly Corrales Medina, Universidad Nacional de San Agustín de Arequipa, Heike Culmsee, German Federal Foundation for the Environment, Heriberto David-Higuita, Universidad de Antioquia, Priya Davidar, Sigur Nature Trust, Jhon del Aguila-Pasquel, IIAP, Robert M. Ewers, Imperial College London, Sophie Fauset, University of Plymouth, Ted R. Feldpausch, University of Exeter, Leandro Valle Ferreira, MPEG, Markus Fischer, University of Bern, Janet Franklin, University of California, Gabriella M. Fredriksson, Pro Natura Foundation, Thomas W. Gillespie, University of California, Martin Gilpin, University of Leeds, Christelle Gonmadje, University of Yaoundé / National Herbarium, Arachchige Upali Nimal Gunatilleke, University of Peradeniya, Khalid Rehman Hakeem, King Abdulaziz University, Jefferson S. Hall, Smithsonian Tropical Research Institute, Keith C. Hamer, University of Leeds, Lila Nath Sharma, ForestAction Nepal, Robert Kooyman, Macquarie University / Royal Botanic Gardens, Nicolas Labrière, CNRS, Eileen Larney, TEAM / Zoological Society of London, Yves Laumonier, CIRAD, Susan G. Laurance, James Cook University, William F. Laurance, James Cook University, Ni Putu Diana Mahayani, Universitas Gadjah Mada, Yadvinder Malhi, University of Oxford, Asyraf Mansor, Universiti Sains Malaysia / Universiti Sains Malaysia, Jose Luis Marcelo Peña, Universidad Nacional Agraria La Molina / ESALQ-USP, Ben H. Marimon-Junior, UNEMAT, Andrew R. Marshall, University of the Sunshine Coast / University of York / Flamingo Land, Karina Melgaco, University of Leeds, Abel Lorenzo Monteagudo Mendoza, Universidad Nacional de San Antonio Abad del Cusco, Badru Mugerwa, Mbarara University of Science and Technology, Hidetoshi Nagamasu, Kyoto University, Laszlo Nagy, UNICAMP, Naret Seuaturien, WWF Thailand, Marcelo T. Nascimento, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Jean Claude Razafimahaimodison, University of Fianarantsoa, Jan Meindert Reitsma, Bureau Waardenburg BV, Edilson J. Requena-Rojas, Universidad Continental, Zorayda Restrepo Correa, Ecosystems Services and Climate Change (SECC) Group, COL-TREE Corporatio, Carlos Reynel Rodriguez, Universidad Nacional Agraria La Molina, Anand Roopsind, Boise State University, Francesco Rovero, University of Florence / Museo delle Scienze, Andes Rozak, Indonesian Institute of Sciences (LIPI), Agustín Rudas Lleras, Universidad Nacional de Colombia, Christine B. Schmitt, University of Bonn / University of Freiburg, Beatriz Schwantes Marimon, UNEMAT, Feyera Senbeta, Addis Ababa University, Javier E. Silva-Espejo, Universidad de La Serena, Marcos Silveira, UFAC, Bonaventure Sonké, University of Yaoundé, Robert Steinmetz, WWF Thailand, Tariq Stévart, Missouri Botanical Garden, Raman Sukumar, Indian Institute of Science, Aisha Sultana, University of Delhi, Terry C. H. Sunderland, University of British Columbia / CIFOR, Hebbalalu Satyanarayana Suresh, Indian Institute of Science, John W. Terborgh, University of Florida / James Cook University, Ida Theilade, University of Copenhagen, Jonathan Timberlake, Warren Lane, Armando Torres-Lezama, Universidad de Los Andes, Peter Umunay, Yale University, María Uriarte, Columbia University, Luis Valenzuela Gamarra, Jardín Botánico de Missouri, Martin van de Bult, Doi Tung Development Project, Social Development Department, Peter van der Hout, Van der Hout Förestry Consulting, Rodolfo Vasquez Martinez, Herbario Selva Central Oxapampa, Ima Célia Guimarães Vieira, MPEG, Simone A. Vieira, UNICAMP, Emilio Vilanova, University of California, Susan K. Wiser, Manaaki Whenua, Landcare Research, Kenneth R. Young, University of Texas at Austin, Rahmad Zakaria, Universiti Sains Malaysia, Runguo Zang, Chinese Academy of Forestry, Charles E. Zartman, INPA, Irié Casimir Zo-Bi, Institut National Polytechnique Félix Houphouët-Boigny, Henrik Balslev, Aarhus University., Donald R. Drake, University of Hawai'i at M?noa, Marc K. Steininger, University of Maryland, Thaise Emilio, UNICAMP / Royal Botanic Gardens Kew, Oliver L. Phillips, University of Leeds, Simon L. Lewis, University of Leeds / University College London, Ferry Slik, Universiti Brunei Darussalam, William J. Baker, Royal Botanic Gardens Kew, Uppsala University, SILVA (SILVA), AgroParisTech-Université de Lorraine (UL)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and Rainforest Research Sdn Bhd

Subjects
0106 biological sciences, DIVERSITY, Biomasa, Biomassa, Arecaceae, AFRICAN, 580 Plants (Botany), 01 natural sciences, BIOMASS, purl.org/pe-repo/ocde/ford#4.01.02 [http], biomasse aérienne des arbres, Abundance (ecology), CARBON STORAGE, Floresta Tropical, Densité, Silvicultura, Biomass, Forêt tropicale humide, ALLOMETRY, above-ground biomass, Global and Planetary Change, Biomass (ecology), GE, Condições abióticas locais, biology, Ecology, Inventaire forestier, abundance patterns, tropical, Facteur du milieu, wood density, PE&RC, Geography, Physical, 0501 Ecological Applications, Geography, Biogeografia, Physical Sciences, [SDE]Environmental Sciences, Biodiversité, C180 Ecology, 0406 Physical Geography and Environmental Geoscience, Variance génétique, Life Sciences & Biomedicine, pantropical biogeography, Neotropics, F40 - Écologie végétale, Zona tropical, Biogéographie, Environmental Sciences & Ecology, Subtropics, 010603 evolutionary biology, Bois, local abiotic conditions, Bosecologie en Bosbeheer, Ecosystem, Relative species abundance, Ecology, Evolution, Behavior and Systematics, Densidade da Madeira, Ekologi, Science & Technology, 0602 Ecology, 010604 marine biology & hydrobiology, QK, Diameter at breast height, Biology and Life Sciences, facteurs abiotiques, DIVERSIFICATION HISTORY, 15. Life on land, biology.organism_classification, EVOLUTION, Forest Ecology and Forest Management, AMAZONIAN FOREST, Physical Geography, 13. Climate action, Earth and Environmental Sciences, PATTERNS, tropical rainforest, Tropical rainforest
Abstract

Aim Palms are an iconic, diverse and often abundant component of tropical ecosystems that provide many ecosystem services. Being monocots, tree palms are evolutionarily, morphologically and physiologically distinct from other trees, and these differences have important consequences for ecosystem services (e.g., carbon sequestration and storage) and in terms of responses to climate change. We quantified global patterns of tree palm relative abundance to help improve understanding of tropical forests and reduce uncertainty about these ecosystems under climate change. Location Tropical and subtropical moist forests. Time period Current. Major taxa studied Palms (Arecaceae). Methods We assembled a pantropical dataset of 2,548 forest plots (covering 1,191ha) and quantified tree palm (i.e., ≥10cm diameter at breast height) abundance relative to co‐occurring non‐palm trees. We compared the relative abundance of tree palms across biogeographical realms and tested for associations with palaeoclimate stability, current climate, edaphic conditions and metrics of forest structure. Results On average, the relative abundance of tree palms was more than five times larger between Neotropical locations and other biogeographical realms. Tree palms were absent in most locations outside the Neotropics but present in >80% of Neotropical locations. The relative abundance of tree palms was more strongly associated with local conditions (e.g., higher mean annual precipitation, lower soil fertility, shallower water table and lower plot mean wood density) than metrics of long‐term climate stability. Life‐form diversity also influenced the patterns; palm assemblages outside the Neotropics comprise many non‐tree (e.g., climbing) palms. Finally, we show that tree palms can influence estimates of above‐ground biomass, but the magnitude and direction of the effect require additional work. Conclusions Tree palms are not only quintessentially tropical, but they are also overwhelmingly Neotropical. Future work to understand the contributions of tree palms to biomass estimates and carbon cycling will be particularly crucial in Neotropical forests.

Published
2020

7. Non-structural carbohydrates mediate seasonal water stress across Amazon forests

Author

Martin Acosta, Timothy R. Baker, José Sanchez Tintaya, Ligia Tello, Eric G. Cosio, David W. Galbraith, Carlos A. Salas Yupayccana, Letícia Fernandes da Silva, Emanuel Gloor, Gina M Aramayo Cuellar, Mauro Brum, Rudi S Cruz Chino, Edwin R M Cumapa, Eurídice N. Honorio Coronado, Letícia d’Agosto Miguel Fonseca, Marcos Silveira, Jesus M Bañon Sanchez, Rodolfo Vasquez, Norma Salinas, Joey Talbot, Alex Nina, Paulo R. L. Bittencourt, Maira T Martinez Ugarteche, Oliver L. Phillips, Francisco Carvalho Diniz, Manuel J. Marca Zevallos, Jean Bacca, Ted R. Feldpausch, Martin Gilpin, Rafael S. Oliveira, Laura S. Borma, Julia Valentim Tavares, Victor Chama Moscoso, Gerardo Flores Llampazo, Wendeson Castro, Yadvinder Malhi, Fernanda de V. Barros, Caroline Signori-Müller, Maurizio Mencuccini, Franklin Martinez, Abel Monteagudo Mendoza, Flor Maria Perez Mullisaca, Alejandro Araujo-Murakami, and University of St Andrews. School of Geography & Sustainable Development

Subjects
0106 biological sciences, 010504 meteorology & atmospheric sciences, QH301 Biology, Ecophysiology, General Physics and Astronomy, Forests, 01 natural sciences, Trees, Tropical climate, Dry season, Peru, SDG 13 - Climate Action, reproductive and urinary physiology, Multidisciplinary, Geography, Amazon rainforest, food and beverages, Tropical ecology, Droughts, Carbohydrate Metabolism, Seasons, Brazil, Wet season, Bolivia, Science, Climate Change, Carbohydrates, Climate change, General Biochemistry, Genetics and Molecular Biology, Article, QH301, Precipitation, Sugar, 0105 earth and related environmental sciences, Tree canopy, Tropical Climate, fungi, Water, DAS, General Chemistry, nervous system diseases, Plant Leaves, Natural variation in plants, nervous system, Agronomy, Plant stress responses, Forest ecology, Sugars, 010606 plant biology & botany
Abstract

Non-structural carbohydrates (NSC) are major substrates for plant metabolism and have been implicated in mediating drought-induced tree mortality. Despite their significance, NSC dynamics in tropical forests remain little studied. We present leaf and branch NSC data for 82 Amazon canopy tree species in six sites spanning a broad precipitation gradient. During the wet season, total NSC (NSCT) concentrations in both organs were remarkably similar across communities. However, NSCT and its soluble sugar (SS) and starch components varied much more across sites during the dry season. Notably, the proportion of leaf NSCT in the form of SS (SS:NSCT) increased greatly in the dry season in almost all species in the driest sites, implying an important role of SS in mediating water stress in these sites. This adjustment of leaf NSC balance was not observed in tree species less-adapted to water deficit, even under exceptionally dry conditions. Thus, leaf carbon metabolism may help to explain floristic sorting across water availability gradients in Amazonia and enable better prediction of forest responses to future climate change., The role of non-structural carbohydrates (NSC) in mediating the impacts of drought in tropical trees is unclear. Here, the authors analyse leaf and branch NSC in 82 Amazon tree species across a Basin-wide precipitation gradient, finding that allocation of leaf NSC to soluble sugars is higher in drier sites and is coupled to tree hydraulic status.

Published
2020

8. Long-term thermal sensitivity of Earth's tropical forests

Author

Bruno Herault, Peter J. Van Der Meer, Jean-François Bastin, Aurora Levesley, Michael D. Swaine, Rodolfo Vásquez Martínez, Martin Dančák, Matt Bradford, Frans Bongers, Stuart J. Davies, Reuben Nilus, Adriano José Nogueira Lima, Lip Khoon Kho, Edmar Almeida de Oliveira, Joey Talbot, Richard F. Preziosi, Jagoba Malumbres-Olarte, James A. Comiskey, Thalès de Haulleville, José Luís Camargo, Terese B. Hart, Juliana Schietti, Peter S. Ashton, Thomas E. Lovejoy, Ophelia Wang, Kanehiro Kitayama, Francis Q. Brearley, Peter van der Hout, Amy C. Bennett, Janvier Lisingo, Luis Valenzuela Gamarra, Lily Rodriguez Bayona, Zorayda Restrepo Correa, Jérôme Chave, Connie J. Clark, Christopher Baraloto, Gerardo Aymard, Serge K. Begne, Kofi Affum-Baffoe, Abel Monteagudo-Mendoza, Geertje M. F. van der Heijden, Fernanda Coelho de Souza, Timothy R. Baker, Rahayu Sukmaria Sukri, Julie Peacock, Hermann Taedoumg, Simon L. Lewis, Yahn Carlos Soto Shareva, Greta C. Dargie, Murielle Simo-Droissart, David Harris, Faizah Metali, Hans ter Steege, Richard Lowe, Géraldine Derroire, Benoit Burban, Camila Silva Valeria, Martin Svátek, Wannes Hubau, Sarah A. Batterman, Vincent A. Vos, Elizabeth Kearsley, Peter M. Umunay, Martin J. P. Sullivan, Flávia R. C. Costa, Hans Verbeeck, Maria Cristina Peñuela Mora, John R. Poulsen, Simon Willcock, Simone Aparecida Vieira, Jean-Louis Doucet, Foster Brown, Yadvinder Malhi, Luisa Fernanda Duque, Ronald Vernimmen, Miguel E. Leal, Alan Hamilton, Martin Gilpin, Colin R. Maycock, Carlos Cerón, Radim Hédl, Oliver L. Phillips, Walter Huaraca Huasco, Jon C. Lovett, Beatriz Schwantes Marimon, Roderick Zagt, Ted R. Feldpausch, Gabriela Lopez-Gonzalez, Ima Célia Guimarães Vieira, Pascal Boeckx, Roel J. W. Brienen, Marcelo F. Simon, Keith C. Hamer, Alberto Vicentini, Corneille E. N. Ewango, Clément Stahl, Javier Silva Espejo, Ana Andrade, Anand Roopsind, Erika Berenguer, Pieter A. Zuidema, Vianet Mihindou, Murray Collins, Simone Matias Reis, Emilio Vilanova Torre, Kathryn J. Jeffery, Marie Noël Kamdem Djuikouo, Terry Brncic, Percy Núñez Vargas, John Terborgh, Paulo S. Morandi, Bonaventure Sonké, Jan Bogaert, William E. Magnusson, Lilian Blanc, Terry L. Erwin, Ervan Rutishauser, Anthony Di Fiore, Isau Huamantupa-Chuquimaco, Edward T. A. Mitchard, Massiel Corrales Medina, Nicholas J. Berry, Juliana Stropp, Maureen Playfair, Luzmila Arroyo, Douglas Sheil, Armando Torres-Lezama, David A. Neill, Sean C. Thomas, Eric Arets, Ernest G. Foli, Lola da Costa, Ricardo Keichi Umetsu, Lan Qie, James Singh, Lise Zemagho, Agustín Rudas, Richard B. Primack, Jan Reitsma, Annette Hladik, Alexander K. Koch, Colin A. Pendry, Walter A. Palacios, Sabina Cerruto Ribeiro, Nicolas Labrière, Fernando Elias, Eric Chezeaux, William Milliken, Manuel Gloor, Romeo Ekoungoulou, Jefferson S. Hall, Henrique E. M. Nascimento, Susan G. Laurance, Axel Dalberg Poulsen, Marcos Silveira, Carolina V. Castilho, Plínio Barbosa de Camargo, Eurídice N. Honorio Coronado, Kamariah Abu Salim, Joeri A. Zwerts, Marcelo Brilhante de Medeiros, Jos Barlow, Georgia Pickavance, Joice Ferreira, Mark van Nieuwstadt, Jorcely Barroso, Andrew R. Marshall, Miguel Alexiades, Lindsay F. Banin, Terry Sunderland, Lourens Poorter, Alejandro Araujo-Murakami, Varun Swamy, Rafael Herrera, Hans Beeckman, Gerardo Flores Llampazo, Shin-ichiro Aiba, Adriane Esquivel-Muelbert, Michelle Kalamandeen, Adriana Prieto, Ben Hur Marimon, Casimiro Mendoza, Victor Chama Moscoso, Eliana Jimenez-Rojas, Hirma Ramírez-Angulo, Maxime Réjou-Méchain, Vincent Droissart, Nigel C. A. Pitman, Hannah L. Mossman, Everton Cristo de Almeida, Fernando Cornejo Valverde, Ângelo Gilberto Manzatto, Aurélie Dourdain, Luiz E. O. C. Aragão, Raquel Thomas, David W. Galbraith, Kenneth R. Young, Nallaret Davila Cardozo, Timothy J. Killeen, Rafael de Paiva Salomão, Bente B. Klitgaard, James Taplin, Damien Bonal, Karina Melgaço, William F. Laurance, Jason Vleminckx, Esteban Alvarez Dávila, Verginia Wortel, Richarlly da Costa Silva, Thaiane Rodrigues de Sousa, Sophie Fauset, Nadir Pallqui Camacho, Wendeson Castro, Toby R. Marthews, Fabricio Beggiato Baccaro, John T. Woods, David Taylor, Patricia Alvarez Loayza, Andrew Ford, Niro Higuchi, Aida Cuni Sanchez, Aline Pontes Lopes, Laszlo Nagy, John Pipoly, Lee J. T. White, Jhon del Aguila Pasquel, European Research Council, European Commission, Royal Society (UK), Leverhulme Trust, Gordon and Betty Moore Foundation, David and Lucile Packard Foundation, Fundação de Amparo à Pesquisa do Estado de São Paulo, Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Agence Nationale de la Recherche (France), Missouri Botanical Garden, Smithsonian Institution, Wildlife Conservation Society, National Geographic Society, Centre for International Forestry Research, Agence Nationale Des Parcs Nationaux (Gabon), University of Leeds, Mensurat Unit, Forestry Research Institute of Ghana, Centro de Pesquisa Agroflorestal de Roraima, Brazilian Agricultural Research Corporation (Embrapa), Sch Geog, University of Nottingham, Department of Biology, Higher Teachers Training College (HTTC), Université deYaoundé I, School of Geography [Leeds], University of Edinburgh, School of Geography and the Environment, Environmental Change Institute, University of Oxford [Oxford], Grad Sch Sci & Engn, Kagoshima University, University of Kent [Canterbury], Universidade Federal do Mato Grosso (UFMT), Universidad Nacional de Colombia, Duke University [Durham], Instituto Nacional de Pesquisas da Amazônia (INPA), University of Campinas [Campinas] (UNICAMP), National Institute for Space Research [Sao José dos Campos] (INPE), Universidad Autonoma Gabriel René Moreno (UAGRM), Wageningen University and Research [Wageningen] (WUR), Dept Organism & Evolutionary Biol, Harvard University [Cambridge], Ecologie des forêts de Guyane (ECOFOG), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université des Antilles et de la Guyane (UAG)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS), Universidade de São Paulo (USP), Universidade Federal do Acre (UFAC), Research Unit of Landscape Ecology and Plant Production Systems, Université libre de Bruxelles (ULB), School of Engineering and Science, Jacobs University [Bremen], Lancaster Environment Centre, Lancaster University, Sch Geosci, Laboratory of Applied Physical Chemistry, Universiteit Gent = Ghent University [Belgium] (UGENT), Biodiversité et Paysage, Université de Liège - Gembloux, Ecologie et Ecophysiologie Forestières [devient SILVA en 2018] (EEF), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL), Forest Ecol & Forest Management Grp, CSIRO Land and Water, Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), Woods Hole Research Center, Partenaires INRAE, Herbario Alfredo Paredes, Universidad Agraria del Ecuador, Universidad Nacional de San Antonio Abad del Cusco (UNSAAC), Evolution et Diversité Biologique (EDB), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Rougier Gabon, Andes to Amazon Biodiversity Program, Federal University of Para - Universidade Federal do Para [Belem - Brésil], Smithsonian Tropical Research Institute, Universidad Nacional de la Amazonía Peruana [Loreto, Perou] (UNAP), AgroParisTech, University of Texas at Austin [Austin], Université de Liège, Ecologie des forêts de Guyane (UMR ECOFOG), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-AgroParisTech-Université de Guyane (UG)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire des Milieux Désordonnés et Hétérogènes (LMDH), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Commonwealth Scientific & Industrial Research Organisation (CSIRO), Royal Botanic Gardens, Czech Academy of Sciences [Prague] (CAS), Commissariat général du Plan (CGP), Premier ministre, Instituto Nacional de Pequisas da Amazônia, Instituto National de Pequisas da Amazonia Brazil, Éco-Anthropologie (EAE), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Agence Nationale des Parcs Nationaux, Agence Nationale des Parcs Nationaux, BP 30 379 Libreville, Gabon, Malaysian Palm Oil Board, Kyoto University, Institute of Inorganic and Analytical Chemistry, Friedrich-Schiller-Universität = Friedrich Schiller University Jena [Jena, Germany], James Cook University (JCU), Laboratoire d'Etude de l'Apprentissage et du Développement [Dijon] (LEAD), Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB), Coordenac Bao de Pesquisas em Ecologia, Universidade do Estado de Mato Grosso (UNEMAT), University of Mary Washington, Chercheur indépendant, Royal Botanic Garden , Kew, Department of Biochemistry and Molecular Biology, Medical and Health Science Center, Instituto Superior Técnico, Universidade Técnica de Lisboa (IST), Universidad Estatal Amazonica, Forest Research Centre (FRC), Forest Ecology and Forest Management Group, Natural History Museum [Oslo], University of Oslo (UiO), Bur Waarderburg, Iwokrama International Centre for Rainforest Conservation and Development, CarboForExpert, Museu Paraense Emílio Goeldi [Belém, Brésil] (MPEG), Center for International Forestry Research (CIFOR), Consultative Group on International Agricultural Research [CGIAR] (CGIAR), University of Yaoundé [Cameroun], JRC Institute for Environment and Sustainability (IES), European Commission - Joint Research Centre [Ispra] (JRC), Institute of Biological and Environmental Sciences, School of Biological Sciences, University of Aberdeen, Plant Systemat & Ecol Lab, Université de Yaoundé I, Department of Neurology, Great Ormond Street Hospital for Children [London] (GOSH), Naturalis Biodiversity Center [Leiden], Division of Marine Science and Conservation, Nicholas School of the Environment, Instituto de Investigaciones para el Desarrollo Forestal, Universidad de los Andes [Bogota] (UNIANDES), University of Wisconsin - Milwaukee, Van der Hout Forestry Consulting, University Medical Center Groningen [Groningen] (UMCG), Computational & Applied Vegetation Ecology (CAVElab), Department of Integrative Biology [Berkeley] (IB), University of California [Berkeley], University of California-University of California, Sch Earth Sci & Environm Sustainabil, Northern Arizona University [Flagstaff], University of Stirling, Biol Sci, Liverpool John Moore University (ljmu), Biodiversity Department, Center for Agricultural Research in Suriname (CELOS), Sub Ecology and Biodiversity, Sub Animal Ecology, Ecology and Biodiversity, Animal Ecology, and Systems Ecology

Subjects
0106 biological sciences, Tropical trees, Hot Temperature, 010504 meteorology & atmospheric sciences, Earth, Planet, Climate, Acclimatization, Tropical forest carbon stocks, Bos- en Landschapsecologie, Growth, Forests, Atmospheric sciences, [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy, 01 natural sciences, Trees, Tropical climate, SDG 13 - Climate Action, Forest and Landscape Ecology, Biomass, Photosynthesis, Hectare, Productivity, Biomass (ecology), Multidisciplinary, [SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics, PE&RC, Wood, Productivity (ecology), Vegetatie, Bos- en Landschapsecologie, C180 Ecology, Tree, Leaf Respiration, Carbon-Cycle Feedbacks, Climate Change, Climate change and forestry, Climate change, 010603 evolutionary biology, Carbon cycle, Carbon Cycle, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, Life Science, Bosecologie en Bosbeheer, Vegetatie, 0105 earth and related environmental sciences, Tropical Climate, Vegetation, Global warming, Tropics, 15. Life on land, Forest Ecology and Forest Management, Carbon, CO₂ Fertilization, 13. Climate action, Environmental science, Vegetation, Forest and Landscape Ecology, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Acclimation
Abstract

The sensitivity of tropical forest carbon to climate is a key uncertainty in predicting global climate change. Although short-term drying and warming are known to affect forests, it is unknown if such effects translate into long-term responses. Here, we analyze 590 permanent plots measured across the tropics to derive the equilibrium climate controls on forest carbon. Maximum temperature is the most important predictor of aboveground biomass (-9.1 megagrams of carbon per hectare per degree Celsius), primarily by reducing woody productivity, and has a greater impact per °C in the hottest forests (>32.2°C). Our results nevertheless reveal greater thermal resilience than observations of short-term variation imply. To realize the long-term climate adaptation potential of tropical forests requires both protecting them and stabilizing Earth's climate., Our plot monitoring networks havebeen supported by multiple grants from a large number of funding bodies: European Research Council; Natural Environment Research Council; European Union’s Fifth, Sixth, and Seventh Framework Programme; Royal Society, Leverhulme Trust; Gordon and Betty Moore Foundation; David and Lucile Packard Foundation; State of São Paulo Research Foundation (FAPESP); National Council for Science and Technology Development of Brazil (CNPq); Agence Nationale de la Recherche; Conservation International; Missouri Botanical Garden; Smithsonian Institution; Wildlife Conservation Society; National Geographic Society; Centre for International Forestry; and Gabon’s National Park Agency.

Published
2020

9. Evolutionary diversity is associated with wood productivity in Amazonian forests

Author

Roderick Zagt, Gerardo A. Aymard C, Jorcely Barroso, Kyle G. Dexter, Eliana Jimenez-Rojas, Luis E.O.C. Aragao, Antonio Carlos Lola da Costa, Rafael Herrera, José Luís Camargo, Adriana Prieto, Nigel C. A. Pitman, Martin J. P. Sullivan, David W. Galbraith, Simone Aparecida Vieira, Fernando Cornejo-Valverde, Thomas E. Lovejoy, Ima Célia-Vieira, Fernanda Coelho de Souza, Gabriela Lopez-Gonzalez, Timothy J. Killeen, Rafael de Paiva Salomão, Ricardo Keichi Umetsu, Freddy Ramirez, Hans ter Steege, Esteban Álvarez-Dávila, Jérôme Chave, Timothy R. Baker, Natalino Silva, Olaf Bánki, Susan G. Laurance, Marcos Silveira, Plínio Barbosa de Camargo, R. Toby Pennington, Georgia Pickavance, Maria Cristina Peñuela Mora, Ana Andrade, René G. A. Boot, Anand Roopsind, Eurídice N. Honorio Coronado, Raquel Thomas-Caesar, Casimiro Mendoza, James A. Comiskey, Ben Hur Marimon-Junior, Percy Núñez Vargas, John Pipoly, John Terborgh, Yadvinder Malhi, Rodolfo Vasquez, William F. Laurance, Átila Alves, David A. Neill, Eric Arets, Alejandro Araujo-Murakami, Martin Gilpin, Wendeson Castro, Agustín Rudas, Emanuel Gloor, Abel Monteagudo-Mendoza, Juliana Stropp, Ted R. Feldpausch, Lourens Poorter, Anthony Di Fiore, Beatriz Schwantes Marimon, Rosa C. Goodman, Danilo M. Neves, Foster Brown, Niro Higuchi, Oliver L. Phillips, Vincent A. Vos, James Singh, Álvaro Cogollo, Roel J. W. Brienen, Christopher Baraloto, Iêda Leão do Amaral, L. Arroyo, Chercheur indépendant, Ecology and Global Change, School of Geography, University of Leeds, Royal Botanic Gardens Kew, Projeto TEAM-Manaus, Instituto Nacional de Pesquisas da Amazônia (INPA), Physiologie, Environnement et Génétique pour l'Animal et les Systèmes d'Elevage [Rennes] (PEGASE), AGROCAMPUS OUEST-Institut National de la Recherche Agronomique (INRA), Universidad Autonoma Gabriel René Moreno (UAGRM), Wageningen University and Research Centre [Wageningen] (WUR), Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam [Amsterdam] (UvA), Department of Biology, University of Michigan [Ann Arbor], University of Michigan System-University of Michigan System, Universidade Federal do Acre (UFAC), Tropenbos International (TBI), Sch Geog, University of Nottingham, Universidad Nacional San Antonio Abad del Cusco, Evolution et Diversité Biologique (EDB), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Jardín Botánico de Medellín, University of Texas at Austin [Austin], University of Edinburgh, Instituto Venezolano de Investigaciones Cientificas (IVIC), Dept Environm Sci & Policy, George Mason University, School of Geography and the Environment, Environmental Change Institute, University of Oxford [Oxford], Missouri Botanical Garden (USA), Universidad Estatal Amazonica, Duke University [Durham], Universidad Nacional de Colombia, Iwokrama International Centre for Rainforest Conservation and Development, Museu Paraense Emílio Goeldi, JRC Institute for Environment and Sustainability (IES), European Commission - Joint Research Centre [Ispra] (JRC), Naturalis Biodiversity Center, Division of Marine Science and Conservation, Nicholas School of the Environment, Royal Botanic Gardens, Kew, Wageningen University and Research [Wageningen] (WUR), Universidad Nacional de San Antonio Abad del Cusco (UNSAAC), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Missouri Botanical Garden, Museu Paraense Emílio Goeldi [Belém, Brésil] (MPEG), Naturalis Biodiversity Center [Leiden], and Systems Ecology

Subjects
0106 biological sciences, Bos- en Landschapsecologie, Biodiversity, Forests, Biology, 010603 evolutionary biology, 01 natural sciences, Produccion, 03 medical and health sciences, Amazonía, Life Science, Ecosystem, Forest and Landscape Ecology, Bosecologie en Bosbeheer, Phylogeny, Ecology, Evolution, Behavior and Systematics, ComputingMilieux_MISCELLANEOUS, Vegetatie, 030304 developmental biology, SDG 15 - Life on Land, Diversidad, Tropical Climate, 0303 health sciences, Biomass (ecology), Vegetation, Ecology, technology, industry, and agriculture, Species diversity, Edaphic, 15. Life on land, respiratory system, PE&RC, Bosque, Wood, Forest Ecology and Forest Management, Madera, Phylogenetic diversity, Productivity (ecology), [SDE]Environmental Sciences, Vegetatie, Bos- en Landschapsecologie, Species richness, Vegetation, Forest and Landscape Ecology, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, human activities
Abstract

Higher levels of taxonomic and evolutionary diversity are expected to maximize ecosystem function, yet their relative importance in driving variation in ecosystem function at large scales in diverse forests is unknown. Using 90 inventory plots across intact, lowland, terra firme, Amazonian forests and a new phylogeny including 526 angiosperm genera, we investigated the association between taxonomic and evolutionary metrics of diversity and two key measures of ecosystem function: aboveground wood productivity and biomass storage. While taxonomic and phylogenetic diversity were not important predictors of variation in biomass, both emerged as independent predictors of wood productivity. Amazon forests that contain greater evolutionary diversity and a higher proportion of rare species have higher productivity. While climatic and edaphic variables are together the strongest predictors of productivity, our results show that the evolutionary diversity of tree species in diverse forest stands also influences productivity. As our models accounted for wood density and tree size, they also suggest that additional, unstudied, evolutionarily correlated traits have significant effects on ecosystem function in tropical forests. Overall, our pan-Amazonian analysis shows that greater phylogenetic diversity translates into higher levels of ecosystem function: tropical forest communities with more distantly related taxa have greater wood productivity.

Published
2019

10. Asynchronous carbon sink saturation in African and Amazonian tropical forests

Author

Gabriela Lopez-Gonzalez, David A. Coomes, Connie J. Clark, Hannsjörg Wöll, Douglas Sheil, Kofi Affum-Baffoe, Geertje M. F. van der Heijden, Katharine Abernethy, Hans Verbeeck, John Tshibamba Mukendi, Ted R. Feldpausch, Terese B. Hart, Sam Moore, Robert Bitariho, Francesco Rovero, Joey Talbot, Lise Zemagho, C. Amani, Jefferson S. Hall, Sean C. Thomas, Amy C. Bennett, Pascal Boeckx, Aida Cuni-Sanchez, Armandu K. Daniels, Fabrice Bénédet, Yadvinder Malhi, Alusine Fofanah, John R. Poulsen, David Kenfack, Lindsay F. Banin, Janvier Lisingo, Hans Beeckman, Jean-Louis Doucet, Eric Chezeaux, Emanuel Gloor, Mireille Breuer-Ndoundou Hockemba, Timothy R. Baker, Jan Reitsma, Vincent P. Medjibe, Christelle Gonmadje, Axel Dalberg Poulsen, Marie Noel Djuikouo Kamdem, Fidèle Baya, Serge K. Begne, Patrick Boundja, Adriane Esquivel-Muelbert, Lucas Ojo, Roel J. W. Brienen, Hermann Taedoumg, Natacha Nssi Bengone, Benjamin Toirambe, Lan Qie, Jon C. Lovett, Greta C. Dargie, Elizabeth Kearsley, Darlington Tuagben, George B. Chuyong, Sylvie Gourlet-Fleury, Fidèle Evouna Ondo, Terry Brncic, Pantaleo K. T. Munishi, Martin J. P. Sullivan, Tommaso Jucker, Simon Willcock, Yannick Enock Bocko, Emanuel H. Martin, Vianet Mihindou, Kelvin S.-H. Peh, Kathryn J. Jeffery, Simon L. Lewis, Emmanuel Kasongo Yakusu, Jean-Remy Makana, Andrew R. Marshall, Martin Gilpin, Bonaventure Sonké, Jeremy A. Lindsell, Faustin M. Mbayu, Corneille E. N. Ewango, Wannes Hubau, Suspense Averti Ifo, Peter M. Umunay, Duncan W. Thomas, Edward T. A. Mitchard, Ernest G. Foli, Lee J. T. White, Jaccques M. Mukinzi, Georgia Pickavance, James Taplin, Terry Sunderland, Annette Hladik, Stephen Adu-Bredu, Jason Vleminckx, Oliver L. Phillips, Sophie Fauset, Alexander K. Koch, David Harris, Miguel E. Leal, Alan Hamilton, Aurora Levesley, Michael D. Swaine, James A. Comiskey, Thalès de Haulleville, John T. Woods, David Taylor, Jim Martin, and Murray Collins

Subjects
0106 biological sciences, Carbon Sequestration, 010504 meteorology & atmospheric sciences, Rainforest, Carbon sequestration, Forests, Atmospheric sciences, 010603 evolutionary biology, 01 natural sciences, History, 21st Century, Sink (geography), Trees, chemistry.chemical_compound, Forest ecology, Tropical climate, Life Science, Biomass, 0105 earth and related environmental sciences, Carbon dioxide in Earth's atmosphere, geography, Tropical Climate, Multidisciplinary, geography.geographical_feature_category, Atmosphere, Temperature, Carbon sink, Carbon Dioxide, History, 20th Century, Models, Theoretical, Droughts, chemistry, Carbon dioxide, Africa, Environmental science, C180 Ecology, Brazil
Abstract

Structurally intact tropical forests sequestered about half of the global terrestrial carbon uptake over the 1990s and early 2000s, removing about 15 per cent of anthropogenic carbon dioxide emissions1,2,3. Climate-driven vegetation models typically predict that this tropical forest ‘carbon sink’ will continue for decades4,5. Here we assess trends in the carbon sink using 244 structurally intact African tropical forests spanning 11 countries, compare them with 321 published plots from Amazonia and investigate the underlying drivers of the trends. The carbon sink in live aboveground biomass in intact African tropical forests has been stable for the three decades to 2015, at 0.66 tonnes of carbon per hectare per year (95 per cent confidence interval 0.53–0.79), in contrast to the long-term decline in Amazonian forests6. Therefore the carbon sink responses of Earth’s two largest expanses of tropical forest have diverged. The difference is largely driven by carbon losses from tree mortality, with no detectable multi-decadal trend in Africa and a long-term increase in Amazonia. Both continents show increasing tree growth, consistent with the expected net effect of rising atmospheric carbon dioxide and air temperature7,8,9. Despite the past stability of the African carbon sink, our most intensively monitored plots suggest a post-2010 increase in carbon losses, delayed compared to Amazonia, indicating asynchronous carbon sink saturation on the two continents. A statistical model including carbon dioxide, temperature, drought and forest dynamics accounts for the observed trends and indicates a long-term future decline in the African sink, whereas the Amazonian sink continues to weaken rapidly. Overall, the uptake of carbon into Earth’s intact tropical forests peaked in the 1990s. Given that the global terrestrial carbon sink is increasing in size, independent observations indicating greater recent carbon uptake into the Northern Hemisphere landmass10 reinforce our conclusion that the intact tropical forest carbon sink has already peaked. This saturation and ongoing decline of the tropical forest carbon sink has consequences for policies intended to stabilize Earth’s climate.

Published
2019

11. The persistence of carbon in the African forest understory

Author

Benjamin Toirambe, Emmanuel Kasongo Yakusu, John Tshibamba Mukendi, Timothy R. Baker, Jan Van den Bulcke, Jean-Louis Doucet, Georgia Pickavance, Sofie Dierickx, Camille Couralet, Tom De Mil, Bhely Angoboy Ilondea, Peter M. Umunay, Joris Van Acker, David Harris, Jefferson S. Hall, James A. Comiskey, Jason Vleminckx, Sam Moore, Jan Reitsma, Aida Cuni-Sanchez, Joey Talbot, Lise Zemagho, Lindsay F. Banin, Lee J. T. White, John R. Poulsen, Murray Collins, Hans Beeckman, Victor Deklerck, Simon L. Lewis, Christelle Gonmadje, Yadvinder Malhi, Jean-Remy Makana, Wannes Hubau, Terry Sunderland, Nils Bourland, Marie-Noël Djuikouo Kamdem, Jacques Mukinzi, Oliver L. Phillips, Martin Gilpin, Bonaventure Sonké, Connie J. Clark, Faustin M. Mbayu, Olivier J. Hardy, Ted R. Feldpausch, Serge K. Begne, Martin J. P. Sullivan, Mélissa Rousseau, Gabriela Lopez-Gonzalez, Eric Chezeaux, Hermann Taedoumg, Corneille E. N. Ewango, and Laurent Nsenga

Subjects
0106 biological sciences, 0301 basic medicine, Carbon Sequestration, Time Factors, chemistry.chemical_element, Plant Science, Carbon sequestration, Forests, 01 natural sciences, Ecology and Environment, Carbon cycle, Carbon Cycle, Trees, 03 medical and health sciences, Tropical climate, Forest ecology, Tropical Climate, Ecology, Carbon sink, Understory, Carbon, 030104 developmental biology, chemistry, Democratic Republic of the Congo, Environmental science, Biologie, 010606 plant biology & botany, Tropical rainforest
Abstract

Quantifying carbon dynamics in forests is critical for understanding their role in long-term climate regulation 1–4 .Yet little is known about tree longevity in tropical forests 3,5–8 ,a factor that is vital for estimating carbon persistence 3,4 .Here we calculate mean carbon age (the period that carbon is fixed in trees 7 ) in different strata of African tropical forests using (1) growth-ring records with a unique timestamp accurately demarcating 66 years of growth in one site and (2) measurements of diameter increments from the African Tropical Rainforest Observation Network (23 sites). We find that in spite of their much smaller size, in understory trees mean carbon age (74 years) is greater than in sub-canopy (54 years) and canopy (57 years) trees and similar to carbon age in emergent trees (66 years). The remarkable carbon longevity in the understory results from slow and aperiodic growth as an adaptation to limited resource availability 9–11 .Our analysis also reveals that while the understory represents a small share (11%) of the carbon stock 12,13 ,it contributes disproportionally to the forest carbon sink (20%). We conclude that accounting for the diversity of carbon age and carbon sequestration among different forest strata is critical for effective conservation management 14–16 and for accurate modelling of carbon cycling 4 .© 2019, The Author(s), under exclusive licence to Springer Nature Limited., SCOPUS: le.j, info:eu-repo/semantics/published

Published
2018

12. Diversity and carbon storage across the tropical forest biome

Author

Connie J. Clark, Kofi Affum-Baffoe, Lan Qie, Timothy R. Baker, Abel Monteagudo-Mendoza, Lise Zemagho, Yadvinder Malhi, Javier Silva Espejo, Patricia Alvarez-Loayza, Lindsay F. Banin, Jefferson S. Hall, Ima Célia Guimarães Vieira, H. Priyadi, Jérôme Chave, Fernando Cornejo Valverde, Peter M. Umunay, J. W. Ferry Slik, Martin Gilpin, Ana Andrade, Andrew R. Marshall, Alvaro Cogollo Pacheco, Bonaventure Sonké, Rodrigo Sierra, Jan Bogaert, Emanuel Gloor, Christopher Baraloto, Guido Pardo, Nicholas J. Berry, Simon L. Lewis, Georgia Pickavance, Axel Dalberg Poulsen, Ismayadi Samsoedin, Vincent A. Vos, Carlos Cerón, Jean-Louis Doucet, Peter S. Ashton, William F. Laurance, Wannes Hubau, Thomas E. Lovejoy, Eric Chezeaux, Zorayda Restrepo, Aida Cuni-Sanchez, Kanehiro Kitayama, Everton Cristo de Almeida, Luiz E. O. C. Aragão, Sophie Fauset, Nadir Pallqui Camacho, Jan Reitsma, Corneille E. N. Ewango, Percy Núñez Vargas, Hans ter Steege, John Terborgh, Roel J. W. Brienen, Jean-François Bastin, Kamariah Abu Salim, Jon C. Lovett, Beatriz Schwantes Marimon, Simon Willcock, Marisol Toledo, Ben Hur Marimon Junior, Serge K. Begne, Greta C. Dargie, Carlos A. Quesada, Terese B. Hart, Martin J. P. Sullivan, Terry Sunderland, Ted R. Feldpausch, Eurídice N. Honorio Coronado, Stuart J. Davies, Lera Miles, Sean C. Thomas, Lip Khoon Kho, Lisa Steel, Jaques Mukinzi, Marie Noel Djuikouo K., Rafael de Paiva Salomão, Terry L. Erwin, Ervan Rutishauser, Edmar Almeida de Oliveira, Rafael Herrera, Shin-ichiro Aiba, Faustin Mpanya Lukasu, Damien Bonal, Sylvester Tan, Esteban Alvarez Dávila, Marielos Peña-Claros, José Luís Camargo, Lee J. T. White, James A. Comiskey, Hermann Taedoumg, Maxime Réjou-Méchain, Pascal Petronelli, Jean-Remy Makana, Ophelia Wang, Richard B. Primack, Gerardo A. Aymard C, Charles De Cannière, Luis Valenzuela Gamarra, Gabriela Lopez-Gonzalez, Leandro Maracahipes, Kuswata Kartawinata, Michael Balinga, Victor Chama Moscoso, Susan G. Laurance, Marcos Silveira, David Harris, Miguel E. Leal, Paulo S. Morandi, John Tshibamba Mukendi, Frans Bongers, Joey Talbot, Douglas Sheil, Reuben Nilus, John R. Poulsen, Oliver L. Phillips, Sch Geog, University of Nottingham, Dept Geog, University College of London [London] (UCL), Plant Systemat & Ecol Lab, Université de Yaoundé, Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Centre National de la Recherche Scientifique (CNRS), Instituto Nacional de Pesquisas da Amazônia (INPA), United Nations Environment Programme World Conservation Monitoring Centre, Missouri Botanical Garden (USA), Universidad Nacional San Antonio Abad del Cusco, Center for International Forestry Research (CIFOR), Coll Marine & Environm Sci, James Cook University, Leiden University, Agence Nationale des Parcs Nationaux du Gabon, Ecole de Terrain en Ecologie Tropicale (ECOTROP), Mensurat Unit, Forestry Research Institute of Ghana, Grad Sch Sci & Engn, Kagoshima University, Inst Biodiversidade & Floresta, Universidade Federal do Oeste do Pará, Universidade Federal do Mato Grosso (UFMT), Ctr Trop Conservat, Duke University [Durham], Universidad Nacional de Colombia, Coll Life & Environm Sci, University of Exeter, Dept Organism & Evolutionary Biol, Harvard University [Cambridge], Programa Ciencias Agro & Mar, Herbario Universitario PORT, Ctr Ecol & Hydrol, Dept Biol Sci, Int Ctr Trop Bot, Florida International University (FIU), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Biens et services des écosystèmes forestiers tropicaux : l'enjeu du changement global (Cirad-Es-UPR 105 BSEF), Département Environnements et Sociétés (Cirad-ES), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Sch Geosci, University of Edinburgh, Biodivers & Landscape Unit, Université de Liège, Gembloux Agro-Bio Tech [Gembloux], Ecologie et Ecophysiologie Forestières [devient SILVA en 2018] (EEF), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL), Forest Ecol & Forest Management Grp, Wageningen University and Research Centre [Wageningen] (WUR), Projeto Dinam Biol Fragmentos Florestais, Herbario Alfredo Paredes, Universidad Agraria del Ecuador, Rougier Gabon, Nicholas Sch Environm, Duke University, Jardín Botánico de Medellín, Inventory & Monitoring Program, National Park Service, Smithsonian Institution, Andes to Amazon Biodiversity Program, Instituto de Investigaciones de la Amazonía Peruana, Smithsonian Tropical Research Institute, Landscape Ecol & Vegetal Prod Syst Unit, Université Libre de Bruxelles [Bruxelles] (ULB), Dept Bot & Plant Physiol, Fac Sci, University of Buea, Wildlife Conservation Society, Centre de Formation et de Recherche en Conservation Forestière (CEFRECOF), Department of Biology [Copenhagen], Faculty of Science [Copenhagen], University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU), Ctr Ecol, Instituto Venezolano de Investigaciones Cientificas (IVIC), Inst Geog & Reg Forsch, University of Vienna, Royal Botanic Garden Edinburgh, Lukuru Wildlife Res Fdn, Div Vertebrate Zool, National Museum of Natural History, Herbarium Bogoriense, Indonesian Institute of Sciences, Integrat Res Ctr, Field Museum of Natural History [Chicago, USA], Trop Peat Res Inst, Biol Res Div, Malaysian Palm Oil Board, Kyoto University, Ctr Trop Environm & Sustainabil Sci, Coll Sci & Engn, Dept Environm Sci & Policy, George Mason University, Fac Sci Agron, University of Kisangani, Sch Geog & Environm, University of Oxford, Universidade Federal de Goiás [Goiânia] (UFG), Flamingo Land LTD, Dept Environm, CIRCLE, University of York, Salonga Natl Pk, sabah Parks, Universidad Autonoma del Beni, Inst Boliviano Invest Forestal, Ecologie des forêts de Guyane (UMR ECOFOG), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-AgroParisTech-Université de Guyane (UG)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Natural History Museum [Oslo], University of Oslo (UiO), Southern Swedish Forest Res Ctr, Swedish University of Agricultural Sciences (SLU), Bur Waarderburg, Fundación Con-Vida, CarboForExpert, Fac Sci, Environm & Life Sci, University of Brunei Darussalam (Biology Department), Museu Paraense Emílio Goeldi, Forestry Research and Development Agency (FORDA), Norwegian University of Life Sciences (NMBU), Geoinformática y Sistemas , Cia. Ltda (GeoIS), Museu Univ, Universidade Federal do Acre (UFAC), World Wide Fund for Nature, CTFS AA Asia Program, Fac Forestry, University Stefan cel Mare of Suceava (USU), Sch Forestry & Environm Studies, Yale University [New Haven], Centro de Investigación y Promoción del Campesinado Norte Amazónico, Sch Earth Sci & Environm Sustainabil, Northern Arizona University [Flagstaff], Biol Sci, Liverpool John Moore University (ljmu), Sch Environm Nat Resources & Geog, Bangor University, European Research Council (ERC), Gordon and Betty Moore Foundation, David and Lucile Packard Foundation, European Union's Seventh Framework Programme 283080, 282664, Natural Environment Research Council (NERC) Urgency Grants, NERC Consortium Grant 'AMAZONICA' NE/F005806/1, NERC Consortium Grant 'TROBIT' NE/D005590/1, NERC Consortium Grant 'BIO-RED' NE/N012542/1, NERC New Investigators Grant, Royal Society, Centre for International Forestry (CIFOR), Gabon's National Parks Agency (ANPN), NERC PhD Studentship, UNEP-WCMC, NERC research fellowship NE/I021160/1, Royal Society University Research Fellowship ERC Advanced Grant (T-FORCES), Phillip Leverhulme Prize, Royal Society Wolfson Research Merit Award, NERC studentship, RGS-IBG Henrietta Hutton Grant, National Council for Science and Technology Development of Brazil (CNPq) PELD/403725/2012-7, CNPq/PPBio/457602/2012-0, National Council for Science and Technology Development of Brazil (CNPq) Productivity Grant, Leverhulme Trust under the Valuing the Arc project, Missouri Botanical Garden, Sullivan, Martin J. P., Université de Yaoundé I, Universidad Nacional de San Antonio Abad del Cusco (UNSAAC), Consultative Group on International Agricultural Research [CGIAR] (CGIAR), Florida International University [Miami] (FIU), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [France-Sud]), Biens et services des écosystèmes forestiers tropicaux : l'enjeu du changement global (UPR BSEF), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Wageningen University and Research [Wageningen] (WUR), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Université libre de Bruxelles (ULB), University of Vienna [Vienna], Indonesian Institute of Sciences (LIPI), University of Oxford [Oxford], Université des Antilles (UA)-Université de Guyane (UG)-Centre National de la Recherche Scientifique (CNRS)-AgroParisTech-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA), Southern Swedish Forest Research Centre, Museu Paraense Emílio Goeldi [Belém, Brésil] (MPEG), Université de Toulouse (UT), James Cook University (JCU), Universiteit Leiden, Agence Nationale des Parcs Nationaux du Gabon (ANPN), Harvard University, University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH), and Royal Botanic Garden [Edinburgh]

Subjects
0106 biological sciences, 010504 meteorology & atmospheric sciences, INCREASES, ALPHA-DIVERSITY, [SDV]Life Sciences [q-bio], Biome, Biodiversity, COMPLEMENTARITY, forêt tropicale, Forests, 01 natural sciences, AMAZONIAN FORESTS, Tropic Climate, biodiversité, biomasse aérienne des arbres, conservation des forêts, Tropical climate, stockage du carbone, Biomass (ecology), Multidisciplinary, PRODUCTIVITY, Agroforestry, Ecology, Plants, PE&RC, Classification, Tropical ecology, Chemistry, séquestration du carbone, biome, diversité variétale, protection de la forêt, P01 - Conservation de la nature et ressources foncières, ABOVEGROUND BIOMASS, tropical forest, Asia, F60 - Physiologie et biochimie végétale, TREE ALPHA-DIVERSITY, forêt amazonienne, CONSERVATION, 010603 evolutionary biology, Article, Ecology and Environment, Phénomènes atmosphériques, Forest ecology, Life Science, Bosecologie en Bosbeheer, Forest, AFRICAN RAIN-FORESTS, WOOD PRODUCTION, BIODIVERSITY, CLIMATE, K70 - Dégâts causés aux forêts et leur protection, atténuation des effets du changement climatique, 0105 earth and related environmental sciences, Tropical Climate, Western Hemisphere, TREE SPECIES RICHNESS, Tropics, Plant, 15. Life on land, Forest Ecology and Forest Management, Carbon, biodiversité forestière, DOMINANCE, 13. Climate action, Earth and Environmental Sciences, Africa, Alpha diversity, Americas, structure de la canopée
Abstract

Tropical forests are global centres of biodiversity and carbon storage. Many tropical countries aspire to protect forest to fulfil biodiversity and climate mitigation policy targets, but the conservation strategies needed to achieve these two functions depend critically on the tropical forest tree diversity-carbon storage relationship. Assessing this relationship is challenging due to the scarcity of inventories where carbon stocks in aboveground biomass and species identifications have been simultaneously and robustly quantified. Here, we compile a unique pan-Tropical dataset of 360 plots located in structurally intact old-growth closed-canopy forest, surveyed using standardised methods, allowing a multi-scale evaluation of diversity-carbon relationships in tropical forests. Diversity-carbon relationships among all plots at 1 ha scale across the tropics are absent, and within continents are either weak (Asia) or absent (Amazonia, Africa). A weak positive relationship is detectable within 1 ha plots, indicating that diversity effects in tropical forests may be scale dependent. The absence of clear diversity-carbon relationships at scales relevant to conservation planning means that carbon-centred conservation strategies will inevitably miss many high diversity ecosystems. As tropical forests can have any combination of tree diversity and carbon stocks both require explicit consideration when optimising policies to manage tropical carbon and biodiversity., 0, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2017

13. On the delineation of tropical vegetation types with an emphasis on forest/savanna transitions

Author

Pierre Hiernaux, Gloria Djagbletey, Martin Gilpin, Bonaventure Sonké, Daniel J. Metcalfe, John Grace, Elmar Veenendaal, Kofi Affum-Baffoe, J. A. Ratter, Eric Mougin, Michelle L. Johnson, Fidele Hien, Mireia Torello-Raventos, Michael I. Bird, Jon Lloyd, Eddie Lenza, Leandro Maracahipes, L. Arroyo, Daniel Villarroel, Gustavo Saiz, Michael P. Schwarz, Kalu Davies, David M. J. S. Bowman, Heloisa Sinatora Miranda, Carlos A. Quesada, F. Yoko Ishida, Karle Sykora, Nikolaos M. Fyllas, Simon L. Lewis, Mark Steininger, Hermann Taedoumg, Oliver L. Phillips, Tomas F. Domingues, John Thomson, Adama Diallo, Denise Sasaki, Ted R. Feldpausch, Ben Hur Marimon Junior, J.E. Kemp, Louis Zapfack, Beatriz Schwantes Marimon, Timothy J. Killeen, Franziska Schrodt, Andrew Ford, Gabriela Bielefeld Nardoto, and Halidou Compaore

Subjects
0106 biological sciences, rain-forest, 010504 meteorology & atmospheric sciences, african vegetation, Plant Ecology and Nature Conservation, Plant Science, Rainforest, Land cover, 010603 evolutionary biology, 01 natural sciences, Tropical vegetation, medicine, brazilian cerrado, land-cover, cerrado vegetation, Ecology, Evolution, Behavior and Systematics, 0105 earth and related environmental sciences, Ecology, MUDANÇA CLIMÁTICA, Tropics, savanna vegetation, Plant community, Ecotone, Understory, 15. Life on land, PE&RC, Geography, ecological classification, climate-change, plant-communities, Plantenecologie en Natuurbeheer, medicine.symptom, Vegetation (pathology), physiognomic classification
Abstract

Background: There is no generally agreed classification scheme for the many different vegetation formation types occurring in the tropics. This hinders cross-continental comparisons and causes confusion as words, such as ‘forest’ and ‘savanna’ have different meanings to different people. Tropical vegetation formations are therefore usually imprecisely and/or ambiguously defined in modelling, remote sensing and ecological studies. Aims: To integrate observed variations in tropical vegetation structure and floristic composition into a single classification scheme. Methods: Using structural and floristic measurements made on three continents, discrete tropical vegetation groupings were defined on the basis of overstorey and understorey structure and species compositions by using clustering techniques. Results: Twelve structural groupings were identified based on height and canopy cover of the dominant upper-stratum and the extent of lower-strata woody shrub cover and grass cover. Structural classifications did not, however, always agree with those based on floristic composition; especially for plots located in the forest-savanna transition zone. This duality is incorporated into a new tropical vegetation classification scheme. Conclusions: Both floristics and stand structure are important criteria for the meaningful delineation of tropical vegetation formations, especially in the forest/savanna transition zone. A new tropical vegetation classification scheme incorporating this information has been developed.

Published
2013
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14. A novel class of azatricyclononanes: pentasubstituted cyclopropanes from an uncatalysed reaction

Author

Mark G. Moloney, Martin Gilpin, Lawrence Harris, Andrew R. Cowley, and Amber L. Thompson

Subjects
Inorganic Chemistry, chemistry.chemical_compound, Class (set theory), chemistry, Stereochemistry, Organic Chemistry, Organic chemistry, Stereoselectivity, Pyroglutamic acid, Physical and Theoretical Chemistry, Catalysis
Abstract

The direct and versatile stereoselective synthesis of a novel class of cyclopropyl derivatives of pyroglutamic acid is reported, using substituted diaryldiazo compounds. The course of the reaction has been investigated, and yields of substituted fluorenylcyclopropanes are greater than those of diphenylmethylcyclopropane analogues. © 2009 Elsevier Ltd. All rights reserved.

Published
2016

15. Substituted diaryldiazomethanes and diazofluorenes: Structure, reactivity and stability

Author

Aman Karim, Philip J. Davis, Claire Thompson, Amber L. Thompson, Lawrence Harris, Matthew J. Pound, Mark G. Moloney, and Martin Gilpin

Subjects
nervous system, Chemistry, musculoskeletal, neural, and ocular physiology, Organic Chemistry, Drug Discovery, Molecule, Organic chemistry, Reactivity (chemistry), macromolecular substances, Structure reactivity, Biochemistry, Chemical synthesis
Abstract

The synthesis of several substituted diaryldiazomethanes and diazofluorenes, and an assessment of their structure, reactivity and stability, is reported. © 2011 Elsevier Ltd. All rights reserved.

Published
2016

17. Structural, physiognomic and above-ground biomass variation in savanna-forest transition zones on three continents - How different are co-occurring savanna and forest formations?

Author

Keith J. Bloomfield, J. Gignoux, Jon Lloyd, Michael I. Bird, Kofi Affum-Baffoe, Daniel Villarroel, Kalu Davies, Halidou Compaore, Michael P. Schwarz, Tomas F. Domingues, Heloisa Sinatora Miranda, J Kemp, Ben Hur Marimon-Junior, Andrew Ford, Gloria Djagbletey, J. A. Ratter, Ted R. Feldpausch, Gustavo Saiz, G. Ceca, Louis Zapfack, Daniel J. Metcalfe, F. Yoko Ishida, Eric Mougin, Fidele Hien, F. Gerard, Mireia Torello-Raventos, Michelle L. Johnson, Beatriz Schwantes Marimon, Karle Sykora, Gabriela Bielefeld Nardoto, Martin Gilpin, Pierre Hiernaux, Bonaventure Sonké, Carlos A. Quesada, Timothy J. Killeen, John Grace, Nikolaos M. Fyllas, Oliver L. Phillips, Adama Diallo, Denise Sasaki, Elmar Veenendaal, Franziska Schrodt, Simon L. Lewis, Leandro Maracahipes, L. Arroyo, Marc K. Steininger, Eddie Lenza, Unité de recherche Biogéochimie des Ecosystèmes Forestiers (BEF), Institut National de la Recherche Agronomique (INRA), Chercheur indépendant, Laboratoire de Botanique systématique et d'Ecologie [ENS Yaoudé], Université de Yaoundé I-École normale supérieure [ENS] - Yaoundé 1, School of Geography, Earth and Biosphere Institute, University of Leeds, Museo Noel Kempff Mercado, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR48, Institut des sciences biologiques (INSB-CNRS)-Institut des sciences biologiques (INSB-CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Ecologie et évolution, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Centre d'études spatiales de la biosphère (CESBIO), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Center for Applied Biodiversity Science, Conservation Int., Physics and Materials Science Research Unit, University of Luxembourg, University of Luxembourg [Luxembourg], Institute of Ecology and Resource Management, University of Edinburgh, Earth and Biosphere Institute, School of Geography, The Royal Society, Université de Yaoundé I [Yaoundé]-École normale supérieure [ENS] - Yaoundé 1, University of Greenwich, INSB-INSB-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-École normale supérieure - Paris (ENS Paris), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS Paris), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), and Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Canopy, 0106 biological sciences, national-park, 010504 meteorology & atmospheric sciences, 05 Environmental Sciences, lcsh:Life, alternative stable states, 01 natural sciences, Aboveground Biomass, Remote Sensing, Savanna, ddc:550, Meteorology & Atmospheric Sciences, Vegetation Type, Geosciences, Multidisciplinary, ComputingMilieux_MISCELLANEOUS, Biomass (ecology), Understory, Ecology, Leaf Area Index, Grass, lcsh:QE1-996.5, Geology, Vegetation, PE&RC, Transition Zone, southern africa, Physical Sciences, amazonian forest, Plantenecologie en Natuurbeheer, Life Sciences & Biomedicine, Forest transition, Woody plant, tropical forest, [INFO.INFO-CC]Computer Science [cs]/Computational Complexity [cs.CC], 04 Earth Sciences, Environmental Sciences & Ecology, Plant Ecology and Nature Conservation, ECOFISIOLOGIA VEGETAL, Poaceae, functional types, 010603 evolutionary biology, Ecology and Environment, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, Climate Effect, Alternative stable state, lcsh:QH540-549.5, brazilian cerrado, Bosecologie en Bosbeheer, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, cerrado vegetation, Ecology, Evolution, Behavior and Systematics, Earth-Surface Processes, 0105 earth and related environmental sciences, Woody Plant, Tree canopy, Herb, Science & Technology, tree height, Australia, South America, 06 Biological Sciences, 15. Life on land, [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation, Floristics, Forest Ecology and Forest Management, lcsh:Geology, Earth sciences, lcsh:QH501-531, 13. Climate action, Forest Canopy, Africa, lcsh:Ecology, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Coexistence, woody vegetation
Abstract

Through interpretations of remote-sensing data and/or theoretical propositions, the idea that forest and savanna represent "alternative stable states" is gaining increasing acceptance. Filling an observational gap, we present detailed stratified floristic and structural analyses for forest and savanna stands located mostly within zones of transition (where both vegetation types occur in close proximity) in Africa, South America and Australia. Woody plant leaf area index variation was related to tree canopy cover in a similar way for both savanna and forest with substantial overlap between the two vegetation types. As total woody plant canopy cover increased, so did the relative contribution of middle and lower strata of woody vegetation. Herbaceous layer cover declined as woody cover increased. This pattern of understorey grasses and herbs progressively replaced by shrubs as the canopy closes over was found for both savanna and forests and on all continents. Thus, once subordinate woody canopy layers are taken into account, a less marked transition in woody plant cover across the savanna–forest-species discontinuum is observed compared to that inferred when trees of a basal diameter > 0.1 m are considered in isolation. This is especially the case for shrub-dominated savannas and in taller savannas approaching canopy closure. An increased contribution of forest species to the total subordinate cover is also observed as savanna stand canopy closure occurs. Despite similarities in canopy-cover characteristics, woody vegetation in Africa and Australia attained greater heights and stored a greater amount of above-ground biomass than in South America. Up to three times as much above-ground biomass is stored in forests compared to savannas under equivalent climatic conditions. Savanna–forest transition zones were also found to typically occur at higher precipitation regimes for South America than for Africa. Nevertheless, consistent across all three continents coexistence was found to be confined to a well-defined edaphic–climate envelope with soil and climate the key determinants of the relative location of forest and savanna stands. Moreover, when considered in conjunction with the appropriate water availability metrics, it emerges that soil exchangeable cations exert considerable control on woody canopy-cover extent as measured in our pan-continental (forest + savanna) data set. Taken together these observations do not lend support to the notion of alternate stable states mediated through fire feedbacks as the prime force shaping the distribution of the two dominant vegetation types of the tropical lands.

Published
2015

18. Identification of a Series of Tricyclic Natural Products as Potent Broad-Spectrum Inhibitors of Metallo-β-Lactamases

Author

David G. Tew, Alfonso Rivera-Sagredo, Paloma Perez, Cheryl A. Janson, Nestor O. Concha, Martin Gilpin, Juan A. Hueso-Rodríguez, Michael Rees, John H. Bateson, Jesús Ángel de la Fuente, Helen F. Boyd, Niconovich Nancy, Stewart C. Pearson, Christy Cheever, David J. Payne, E. Diez, and Stephen Rittenhouse

Subjects
Models, Molecular, medicine.drug_class, Klebsiella pneumoniae, Antibiotics, Bacillus, Microbial Sensitivity Tests, Chaetomium, medicine.disease_cause, beta-Lactamases, Microbiology, Bacillus cereus, polycyclic compounds, medicine, Pharmacology (medical), Enzyme Inhibitors, Antibacterial agent, Pharmacology, chemistry.chemical_classification, Binding Sites, biology, Pseudomonas aeruginosa, Drug Synergism, Meropenem, Chemistry, Biosynthesis, biochemical phenomena, metabolism, and nutrition, bacterial infections and mycoses, biology.organism_classification, Kinetics, Infectious Diseases, Enzyme, Biochemistry, chemistry, Enzyme inhibitor, Fermentation, Serratia marcescens, biology.protein, bacteria, Thienamycins, Bacteroides fragilis, beta-Lactamase Inhibitors, Heterocyclic Compounds, 3-Ring
Abstract

Metallo-β-lactamases provide bacteria with an efficient and effective way of mediating resistance to β-lactam-based antibacterial agents. More significantly, they confer resistance to carbapenems. Therefore, if metallo-β-lactamases increase in prevalence, they could compromise the efficacy of this group of antibiotics to treat life-threatening hospital infections. Metallo-β-lactamases have now been identified in a wide spectrum of clinically important pathogens, such as Klebsiella pneumoniae, Pseudomonas aeruginosa, Serratia marcescens, and Acinetobacter sp. (21; H. Ito, K. Senda, T. Yagi, K. Shibayama, M. Ohta, N. Kato, and Y. Arakawa, Abstr. 37th Intersci. Conf. Antimicrob. Agents Chemother., abstr. C-93, 1997). These enzymes also possess a proven capability to disseminate through bacterial populations, which is demonstrated by the spread of the IMP-1 metallo-β-lactamase in Japan (reviewed in reference 17). The spread of this enzyme is thought to be facilitated by its being encoded on an integron (1). More recently, clinical isolates producing metallo-β-lactamases have been identified in Europe (5, 12, 24). One approach to combating this potential clinical problem is the use of a specific metallo-β-lactamase inhibitor in combination with a β-lactam antibiotic. In this regard a range of different non-β-lactam based molecules have been identified as specific inhibitors of these enzymes. A series of mercaptoacetic acid thiol ester compounds were identified as mechanism-based, irreversible inhibitors of metallo-β-lactamases (18). Walter et al. (23) described a series of trifluoromethyl alcohol and ketone inhibitors that were competitive inhibitors of a range of metallo-β-lactamases, and a group of biphenyl tetrazole compounds have been shown to be specific inhibitors of the Bacteroides fragilis CfiA-type metallo-β-lactamase (22). None of these compounds exhibited significant synergy with β-lactam antibiotics, nor did they exhibit potent broad-spectrum inhibition of metallo-β-lactamases. However, a recently discovered series of mercaptocarboxylates have been shown to exhibit both broad-spectrum metallo-β-lactamase inhibitory activity and antibacterial synergy with meropenem (17). In our quest to identify novel inhibitors of metallo-β-lactamases, we screened natural product extracts against the Bacillus cereus II enzyme and identified an extract from a strain of Chaetomium funicola with inhibitory activity against metallo-β-lactamases. SB236050, SB238569, and SB236049 were successfully extracted and purified from this extract, and we now report on the purification, extraction, and characterization of this novel series of metallo-β-lactamase inhibitors derived from a natural product.

Published
2002

19. Isolation and Structure Determination of Two Novel Phenazines from a Streptomyces with Inhibitory Activity against Metallo-enzymes, Including Metallo-.BETA.-lactamase

Author

Martin Gilpin, Mark Fulston, Rebecca Cramp, David J. Payne, and Ian Hood

Subjects
Pharmacology, Molecular Structure, biology, Chemistry, Stereochemistry, Streptomycetaceae, Metalloendopeptidases, Active site, Biological activity, Microbial Sensitivity Tests, biology.organism_classification, Streptomyces, Anti-Bacterial Agents, Structure-Activity Relationship, Fermentation, Drug Discovery, biology.protein, Phenazines, Bacteroides fragilis, Mode of action, Antibacterial activity, Antibacterial agent
Abstract

Two novel metabolites, SB 212021 and SB 212305, have been isolated from a Streptomyces and shown to have molecular formulae of C15H10N2O5 and C20H17N3O8S, respectively. The structures were deduced by a combination of NMR techniques and mass spectral fragmentation patterns and shown to be novel members of the phenazine group of antibiotics. In the absence of added zinc, both compounds had IC50's of 1-75 microM for the Bacteroides fragilis 262 CfiA and Xanthomonas maltophilia L-1 metallo-beta-lactamases. The compounds also inhibited ACE with IC50's of 55 and 68 microM, respectively. Mode of action studies illustrate that the compounds inhibit some metalloenzymes by chelation of the active site metal ion. They exhibit poor antibacterial activity.

Published
1995

22. SB-203207 and SB-203208, two novel isoleucyl tRNA synthetase inhibitors from a Streptomyces sp. II. Structure determination

Author

Catherine S. V. Houge-Frydrych, Peter W. Skett, John W. Tyler, and Martin Gilpin

Subjects
Isoleucine-tRNA Ligase, Magnetic Resonance Spectroscopy, Stereochemistry, Pyridines, Altemicidin, Isoleucine—tRNA ligase, Streptomyces, Hydrolysis, Alkaloids, Drug Discovery, Enzyme Inhibitors, Chromatography, High Pressure Liquid, Antibacterial agent, Pharmacology, chemistry.chemical_classification, Sulfonamides, Antibiotics, Antineoplastic, biology, Molecular Structure, Sulfur Compounds, Streptomycetaceae, biology.organism_classification, Enzyme, chemistry, Indenes, Actinomycetales
Abstract

Two novel isoleucyl tRNA synthetase inhibitors, SB-203207 and SB-203208 have been isolated from a Streptomyces sp. and found to be structurally related to altemicidin. Structures of SB-203207 and SB-203208 have been deduced by a combination of spectroscopic techniques, derivatisation, hydrolysis studies and found to be 4-(aminocarbonyl)-7-[[(2-amino-3-methylpentanoyl)aminosul phonyl]acetamido]-2,4a,5,6,7,7a-hexahydro-6-hydroxy-2-methyl-1H-2- pyrindine-7-carboxylic acid (1) and 4-(aminocarbonyl)-7-[[(2-amino-3-methyl pentanoyl)-aminosulphonyl]acetamido]-2,4a,5,6,7,7a-hexahydro-6-(2- amino-3-phenylbutanoyl oxy)-2-methyl-1H-2-pyrindine-7-carboxylic acid (2), respectively.

Published
2000

23. ChemInform Abstract: TOTAL SYNTHESIS OF β-LACTAMASE INHIBITORS RELATED TO CLAVULANIC ACID

Author

Gerald Brooks, Peter H. Bentley, Martin Gilpin, and Eric Hunt

Subjects
chemistry.chemical_compound, Heptane, β lactamase inhibitor, chemistry, Clavulanic acid, medicine, Total synthesis, Geometric isomer, General Medicine, Medicinal chemistry, Vinyl chloride, medicine.drug
Abstract

(E)-3-Methoxycarbonylmethylene-7-oxo-4-oxa-1-azabicyclo[3.2.0]heptane (6), its geometric isomer (7), and a related vinyl chloride (8) have been obtained by a three-step synthesis from 4-methylthioazetidin-2-one.

Published
1978

24. High aboveground carbon stock of African tropical montane forests

Author

Janvier Lisingo, Tibebu Y. Simegn, Miroslav Svoboda, Murielle Simo-Droissart, Dismas Hakizimana, Charles Kayijamahe, Emanuel H. Martin, Aida Cuni-Sanchez, Jan Altman, Petri Pellikka, Hans Verbeeck, Rob Marchant, Andreas Hemp, Jefferson S. Hall, Jiri Dolezal, Janne Heiskanen, Valerio Avitabile, Pascal Boeckx, Olivier J. Hardy, Vincent Droissart, Roy E. Gereau, Mark Lung, Felix Nchu, Hermann Taedoumg, Philip J. Platts, Charlotte E. Wheeler, Jonathan Timberlake, Colin A. Chapman, Brigitte Nyirambangutse, Andrew J. Plumptre, Demisse Sheleme, Abreham Berta Aneseyee, Joseph Okello, Terese B. Hart, Peter M. Umunay, John Tshibamba Mukendi, Lan Qie, Simon L. Lewis, Mathieu Decuyper, Senbeta Feyera, Teshome Soromessa, Kelvin S.-H. Peh, Corneille E. N. Ewango, Simon Willcock, Wannes Hubau, Aster Gebrekirstos, Edward T. A. Mitchard, Ben DeVries, Gerard Imani, Martin Herold, David Horák, Andrew R. Marshall, Serge K. Begne, Achim Bräuning, Kim Calders, C. Amani, A. C. Hamilton, Marie Noel Djuikouo Kamdem, Jean-Remy Makana, Martin J. P. Sullivan, Mwangi James Kinyanjui, Yadvinder Malhi, Tomáš Albrecht, Tom Muller, Hazel M. Chapman, Robert Bitariho, Julia A. Klein, Alain Senghor K. Ngute, Marijn Bauters, Eustrate Uzabaho, Göran Wallin, Christine B. Schmitt, Hari Adhikari, Iveren Abiem, Franklin Bulonvu, Ulrike Hiltner, Moses Nsanyi Sainge, James Taplin, Amy C. Bennett, John T. Woods, Sean C. Thomas, Jason Vleminckx, David Taylor, Oliver L. Phillips, Alexandra C. Morel, James A. Comiskey, Douglas Sheil, Thalès de Haulleville, Francesco Rovero, Darlington Tuagben, Neil D. Burgess, Jon C. Lovett, Terry Sunderland, Rodrigue Batumike, Martin Gilpin, Bonaventure Sonké, Jan Bogaert, Ondrej Sedlacek, Etienne Zibera, David Kenfack, Lindsay F. Banin, Hans Beeckman, University of York [York, UK], Manchester Metropolitan University (MMU), International Union for Conservation of Nature (IUCN), University of Leeds, Université officielle de Bukavu, Royal Museum for Central Africa [Tervuren] (RMCA), University of Jos [Nigeria], Helsingin yliopisto = Helsingfors universitet = University of Helsinki, Charles University [Prague] (CU), Addis Ababa University (AAU), European Commission - Joint Research Centre [Ispra] (JRC), UK Centre for Ecology & Hydrology, Natural Environment Research Council (NERC), Universiteit Gent = Ghent University (UGENT), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), University of Rwanda, European Project: 328075,EC:FP7:PEOPLE,FP7-PEOPLE-2012-IEF,ASEC-DRYLAND-FORESTS(2014), University of Helsinki, Universiteit Gent = Ghent University [Belgium] (UGENT), Earth Change Observation Laboratory (ECHOLAB), and Department of Geosciences and Geography

Subjects
0106 biological sciences, DIVERSITY, Endangered species, Datasets as Topic, Geographic Mapping, life_on_land, [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy, 01 natural sciences, Trees, Laboratory of Geo-information Science and Remote Sensing, Biomass, 0303 health sciences, Biomass (ecology), GLOBAL PATTERNS, Multidisciplinary, Ecology, Reforestation, EASTERN ARC MOUNTAINS, Carbon cycle, [SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics, Biogeochemistry, PE&RC, Geography, MAP, C180 Ecology, climate_action, STORAGE, Carbon Sequestration, Conservation of Natural Resources, Rainforest, Climate Change, Climate change, 010603 evolutionary biology, Ecology and Environment, Earth and environmental sciences, 03 medical and health sciences, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, Forest ecology, Life Science, Ecosystem services, Bosecologie en Bosbeheer, Laboratorium voor Geo-informatiekunde en Remote Sensing, Ecosystem, 1172 Environmental sciences, 030304 developmental biology, Tropical Climate, SINK, Forestry, 15. Life on land, Carbon, Forest Ecology and Forest Management, Attitude, 13. Climate action, Africa, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Tropical rainforest
Abstract

Tropical forests store 40–50 per cent of terrestrial vegetation carbon 1. However, spatial variations in aboveground live tree biomass carbon (AGC) stocks remain poorly understood, in particular in tropical montane forests 2. Owing to climatic and soil changes with increasing elevation 3, AGC stocks are lower in tropical montane forests compared with lowland forests 2. Here we assemble and analyse a dataset of structurally intact old-growth forests (AfriMont) spanning 44 montane sites in 12 African countries. We find that montane sites in the AfriMont plot network have a mean AGC stock of 149.4 megagrams of carbon per hectare (95% confidence interval 137.1–164.2), which is comparable to lowland forests in the African Tropical Rainforest Observation Network 4 and about 70 per cent and 32 per cent higher than averages from plot networks in montane 2,5,6 and lowland 7 forests in the Neotropics, respectively. Notably, our results are two-thirds higher than the Intergovernmental Panel on Climate Change default values for these forests in Africa 8. We find that the low stem density and high abundance of large trees of African lowland forests 4 is mirrored in the montane forests sampled. This carbon store is endangered: we estimate that 0.8 million hectares of old-growth African montane forest have been lost since 2000. We provide country-specific montane forest AGC stock estimates modelled from our plot network to help to guide forest conservation and reforestation interventions. Our findings highlight the need for conserving these biodiverse 9,10 and carbon-rich ecosystems.

25. Total synthesis of β-lactamase inhibitors related to clavulanic acid

Author

Martin Gilpin, Gerald Brooks, Eric Hunt, and Peter H. Bentley

Subjects
chemistry.chemical_compound, Heptane, β lactamase inhibitor, chemistry, Stereochemistry, Clavulanic acid, medicine, Molecular Medicine, Total synthesis, Geometric isomer, Vinyl chloride, medicine.drug
Abstract

(E)-3-Methoxycarbonylmethylene-7-oxo-4-oxa-1-azabicyclo[3.2.0]heptane (6), its geometric isomer (7), and a related vinyl chloride (8) have been obtained by a three-step synthesis from 4-methylthioazetidin-2-one.

Published
1977

26. A new total synthesis of (±)-clavulanic acid

Author

Peter H. Bentley, Martin Gilpin, Eric Hunt, and Gerald Brooks

Subjects
chemistry.chemical_classification, Double bond, Chemistry, Stereochemistry, Clavulanic acid, Organic Chemistry, Drug Discovery, medicine, Total synthesis, Regioselectivity, macromolecular substances, Biochemistry, medicine.drug
Abstract

Regioselective reactions at the terminal double bond of the racemic azetidinone dienylether (4), provides a source of clavulanic acid and several analogues.

Published
1979

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