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2. LiDAR-based reference aboveground biomass maps for tropical forests of South Asia and Central Africa

Author

Rodda, Suraj Reddy, Fararoda, Rakesh, Gopalakrishnan, Rajashekar, Jha, Nidhi, Réjou-Méchain, Maxime, Couteron, Pierre, Barbier, Nicolas, Alfonso, Alonso, Bako, Ousmane, Bassama, Patrick, Behera, Debabrata, Bissiengou, Pulcherie, Biyiha, Hervé, Brockelman, Warren Y., Chanthorn, Wirong, Chauhan, Prakash, Dadhwal, Vinay Kumar, Dauby, Gilles, Deblauwe, Vincent, Dongmo, Narcis, Droissart, Vincent, Jeyakumar, Selvaraj, Jha, Chandra Shekar, Kandem, Narcisse G., Katembo, John, Kougue, Ronald, Leblanc, Hugo, Lewis, Simon, Libalah, Moses, Manikandan, Maya, Martin-Ducup, Olivier, Mbock, Germain, Memiaghe, Hervé, Mofack, Gislain, Mutyala, Praveen, Narayanan, Ayyappan, Nathalang, Anuttara, Ndjock, Gilbert Oum, Ngoula, Fernandez, Nidamanuri, Rama Rao, Pélissier, Raphaël, Saatchi, Sassan, Sagang, Le Bienfaiteur, Salla, Patrick, Simo-Droissart, Murielle, Smith, Thomas B., Sonké, Bonaventure, Stevart, Tariq, Tjomb, Danièle, Zebaze, Donatien, Zemagho, Lise, and Ploton, Pierre

Published
2024
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3. Consistent patterns of common species across tropical tree communities

Author

Cooper, Declan L. M., Lewis, Simon L., Sullivan, Martin J. P., Prado, Paulo I., ter Steege, Hans, Barbier, Nicolas, Slik, Ferry, Sonké, Bonaventure, Ewango, Corneille E. N., Adu-Bredu, Stephen, Affum-Baffoe, Kofi, de Aguiar, Daniel P. P., Ahuite Reategui, Manuel Augusto, Aiba, Shin-Ichiro, Albuquerque, Bianca Weiss, de Almeida Matos, Francisca Dionízia, Alonso, Alfonso, Amani, Christian A., do Amaral, Dário Dantas, do Amaral, Iêda Leão, Andrade, Ana, de Andrade Miranda, Ires Paula, Angoboy, Ilondea B., Araujo-Murakami, Alejandro, Arboleda, Nicolás Castaño, Arroyo, Luzmila, Ashton, Peter, Aymard C, Gerardo A., Baider, Cláudia, Baker, Timothy R., Balinga, Michael Philippe Bessike, Balslev, Henrik, Banin, Lindsay F., Bánki, Olaf S., Baraloto, Chris, Barbosa, Edelcilio Marques, Barbosa, Flávia Rodrigues, Barlow, Jos, Bastin, Jean-Francois, Beeckman, Hans, Begne, Serge, Bengone, Natacha Nssi, Berenguer, Erika, Berry, Nicholas, Bitariho, Robert, Boeckx, Pascal, Bogaert, Jan, Bonyoma, Bernard, Boundja, Patrick, Bourland, Nils, Boyemba Bosela, Faustin, Brambach, Fabian, Brienen, Roel, Burslem, David F. R. P., Camargo, José Luís, Campelo, Wegliane, Cano, Angela, Cárdenas, Sasha, Cárdenas López, Dairon, de Sá Carpanedo, Rainiellen, Carrero Márquez, Yrma Andreina, Carvalho, Fernanda Antunes, Casas, Luisa Fernanda, Castellanos, Hernán, Castilho, Carolina V., Cerón, Carlos, Chapman, Colin A., Chave, Jerome, Chhang, Phourin, Chutipong, Wanlop, Chuyong, George B., Cintra, Bruno Barçante Ladvocat, Clark, Connie J., Coelho de Souza, Fernanda, Comiskey, James A., Coomes, David A., Cornejo Valverde, Fernando, Correa, Diego F., Costa, Flávia R. C., Costa, Janaina Barbosa Pedrosa, Couteron, Pierre, Culmsee, Heike, Cuni-Sanchez, Aida, Dallmeier, Francisco, Damasco, Gabriel, Dauby, Gilles, Dávila, Nállarett, Dávila Doza, Hilda Paulette, De Alban, Jose Don T., de Assis, Rafael L., De Canniere, Charles, De Haulleville, Thales, de Jesus Veiga Carim, Marcelo, Demarchi, Layon O., Dexter, Kyle G., Di Fiore, Anthony, Din, Hazimah Haji Mohammad, Disney, Mathias I., Djiofack, Brice Yannick, Djuikouo, Marie-Noël K., Do, Tran Van, Doucet, Jean-Louis, Draper, Freddie C., Droissart, Vincent, Duivenvoorden, Joost F., Engel, Julien, Estienne, Vittoria, Farfan-Rios, William, Fauset, Sophie, Feeley, Kenneth J., Feitosa, Yuri Oliveira, Feldpausch, Ted R., Ferreira, Cid, Ferreira, Joice, Ferreira, Leandro Valle, Fletcher, Christine D., Flores, Bernardo Monteiro, Fofanah, Alusine, Foli, Ernest G., Fonty, Émile, Fredriksson, Gabriella M., Fuentes, Alfredo, Galbraith, David, Gallardo Gonzales, George Pepe, Garcia-Cabrera, Karina, García-Villacorta, Roosevelt, Gomes, Vitor H. F., Gómez, Ricardo Zárate, Gonzales, Therany, Gribel, Rogerio, Guedes, Marcelino Carneiro, Guevara, Juan Ernesto, Hakeem, Khalid Rehman, Hall, Jefferson S., Hamer, Keith C., Hamilton, Alan C., Harris, David J., Harrison, Rhett D., Hart, Terese B., Hector, Andy, Henkel, Terry W., Herbohn, John, Hockemba, Mireille B. N., Hoffman, Bruce, Holmgren, Milena, Honorio Coronado, Euridice N., Huamantupa-Chuquimaco, Isau, Hubau, Wannes, Imai, Nobuo, Irume, Mariana Victória, Jansen, Patrick A., Jeffery, Kathryn J., Jimenez, Eliana M., Jucker, Tommaso, Junqueira, André Braga, Kalamandeen, Michelle, Kamdem, Narcisse G., Kartawinata, Kuswata, Kasongo Yakusu, Emmanuel, Katembo, John M., Kearsley, Elizabeth, Kenfack, David, Kessler, Michael, Khaing, Thiri Toe, Killeen, Timothy J., Kitayama, Kanehiro, Klitgaard, Bente, Labrière, Nicolas, Laumonier, Yves, Laurance, Susan G. W., Laurance, William F., Laurent, Félix, Le, Tinh Cong, Le, Trai Trong, Leal, Miguel E., Leão de Moraes Novo, Evlyn Márcia, Levesley, Aurora, Libalah, Moses B., Licona, Juan Carlos, Lima Filho, Diógenes de Andrade, Lindsell, Jeremy A., Lopes, Aline, Lopes, Maria Aparecida, Lovett, Jon C., Lowe, Richard, Lozada, José Rafael, Lu, Xinghui, Luambua, Nestor K., Luize, Bruno Garcia, Maas, Paul, Magalhães, José Leonardo Lima, Magnusson, William E., Mahayani, Ni Putu Diana, Makana, Jean-Remy, Malhi, Yadvinder, Maniguaje Rincón, Lorena, Mansor, Asyraf, Manzatto, Angelo Gilberto, Marimon, Beatriz S., Marimon-Junior, Ben Hur, Marshall, Andrew R, Martins, Maria Pires, Mbayu, Faustin M., de Medeiros, Marcelo Brilhante, Mesones, Italo, Metali, Faizah, Mihindou, Vianet, Millet, Jerome, Milliken, William, Mogollón, Hugo F., Molino, Jean-François, Mohd. Said, Mohd. Nizam, Monteagudo Mendoza, Abel, Montero, Juan Carlos, Moore, Sam, Mostacedo, Bonifacio, Mozombite Pinto, Linder Felipe, Mukul, Sharif Ahmed, Munishi, Pantaleo K. T., Nagamasu, Hidetoshi, Nascimento, Henrique Eduardo Mendonça, Nascimento, Marcelo Trindade, Neill, David, Nilus, Reuben, Noronha, Janaína Costa, Nsenga, Laurent, Núñez Vargas, Percy, Ojo, Lucas, Oliveira, Alexandre A., de Oliveira, Edmar Almeida, Ondo, Fidèle Evouna, Palacios Cuenca, Walter, Pansini, Susamar, Pansonato, Marcelo Petratti, Paredes, Marcos Ríos, Paudel, Ekananda, Pauletto, Daniela, Pearson, Richard G., Pena, José Luis Marcelo, Pennington, R. Toby, Peres, Carlos A., Permana, Andrea, Petronelli, Pascal, Peñuela Mora, Maria Cristina, Phillips, Juan Fernando, Phillips, Oliver L., Pickavance, Georgia, Piedade, Maria Teresa Fernandez, Pitman, Nigel C. A., Ploton, Pierre, Popelier, Andreas, Poulsen, John R., Prieto, Adriana, Primack, Richard B., Priyadi, Hari, Qie, Lan, Quaresma, Adriano Costa, de Queiroz, Helder Lima, Ramirez-Angulo, Hirma, Ramos, José Ferreira, Reis, Neidiane Farias Costa, Reitsma, Jan, Revilla, Juan David Cardenas, Riutta, Terhi, Rivas-Torres, Gonzalo, Robiansyah, Iyan, Rocha, Maira, Rodrigues, Domingos de Jesus, Rodriguez-Ronderos, M. Elizabeth, Rovero, Francesco, Rozak, Andes H., Rudas, Agustín, Rutishauser, Ervan, Sabatier, Daniel, Sagang, Le Bienfaiteur, Sampaio, Adeilza Felipe, Samsoedin, Ismayadi, Satdichanh, Manichanh, Schietti, Juliana, Schöngart, Jochen, Scudeller, Veridiana Vizoni, Seuaturien, Naret, Sheil, Douglas, Sierra, Rodrigo, Silman, Miles R., Silva, Thiago Sanna Freire, da Silva Guimarães, José Renan, Simo-Droissart, Murielle, Simon, Marcelo Fragomeni, Sist, Plinio, Sousa, Thaiane R., de Sousa Farias, Emanuelle, de Souza Coelho, Luiz, Spracklen, Dominick V., Stas, Suzanne M., Steinmetz, Robert, Stevenson, Pablo R., Stropp, Juliana, Sukri, Rahayu S., Sunderland, Terry C. H., Suzuki, Eizi, Swaine, Michael D., Tang, Jianwei, Taplin, James, Taylor, David M., Tello, J. Sebastián, Terborgh, John, Texier, Nicolas, Theilade, Ida, Thomas, Duncan W., Thomas, Raquel, Thomas, Sean C., Tirado, Milton, Toirambe, Benjamin, de Toledo, José Julio, Tomlinson, Kyle W., Torres-Lezama, Armando, Tran, Hieu Dang, Tshibamba Mukendi, John, Tumaneng, Roven D., Umaña, Maria Natalia, Umunay, Peter M., Urrego Giraldo, Ligia Estela, Valderrama Sandoval, Elvis H., Valenzuela Gamarra, Luis, Van Andel, Tinde R., van de Bult, Martin, van de Pol, Jaqueline, van der Heijden, Geertje, Vasquez, Rodolfo, Vela, César I. A., Venticinque, Eduardo Martins, Verbeeck, Hans, Veridiano, Rizza Karen A., Vicentini, Alberto, Vieira, Ima Célia Guimarães, Vilanova Torre, Emilio, Villarroel, Daniel, Villa Zegarra, Boris Eduardo, Vleminckx, Jason, von Hildebrand, Patricio, Vos, Vincent Antoine, Vriesendorp, Corine, Webb, Edward L., White, Lee J. T., Wich, Serge, Wittmann, Florian, Zagt, Roderick, Zang, Runguo, Zartman, Charles Eugene, Zemagho, Lise, Zent, Egleé L., and Zent, Stanford

Published
2024
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4. Tallo: A global tree allometry and crown architecture database

Author

Jucker, Tommaso, Fischer, Fabian Jörg, Chave, Jérôme, Coomes, David A, Caspersen, John, Ali, Arshad, Panzou, Grace Jopaul Loubota, Feldpausch, Ted R, Falster, Daniel, Usoltsev, Vladimir A, Adu‐Bredu, Stephen, Alves, Luciana F, Aminpour, Mohammad, Angoboy, Ilondea B, Anten, Niels PR, Antin, Cécile, Askari, Yousef, Muñoz, Rodrigo, Ayyappan, Narayanan, Balvanera, Patricia, Banin, Lindsay, Barbier, Nicolas, Battles, John J, Beeckman, Hans, Bocko, Yannick E, Bond‐Lamberty, Ben, Bongers, Frans, Bowers, Samuel, Brade, Thomas, Breugel, Michiel, Chantrain, Arthur, Chaudhary, Rajeev, Dai, Jingyu, Dalponte, Michele, Dimobe, Kangbéni, Domec, Jean‐Christophe, Doucet, Jean‐Louis, Duursma, Remko A, Enríquez, Moisés, Ewijk, Karin Y, Farfán‐Rios, William, Fayolle, Adeline, Forni, Eric, Forrester, David I, Gilani, Hammad, Godlee, John L, Gourlet‐Fleury, Sylvie, Haeni, Matthias, Hall, Jefferson S, He, Jie‐Kun, Hemp, Andreas, Hernández‐Stefanoni, José L, Higgins, Steven I, Holdaway, Robert J, Hussain, Kiramat, Hutley, Lindsay B, Ichie, Tomoaki, Iida, Yoshiko, Jiang, Hai‐sheng, Joshi, Puspa Raj, Kaboli, Hasan, Larsary, Maryam Kazempour, Kenzo, Tanaka, Kloeppel, Brian D, Kohyama, Takashi, Kunwar, Suwash, Kuyah, Shem, Kvasnica, Jakub, Lin, Siliang, Lines, Emily R, Liu, Hongyan, Lorimer, Craig, Loumeto, Jean‐Joël, Malhi, Yadvinder, Marshall, Peter L, Mattsson, Eskil, Matula, Radim, Meave, Jorge A, Mensah, Sylvanus, Mi, Xiangcheng, Momo, Stéphane, Moncrieff, Glenn R, Mora, Francisco, Nissanka, Sarath P, O'Hara, Kevin L, Pearce, Steven, Pelissier, Raphaël, Peri, Pablo L, Ploton, Pierre, Poorter, Lourens, Pour, Mohsen Javanmiri, Pourbabaei, Hassan, Dupuy‐Rada, Juan Manuel, Ribeiro, Sabina C, Ryan, Casey, Sanaei, Anvar, Sanger, Jennifer, Schlund, Michael, Sellan, Giacomo, and Shenkin, Alexander

Subjects
Life on Land, Biomass, Carbon, Carbon Cycle, Ecosystem, Forests, Trees, allometric scaling, crown radius, forest biomass stocks, forest ecology, remote sensing, stem diameter, tree height, Environmental Sciences, Biological Sciences, Ecology
Abstract

Data capturing multiple axes of tree size and shape, such as a tree's stem diameter, height and crown size, underpin a wide range of ecological research-from developing and testing theory on forest structure and dynamics, to estimating forest carbon stocks and their uncertainties, and integrating remote sensing imagery into forest monitoring programmes. However, these data can be surprisingly hard to come by, particularly for certain regions of the world and for specific taxonomic groups, posing a real barrier to progress in these fields. To overcome this challenge, we developed the Tallo database, a collection of 498,838 georeferenced and taxonomically standardized records of individual trees for which stem diameter, height and/or crown radius have been measured. These data were collected at 61,856 globally distributed sites, spanning all major forested and non-forested biomes. The majority of trees in the database are identified to species (88%), and collectively Tallo includes data for 5163 species distributed across 1453 genera and 187 plant families. The database is publicly archived under a CC-BY 4.0 licence and can be access from: https://doi.org/10.5281/zenodo.6637599. To demonstrate its value, here we present three case studies that highlight how the Tallo database can be used to address a range of theoretical and applied questions in ecology-from testing the predictions of metabolic scaling theory, to exploring the limits of tree allometric plasticity along environmental gradients and modelling global variation in maximum attainable tree height. In doing so, we provide a key resource for field ecologists, remote sensing researchers and the modelling community working together to better understand the role that trees play in regulating the terrestrial carbon cycle.

Published
2022

5. Aboveground biomass density models for NASA’s Global Ecosystem Dynamics Investigation (GEDI) lidar mission

Author

Duncanson, Laura, Kellner, James R, Armston, John, Dubayah, Ralph, Minor, David M, Hancock, Steven, Healey, Sean P, Patterson, Paul L, Saarela, Svetlana, Marselis, Suzanne, Silva, Carlos E, Bruening, Jamis, Goetz, Scott J, Tang, Hao, Hofton, Michelle, Blair, Bryan, Luthcke, Scott, Fatoyinbo, Lola, Abernethy, Katharine, Alonso, Alfonso, Andersen, Hans-Erik, Aplin, Paul, Baker, Timothy R, Barbier, Nicolas, Bastin, Jean Francois, Biber, Peter, Boeckx, Pascal, Bogaert, Jan, Boschetti, Luigi, Boucher, Peter Brehm, Boyd, Doreen S, Burslem, David FRP, Calvo-Rodriguez, Sofia, Chave, Jérôme, Chazdon, Robin L, Clark, David B, Clark, Deborah A, Cohen, Warren B, Coomes, David A, Corona, Piermaria, Cushman, KC, Cutler, Mark EJ, Dalling, James W, Dalponte, Michele, Dash, Jonathan, de-Miguel, Sergio, Deng, Songqiu, Ellis, Peter Woods, Erasmus, Barend, Fekety, Patrick A, Fernandez-Landa, Alfredo, Ferraz, Antonio, Fischer, Rico, Fisher, Adrian G, García-Abril, Antonio, Gobakken, Terje, Hacker, Jorg M, Heurich, Marco, Hill, Ross A, Hopkinson, Chris, Huang, Huabing, Hubbell, Stephen P, Hudak, Andrew T, Huth, Andreas, Imbach, Benedikt, Jeffery, Kathryn J, Katoh, Masato, Kearsley, Elizabeth, Kenfack, David, Kljun, Natascha, Knapp, Nikolai, Král, Kamil, Krůček, Martin, Labrière, Nicolas, Lewis, Simon L, Longo, Marcos, Lucas, Richard M, Main, Russell, Manzanera, Jose A, Martínez, Rodolfo Vásquez, Mathieu, Renaud, Memiaghe, Herve, Meyer, Victoria, Mendoza, Abel Monteagudo, Monerris, Alessandra, Montesano, Paul, Morsdorf, Felix, Næsset, Erik, Naidoo, Laven, Nilus, Reuben, O’Brien, Michael, Orwig, David A, Papathanassiou, Konstantinos, Parker, Geoffrey, Philipson, Christopher, Phillips, Oliver L, Pisek, Jan, Poulsen, John R, Pretzsch, Hans, and Rüdiger, Christoph

Subjects
Earth Sciences, LiDAR, GEDI, Waveform, Forest, Aboveground biomass, Modeling, Physical Geography and Environmental Geoscience, Geomatic Engineering, Geological & Geomatics Engineering, Earth sciences
Abstract

NASA's Global Ecosystem Dynamics Investigation (GEDI) is collecting spaceborne full waveform lidar data with a primary science goal of producing accurate estimates of forest aboveground biomass density (AGBD). This paper presents the development of the models used to create GEDI's footprint-level (~25 m) AGBD (GEDI04_A) product, including a description of the datasets used and the procedure for final model selection. The data used to fit our models are from a compilation of globally distributed spatially and temporally coincident field and airborne lidar datasets, whereby we simulated GEDI-like waveforms from airborne lidar to build a calibration database. We used this database to expand the geographic extent of past waveform lidar studies, and divided the globe into four broad strata by Plant Functional Type (PFT) and six geographic regions. GEDI's waveform-to-biomass models take the form of parametric Ordinary Least Squares (OLS) models with simulated Relative Height (RH) metrics as predictor variables. From an exhaustive set of candidate models, we selected the best input predictor variables, and data transformations for each geographic stratum in the GEDI domain to produce a set of comprehensive predictive footprint-level models. We found that model selection frequently favored combinations of RH metrics at the 98th, 90th, 50th, and 10th height above ground-level percentiles (RH98, RH90, RH50, and RH10, respectively), but that inclusion of lower RH metrics (e.g. RH10) did not markedly improve model performance. Second, forced inclusion of RH98 in all models was important and did not degrade model performance, and the best performing models were parsimonious, typically having only 1-3 predictors. Third, stratification by geographic domain (PFT, geographic region) improved model performance in comparison to global models without stratification. Fourth, for the vast majority of strata, the best performing models were fit using square root transformation of field AGBD and/or height metrics. There was considerable variability in model performance across geographic strata, and areas with sparse training data and/or high AGBD values had the poorest performance. These models are used to produce global predictions of AGBD, but will be improved in the future as more and better training data become available.

Published
2022

7. Pantropical variability in tree crown allometry

Author

Panzou, Grace Jopaul Loubota, Fayolle, Adeline, Jucker, Tommaso, Phillips, Oliver L, Bohlman, Stephanie, Banin, Lindsay F, Lewis, Simon L, Affum‐Baffoe, Kofi, Alves, Luciana F, Antin, Cécile, Arets, Eric, Arroyo, Luzmila, Baker, Timothy R, Barbier, Nicolas, Beeckman, Hans, Berger, Uta, Bocko, Yannick Enock, Bongers, Frans, Bowers, Sam, Brade, Thom, Brondizio, Eduardo S, Chantrain, Arthur, Chave, Jerome, Compaore, Halidou, Coomes, David, Diallo, Adama, Dias, Arildo S, Dimobe, Kangbéni, Djagbletey, Gloria Djaney, Domingues, Tomas, Doucet, Jean‐Louis, Drouet, Thomas, Forni, Eric, Godlee, John L, Goodman, Rosa C, Gourlet‐Fleury, Sylvie, Hien, Fidele, Iida, Yoshiko, Ilondea, Bhely Angoboy, Muledi, Jonathan Ilunga, Jacques, Pierre, Kuyah, Shem, López‐Portillo, Jorge, Loumeto, Jean Joël, Marimon‐Junior, Ben Hur, Marimon, Beatriz Schwantes, Mensah, Sylvanus, Mitchard, Edward TA, Moncrieff, Glenn R, Narayanan, Ayyappan, O’Brien, Sean T, Ouedraogo, Korotimi, Palace, Michael W, Pelissier, Raphael, Ploton, Pierre, Poorter, Lourens, Ryan, Casey M, Saiz, Gustavo, Santos, Karin, Schlund, Michael, Sellan, Giacomo, Sonke, Bonaventure, Sterck, Frank, Thibaut, Quentin, Van Hoef, Yorick, Veenendaal, Elmar, Vovides, Alejandra G, Xu, Yaozhan, Yao, Tze Leong, and Feldpausch, Ted R

Subjects
Environmental Sciences, Ecological Applications, Environmental Management, crown allometry, environment, forest, precipitation, savanna, soil, stand&#8208, level variable, tropical biomes, Ecology
Abstract

Aim: Tree crowns determine light interception, carbon and water exchange. Thus, understanding the factors causing tree crown allometry to vary at the tree and stand level matters greatly for the development of future vegetation modelling and for the calibration of remote sensing products. Nevertheless, we know little about large-scale variation and determinants in tropical tree crown allometry. In this study, we explored the continental variation in scaling exponents of site-specific crown allometry and assessed their relationships with environmental and stand-level variables in the tropics. Location: Global tropics. Time period: Early 21st century. Major taxa studied: Woody plants. Methods: Using a dataset of 87,737 trees distributed among 245 forest and savanna sites across the tropics, we fitted site-specific allometric relationships between crown dimensions (crown depth, diameter and volume) and stem diameter using power-law models. Stand-level and environmental drivers of crown allometric relationships were assessed at pantropical and continental scales. Results: The scaling exponents of allometric relationships between stem diameter and crown dimensions were higher in savannas than in forests. We identified that continental crown models were better than pantropical crown models and that continental differences in crown allometric relationships were driven by both stand-level (wood density) and environmental (precipitation, cation exchange capacity and soil texture) variables for both tropical biomes. For a given diameter, forest trees from Asia and savanna trees from Australia had smaller crown dimensions than trees in Africa and America, with crown volumes for some Asian forest trees being smaller than those of trees in African forests. Main conclusions: Our results provide new insight into geographical variability, with large continental differences in tropical tree crown allometry that were driven by stand-level and environmental variables. They have implications for the assessment of ecosystem function and for the monitoring of woody biomass by remote sensing techniques in the global tropics.

Published
2021

13. The NASA AfriSAR campaign: Airborne SAR and lidar measurements of tropical forest structure and biomass in support of current and future space missions

Author

Fatoyinbo, Temilola, Armston, John, Simard, Marc, Saatchi, Sassan, Denbina, Michael, Lavalle, Marco, Hofton, Michelle, Tang, Hao, Marselis, Suzanne, Pinto, Naiara, Hancock, Steven, Hawkins, Brian, Duncanson, Laura, Blair, Bryan, Hansen, Christy, Lou, Yunling, Dubayah, Ralph, Hensley, Scott, Silva, Carlos, Poulsen, John R., Labrière, Nicolas, Barbier, Nicolas, Jeffery, Kathryn, Kenfack, David, Herve, Memiaghe, Bissiengou, Pulchérie, Alonso, Alfonso, Moussavou, Ghislain, White, Lee T.J., Lewis, Simon, and Hibbard, Kathleen

Published
2021
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14. Allometric equations for integrating remote sensing imagery into forest monitoring programmes

Author

Jucker, Tommaso, Caspersen, John, Chave, Jérôme, Antin, Cécile, Barbier, Nicolas, Bongers, Frans, Dalponte, Michele, Ewijk, Karin Y, Forrester, David I, Haeni, Matthias, Higgins, Steven I, Holdaway, Robert J, Iida, Yoshiko, Lorimer, Craig, Marshall, Peter L, Momo, Stéphane, Moncrieff, Glenn R, Ploton, Pierre, Poorter, Lourens, Rahman, Kassim Abd, Schlund, Michael, Sonké, Bonaventure, Sterck, Frank J, Trugman, Anna T, Usoltsev, Vladimir A, Vanderwel, Mark C, Waldner, Peter, Wedeux, Beatrice MM, Wirth, Christian, Wöll, Hannsjörg, Woods, Murray, Xiang, Wenhua, Zimmermann, Niklaus E, and Coomes, David A

Subjects
Environmental Sciences, Life on Land, Biomass, Carbon, Carbon Cycle, Forests, Remote Sensing Technology, Trees, aboveground biomass, airborne laser scanning, carbon mapping, crown architecture, height-diameter allometry, stem diameter distributions, Biological Sciences, Ecology, Biological sciences, Earth sciences, Environmental sciences
Abstract

Remote sensing is revolutionizing the way we study forests, and recent technological advances mean we are now able - for the first time - to identify and measure the crown dimensions of individual trees from airborne imagery. Yet to make full use of these data for quantifying forest carbon stocks and dynamics, a new generation of allometric tools which have tree height and crown size at their centre are needed. Here, we compile a global database of 108753 trees for which stem diameter, height and crown diameter have all been measured, including 2395 trees harvested to measure aboveground biomass. Using this database, we develop general allometric models for estimating both the diameter and aboveground biomass of trees from attributes which can be remotely sensed - specifically height and crown diameter. We show that tree height and crown diameter jointly quantify the aboveground biomass of individual trees and find that a single equation predicts stem diameter from these two variables across the world's forests. These new allometric models provide an intuitive way of integrating remote sensing imagery into large-scale forest monitoring programmes and will be of key importance for parameterizing the next generation of dynamic vegetation models.

Published
2017

15. Unveiling African rainforest composition and vulnerability to global change

Author

Réjou-Méchain, Maxime, Mortier, Frédéric, Bastin, Jean-François, Cornu, Guillaume, Barbier, Nicolas, Bayol, Nicolas, Bénédet, Fabrice, Bry, Xavier, Dauby, Gilles, Deblauwe, Vincent, Doucet, Jean-Louis, Doumenge, Charles, Fayolle, Adeline, Garcia, Claude, Kibambe Lubamba, Jean-Paul, Loumeto, Jean-Joël, Ngomanda, Alfred, Ploton, Pierre, Sonké, Bonaventure, Trottier, Catherine, Vimal, Ruppert, Yongo, Olga, Pélissier, Raphaël, and Gourlet-Fleury, Sylvie

Published
2021
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17. KDM6B drives epigenetic reprogramming associated with lymphoid stromal cell early commitment and immune properties

Author

Sylvestre, Marvin, primary, Barbier, Nicolas, additional, Sibut, Vonick, additional, Nayar, Saba, additional, Monvoisin, Céline, additional, Leonard, Simon, additional, Saint-Vanne, Julien, additional, Martin, Ansie, additional, Guirriec, Marion, additional, Latour, Maëlle, additional, Jouan, Florence, additional, Baulande, Sylvain, additional, Bohec, Mylène, additional, Verdière, Léa, additional, Mechta-Grigoriou, Fatima, additional, Mourcin, Frédéric, additional, Bertheuil, Nicolas, additional, Barone, Francesca, additional, Tarte, Karin, additional, and Roulois, David, additional

Published
2023
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18. Pan-tropical prediction of forest structure from the largest trees

Author

Bastin, Jean-François, Rutishauser, Ervan, Kellner, James R., Saatchi, Sassan, Pélissier, Raphael, Hérault, Bruno, Slik, Ferry, Bogaert, Jan, De Cannière, Charles, Marshall, Andrew R., Poulsen, John, Alvarez-Loyayza, Patricia, Andrade, Ana, Angbonga-Basia, Albert, Araujo-Murakami, Alejandro, Arroyo, Luzmila, Ayyappan, Narayanan, de Azevedo, Celso Paulo, Banki, Olaf, Barbier, Nicolas, Barroso, Jorcely G., Beeckman, Hans, Bitariho, Robert, Boeckx, Pascal, Boehning-Gaese, Katrin, Brandão, Hilandia, Brearley, Francis Q., Hockemba, Mireille Breuer Ndoundou, Brienen, Roel, Camargo, Jose Luis C., Campos-Arceiz, Ahimsa, Cassart, Benoit, Chave, Jérôme, Chazdon, Robin, Chuyong, Georges, Clark, David B., Clark, Connie J., Condit, Richard, Coronado, Euridice N. Honorio, Davidar, Priya, de Haulleville, Thalès, Descroix, Laurent, Doucet, Jean-Louis, Dourdain, Aurelie, Droissart, Vincent, Duncan, Thomas, Espejo, Javier Silva, Espinosa, Santiago, Farwig, Nina, Fayolle, Adeline, Feldpausch, Ted R., Ferraz, Antonio, Fletcher, Christine, Gajapersad, Krisna, Gillet, Jean-François, do Amaral, Iêda Leão, Gonmadje, Christelle, Grogan, James, Harris, David, Herzog, Sebastian K., Homeier, Jürgen, Hubau, Wannes, Hubbell, Stephen P., Hufkens, Koen, Hurtado, Johanna, Kamdem, Narcisse G., Kearsley, Elizabeth, Kenfack, David, Kessler, Michael, Labrière, Nicolas, Laumonier, Yves, Laurance, Susan, Laurance, William F., Lewis, Simon L., Libalah, Moses B., Ligot, Gauthier, Lloyd, Jon, Lovejoy, Thomas E., Malhi, Yadvinder, Marimon, Beatriz S., Junior, Ben Hur Marimon, Martin, Emmanuel H., Matius, Paulus, Meyer, Victoria, Bautista, Casimero Mendoza, Monteagudo-Mendoza, Abel, Mtui, Arafat, Neill, David, Gutierrez, Germaine Alexander Parada, Pardo, Guido, Parren, Marc, Parthasarathy, N., Phillips, Oliver L., Pitman, Nigel C. A., Ploton, Pierre, Ponette, Quentin, Ramesh, B. R., Razafimahaimodison, Jean-Claude, Réjou-Méchain, Maxime, Rolim, Samir Gonçalves, Saltos, Hugo Romero, Rossi, Luiz Marcelo Brum, Spironello, Wilson Roberto, Rovero, Francesco, Saner, Philippe, Sasaki, Denise, Schulze, Mark, Silveira, Marcos, Singh, James, Sist, Plinio, Sonke, Bonaventure, Soto, J. Daniel, de Souza, Cintia Rodrigues, Stropp, Juliana, Sullivan, Martin J. P., Swanepoel, Ben, ter Steege, Hans, Terborgh, John, Texier, Nicolas, Toma, Takeshi, Valencia, Renato, Valenzuela, Luis, Ferreira, Leandro Valle, Valverde, Fernando Cornejo, Van Andel, Tinde R., Vasque, Rodolfo, Verbeeck, Hans, Vivek, Pandi, Vleminckx, Jason, Vos, Vincent A., Wagner, Fabien H., Papi Puspa, Warsudi, Wortel, Verginia, Zagt, Roderick J., and Zebaze, Donatien

Published
2018

19. Short-term androgen deprivation therapy combined with radiotherapy as salvage treatment after radical prostatectomy for prostate cancer (GETUG-AFU 16): a 112-month follow-up of a phase 3, randomised trial

Author

Carrie, Christian, Magné, Nicolas, Burban-Provost, Patricia, Sargos, Paul, Latorzeff, Igor, Lagrange, Jean-Léon, Supiot, Stéphane, Belkacemi, Yazid, Peiffert, Didier, Allouache, Nedla, Dubray, Bernard M, Servagi-Vernat, Stéphanie, Suchaud, Jean-Philippe, Crehange, Gilles, Guerif, Stéphane, Brihoum, Meryem, Barbier, Nicolas, Graff-Cailleaud, Pierre, Ruffion, Alain, Dussart, Sophie, Ferlay, Céline, and Chabaud, Sylvie

Published
2019
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22. A map of African humid tropical forest aboveground biomass derived from management inventories

Author

Ploton, Pierre, Mortier, Frédéric, Barbier, Nicolas, Cornu, Guillaume, Réjou-Méchain, Maxime, Rossi, Vivien, Alonso, Alfonso, Bastin, Jean-François, Bayol, Nicolas, Bénédet, Fabrice, Bissiengou, Pulchérie, Chuyong, Georges, Demarquez, Benoît, Doucet, Jean-Louis, Droissart, Vincent, Kamdem, Narcisse Guy, Kenfack, David, Memiaghe, Hervé, Moses, Libalah, Sonké, Bonaventure, Texier, Nicolas, Thomas, Duncan, Zebaze, Donatien, Pélissier, Raphaël, and Gourlet-Fleury, Sylvie

Published
2020
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27. Virus persistence in pig herds led to successive reassortment events between swine and human influenza A viruses, resulting in the emergence of a novel triple-reassortant swine influenza virus

Author

Chastagner, Amélie, Bonin, Emilie, Fablet, Christelle, Quéguiner, Stéphane, Hirchaud, Edouard, Lucas, Pierrick, Gorin, Stéphane, Barbier, Nicolas, Béven, Véronique, Garin, Emmanuel, Blanchard, Yannick, Rose, Nicolas, Hervé, Séverine, and Simon, Gaëlle

Published
2019
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28. Natural Regeneration In Tropical Forests Along A Disturbance Gradient In South-East Cameroon

Author

Zebaze, Donatien Dongmo, primary, Gorel, Anaïs, additional, Gillet, Jean-François, additional, Houngbégnon, Fructueux, additional, Barbier, Nicolas, additional, Ligot, Gauthier, additional, Lhoest, Simon, additional, Kamdem, Gyslene, additional, Libalah, Moses, additional, Droissart, Vincent, additional, Sonké, Bonaventure, additional, and Doucet, Jean-Louis, additional

Published
2023
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29. Salvage radiotherapy with or without short-term hormone therapy for rising prostate-specific antigen concentration after radical prostatectomy (GETUG-AFU 16): a randomised, multicentre, open-label phase 3 trial

Author

Carrie, Christian, Hasbini, Ali, de Laroche, Guy, Richaud, Pierre, Guerif, Stéphane, Latorzeff, Igor, Supiot, Stéphane, Bosset, Mathieu, Lagrange, Jean-Léon, Beckendorf, Véronique, Lesaunier, François, Dubray, Bernard, Wagner, Jean-Philippe, N'Guyen, Tan Dat, Suchaud, Jean-Philippe, Créhange, Gilles, Barbier, Nicolas, Habibian, Muriel, Ferlay, Céline, Fourneret, Philippe, Ruffion, Alain, and Dussart, Sophie

Published
2016
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30. UAV-Lidar reveals that canopy structure mediates the influence of edge effects on forest diversity, function and microclimate

Author

Blanchard, Grégoire, Barbier, Nicolas, Vieilledent, Ghislain, Ibanez, Thomas, Hequet, Vanessa, McCoy, Stéphane, and Birnbaum, Philippe

Abstract

Widespread forest loss and fragmentation dramatically increases the proportion of forest areas located close to edges. Although detrimental, the precise extent and mechanisms by which edge proximity impacts remnant forests remain to be ascertained. By combining unmanned aerial vehicle laser scanning (UAV-LS) with field data from 46 plots distributed at varying distances from the edge to the forest interior in a fragmented forest of New-Caledonia, we investigated edge influence on forest structure, composition, function, above-ground biomass (AGB) and microclimate. Using simple linear regressions, structural equation modelling and variance partitioning, we analysed the direct and indirect relationships between distance to edge, UAV-LS-derived canopy structural metrics, understorey microclimate, AGB, taxonomic and functional composition while accounting for the potential influence of fine-scale variation in topography. We found that the distance to the closest forest edge was strongly correlated with canopy structure and that canopy structure was better correlated to forest composition, function, biomass and microclimate than distance to the closest forest edge. This suggests that the influence of edge is mediated by changes in canopy structure. Plots located near the edge exhibited a lower canopy with more gaps, higher microclimate extremes, lower biomass, lower taxonomic and functional diversity as well as denser wood and lower specific leaf area. UAV-LS-derived canopy structural metrics were relevant predictors of understorey microclimate, biomass and taxonomic and functional composition. Overall, the influence of topography was marginal compared to edge effects. Synthesis. Accounting for fine-scale variation in canopy structure captured by UAV-LS provides insights on the multiple edge impacts on key forest properties related to structure, diversity, function, biomass and microenvironmental conditions. Integrating UAV-LS-derived data can foster our understanding of cascading and interacting impacts of anthropogenic influence on tropical forest ecosystems and should help to improve conservation strategies and landscape management policies.

Published
2023

31. Assessment of Patterns in Ecogeomorphic Systems

Author

Barbier, Nicolas, Bellot, Juan, Couteron, Pierre, Wiegand, Thorsten, Grimm, Volker, Deblauwe, Vincent, Biro, Peter, Mueller, Eva Nora, Mueller, Eva Nora, editor, Wainwright, John, editor, Parsons, Anthony J., editor, and Turnbull, Laura, editor

Published
2014
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33. Resilience, Self-Organization, Complexity and Pattern Formation

Author

Jeltsch, Florian, Turnbull, Laura, Scarsoglio, Stefania, Alados, Concepcion L., Gallart, Francesc, Mueller, Eva Nora, Barbier, Nicolas, Millington, James D. A., Wainwright, John, Wieczorek, Mareike, Grimm, Volker, Mueller, Eva Nora, editor, Wainwright, John, editor, Parsons, Anthony J., editor, and Turnbull, Laura, editor

Published
2014
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38. Allometric options for predicting tropical tree height and crown area from stem diameter

Author

Libalah, Moses B., primary, Fayolle, Adeline, additional, Barbier, Nicolas, additional, Picard, Nicolas, additional, Momo, Stéphane, additional, Bocko, Yannick, additional, Mofack, Gislain II, additional, Katembo, John Mukirania, additional, Loumeto, Joël, additional, Yongo, Olga Diane, additional, Ngomanda, Alfred, additional, Couteron, Pierre, additional, Sonké, Bonaventure, additional, and Vivien, Rossi, additional

Published
2022
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47. Linking Drone and Ground-Based Liana Measurements in a Congolese Forest

Author

Kaçamak, Begüm, primary, Barbier, Nicolas, additional, Aubry-Kientz, Mélaine, additional, Forni, Eric, additional, Gourlet-Fleury, Sylvie, additional, Guibal, Daniel, additional, Loumeto, Jean-Joël, additional, Pollet, Sasha, additional, Rossi, Vivien, additional, Rowe, Nick, additional, van Hoef, Yorick, additional, and Réjou-Méchain, Maxime, additional

Published
2022
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48. Aboveground biomass density models for NASA’s Global Ecosystem Dynamics Investigation (GEDI) lidar mission

Author

Duncanson, Laura, primary, Kellner, James R., additional, Armston, John, additional, Dubayah, Ralph, additional, Minor, David M., additional, Hancock, Steven, additional, Healey, Sean P., additional, Patterson, Paul L., additional, Saarela, Svetlana, additional, Marselis, Suzanne, additional, Silva, Carlos E., additional, Bruening, Jamis, additional, Goetz, Scott J., additional, Tang, Hao, additional, Hofton, Michelle, additional, Blair, Bryan, additional, Luthcke, Scott, additional, Fatoyinbo, Lola, additional, Abernethy, Katharine, additional, Alonso, Alfonso, additional, Andersen, Hans-Erik, additional, Aplin, Paul, additional, Baker, Timothy R., additional, Barbier, Nicolas, additional, Bastin, Jean Francois, additional, Biber, Peter, additional, Boeckx, Pascal, additional, Bogaert, Jan, additional, Boschetti, Luigi, additional, Boucher, Peter Brehm, additional, Boyd, Doreen S., additional, Burslem, David F.R.P., additional, Calvo-Rodriguez, Sofia, additional, Chave, Jérôme, additional, Chazdon, Robin L., additional, Clark, David B., additional, Clark, Deborah A., additional, Cohen, Warren B., additional, Coomes, David A., additional, Corona, Piermaria, additional, Cushman, K.C., additional, Cutler, Mark E.J., additional, Dalling, James W., additional, Dalponte, Michele, additional, Dash, Jonathan, additional, de-Miguel, Sergio, additional, Deng, Songqiu, additional, Ellis, Peter Woods, additional, Erasmus, Barend, additional, Fekety, Patrick A., additional, Fernandez-Landa, Alfredo, additional, Ferraz, Antonio, additional, Fischer, Rico, additional, Fisher, Adrian G., additional, García-Abril, Antonio, additional, Gobakken, Terje, additional, Hacker, Jorg M., additional, Heurich, Marco, additional, Hill, Ross A., additional, Hopkinson, Chris, additional, Huang, Huabing, additional, Hubbell, Stephen P., additional, Hudak, Andrew T., additional, Huth, Andreas, additional, Imbach, Benedikt, additional, Jeffery, Kathryn J., additional, Katoh, Masato, additional, Kearsley, Elizabeth, additional, Kenfack, David, additional, Kljun, Natascha, additional, Knapp, Nikolai, additional, Král, Kamil, additional, Krůček, Martin, additional, Labrière, Nicolas, additional, Lewis, Simon L., additional, Longo, Marcos, additional, Lucas, Richard M., additional, Main, Russell, additional, Manzanera, Jose A., additional, Martínez, Rodolfo Vásquez, additional, Mathieu, Renaud, additional, Memiaghe, Herve, additional, Meyer, Victoria, additional, Mendoza, Abel Monteagudo, additional, Monerris, Alessandra, additional, Montesano, Paul, additional, Morsdorf, Felix, additional, Næsset, Erik, additional, Naidoo, Laven, additional, Nilus, Reuben, additional, O’Brien, Michael, additional, Orwig, David A., additional, Papathanassiou, Konstantinos, additional, Parker, Geoffrey, additional, Philipson, Christopher, additional, Phillips, Oliver L., additional, Pisek, Jan, additional, Poulsen, John R., additional, Pretzsch, Hans, additional, Rüdiger, Christoph, additional, Saatchi, Sassan, additional, Sanchez-Azofeifa, Arturo, additional, Sanchez-Lopez, Nuria, additional, Scholes, Robert, additional, Silva, Carlos A., additional, Simard, Marc, additional, Skidmore, Andrew, additional, Stereńczak, Krzysztof, additional, Tanase, Mihai, additional, Torresan, Chiara, additional, Valbuena, Ruben, additional, Verbeeck, Hans, additional, Vrska, Tomas, additional, Wessels, Konrad, additional, White, Joanne C., additional, White, Lee J.T., additional, Zahabu, Eliakimu, additional, and Zgraggen, Carlo, additional

Published
2022
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49. Scientific Committee

Author

Fouad, Youssef, primary, Carrere, Véronique, additional, Chabrillat, Sabine, additional, Demarez, Valérie, additional, Roujean, Jean Louis, additional, Lacaze, Roselyne, additional, Pattey, Elizabeth, additional, Kayitakire, Francois, additional, Ceschia, Eric, additional, Brunet, Yves, additional, Sheeren, David, additional, Vaudour, Emmanuelle, additional, Alleaume, Samuel, additional, Bappel, Eric, additional, Corgne, Samuel, additional, Arvor, Damien, additional, Catry, Thibault, additional, Rudant, Jean-Paul, additional, Gaetano, Raffaele, additional, Mougin, Eric, additional, Weiss, Marie, additional, Michez, Adrien, additional, Bauwens, Sébastien, additional, Bonnet, Stéphanie, additional, Lejeune, Philippe, additional, Belouard, Thierry, additional, Barbier, Nicolas, additional, Rejou, Maxime, additional, Vincent, Grégoire, additional, Baghdadi, Nicolas, additional, and Zribi, Mehrez, additional

Published
2016
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