4 results on '"Lindsell J.A."'
Search Results
2. Aboveground forest biomass varies across continents, ecological zones and successional stages: refined IPCC default values for tropical and subtropical forests
- Author
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Danaë M A Rozendaal, Daniela Requena Suarez, Veronique De Sy, Valerio Avitabile, Sarah Carter, C Y Adou Yao, Esteban Alvarez-Davila, Kristina Anderson-Teixeira, Alejandro Araujo-Murakami, Luzmila Arroyo, Benjamin Barca, Timothy R Baker, Luca Birigazzi, Frans Bongers, Anne Branthomme, Roel J W Brienen, João M B Carreiras, Roberto Cazzolla Gatti, Susan C Cook-Patton, Mathieu Decuyper, Ben DeVries, Andres B Espejo, Ted R Feldpausch, Julian Fox, Javier G P Gamarra, Bronson W Griscom, Nancy Harris, Bruno Hérault, Eurídice N Honorio Coronado, Inge Jonckheere, Eric Konan, Sara M Leavitt, Simon L Lewis, Jeremy A Lindsell, Justin Kassi N’Dja, Anny Estelle N’Guessan, Beatriz Marimon, Edward T A Mitchard, Abel Monteagudo, Alexandra Morel, Anssi Pekkarinen, Oliver L Phillips, Lourens Poorter, Lan Qie, Ervan Rutishauser, Casey M Ryan, Maurizio Santoro, Dos Santos Silayo, Plinio Sist, J W Ferry Slik, Bonaventure Sonké, Martin J P Sullivan, Gaia Vaglio Laurin, Emilio Vilanova, Maria M H Wang, Eliakimu Zahabu, Martin Herold, Rozendaal D.M.A., Requena Suarez D., De Sy V., Avitabile V., Carter S., Adou Yao C.Y., Alvarez-Davila E., Anderson-Teixeira K., Araujo-Murakami A., Arroyo L., Barca B., Baker T.R., Birigazzi L., Bongers F., Branthomme A., Brienen R.J.W., Carreiras J.M.B., Cazzolla Gatti R., Cook-Patton S.C., Decuyper M., Devries B., Espejo A.B., Feldpausch T.R., Fox J., G P Gamarra J., Griscom B.W., Harris N., Herault B., Honorio Coronado E.N., Jonckheere I., Konan E., Leavitt S.M., Lewis S.L., Lindsell J.A., N'Dja J.K., N'Guessan A.E., Marimon B., Mitchard E.T.A., Monteagudo A., Morel A., Pekkarinen A., Phillips O.L., Poorter L., Qie L., Rutishauser E., Ryan C.M., Santoro M., Silayo D.S., Sist P., Slik J.W.F., Sonke B., Sullivan M.J.P., Vaglio Laurin G., Vilanova E., Wang M.M.H., Zahabu E., Herold M., and University of St Andrews. School of Geography & Sustainable Development
- Subjects
0106 biological sciences ,010504 meteorology & atmospheric sciences ,Suivi et d’évaluation ,forest plot ,forêt tropicale ,E-DAS ,Tropical and subtropical forests ,7. Clean energy ,01 natural sciences ,biomasse aérienne des arbres ,Laboratory of Geo-information Science and Remote Sensing ,Environmental Science(all) ,надземная биомасса ,SDG 13 - Climate Action ,старовозрастные леса ,General Environmental Science ,GE ,Enquête ,IPCC ,tropical and subtropical forests ,Aboveground biomass ,PE&RC ,Forest plots ,secondary and old-growth forest ,Plant Production Systems ,aboveground bioma ,Collecte de données ,P01 - Conservation de la nature et ressources foncières ,Crop and Weed Ecology ,aboveground biomass ,GE Environmental Sciences ,Monitoring ,тропические леса ,Secondary and old-growth forests ,010603 evolutionary biology ,Objectif 13 Mesures relatives à la lutte contre les changements climatique ,лесные участки ,forest plots ,SDG 3 - Good Health and Well-being ,вторичные леса ,forêt primaire ,Bosecologie en Bosbeheer ,Laboratorium voor Geo-informatiekunde en Remote Sensing ,SDG 7 - Affordable and Clean Energy ,0105 earth and related environmental sciences ,MCC ,Renewable Energy, Sustainability and the Environment ,Public Health, Environmental and Occupational Health ,субтропические леса ,15. Life on land ,Forest Ecology and Forest Management ,K10 - Production forestière ,secondary and old-growth forests ,monitoring ,13. Climate action ,Plantaardige Productiesystemen ,forêt secondaire - Abstract
Funding: We acknowledge funding from the following organizations: Norwegian Agency for Development Cooperation (Norad); Norwegian International Climate and Forest Initiative (NICFI); International Climate Initiative (IKI) of the German; Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety (BMUB); CGIAR Research Program on Forests, Trees and Agroforestry (CRP‐FTA) with financial support from the CGIAR Fund Donors; EU Horizon 2020 project VERIFY (776810); European Space Agency GlobBiomass project (ESRIN Contract No. 4000113100/14/I-NB); European Research Council (ERC) Advanced Grants T-FORCES (291585) and PANTROP (834775); JAXA (RA-6, EO-RA2); UK Natural Environment Research Council (NERC; including NE/F005806/, NE/D005590/1, NE/T01279X/1, NE/P008755/1 and NE/N012542/1); agreement PR140015 between NERC and the National Centre for Earth Observation; Gordon and Betty Moore Foundation; CNPq (National Council of Science and Technology, Brazil), Grants #401279/2014‐4 (PVE) and #441244/2016‐5 (PELD); Doris Duke Charitable Foundation; the Children's Investment 309 Fund Foundation; COmON Foundation and Good Energies Foundation. For monitoring and reporting forest carbon stocks and fluxes, many countries in the tropics and subtropics rely on default values of forest aboveground biomass (AGB) from the Intergovernmental Panel on Climate Change (IPCC) guidelines for National Greenhouse Gas (GHG) Inventories. Default IPCC forest AGB values originated from 2006, and are relatively crude estimates of average values per continent and ecological zone. The 2006 default values were based on limited plot data available at the time, methods for their derivation were not fully clear, and no distinction between successional stages was made. As part of the 2019 Refinement to the 2006 IPCC Guidelines for GHG Inventories, we updated the default AGB values for tropical and subtropical forests based on AGB data from >25 000 plots in natural forests and a global AGB map where no plot data were available. We calculated refined AGB default values per continent, ecological zone, and successional stage, and provided a measure of uncertainty. AGB in tropical and subtropical forests varies by an order of magnitude across continents, ecological zones, and successional stage. Our refined default values generally reflect the climatic gradients in the tropics, with more AGB in wetter areas. AGB is generally higher in old-growth than in secondary forests, and higher in older secondary (regrowth >20 years old and degraded/logged forests) than in young secondary forests (20 years old). While refined default values for tropical old-growth forest are largely similar to the previous 2006 default values, the new default values are 4.0-7.7-fold lower for young secondary forests. Thus, the refined values will strongly alter estimated carbon stocks and fluxes, and emphasize the critical importance of old-growth forest conservation. We provide a reproducible approach to facilitate future refinements and encourage targeted efforts to establish permanent plots in areas with data gaps. Publisher PDF
- Published
- 2022
3. An integrated pan-tropical biomass map using multiple reference datasets
- Author
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Hans Verbeeck, Slik J.W. Ferry, Terry Sunderland, Cécile A. J. Girardin, Pascal Boeckx, John Armston, Lindsay F. Banin, Lan Qie, Marcela J. Quinones, Bernardus H. J. de Jong, Gabriela Lopez-Gonzalez, Richard Lucas, Edward T. A. Mitchard, Riccardo Valentini, Martin Herold, Valerio Avitabile, Laszlo Nagy, Jeremy A. Lindsell, Elizabeth Kearsley, Simon L. Lewis, Arief Wijaya, Nicolas Bayol, Nicholas J. Berry, Casey M. Ryan, Gaia Vaglio Laurin, Ben DeVries, Roberto Cazzolla Gatti, Yadvinder Malhi, Gerard B. M. Heuvelink, Oliver L. Phillips, Alexandra C. Morel, Peter S. Ashton, Gregory P. Asner, Simon Willcock, Avitabile V., Herold M., Heuvelink G.B.M., Lewis S.L., Phillips O.L., Asner G.P., Armston J., Ashton P.S., Banin L., Bayol N., Berry N.J., Boeckx P., de Jong B.H.J., Devries B., Girardin C.A.J., Kearsley E., Lindsell J.A., Lopez-Gonzalez G., Lucas R., Malhi Y., Morel A., Mitchard E.T.A., Nagy L., Qie L., Quinones M.J., Ryan C.M., Ferry S.J.W., Sunderland T., Laurin G.V., Cazzolla Gatti R., Valentini R., Verbeeck H., Wijaya A., and Willcock S.
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0106 biological sciences ,010504 meteorology & atmospheric sciences ,Mean squared error ,Forest plot ,Climate change ,Datasets as Topic ,Structural basin ,010603 evolutionary biology ,01 natural sciences ,Ecology and Environment ,Trees ,Laboratory of Geo-information Science and Remote Sensing ,Tropical forest ,Environmental Chemistry ,Satellite imagery ,Laboratorium voor Geo-informatiekunde en Remote Sensing ,Biomass ,Aboveground bioma ,0105 earth and related environmental sciences ,General Environmental Science ,Remote sensing ,Global and Planetary Change ,Tropical Climate ,Forest inventory ,Ecology ,Tropics ,Aboveground biomass ,Carbon cycle ,15. Life on land ,Models, Theoretical ,Sensor fusion ,PE&RC ,Forest plots ,Satellite mapping ,13. Climate action ,Spatial ecology ,Environmental science ,Physical geography ,REDD+ ,ISRIC - World Soil Information ,Maps as Topic - Abstract
We combined two existing datasets of vegetation aboveground biomass (AGB) (Proceedings of the National Academy of Sciences of the United States of America, 108, 2011, 9899; Nature Climate Change, 2, 2012, 182) into a pan-tropical AGB map at 1-km resolution using an independent reference dataset of field observations and locally calibrated high-resolution biomass maps, harmonized and upscaled to 14477 1-km AGB estimates. Our data fusion approach uses bias removal and weighted linear averaging that incorporates and spatializes the biomass patterns indicated by the reference data. The method was applied independently in areas (strata) with homogeneous error patterns of the input (Saatchi and Baccini) maps, which were estimated from the reference data and additional covariates. Based on the fused map, we estimated AGB stock for the tropics (23.4 N-23.4 S) of 375 Pg dry mass, 9-18% lower than the Saatchi and Baccini estimates. The fused map also showed differing spatial patterns of AGB over large areas, with higher AGB density in the dense forest areas in the Congo basin, Eastern Amazon and South-East Asia, and lower values in Central America and in most dry vegetation areas of Africa than either of the input maps. The validation exercise, based on 2118 estimates from the reference dataset not used in the fusion process, showed that the fused map had a RMSE 15-21% lower than that of the input maps and, most importantly, nearly unbiased estimates (mean bias 5Mg dry massha-1 vs. 21 and 28Mgha-1 for the input maps). The fusion method can be applied at any scale including the policy-relevant national level, where it can provide improved biomass estimates by integrating existing regional biomass maps as input maps and additional, country-specific reference datasets.
- Published
- 2016
4. The impact of selective logging and clearcutting on forest structure, tree diversity and above-ground biomass of African tropical forests
- Author
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Francesco Paparella, David A. Coomes, Jeremy A. Lindsell, Riccardo Valentini, Arianna Di Paola, Mauro Maesano, Simona Castaldi, Roberto Cazzolla Gatti, Marco Marchetti, Cazzolla Gatti, R., Castaldi, Simona, Lindsell, J. A., Coomes, D. A., Marchetti, M., Maesano, M., Di Paola, A., Paparella, F., Valentini, R., Cazzolla Gatti, Roberto, Lindsell, Jeremy A., Coomes, David A., Marchetti, Marco, Maesano, Mauro, Di Paola, Arianna, Paparella, Francesco, Valentini, Riccardo, Cazzolla Gatti R., Castaldi S., Lindsell J.A., Coomes D.A., Marchetti M., Maesano M., Di Paola A., Paparella F., and Valentini R.
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Tropical and subtropical dry broadleaf forests ,Clearcutting ,Forest degradation ,Tropical forests ,Agroforestry ,Logging ,Forest management ,Biodiversity ,Selective logging ,Sierra leone ,Bioma ,Tropical forest ,Africa ,Secondary forest ,Environmental science ,Africa, Biodiversity, Biomass, Forest degradation, Selective logging, Tropical forests ,Tropical and subtropical moist broadleaf forests ,Ecology, Evolution, Behavior and Systematics ,Salvage logging - Abstract
Tropical deforestation is well known to have serious negative consequences for biodiversity, terrestrial carbon sinks and the balance of atmospheric greenhouse gases. By contrast, selective logging of tropical forests is often regarded as having a lesser impact on the ecosystem particularly in long terms, even though there have been few critical evaluations of the practice, particularly in Africa. We compared field data from 511 plots in the tropical forest of Sierra Leone, Ghana, Cameroon and Gabon. These plots were subject to different forest management practices: no recent logging (primary forests), selective logging (up to 30years old) and re-grown secondary forests post clear-cutting (at least 20years ago). Our findings suggest that the vertical structure and plant richness of the selectively logged and secondary forests change in different amplitude from those of primary forests, but stem density and the prevalence of vine and weed species differ greatly. We show that the effects of selective logging are greater than those expected simply from the removal of commercial species, and can persist for decades. Selective logging, unless it is practiced at very low harvest intensities, can significantly reduce the biomass of a tropical forest for many decades, seriously diminishing aboveground carbon storage capacity, and create opportunities for weeds and vines to spread and slow down the ecological succession.
- Published
- 2014
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