Aboveground forest biomass varies across continents, ecological zones and successional stages: refined IPCC default values for tropical and subtropical forests
Copyright policy )Aboveground forest biomass varies across continents, ecological zones and successional stages: refined IPCC default values for tropical and subtropical forests
Abstract 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.
- University of Sheffield United Kingdom
- Gabriel René Moreno Autonomous University Bolivia
- Wageningen University & Research Netherlands
- Instituto de Investigaciones de la Amazonía Peruana Peru
- University of Dundee United Kingdom
DYNAMICS, Biomass (ecology), Tree Height Estimation, E-DAS, forêt tropicale, ALLOCATION, biomasse aérienne des arbres, SDG 13 - Climate Action, Meteorology & Atmospheric Sciences, Climate change, GE1-350, TD1-1066, General Environmental Science, Global and Planetary Change, GE, Geography, Physics, Global Forest Mapping, MATURE, Aboveground biomass, /dk/atira/pure/subjectarea/asjc/2700/2739, RECOVERY, http://aims.fao.org/aos/agrovoc/c_7537, Physical Sciences, http://aims.fao.org/aos/agrovoc/c_2128, Public Health, CARBON STOCKS, GE Environmental Sciences, Physical geography, Environmental Engineering, Science, QC1-999, Secondary and old-growth forests, 333, Environmental science, forest plots, SDG 3 - Good Health and Well-being, name=Renewable Energy, forêt primaire, Tropical and subtropical moist broadleaf forests, Biology, ACCUMULATION, Nature and Landscape Conservation, 580, Science & Technology, Renewable Energy, Sustainability and the Environment, Global Forest Drought Response and Climate Change, Environmental and Occupational Health, Public Health, Environmental and Occupational Health, Tropics, http://aims.fao.org/aos/agrovoc/c_ef82e42a, secondary and old-growth forests, FOS: Biological sciences, Environmental Science, http://aims.fao.org/aos/agrovoc/c_2f82b0a2, aboveground biomass; forest plots; IPCC; monitoring; secondary and old-growth forests; tropical and subtropical forests, 910, Tropical and subtropical forests, Estimation of Forest Biomass and Carbon Stocks, Environmental technology. Sanitary engineering, Aboveground Biomass, Environmental Science(all), надземная биомасса, NETWORK, SECONDARY FORESTS, старовозрастные леса, tropical forests, collecte de données, Ecology, http://aims.fao.org/aos/agrovoc/c_28112, tropical and subtropical forests, IPCC, Q, Forest plots, Mapping Forests with Lidar Remote Sensing, P01 - Conservation de la nature et ressources foncières, Global Vegetation Models, http://aims.fao.org/aos/agrovoc/c_1373987680230, aboveground biomass, Life Sciences & Biomedicine, Biomass Estimation, /dk/atira/pure/subjectarea/asjc/2100/2105, Monitoring, тропические леса, http://aims.fao.org/aos/agrovoc/c_28144, enquête, Environmental Sciences & Ecology, Objectif 13 Mesures relatives à la lutte contre les changements climatique, Greenhouse gas, лесные участки, name=Public Health, http://aims.fao.org/aos/agrovoc/c_24904, вторичные леса, greenhouse gases, MANAGEMENT, Renewable Energy, SDG 7 - Affordable and Clean Energy, name=General Environmental Science, /dk/atira/pure/subjectarea/asjc/2300/2300, MCC, Sustainability and the Environment, FOS: Environmental engineering, субтропические леса, K10 - Production forestière, carbone organique, Environmental sciences, monitoring, http://aims.fao.org/aos/agrovoc/c_bea12d1e, Subtropics, forêt secondaire, suivi et évaluation, Environmental Sciences
DYNAMICS, Biomass (ecology), Tree Height Estimation, E-DAS, forêt tropicale, ALLOCATION, biomasse aérienne des arbres, SDG 13 - Climate Action, Meteorology & Atmospheric Sciences, Climate change, GE1-350, TD1-1066, General Environmental Science, Global and Planetary Change, GE, Geography, Physics, Global Forest Mapping, MATURE, Aboveground biomass, /dk/atira/pure/subjectarea/asjc/2700/2739, RECOVERY, http://aims.fao.org/aos/agrovoc/c_7537, Physical Sciences, http://aims.fao.org/aos/agrovoc/c_2128, Public Health, CARBON STOCKS, GE Environmental Sciences, Physical geography, Environmental Engineering, Science, QC1-999, Secondary and old-growth forests, 333, Environmental science, forest plots, SDG 3 - Good Health and Well-being, name=Renewable Energy, forêt primaire, Tropical and subtropical moist broadleaf forests, Biology, ACCUMULATION, Nature and Landscape Conservation, 580, Science & Technology, Renewable Energy, Sustainability and the Environment, Global Forest Drought Response and Climate Change, Environmental and Occupational Health, Public Health, Environmental and Occupational Health, Tropics, http://aims.fao.org/aos/agrovoc/c_ef82e42a, secondary and old-growth forests, FOS: Biological sciences, Environmental Science, http://aims.fao.org/aos/agrovoc/c_2f82b0a2, aboveground biomass; forest plots; IPCC; monitoring; secondary and old-growth forests; tropical and subtropical forests, 910, Tropical and subtropical forests, Estimation of Forest Biomass and Carbon Stocks, Environmental technology. Sanitary engineering, Aboveground Biomass, Environmental Science(all), надземная биомасса, NETWORK, SECONDARY FORESTS, старовозрастные леса, tropical forests, collecte de données, Ecology, http://aims.fao.org/aos/agrovoc/c_28112, tropical and subtropical forests, IPCC, Q, Forest plots, Mapping Forests with Lidar Remote Sensing, P01 - Conservation de la nature et ressources foncières, Global Vegetation Models, http://aims.fao.org/aos/agrovoc/c_1373987680230, aboveground biomass, Life Sciences & Biomedicine, Biomass Estimation, /dk/atira/pure/subjectarea/asjc/2100/2105, Monitoring, тропические леса, http://aims.fao.org/aos/agrovoc/c_28144, enquête, Environmental Sciences & Ecology, Objectif 13 Mesures relatives à la lutte contre les changements climatique, Greenhouse gas, лесные участки, name=Public Health, http://aims.fao.org/aos/agrovoc/c_24904, вторичные леса, greenhouse gases, MANAGEMENT, Renewable Energy, SDG 7 - Affordable and Clean Energy, name=General Environmental Science, /dk/atira/pure/subjectarea/asjc/2300/2300, MCC, Sustainability and the Environment, FOS: Environmental engineering, субтропические леса, K10 - Production forestière, carbone organique, Environmental sciences, monitoring, http://aims.fao.org/aos/agrovoc/c_bea12d1e, Subtropics, forêt secondaire, suivi et évaluation, Environmental Sciences
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