Amazonian deforestation and global warming: Carbon stocks in vegetation replacing Brazil's Amazon forest Export

@article{309, abstract = {Carbon stocks in vegetation replacing forest in Brazilian Amazonia affect net emissions of greenhouse gases from land-use change. A Markov matrix of annual transition probabilities was constructed to estimate landscape composition in 1990 and to project future changes, assuming behavior of farmers and ranchers remains unchanged. The estimated 1990 landscape was 5.4\% farmland, 44.8\% productive pasture, 2.2\% degraded pasture, 2.1\% 'young' (1970 or later) secondary forest derived from agriculture, 28.1\% 'young' secondary forest derived from pasture, and 17.4\% 'old' (pre-1970) secondary forest. The landscape would eventually approach an equilibrium of 4.0\% farmland, 43.8\% productive pasture, 5.2\% degraded pasture, 2.0\% secondary forest derived from agriculture, and 44.9\% secondary forest derived from pasture. An insignificant amount is regenerated 'forest' (defined as secondary forest over 100 years old). Average total biomass (dry matter, including below-ground and dead components) was 43.5 t ha(-1) in 1990 in the 410 X 10(3) km(2) deforested by that year for uses other than hydroelectric dams. At equilibrium, average biomass would be 28.5 t ha(-1) over all deforested areas (excluding dams). These biomass values are more than double those forming the basis of deforestation emission estimates currently used by the Intergovernmental Panel on Climate Change (IPCC). Although higher replacement landscape biomass decreases net emissions from deforestation, these estimates still imply large net releases}, author = {Fearnside, P. M.}, citeulike-article-id = {1306789}, journal = {Forest Ecology And Management}, keywords = {agriculture, amazon, amazonia, areas, biomass, carbon, carbon\_dioxide, climate, climate\_change, deforestation, dioxide, emissions, fallow, fif, forest, future, global\_warming, greenhouse, greenhouse\_effect, greenhouse\_gases, ipcc, land\_use, land\_use\_change, matter, pasture, patterns, release, secondary\_succession, shifting\_cultivation, transition, tropical\_deforestation, vegetation}, pages = {21--34}, posted-at = {2007-05-19 01:45:15}, priority = {2}, title = {Amazonian deforestation and global warming: Carbon stocks in vegetation replacing Brazil's Amazon forest}, volume = {80}, year = {1996} }

TY - JOUR ID - 309 L3 - citeulike-article-id:1306789 N2 - Carbon stocks in vegetation replacing forest in Brazilian Amazonia affect net emissions of greenhouse gases from land-use change. A Markov matrix of annual transition probabilities was constructed to estimate landscape composition in 1990 and to project future changes, assuming behavior of farmers and ranchers remains unchanged. The estimated 1990 landscape was 5.4% farmland, 44.8% productive pasture, 2.2% degraded pasture, 2.1% 'young' (1970 or later) secondary forest derived from agriculture, 28.1% 'young' secondary forest derived from pasture, and 17.4% 'old' (pre-1970) secondary forest. The landscape would eventually approach an equilibrium of 4.0% farmland, 43.8% productive pasture, 5.2% degraded pasture, 2.0% secondary forest derived from agriculture, and 44.9% secondary forest derived from pasture. An insignificant amount is regenerated 'forest' (defined as secondary forest over 100 years old). Average total biomass (dry matter, including below-ground and dead components) was 43.5 t ha(-1) in 1990 in the 410 X 10(3) km(2) deforested by that year for uses other than hydroelectric dams. At equilibrium, average biomass would be 28.5 t ha(-1) over all deforested areas (excluding dams). These biomass values are more than double those forming the basis of deforestation emission estimates currently used by the Intergovernmental Panel on Climate Change (IPCC). Although higher replacement landscape biomass decreases net emissions from deforestation, these estimates still imply large net releases JF - Forest Ecology And Management EP - 34 TI - Amazonian deforestation and global warming: Carbon stocks in vegetation replacing Brazil's Amazon forest VL - 80 SP - 21 KW - agriculture KW - amazon KW - amazonia KW - areas KW - biomass KW - carbon KW - carbon_dioxide KW - climate KW - climate_change KW - deforestation KW - dioxide KW - emissions KW - fallow KW - fif KW - forest KW - future KW - global_warming KW - greenhouse KW - greenhouse_effect KW - greenhouse_gases KW - ipcc KW - land_use KW - land_use_change KW - matter KW - pasture KW - patterns KW - release KW - secondary_succession KW - shifting_cultivation KW - transition KW - tropical_deforestation KW - vegetation AU - Fearnside, PM PY - 1996/// ER -