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Title: Forest fires in southwestern Brazilian Amazonia: Estimates of area and potential carbon emissions
Authors: Vasconcelos, Sumaia Saldanha de
Fearnside, Philip Martin
Graça, Paulo Maurício Lima Alencastro de
Nogueira, Euler Melo
Oliveira, Luís Cláudio de
Figueiredo, Evandro Orfanó
Keywords: Amazon Forests
Brazilian Amazonia
Carbon Emissions
Carbon Stocks
Fire Event
Fire Scars
Forest Biomass
Forest Cover
Forest Fires
Satellite Images
Tree Mortality
Global Warming
Greenhouse Gases
Satellite Imagery
Aboveground Biomass
Belowground Biomass
Carbon Emission
Carbon Sequestration
Forest Cover
Forest Fires
Global Warming
Greenhouse Gas
Landsat Thematic Mapper
Satellite Imagery
Sustainable Development
Vegetation Mapping
Visual Analysis
Greenhouse Gases
Image Analysis
Acre [brazil]
Issue Date: 2013
metadata.dc.publisher.journal: Forest Ecology and Management
metadata.dc.relation.ispartof: Volume 291, Pags. 199-208
Abstract: Areas affected by forest fires that occurred in 2005 were mapped in the municipalities of Boca do Acre and Lábrea (in the southern part of Brazil's state of Amazonas) and estimates were made of the loss of biomass and carbon stock and the committed emissions from increased tree mortality due to fire. Fire scars observed on Landsat-5 TM satellite images from 2004 to 2006 were visually interpreted and digitized; over 865.6km2 of forest affected by fire were mapped, the majority (2.9% of the total forest cover) concentrated along the southern edges of the municipalities, which border on the states of Rondônia and Acre. The greatest loss of biomass due to the increase in tree mortality was indicated by the survey made 4years after the fires: 4.5×106Mg total (above+below-ground) and 3.7×106Mg (only above-ground). Consequently, 2.2×106MgC (total) and 1.8×106MgC (above-ground) of potential carbon emissions were committed from the initial burn of forest biomass and from trees killed by the fire. Emissions occur both through oxidation of dead biomass by decomposition or through combustion in subsequent fire events. Our results indicate that fires can affect extensive tracts of forest and can emit significant amounts of carbon to the atmosphere in periods of drought. Fire plays a significant role as a threat to the biological balance of the forest and causes loss of biomass and emission of greenhouse gases that have critical implications for the future of forests in the Amazon. © 2012 Elsevier B.V.
metadata.dc.identifier.doi: 10.1016/j.foreco.2012.11.044
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