Large-scale impoverishment of Amazonian forests by logging and fire

Nepstad, Daniel C.; Verssimo, Adalberto; Alencar, Ane; Nobre, Carlos A.; Lima, Eirivelthon; Lefebvre, Paul; Schlesinger, P.; Potter, Christopher S.; Moutinho, Paulo; Mendoza, Elsa; Cochrane, Mark A.; Brooks, Vanessa

doi:10.1038/19066

Cited by 1,166 publications

(879 citation statements)

References 22 publications

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Section: Logging Disturbancesupporting

confidence: 88%

“…Field validation of their study suggests a combined uncertainty of 11-14% in a logged area of O47 000 km 2 . These estimates echo those of previous studies indicating that selective logging affects an area that is comparable or greater than that completely clear-cut every year [7,8].In another recent study in a smaller forest area of southern Amazonia surrounded by the recent expansion of soybean agriculture, Souza, Jr and collaborators [6] field tested another image-processing technique that holds great promise as a tool to map logging and fire-induced canopy damage. The technique relies on a gap fraction index (the Normalized Difference Fraction Index, NDFI) that combines the green and non-photosynthetic vegetation, soil and shade fractions derived from SMA to enhance the detection of log landings and skid trails, the spatial signature of selective logging [9].…”

supporting

confidence: 77%

“…Total area affected by deforestation (green circles), selective logging (red squares) and surface fires (blue diamonds) throughout Brazilian Amazonia during the past century. These estimates are based on a range of sources, including the annual deforestation statistics made available by INPE [5]; a conservative estimate of basin-wide logging disturbance [5,8,16]; and a conservative estimate of the area affected by surface wildfires [7,17].…”

Section: Discussionmentioning

confidence: 99%

“…Surface fire disturbance Logging disturbance often paves the way for surface fires, which have affected millions of hectares of Amazonian forests in recent years [7,13] with devastating effects on the flora and fauna (e.g. [14]).…”

Section: Logging Disturbancementioning

confidence: 99%

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Detecting anthropogenic disturbance in tropical forests

Peres

Barlow

Laurance

2006

Trends in Ecology & Evolution

212

154

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Section: Logging Disturbancesupporting

confidence: 88%

supporting

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Section: Logging Disturbancementioning

confidence: 99%

See 2 more Smart Citations

Detecting anthropogenic disturbance in tropical forests

Peres

Barlow

Laurance

2006

Trends in Ecology & Evolution

212

154

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“…Estas áreas de florestas impactadas pelo fogo e por atividades madeireiras podem alcançar dimensões semelhantes às áreas desmatadas na região Amazônica (Nepstad et al, 1999;Asner et al, 2005;Matricardi et al, 2010Matricardi et al, , 2013.…”

Section: Introductionunclassified

Avaliação do desmatamento no estado de Rondônia entre 2001 e 2011

et al. 2014

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RESUMONo presente estudo, foi avaliada a acurácia dos mapeamentos do desmatamento conduzidos pelo Programa de Monitoramento do Desflorestamento na Amazônia (PRODES) do Instituto Nacional de Pesquisas Espaciais (INPE) e pela Secretaria de Estado do Desenvolvimento Ambiental (SEDAM), para o Estado de Rondônia, no período entre 2001 a 2011, utilizando imagens Landsat 5 TM. Com base nos resultados deste estudo, os mapeamentos conduzidos pela SEDAM e pelo PRODES-INPE apresentaram coeficientes Kappa similares, estimados em 0,89 e 0,87, respectivamente. Os dados do desmatamento dos sistemas PRODES e SEDAM revelaram um decréscimo nas taxas de desmatamento em todo o Estado de Rondônia no período de análise, embora os desmatamentos ilegais dentro de áreas protegidas tenham aumentado cerca de 400% entre 2002 e 2011. Assumindo-se esta tendência de desmatamento da última década, é possível afirmar que as terras indígenas e unidades de conservação (UC) em Rondônia serão os principais alvos de desmatamento e destruição nos próximos anos.Palavras-chave: sensoriamento remoto, mudanças no uso e na cobertura da terra, Floresta Amazônica. Deforestation Assessment in the State of Rondônia between 2001 and 2011 ABSTRACTThe goal of this study was to assess the accuracy of deforestation maps produced by the National Institute for Spatial Research (INPE) and the Rondônia State Secretariat of Environmental Development (SEDAM) for the state of Rondônia between 2001 and 2011. Our results show that the deforestation mappings conducted by SEDAM and PRODES-INPE present similar Kappa coefficients, which were estimated at 0.89 and 0.87, respectively. The deforestation datasets prepared by PRODES and SEDAM show a decrease in deforestation rates in Rondônia state in the study period. However, there was a significant increase in illegal deforestation (approximately 400% within the protected areas) in this period. Based on the deforestation trend observed in the past decade, we can affirm that forests inside protected areas are the main targets for deforestation in Rondônia state.

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Trophic Dynamics

Cleveland

Townsend

McKnight

2005

Encyclopedia of Hydrological Sciences

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The carbon (C) and water cycles are intimately linked in terrestrial ecosystems. Thus, an understanding o f the processes regulating transfers o f water in terrestrial ecosystems requires an understanding o f the carbon cycle, and in particular, the factors constraining carbon movement in the soii-piant-atmo sphere continuum and through trophic levels in ecosystems. The linkages between the C and the water cycles are mediated primarily through biological processes, and are bidirectional in nature. For example, precipitation (and hence ecosystem water avaiiabiiity) strongly regulates plant growth and biogeochemicai cycling in soils. Subsequently, plant growth and soil biogeochemistry strongly influence evaporation and atmospheric water vapor (and hence precipitation). Plant growth and soil processes are also cyciicaiiy linked. Thus, plant and soil interactions can have important implications fo r water cycling. However, while major climatic variables (including precipitation) may drive biological patterns and processes at large scales, other ecological interactions also regulate both plant and soil processes. An appreciation o f these ecological factors is important to understanding the relationship between C and water, and to predicting how global environmental change is likely to affect the interactions between the C and water cycles. Encyclopedia of Hydrological Sciences. Edited by M G Anderson.

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Large-scale impoverishment of Amazonian forests by logging and fire

Cited by 1,166 publications

References 22 publications

Detecting anthropogenic disturbance in tropical forests

Detecting anthropogenic disturbance in tropical forests

Avaliação do desmatamento no estado de Rondônia entre 2001 e 2011

Trophic Dynamics

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