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REGBorneo_DegradedForest_1973to2015_CIFOR (Map Service)


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Service Description: Burned forests appear distinct from intact and logged forests on LANDSAT imagery. These distinct spectral signals remain visible for several years (Figure 1), which explains why recently published state-of-the-art deforestation analyses detected forests severely degraded by fire as deforested. To estimate the area of burned forest where scrublands have replaced forests before being converted to oil-palm plantations, we reviewed available literature to determine the timing and broad location of fires. Next, we organized our LANDSAT database into imagery acquired before and after seven major fire events noted in our literature search. We then searched for changes in the spectral reflectance of forests that were consistent with changes from high tree cover and species-rich forests to a homogeneous low vegetation cover on the pre- and post-fire imagery (Figure 1). Due to the variety of forest types as well as variable image acquisition conditions in Borneo, and the persistence of cloud cover even during the dry season, we performed this assessment manually by visual interpretation. We note that scrublands mapped in this study may show regeneration potentials in some region, which we do not address in this study


Figure 1│ A close up view of an area in South Kalimantan province, Borneo where the 1997 ENSO-triggered drought and fires converted an intact forest to scrubs. In the left panel, the forest was intact in May 1997, and appears dark brown on this LANDSAT 5 imagery (false color composite: 4-5-3). This forest burned in September-October 1997. In the right panel, three years after fire, much of this forest appears cyan, indicating areas with low vegetation cover.

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Layers: Tables: Description: Burned forests appear distinct from intact and logged forests on LANDSAT imagery. These distinct spectral signals remain visible for several years (Figure 1), which explains why recently published state-of-the-art deforestation analyses detected forests severely degraded by fire as deforested. To estimate the area of burned forest where scrublands have replaced forests before being converted to oil-palm plantations, we reviewed available literature to determine the timing and broad location of fires. Next, we organized our LANDSAT database into imagery acquired before and after seven major fire events noted in our literature search. We then searched for changes in the spectral reflectance of forests that were consistent with changes from high tree cover and species-rich forests to a homogeneous low vegetation cover on the pre- and post-fire imagery (Figure 1). Due to the variety of forest types as well as variable image acquisition conditions in Borneo, and the persistence of cloud cover even during the dry season, we performed this assessment manually by visual interpretation. We note that scrublands mapped in this study may show regeneration potentials in some region, which we do not address in this study


Figure 1│ A close up view of an area in South Kalimantan province, Borneo where the 1997 ENSO-triggered drought and fires converted an intact forest to scrubs. In the left panel, the forest was intact in May 1997, and appears dark brown on this LANDSAT 5 imagery (false color composite: 4-5-3). This forest burned in September-October 1997. In the right panel, three years after fire, much of this forest appears cyan, indicating areas with low vegetation cover.

Copyright Text: CIFOR

Spatial Reference:
102100

Single Fused Map Cache: true

Capabilities: Map,TilesOnly

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