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Tropical deforestation and species endangerment: the role of remote sensing

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Abstract

Initial results of a pilot study to link remotely-sensed information on tropical forest loss to field-based information on species endangerment are reported here. LANDSAT multispectral scanner (MSS) imagery from 1973 and 1988 were used to estimate net forest removal (29% of forest area), regrowth (7% of forest area, including possible artifactual errors), and forest edges in Mabira Forest in southeastern Uganda during the 15-year period. Of the forest remaining, the percentage that was heavily disturbed increased from 18% to 42%. This change in forest density was observable with the MSS imagery. The total forest edge-to-area ratio (including edges interior to the forest boundary) increased by 29% over the period. Although four distinct types of closed tropical forest, based on structure or dominance, could be recognized on the ground, the types could not be distinguished by differences in spectral reflectance in the four MSS bands. Closed tropical forest could be readily distinguished from exotic conifer plantations, banana plantations, and other non-forest vegetation types. Field measurements in Mabira and other Ugandan rain forests, and in rain forest isolates on the Atherton Tableland of North Queensland, are being made to relate changes in forest fragmentation to resulting changes in species abundance, structural form of the forests, and morphological diversity of target populations. Possible applications of conservation biology theory and modeling to these data are briefly discussed.

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Authors and Affiliations

  1. Applied Science Division, Lawrence Berkeley Laboratory, Bldg. 90-3125, 1 Cyclotron Road, 94720, Berkeley, CA, USA

    Walter E. Westman

  2. TGS Technology, Inc., NASA Ames Research Center, Mail Stop 242-4, 94035, Moffett Field, CA, USA

    Laurence L. Strong

  3. Institute for Sustainable Development, 3000 Sand Hill Rd, Bldg 1, Suite 102, 94025, Menlo Park, CA, USA

    Bruce A. Wilcox

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  1. Walter E. Westman
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  2. Laurence L. Strong
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  3. Bruce A. Wilcox
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Westman, W.E., Strong, L.L. & Wilcox, B.A. Tropical deforestation and species endangerment: the role of remote sensing. Landscape Ecol 3, 97–109 (1989). https://doi.org/10.1007/BF00131173

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