Browsing by Subject "IUCN Red List"

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    Impacts of Deforestation on the Conservation Status of Endemic Birds in the North Maluku Endemic Bird Area from 1990-2003
    (2009-04-23T16:45:59Z) Vetter, John P.
    Satellite imagery has become a powerful tool to analyze land-use trends across large portions of the globe, including remote areas where access is logistically or political impossible. Due to the rapid pace of deforestation, the high biodiversity contained within, and the difficulty of access and standardized field surveys, the tropics are a key front for using remote sensing to identify target areas for conservation action and, more recently, to inform species-level trends. This study focuses on deforestation in eastern Indonesia, which has some of the highest rates of forest clearing in the world from mining, plantation expansion, timber extraction, and shifting agriculture. Forest loss on the highly biodiverse islands of the North Maluku district in eastern Indonesia was examined from 1990 to 2003 and the conservation status of 39 restricted-range avian species found in the area was re-assessed from these trends. Of the land area available for analysis, forests declined from 86% to just under 70% in these thirteen years, with much of this occurring in the lowlands (below 400m). Consequently, those species with large amounts of their range at low elevations were disproportionately affected, with 10 out of 25 endemic species being under more threat than currently listed by the IUCN Red List and only 3 being considered safer than currently listed.
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    Measuring Terrestrial Area of Habitat (AOH) and Its Utility for the IUCN Red List.
    (Trends in ecology & evolution, 2019-11) Brooks, Thomas M; Pimm, Stuart L; Akçakaya, H Resit; Buchanan, Graeme M; Butchart, Stuart HM; Foden, Wendy; Hilton-Taylor, Craig; Hoffmann, Michael; Jenkins, Clinton N; Joppa, Lucas; Li, Binbin V; Menon, Vivek; Ocampo-Peñuela, Natalia; Rondinini, Carlo
    The International Union for Conservation of Nature (IUCN) Red List of Threatened Species includes assessment of extinction risk for 98 512 species, plus documentation of their range, habitat, elevation, and other factors. These range, habitat and elevation data can be matched with terrestrial land cover and elevation datasets to map the species' area of habitat (AOH; also known as extent of suitable habitat; ESH). This differs from the two spatial metrics used for assessing extinction risk in the IUCN Red List criteria: extent of occurrence (EOO) and area of occupancy (AOO). AOH can guide conservation, for example, through targeting areas for field surveys, assessing proportions of species' habitat within protected areas, and monitoring habitat loss and fragmentation. We recommend that IUCN Red List assessments document AOH wherever practical.