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Number of amphibian species, by freshwater ecoregion. We calculated the number of amphibian species per freshwater ecoregion using species range maps of the Global Amphibian Assessment (GAA, www.iucnredlist.org/amphibians) (IUCN et al. 2006). The 2006 GAA assessed 5,918 amphibian species and provided distribution maps for 5,640 of those species. When a range overlapped several ecoregions, we counted species as present in all those ecoregions that had part of the range. This may have resulted in an overestimate of species numbers in some ecoregions, especially those that are long and narrow in shape. This is particularly true for the Amazonas High Andes ecoregion (312), where the mountain range has been used as...
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Relative abundance of salt marsh habitat, by marine ecoregion. We compiled a global database on salt marshes in collaboration with UNEP-WCMC and with input from Paul Adam, University of New South Wales, Australia. In this database, habitat abundance was estimated using the array of point locations and GIS data holdings from this database and were broadly based on abundance as a proportion of the total coastline length in each ecoregion. Salt marshes were poorly covered in the literature for some parts of the Arctic coastline and from wide areas of the tropics where salt marshes were often overlooked or classified within mangrove areas. While efforts were made to target data searching for these regions, there may...
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Number of mammal species, by terrestrial ecoregion. We compiled data on terrestrial mammals by querying the WWF WildFinder database for species occurrences by ecoregion. The WWF WildFinder database is a spatially explicit online database of vertebrate species occurrences by ecoregion. These data were displayed in a map published in The Atlas of Global Conservation (Hoekstra et al., University of California Press, 2010). More information at http://nature.org/atlas.
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Number of globally threatened animals, by terrestrial ecoregion. We compiled a vertebrate species list for each ecoregion from WWF’s WildFinder database (WWF 2006). This list was then compared against the IUCN Red List of Threatened Species (2008) to determine the number of species per ecoregion that are threatened. Threatened species are those listed by IUCN Red List as Vulnerable, Endangered, or Critically Endangered (www.redlist.org). These data were derived by The Nature Conservancy, and were displayed in a map published in The Atlas of Global Conservation (Hoekstra et al., University of California Press, 2010). More information at http://nature.org/atlas. Data derived from: World Wildlife Fund (WWF). 2006....
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This shapefile represents The Nature Conservancy’s (TNC) “essential forests” and “key connectors” in the Central Appalachians Whole System. Essential Forests are built around groups of large forest patches, ecoregional portfolio roll-up sites, and areas with high local integrity and high flow density (from M. Anderson’s resiliency analysis). Key Connectors provide physical linkages among essential forests, have high flow density, and may also include large forest patches and matrix blocks. The polygons were originally delineated by TNC staff at a workshop near Petersburg, West Virginia, on March 9 and 10, 2011. The boundaries were hand-drawn on paper maps and then hand-digitized by A. Watland (TNC-VA) and T. Gagnolet...
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Provisional Tennessee State Wildlife Action Plan (TN-SWAP) terrestrial habitat priorities versus results of the population growth model developed by the Tennessee Chapter of The Nature Conservancy, 2008, converted to percent projected developed landcover in the year 2040. Spatial growth model was developed using population growth projections from the University of Tennessee Center for Business and Economic Research (UT-CBER), county urban growth boundaries, 2000 census blocks, and various ancillary datasets.
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Using funds from an NRDAR settlement, FWS obligated $557,810 ($2011) to TNC of Massachusetts for the purchase of permanent conservation easements on approximately 200 acres of riparian lands along the Housatonic River in Salisbury, Connecticut. Conservation of riparian habitat will help to (1) protect water quality; (2) protect nesting habitat for migratory songbirds and other wildlife, including several rare and endangered plants, turtles, salamanders and dragonflies; and (3) maintain the scenic, agrarian character of the region. These efforts provide a beneficial tradeoff from the harm to the river and associated wildlife caused by historical polychlorinated biphenyls (PCBs) contamination. Economic Impacts of...
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Amount of fish and shellfish caught using bottom trawling and dredging (1955-2004), by marine ecoregion. The map shows trawling and dredging fishing pressure by marine ecoregion between 1955 and 2004, using fish and shellfish catch data from the University of British Columbia (SAUP 2007). Our analysis of the catch data was limited to species caught by bottom trawl or dredge gear (Watson et al. 2006a). We calculated the annual total tonnage of catch for all species caught by these gears in each ecoregion. To account for recovery of benthic systems over time, we applied a decay factor of 2 percent for each year before 2004 to the total catch (implying a full recovery in fifty years). We then calculated the cumulative...
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The National Park Service (NPS), in conjunction with the Biological Resources Division (BRD) of the U.S. Geological Survey (USGS), has implemented a program to "develop a uniform hierarchical vegetation methodology" at a national level. The program will also create a geographic information system (GIS) database for the parks under its management. The purpose of the data is to document the state of vegetation within the NPS service area during the 1990's, thereby providing a baseline study for further analysis at the Regional or Service-wide level. The vegetation at Devils Tower National Monument was mapped using 1:16,000 scale U.S. Forest Service Color Aerial Photography acquired July 29, 1993. The mapping classification...
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Number of seagrass species, by marine ecoregion. We extracted seagrasses from version 2.0 of the global polygon and point data set that was compiled by UNEP-WCMC in 2005 (for more information about the source data set, e-mail spatialanalysis@unep-wcmc.org). These same data were originally published in the World Atlas of Seagrasses (Green and Short 2003; see, in particular, the chapter by Spalding et al. 2003). The source data for the habitat map were a mix of point and polygon information gathered from a major literature review as well as from national-level mapping programs. We developed the species diversity map from range maps drawn for fifty-five species. The four species from the genus Ruppia were not mapped...
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Number of stony coral species, by marine ecoregion. Stony coral range maps have been drawn by Veron (2000), who kindly made available to us range maps for 794 species. We laid these range maps over the ecoregions to derive a species total for each ecoregion. Note that these stony corals have a wider range than coral reefs. The large physical structures of coral reefs only develop where such corals survive in sufficient densities (and usually diversity) over the long time scales it takes for such structures to form. These data were derived by The Nature Conservancy, and were displayed in a map published in The Atlas of Global Conservation (Hoekstra et al., University of California Press, 2010). More information...
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Results of the population growth model developed by the Tennessee Chapter of The Nature Conservancy, 2008, converted to percent projected developed landcover in the year 2040. Spatial growth model was developed using population growth projections from the University of Tennessee Center for Business and Economic Research (UT-CBER), county urban growth boundaries, 2000 census blocks, and various ancillary datasets.


map background search result map search result map Salt Marsh Abundance by Marine Ecoregion Number of Mammal Species by Terrestrial Ecoregion Number of Globally Threatened Animals by Terrestrial Ecoregion Number of Amphibian Species by Freshwater Ecoregion Number of Stony Coral Species by Marine Ecoregion Number of Seagrass Species by Marine Ecoregion Bottom Trawling and Dredging by Marine Ecoregion Devils Tower National Monument Vegetation Mapping Project - Spatial Vegetation Data Conservation Easements Along the Housatonic River Essential Forests and Key Connectors in the Central Appalachians Whole System Tennessee Projected Percent Developed in 2040 Provisional Tennessee State Wildlife Action Plan Potential Urban Growth Devils Tower National Monument Vegetation Mapping Project - Spatial Vegetation Data Conservation Easements Along the Housatonic River Tennessee Projected Percent Developed in 2040 Provisional Tennessee State Wildlife Action Plan Potential Urban Growth Essential Forests and Key Connectors in the Central Appalachians Whole System Salt Marsh Abundance by Marine Ecoregion Number of Stony Coral Species by Marine Ecoregion Number of Seagrass Species by Marine Ecoregion Bottom Trawling and Dredging by Marine Ecoregion Number of Mammal Species by Terrestrial Ecoregion Number of Globally Threatened Animals by Terrestrial Ecoregion Number of Amphibian Species by Freshwater Ecoregion