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These maps are a digital representation of the individual treespecies range maps of the "Atlas of the United States Trees" byElbert L. Little, Jr. The atlas shows the natural distribution orrange of the native tree species of North America. These coveragesrepresent 3 volumes of the atlas.
The Arctic Ostracode Database provides species census data for about100 species of benthic marine Ostracoda from modern surface and lateQuaternary sediments from various parts of the Arctic Ocean andadjacent seas. Ostracodes are a microfossil group of bivalvedCrustacea that secrete a calcareous shell commonly preserved insediments in the Arctic region. Because many ostracode species haveecological limits controlled by temperature, salinity, oxygen, foodand other factors, they can provide an important tool forpaleoceanographic reconstruction in the Arctic. Some recentapplications of ostracodes to understanding Arctic Ocean historyinclude Briggs (1983), Reimnitz et al. (1983, 1992), McDougall etal. (1986), Clark et...
This report provides background information on the bat habitat map provided by the US Geological Survey to the Interior Columbia Basin Ecosystem Management Project (ICBEMP). This report is one in a series of digital maps, data files, and reports generated by the USGS to provide geologic process and mineral resource information for the ICBEMP.
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