Endangered ecosystems of the United States: a preliminary assessment of loss and degradation

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dc.acquisition-srcUSGS website (http://biology.usgs.gov/pubs/ecosys.htm)en_US
dc.call-noQH76.N687 1995en_US
dc.contract-noen_US
dc.contributor.authorNoss, R.F.en_US
dc.contributor.authorLaRoe, E.T., IIIen_US
dc.contributor.authorScott, J.M.en_US
dc.contributor.otheren_US
dc.date.accessioned2010-02-15T17:35:57Z
dc.date.available2010-02-15T17:35:57Z
dc.date.issuedn.d.en_US
dc.degreeen_US
dc.description83 p.en_US
dc.description-otheren_US
dc.description.abstractThis report estimates declines of natural ecosystems in the United States, provides a rationale for ecosystem-level conservation, discusses decline and threat as criteria for conservation, and relates ecosystem losses to endangerment at species and population levels. Ecosystems are defined generally and at various spatial scales and include vegetation types, plant associations, natural communities, and habitats defined by floristics, structure, age, geography, condition, and other ecologically relevant factors. The methodology for this report consisted of a literature review and a survey of conservation agencies and professionals. The results of this preliminary study indicted significant losses of biodiversity at the ecosystem level in the United States. The most substantial losses were summarized by listing ecosystems as critically endangered, endangered, and threatened. More than 30 critically endangered, 58 endangered, and more than 38 threatened ecosystems were identified. Losses of all kinds of ecosystems have been most pronounced in the South, Northeast, and Midwest, and in California.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/26041
dc.latitudeen_US
dc.locationTAMUG Circulating Collectionen_US
dc.longitudeen_US
dc.notesPublished on their website as an html file; as of 10/22/1999. (http://biology.usgs.gov/pubs/ecosys.htm)en_US
dc.placeen_US
dc.publisherU.S. Geological Survey, Biological Resourcesen_US
dc.relation.ispartofseries8965.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjecten_US
dc.titleEndangered ecosystems of the United States: a preliminary assessment of loss and degradationen_US
dc.typeBooken_US
dc.universityen_US
dc.vol-issueen_US

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