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Filters: Tags: nonnative species (X) > Date Range: {"choice":"week"} (X)

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FY2011Thousands of data points have been collected by Oregon Department of Fish and Wildlife and Nevada Division of Wildlife from the 1950s to the present describing the distribution of declining native redband and endangered Lahontan cutthroat trout, and the invasive, nonnative brown and brook trout. USGS analyzed this data to understand the climate-related changes to species distributions and model extinction risk. The results, submittedfor publication, will be used by the State of Oregon as it drafts conservation plans for redband trout and by the Nevada Division of Environmental Protection in drafting water quality criteria to protect and monitor the states coldwater fisheries.
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This refined map was created to help assess possible spread of nonindigenous aquatic species distributions due to flooding associated with Hurricane Harvey. Storm surge and flood events can assist expansion and dissemination of nonindigenous aquatic species through the connection of adjacent watersheds, backflow of water upstream of impoundments, increased downstream flow, and creation of freshwater bridges along coastal regions. This map will help natural resource managers determine potential new locations for individual species, or to develop a watch list of possible new species within a watershed. These data include a subset of data from the Nonindigenous Aquatic Species Database, that fall within the general...


    map background search result map search result map Nonindigenous aquatic species and potential spread after Hurricane Harvey-revised map Climate impacts on streamflows, thermal regimes, and the changing distribution of trout in the Great Basin Nonindigenous aquatic species and potential spread after Hurricane Harvey-revised map Climate impacts on streamflows, thermal regimes, and the changing distribution of trout in the Great Basin