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Many of the streams and aquifers that sustain Interior riparian deciduous forests in the US Southwest are being dewatered, yet we know little about how the plant communities are being affected by these hydrologic changes. This study found that several measures of biotic integrity, including Platanus wrightii xylem water potential, P. wrightii radial growth rate, tree species diversity, and woody plant wetland indicator scores, varied significantly with ground water depth and fluctuation among nine sites in Arizona. P. wrightii trees had highest productivity, and the forests had greatest compositional diversity, where ground water averaged less than 2 m below the tree base during the growing season and less than...
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Barriers to upstream fish movement (either long-term geologic, natural short-term, or anthropogenic barriers) will be used to assess whether individual stream segments are currently occupied by bull trout, for assessing risk of genetic introgression or disease to existing bull trout populations, or whether existing subpopulations are connected with other subpopulations. Only those barriers that are believed to have a significant influence bull trout distribution or population integrity will be identified.


    map background search result map search result map Biotic integrity of Platanus wrightii riparian forests in Arizona: first approximation BLM REA NGB 2011 Bull Trout Fish Barriers Biotic integrity of Platanus wrightii riparian forests in Arizona: first approximation BLM REA NGB 2011 Bull Trout Fish Barriers