| http://www.w3.org/ns/prov#value | - A petition to list the Rana muscosa/Rana sierrae complex as endangered cited the following threats: non-native fish introductions, contaminant introductions, livestock grazing, acidification from atmospheric deposition, nitrate deposition, ultraviolet radiation, drought, disease, and other factors (see USFWS 2000).Extensive surveys in the Sierra Nevada clearly demonstrate the strong detrimental im
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