Salmonid colonization of new streams in Glacier Bay National Park, Alaska

摘要: . Following the rapid recession of a neoglacial ice sheet within last 250 years, colonization recently deglaciated streams by salmonid fishes was investigated in Glacier Bay National Park, south-eastern Alaska. The primary factors governing establishment, species diversity composition and abundance salmonids were water temperature, sediment loading stream discharge. No found turbid meltwater emerging from retreating ice. Coho, Oncorhynchus kisutch (Walbaum), sockeye, nerka (Walbaum). salmon Dolly Vardcn, Salvelinus malma charr first to colonize youngest clearwater stream. Juvenile Varden more abundant than juvenile coho most formed because characteristic absence pool habital. Densities six times greater with series lakes compared similar age without lakes. Future advancement stocks will probably depend upon rate extent development riparian vegetation inputs large woody debris developing forest provide further instream cover, habitat variation channel stabilization.