Using extirpation to evaluate ionic tolerance of freshwater fish.

ABSTRACT: Field data of fish occurrences and specific conductivity were used to estimate the tolerance of freshwater fish to elevated ion concentrations and to compare the differences between species- and genus-level analyses for individual effects. We derived extirpation concentrations at the 95th percentile (XC95) of a weighted cumulative frequency distribution for fish species inhabiting streams of the central and southern Appalachians by customizing methods used previously with macroinvertebrate genera. Weighting factors were calculated based on the number of sites in basins where each species occurred, reducing overweighting observations of species restricted to fewer basins. Comparing the species- and genus-level fish XC95 values, XC95s for fish genera were near the XC95s for the most salt-tol

SUBMITTER: Griffith MB 

PROVIDER: S-EPMC5886021 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature