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Population status of freshwater turtles across a PCB contamination gradient
Residents of both turtle species were relatively heavier in a contaminated river segment, but PCB concentration did not otherwise influence relative abundance of turtles, probabilities of habitat occupancy or detection, sex or age ratios, body size, incidence of deformities, external parasite occurrence, or several movement parameters in a manner consistent with adverse impacts to wild turtles.
Frog and Toad Habitat Occupancy across a Polychlorinated Biphenyl (PCB) Contamination Gradient
Habitat occupancy varied strongly in response to whether breeding sites were hydrologically connected to the Hudson River but was independent of the degree of PCB contamination of a given river segment, highlighting the uncertainties of extrapolating outcomes of laboratory-based, toxicological studies to wild amphibian populations.
Scale-dependence in polychlorinated biphenyl (PCB) exposure effects on waterbird habitat occupancy
Spatial scale clearly mediates expression of contaminant impacts on wild bird populations; large-scale, expert-generated databases provide an underused opportunity for better delineating the spatial scales at which population impacts occur and risk assessments should be performed.