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- W2068194561 abstract "Metal contamination can disrupt trophic links in food webs by altering the taxonomic composition and size structure of benthic macroinvertebrate communities. Benthic macroinvertebrates and yellow perch (Perca flavescens) were collected from six lakes along a gradient of cadmium (Cd) and copper (Cu) contamination in Quebec, Canada. The two most contaminated lakes had significantly lower densities of several benthic macroinvertebrate taxa and significantly lower Shannon's index than less contaminated lakes. The stomach contents of perch from the most contaminated lakes were less diverse, with a greater reliance on chironomids and (or) zooplankton than perch from other study lakes. The size of prey in perch from the most contaminated lakes did not increase with age and the mean prey size was smaller than in other, less contaminated lakes. Perch from lakes with medium to low levels of contamination weighed significantly more than perch from lakes with high levels of contamination. This reduction in growth is attributed to the increased costs of foraging on a simplified prey base in metal-contaminated systems." @default.
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- W2068194561 date "2005-01-01" @default.
- W2068194561 modified "2023-10-14" @default.
- W2068194561 title "Impacts of altered benthic invertebrate communities on the feeding ecology of yellow perch (<i>Perca flavescens</i>) in metal-contaminated lakes" @default.
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- W2068194561 doi "https://doi.org/10.1139/f04-181" @default.
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