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Abstract
We investigated differences in delta(15)N of seston and icefishes from seven freshwater ecosystems with different trophic states in China. An increase of seston delta(15)N values was accompanied by an increase of total nitrogen and phosphorus concentrations. Significantly positive correlations were observed between delta(15)N of icefishes and delta(15)N of seston, total nitrogen and phosphorus concentrations. This study demonstrated that icefishes could be preferred indicators of anthropogenic contamination in test systems because they integrated waste inputs over long time periods and reflected the movement of waste through the pelagic food chain.
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