Inhaltszusammenfassung

Toxicants still represent a relevant stressor in river ecosystems. We describe the entry paths of toxicants into rivers and discuss the processes that determine the levels of exposure. Subsequently, the impacts of chemical toxicants on different levels of biological organisation, ranging from individuals to meta-communities, are portrayed with a special emphasis on the propogation of effects through biotic interactions and the modulation of effects through environmental conditions ...Toxicants still represent a relevant stressor in river ecosystems. We describe the entry paths of toxicants into rivers and discuss the processes that determine the levels of exposure. Subsequently, the impacts of chemical toxicants on different levels of biological organisation, ranging from individuals to meta-communities, are portrayed with a special emphasis on the propogation of effects through biotic interactions and the modulation of effects through environmental conditions and potentially co-occurring stressors. We outline mitigation measures for different input paths that may reduce the concentrations of chemical toxicants, and consequently their risks to organisms, in river ecosystems. Finally, we discuss challenges and promising tools for a more realistic assessment of risks, which is the first step to an efficient management of chemicals in river ecosystems» weiterlesen» einklappen

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