River ecosystems are threatened by multiple stressors, including habitat degradation,
pollution and invasive species. However, freshwater ecologists have largely disregarded the …

Background A variety of anthropogenic stressors influences the ecological status of rivers
wordwide. Important stressors include elevated concentrations of nutrients, salt ions, heavy …

The release of chemicals such as chlorinated solvents, pesticides and other xenobiotic
organic compounds to streams, either from contaminated sites, accidental or direct …

About 60% of Europe's rivers fail to meet ecological quality standards derived from
biological criteria. The causes are manifold, but recent reports suggest a dominant role of …

Freshwaters are among the most endangered ecosystems worldwide, due predominantly to
excessive anthropogenic practices compromising the future provisioning of ecosystem …

Conclusions. The development of tools and strategies for an identification of key toxicants on
a broader scale are a challenging task for the next years. Since investigations dealing with …

Regional assessments on large rivers often are complicated because these ecosystems
receive multiple, interacting effluent discharges. Confounding factors, such as complicated …

Mitigation activities to improve water quality and quantity in streams as well as stream
management and restoration efforts are conducted in the European Union aiming to improve …

We analyzed the detection frequencies and concentrations for 331 organic compounds
measured between 1994 and 2004 in the four largest rivers of north Germany, the Elbe …

Northern river ecosystems are subject to a variety of stressors having multifaceted (and
sometimes opposing) effects, making interpretation at a regional scale difficult. We have …