Combined ecological risks of nitrogen and phosphorus in European freshwaters

Ligia B Azevedo1, Rosalie van Zelm2, Rob S E W Leuven2

  • 1Radboud University of Nijmegen, Institute for Water and Wetland Research, Department of Environmental Science, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands; International Institute for Applied Systems Analysis, Ecosystem Services and Management Program, Schlossplatz 1, A-2361 Laxenburg, Austria.

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