作者单位：University of Jyvaskyla, Department of Biological and Environmental Science, P. O. Box 35, FIN-40014 Jyvaskyla of University, Finland[1]Finnish Environment Institute, Research Programme for Integrated River Basin Management, P. O. Box 413, FIN-90014, University of Oulu, Finland[2]Ecomonitor Ltd., Lansikatu 15, 80110 Joensuu, Finland[3]
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