Accelerated Water Quality Improvement during Oligotrophication in Peri-Alpine Lakes

详细信息    查看全文

• 作者：Beat M眉ller ; Ren茅 G盲chter ; Alfred W眉est
• 刊名：Environmental Science & Technology
• 出版年：2014
• 出版时间：June 17, 2014
• 年：2014
• 卷：48
• 期：12
• 页码：6671-6677
• 全文大小：472K
• 年卷期：v.48,no.12(June 17, 2014)
• ISSN：1520-5851

文摘

Monitoring of four eutrophic Swiss lakes undergoing oligotrophication during more than 25 years (i.e., gradually decreasing nutrient loading, productivity, and associated symptoms of eutrophication) revealed that phosphorus (P) net sedimentation rates (the fraction of a lake鈥檚 total P content that is buried within its sediments each year) and P export rates (the fraction of the lakes鈥?total P content that is exported via the outlet each year) increased as the lakes鈥?P contents decreased. These findings are of scientific as well as practical interest because they imply that, contrary to the hitherto prevailing view, the P concentration of eutrophic lakes will decrease more than proportional to the reduction of their external P load, and faster than predicted by the linear (eutrophic state-based) models.