The influences of historic lake trophy and mixing regime changes on long-term phosphorus fraction retention in sediments of deep eutrophic lakes: a case study from Lake Burgäschi, Switzerland

Tu, Luyao; Zander, Paul; Szidat, Sönke; Lloren, Ronald; Grosjean, Martin

doi:https://doi.org/10.5194/bg-17-2715-2020

Articles | Volume 17, issue 10

https://doi.org/10.5194/bg-17-2715-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-17-2715-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 10

Research article

|

20 May 2020

Research article |

| 20 May 2020

The influences of historic lake trophy and mixing regime changes on long-term phosphorus fraction retention in sediments of deep eutrophic lakes: a case study from Lake Burgäschi, Switzerland

Luyao Tu, Paul Zander, Sönke Szidat, Ronald Lloren, and Martin Grosjean

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https://doi.org/10.5194/bg-17-2715-2020-supplement

Data sets

Geochemical parameters determined in sediment cores from Lake Burgäschi, Switzerland Luyao Tu, Paul Zander, Sönke Szidat, Ronald Lloren, and Martin Grosjean https://doi.org/10.1594/PANGAEA.908896

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Short summary

In a small, deep lake on the Swiss Plateau, net fluxes of labile P fractions in sediments that can be released to surface waters have been predominately controlled by past hypolimnetic anoxic conditions since the early 1900s. More than 40 years of hypolimnetic withdrawal can effectively reduce net P fluxes in sediments and internal P loads but not effectively decrease eutrophication. These findings should likely serve the management of deep eutrophic lakes in temperate zones.