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Open AccessArticle

Climate Change Will Make Recovery from Eutrophication More Difficult in Shallow Danish Lake Søbygaard

Department of Bioscience, Aarhus University, Vejlsøvej 25, P.O. Box 314, 8600 Silkeborg, Denmark
Sino-Danish Centre for Education and Research (SDC), University of Chinese Academy of Sciences, 100190 Beijing, China
Greenland Climate Research Centre (GCRC), Greenland Institute of Natural Resources, Kivioq 2, P.O. Box 570, 3900 Nuuk, Greenland
Arctic Centre (ARC), Aarhus University, 8000 Aarhus C, Denmark
PBL Netherlands Environmental Assessment Agency, P.O. Box 303, NL-3720 AH Bilthoven, The Netherlands
Department of Aquatic Ecology, Netherlands Institute of Ecology, P.O. Box 50, 6700 AB Wageningen, The Netherlands
Aquatic Ecology and Water Quality Management Group, Department of Environmental Sciences, Wageningen University, P.O. Box 47, 6700 AA Wageningen, The Netherlands
Authors to whom correspondence should be addressed.
Academic Editor: Benoit Demars
Water 2016, 8(10), 459;
Received: 11 September 2016 / Revised: 27 September 2016 / Accepted: 8 October 2016 / Published: 17 October 2016
(This article belongs to the Special Issue Lake Restoration and Management in a Climate Change Perspective)
Complex lake ecosystem models can assist lake managers in developing management plans counteracting the eutrophication symptoms that are expected to be a result of climate change. We applied the ecological model PCLake based on 22 years of data from shallow, eutrophic Lake Søbygaard, Denmark and simulated multiple combinations of increasing temperatures (0–6 °C), reduced external nutrient loads (0%–98%) with and without internal phosphorus loading. Simulations suggest nitrogen to be the main limiting nutrient for primary production, reflecting ample phosphorus release from the sediment. The nutrient loading reduction scenarios predicted increased diatom dominance, accompanied by an increase in the zooplankton:phytoplankton biomass ratio. Simulations generally showed phytoplankton to benefit from a warmer climate and the fraction of cyanobacteria to increase. In the 6 °C warming scenario, a nutrient load reduction of as much as 60% would be required to achieve summer chlorophyll-a levels similar to those of the baseline scenario with present-day temperatures. View Full-Text
Keywords: climate change; shallow lakes; ecosystem model; PCLake; water quality climate change; shallow lakes; ecosystem model; PCLake; water quality
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Rolighed, J.; Jeppesen, E.; Søndergaard, M.; Bjerring, R.; Janse, J.H.; Mooij, W.M.; Trolle, D. Climate Change Will Make Recovery from Eutrophication More Difficult in Shallow Danish Lake Søbygaard. Water 2016, 8, 459.

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