Phytoplankton response to climate warming modified by trophic state
[作者] Huber Veronika Rita Adrian Dieter Gerten
[单位] Leibniz-Institute of Freshwater Ecology and Inland Fisheries Potsdam Institute for Climate Impact Research
[摘要] We investigated the combined effect of reduced phosphorus supply and warmer winter and spring conditions on the diatom spring bloom of a shallow lake. Simulations with a simple dynamic model indicated that redu…
[关键词] Phytoplankton response climate warming modified trophic state
We investigated the combined effect of reduced phosphorus supply and warmer winter and spring conditions on the diatom spring bloom of a shallow lake. Simulations with a simple dynamic model indicated that reduced ice cover and increasing water temperatures resulted in a more intense and earlier bloom independently of phosphorous concentrations. However, whereas the collapse of the bloom was caused by silicate limitation under high phosphorus supply, it was caused by Daphnia grazing under reduced phosphorus supply. This switch from a bottom-up to a top-down driven collapse of the diatom spring bloom explains why, despite similarly mild winters, the bloom was observed earlier under high than under reduced phosphorus supply in the lake studied. Thus, an assessment of possible changes in nutrient loading is crucial when anticipating how phytoplankton could evolve under future climate warming.
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原文发布时间:2008/1/18
引用本文:
Huber;Veronika;Rita Adrian;Dieter Gerten.Phytoplankton response to climate warming modified by trophic state.http://ynufe.firstlight.cn/View.aspx?infoid=3365427&cb=Z10100000000.
发布时间:2008/1/18.检索时间:2024/12/15