Modelling the response of phytoplankton in a shallow lake (Loch Leven, UK) to changes in lake retention time and water temperature
Modelling the response of phytoplankton in a shallow lake (Loch Leven, UK) to changes in lake retention time and water temperature
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DOI：
10.1007/s10750-011-0930-y
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发表时间：
2011-11
期刊：
影响因子：
2.6
通讯作者：
J. Elliott;L. Defew
中科院分区：
文献类型：
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作者：
J. Elliott;L. Defew
浮游植物群落的洛赫利文在2005年进行了建模，并进行了不同的冲洗速率和水温的组合，以评估湖泊的敏感性，这两个气候驱动程序。虽然模拟的年平均总叶绿素证明相对不敏感，这些变化，在物种水平显着的变化记录。一些物种积极响应温度升高（如Aulacoseira），一些负面的（如Asterionella），而其他的负面影响增加流量（如隐球藻）和其他增强（如Stephanodiscus）。然而，这种与流量的关系是季节依赖的，例如，模拟增加夏季流入实际上有利于一些物种通过增加营养供应，而在潮湿的季节流量的同等增加会对这些物种产生负面影响（即通过冲洗损失）。总体而言，模拟结果表明，在社区模拟的物种类型的范围是足够的一个物种总是受益于本研究中应用的多个气候驱动因素所创造的不断变化的生态位。这种物种的开发水平仅受系统的养分承载能力的限制，这导致了在年度和季节尺度上总叶绿素测量的总体响应减弱。因此，虽然整体生物量相对较小的反应，两个气候驱动因素测试，浮游植物群落组成的显着反应。
The phytoplankton community of Loch Leven in 2005 was modelled and subjected to a combination of different flushing rates and water temperatures in order to assess the lake’s sensitivity to these two climatic drivers. Whilst the simulated annual mean total chlorophyllaproved relatively insensitive to these changes, at the species level marked changes were recorded. Some species responded positively to increased temperature (e.g.Aulacoseira), some negatively (e.g.Asterionella), whilst others were negatively affected by increased flow (e.g.Aphanocapsa) and others enhanced (e.g.Stephanodiscus). However, this relationship with flow was season dependent with, for example, a simulated increase in summer inflows actually benefiting some species through increased nutrient supply, whereas an equivalent increase in flow in wetter seasons would have negatively affected those species (i.e. through flushing loss). Overall, the simulations showed that the range of species types simulated in the community was sufficient for one species to always benefit from the changing niches created by the multiple climatic drivers applied in this study. The level of exploitation by such a species was only constrained by the nutrient carrying capacity of the system, which led to the overall dampened response in the total chlorophyllameasure, both at the annual and season scale. Thus, whilst overall biomass showed relatively little reaction to the two climatic drivers tested, the phytoplankton community composition responded markedly.