Beyond the mean: phytoplankton responses to fluctuating resource and energy supply

超越平均值：浮游植物对资源和能源供应波动的反应

• 批准号: 432851718
• 负责人: Privatdozentin Dr. Maren Striebel
• 金额: --
• 依托单位: Institut für Chemie und Biologie des Meeres (ICBM)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/432851718?language=en
• 关键词: Beyond; mean; phytoplankton; responses; fluctuating

Environmental changes do not only alter mean conditions but also the temporal and spatial variance around these conditions (e.g., temperature variance, nutrient pulses). Concerning the combined effects of resource and temperature fluctuations, some fundamental studies exist on how pulsed (versus constant) resource supply alters community composition and performance. However, these considerations have rarely – if ever – been placed in a warming-resource context, and none of the studies are explicitly addressing fluctuations in more than one dimension. This proposal addresses the consequence of fluctuations in temperature, light and nutrients for monocultures and communities of freshwater phytoplankton. The species-specific information serves to make predictions at the community level, allowing us to test how fluctuation effects might be buffered in multispecies communities. The originality of the project lies in our approach to assess the interactive effect of fluctuating resources (nutrients and light) and fluctuating temperature on freshwater phytoplankton. To understand the underlying mechanisms, we will manipulate both the frequency and the amplitude of fluctuations. Thereby we address the knowledge gap how simultaneous fluctuations in resources and energy will alter phytoplankton growth, resource use and biomass yield.

环境变化不仅改变了平均条件，而且改变了这些条件周围的时间和空间变化（例如，温度变化，营养脉冲）。关于资源和温度波动的综合影响，一些基本的研究存在脉冲（与恒定）资源供应如何改变社区的组成和性能。然而，这些考虑很少--如果有的话--被放在变暖资源的背景下，没有一项研究明确地解决一个以上维度的波动问题。该提案涉及温度、光照和营养物波动对淡水浮游植物单一养殖和群落的影响。物种特异性信息用于在群落水平上进行预测，使我们能够测试波动效应如何在多物种群落中缓冲。该项目的独创性在于我们的方法来评估波动的资源（养分和光）和波动的温度对淡水浮游植物的相互作用。为了理解潜在的机制，我们将操纵波动的频率和幅度。因此，我们解决的知识差距如何同时波动的资源和能源将改变浮游植物的生长，资源利用和生物量产量。