Phytoplankton Blooms "Like It Colorful"(BLIC) - The relative influence of biodiversity and biotic interactions on the early stages of phytoplankton bloom formation

浮游植物水华“色彩缤纷”(BLIC) - 生物多样性和生物相互作用对浮游植物水华形成早期阶段的相对影响

基本信息

项目摘要

The global loss of biodiversity is also visible in aquatic ecosystems. How biodiversity affects ecosystem functions is mechanistically only partially understood. Such biodiversity - ecosystem function relationships are already documented at the level of primary producers; phytoplankton in pelagic systems. Phytoplankton is involved in about 50% of the global primary production, essentially controls global cycles of important elements and is the basis of important ecosystem services such as fisheries. Phytoplankton is characterized by a special dynamic, the ability to quickly accumulate large amounts of biomass. These so-called phytoplankton blooms can often occur on a regular basis (e.g., in spring, so-called spring blooms) and provide important food for higher trophic levels, or can be triggered by external factors (e.g., external nutrient supply, eutrophication). Phytoplankton blooms are usually supported by one or a few species; in the case of toxic or poorly edible species, blooms can have significant negative effects on the transfer of energy and matter in food webs. A question that has been studied essentially only theoretically is whether the diversity of phytoplankton communities has an impact on the formation of phytoplankton blooms. With increasing diversity, the probability that there is a species in the community that can monopolize resources and form blooms is higher (selection effect). At the same time, as diversity increases, complementarity and efficiency of resource use may increase, and it becomes increasingly difficult to monopolize resources (complementarity effect). BLIC is investigating this issue using a mechanistic up-scaling approach. In controlled laboratory experiments, increasingly diverse communities are exposed to nutrient pulses and the strength of selection effects and complementarity are quantified. In a next step, diversity-manipulated field communities will be exposed to nutrient pulses and investigated to what extent the change in diversity makes blooms more likely or not. Finally, mesocosm experiments are planned with natural phytoplankton communities along natural diversity gradients. All experiments will take place in the same way with marine and freshwater laboratory and field communities. Besides experimental approaches, the second pillar of BLIC is the theoretical model analysis of these research questions. So-called "trait" based multidimensional mathematical models will analyse in detail the early stages of phytoplankton blooms. The models will receive important parameterizations from the experiments and at the same time have an important influence on the execution of individual experiments, which can then investigate particularly interesting environmental combinations for bloom formation arising from the model in detail.
全球生物多样性的丧失在水生生态系统中也很明显。生物多样性如何影响生态系统的功能,只是部分了解。这种生物多样性与生态系统功能之间的关系已经在初级生产者一级得到了记录;在远洋系统中的浮游植物。浮游植物参与了全球约50%的初级生产,基本上控制着全球重要元素的循环,是渔业等重要生态系统服务的基础。浮游植物的特点是具有特殊的动态性,能够迅速积累大量的生物量。这些所谓的浮游植物水华通常会定期发生(例如,在春季,所谓的春季开花)并为更高的营养级提供重要的食物,或者可以由外部因素触发(例如,外部营养供应、富营养化)。浮游植物水华通常由一个或几个物种支持;对于有毒或食用性差的物种,水华可对食物网中的能量和物质转移产生重大负面影响。浮游植物群落的多样性是否对浮游植物水华的形成有影响,这是一个基本上只在理论上研究的问题。随着多样性的增加,群落中有一个物种能够垄断资源并形成水华的概率也就更高(选择效应)。同时,随着多样性的增加,资源利用的互补性和效率可能会提高,垄断资源变得越来越困难(互补效应)。BLIC正在使用一种机械的升级方法来调查这个问题。在受控实验室实验中,越来越多样化的社区暴露于营养脉冲,并量化选择效应和互补性的强度。下一步,多样性操纵的田间群落将暴露于营养脉冲,并调查多样性的变化在多大程度上使开花更有可能或不。最后,围隔实验计划与自然浮游植物群落沿着自然多样性梯度。所有实验都将以同样的方式在海洋和淡水实验室和实地社区进行。除了实验方法,BLIC的第二个支柱是这些研究问题的理论模型分析。所谓的“特征”为基础的多维数学模型将详细分析浮游植物水华的早期阶段。模型将从实验中获得重要的参数化,同时对单个实验的执行产生重要影响,然后可以详细研究模型引起的水华形成的特别有趣的环境组合。

项目成果

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Professor Dr. Herwig Stibor其他文献

Professor Dr. Herwig Stibor的其他文献

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{{ truncateString('Professor Dr. Herwig Stibor', 18)}}的其他基金

Genetic and ecological characterization of the invasive freshwater jellyfish Craspedacusta sowerbii
入侵淡水水母 Craspedacusta sowerbii 的遗传和生态特征
  • 批准号:
    275724984
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Auswirkungen der tagesperiodischen Vertikalwanderung von Zooplanktern auf die Lebensgemeinschaft des Pelagials
浮游动物昼夜垂直迁移对中上层群落的影响
  • 批准号:
    25023808
  • 财政年份:
    2006
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Einfluss von Mixotrophie auf Phytoplankton-Zooplankton Interaktion entlang von Nährstoff- und Lichtgradienten
混合营养对浮游植物-浮游动物沿营养物和光照梯度相互作用的影响
  • 批准号:
    14148968
  • 财政年份:
    2005
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Die Bedeutung von Omnivorie und Mixotrophie für die Nahrungskettenlänge und die Nahrungsnetzstruktur im limnischen Pelagial
杂食性和混合营养性对湖泊浮游生物的食物链长度和食物网结构的重要性
  • 批准号:
    5218475
  • 财政年份:
    2000
  • 资助金额:
    --
  • 项目类别:
    Research Grants

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淡水有害蓝藻水华预测的范式转变
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RII Track-4: @NASA: Next Generation Hyperspectral Approaches to Detect Harmful Algal Blooms
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STTR Phase I: Electrochemical Water Treatment Devices to Combat Harmful Algal Blooms
STTR 第一阶段:对抗有害藻华的电化学水处理装置
  • 批准号:
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Integrating top-down control by parasitic protists and fungi into the ecological dynamics of freshwater phytoplankton blooms
将寄生原生生物和真菌的自上而下控制纳入淡水浮游植物水华的生态动力学中
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ERI: Quantifying Inositol Phosphate Dephosphorylation to Understand the Role of Recalcitrant Organic Phosphorus Forms on Harmful Algal Blooms in Freshwater Systems
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Collaborative Research: Understanding the Massive Phytoplankton Blooms over the Australian-Antarctic Ridge
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Combining experiments, genomic tools, and an eco-evolutionary framework to understand the biotic basis of harmful algal blooms
结合实验、基因组工具和生态进化框架来了解有害藻华的生物基础
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