INter- and intra-specific SIze Diversity of phytoplankton and its impacts on Ecosystem functions (INSIDE)

浮游植物的种间和种内大小多样性及其对生态系统功能的影响（内部）

• 批准号: 394518082
• 负责人: Dr. Esteban Acevedo-Trejos
• 金额: --
• 依托单位: Leibniz-Zentrum für Marine Tropenforschung (ZMT)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/394518082?language=en
• 关键词: INter; intra; specific; SIze; Diversity

Biodiversity has various impacts on production and re-circulation of energy and matter in an ecosystem. It is typically measured in terms of the number of species, albeit alternative metrics, such as functional trait diversity, can provide an effective quantitative basis to investigate relationships between biodiversity and ecosystem functions. Trait-based approaches have become very common in biodiversity research. Most studies, however, focus on inter-specific trait variations (driven by species composition), thus overlooking how intra-specific elements of trait variability (genotypic and phenotypic) affect the community structure and the resulting ecosystem functions. Here we propose a project that combines mathematical modelling with laboratory experiments to quantify the relative impacts of intra- and inter-specific trait diversity on the community structure and functioning of marine planktonic communities. We tackle this by performing experiments of natural community assemblages and mixtures of selected clones at different nutrient and grazing regimes, and in small (flasks) and large-scale (mesocosms) experimental settings. In parallel, an individual-explicit trait-based model will be developed to account for inter- and intra-specific variations of size diversity and to quantify the functional substitutability between the two levels of diversity. This synergistic approach will thus shed new light on the relevant mechanisms (shifts in species composition and genotypic and phenotypic variations) shaping biodiversity and ecosystem function relationships.

生物多样性对生态系统中能量和物质的生产和再循环有各种影响。它通常是根据物种的数量来衡量的，尽管其他衡量标准，如功能特征多样性，可以提供有效的量化基础来调查生物多样性和生态系统功能之间的关系。基于特征的方法在生物多样性研究中已经变得非常普遍。然而，大多数研究侧重于种间性状变异(由物种组成驱动)，从而忽视了种内性状变异因素(遗传型和表型)如何影响群落结构和由此产生的生态系统功能。在这里，我们提出了一个将数学建模与实验室实验相结合的项目，以量化种内和种间特征多样性对海洋浮游生物群落结构和功能的相对影响。我们通过在不同的营养和放牧制度下，以及在小(烧瓶)和大(中生)实验环境中，对选定克隆的自然群落组合和混合进行实验来解决这个问题。同时，将开发一个基于个体-显性特征的模型，以解释大小多样性的种间和种内差异，并量化两种水平的多样性之间的功能可替代性。因此，这种协同办法将对生物多样性和生态系统功能关系形成的相关机制(物种组成的变化以及基因和表型变异)作出新的解释。