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Linking phytoplankton biodiversity and food quality effects in herbivore zooplankton

将浮游植物生物多样性与食草浮游动物的食品质量影响联系起来

基本信息

批准号：
246954372
负责人：
Professor Dr. Alexander Wacker
金额：
--
依托单位：
Professur für Tierökologie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2014
资助国家：
德国
起止时间：
2013-12-31 至 2021-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/246954372?language=en
关键词：
Linking phytoplankton biodiversity food quality

项目摘要

The objective of the submitted project is to integrate biodiversity effects into food quality research in order to understand responses of aquatic consumers to changing environmental conditions and accompanied changes in species richness. We aim to reveal beneficial or detrimental effects of phytoplankton diversity on life history traits of aquatic consumers by considering morphological, elemental and biochemical properties of the phytoplankton prey, using the freshwater keystone herbivore Daphnia as model organism. This includes the need of a better understanding of (A) how heterogeneity in food quality (morphology and bio/chemical composition) is linked to prey diversity, and (B) how heterogeneity in food quality is generated by interactions among phytoplankton species growing in differently diverse communities. We approach this by unraveling (I) the behavioural and physiological response of Daphnia (i.e., ingestion, digestion, assimilation, respiration, excretion, production, and reproduction) to different prey species richness levels, and (II) the role of morphological, elemental and biochemical properties of phytoplankton, which originates from a more diverse community composition, in triggering possible effects of higher prey diversity on Daphnia performance. This demands knowledge of the variation and species-specific adjustments in morphological, elemental and biochemical properties of phytoplankton interacting in differently diverse communities. Furthermore, we focus on changes in environmental factors such as light and nutrient availability that may affect the phytoplankton diversity. We address our aims by using laboratory experiments. Studying the above described mechanisms will lead to a better mechanistic understanding of the consequences associated with chances in phytoplankton diversity for the performance of aquatic consumers. We will gain insights on the origin of heterogeneity in the phytoplankton (primary producers) community and will enhance our knowledge on processes involved in changes in the bioavailability of essential bio/chemicals. The results will improve our ability to understand responses of important aquatic consumers to changing environmental conditions and accompanied changes in species richness. Further it will help to enable the establishment of predictive frameworks for biochemical limitations induced by deficiencies in fatty acids and sterols. These frameworks will specifically consider the biochemical heterogeneity in trophic interactions between primary producers and consumers.

提交的项目的目的是将生物多样性影响纳入食品质量研究，以了解水产消费者对不断变化的环境条件和伴随而来的物种丰富度变化的反应。以淡水关键食草动物水蚤（Daphnia）为模式生物，通过对浮游植物捕食对象的形态、元素和生化特性的研究，揭示浮游植物多样性对水生消费者生活史特征的有利或不利影响。这包括需要更好地理解（A）食物质量（形态和生物/化学成分）的异质性如何与猎物多样性联系在一起，以及（B）食物质量的异质性如何由生长在不同多样性群落中的浮游植物物种之间的相互作用产生。我们通过解开（I）水蚤的行为和生理反应（即，摄食，消化，同化，呼吸，排泄，生产和繁殖），以不同的猎物物种丰富度水平，和（II）的浮游植物的形态，元素和生化特性的作用，它起源于一个更多样化的社区组成，在触发可能的影响，更高的猎物多样性对水蚤性能。这就需要了解浮游植物在不同群落中相互作用的形态、元素和生化特性的变化和物种特异性调整。此外，我们专注于环境因素的变化，如光和营养盐的可用性，可能会影响浮游植物的多样性。我们通过实验室实验来实现我们的目标。研究上述机制将导致一个更好的机械理解的后果与浮游植物多样性的表现的机会，水生消费者。我们将深入了解浮游植物（初级生产者）群落异质性的起源，并将提高我们对基本生物/化学品生物利用度变化过程的了解。研究结果将提高我们理解重要的水产消费者对环境条件变化和伴随的物种丰富度变化的反应的能力。此外，它将有助于建立脂肪酸和甾醇缺乏引起的生物化学限制的预测框架。这些框架将特别考虑初级生产者和消费者之间营养相互作用的生物化学异质性。