Mechanisms, phenotypic plasticity and genotypic determination of thermal tolerance and related properties in Daphnia and Leptodora kindtii:: consequences for temperature impacts on food web interactions

水蚤和细纹藻耐热性及相关特性的机制、表型可塑性和基因型测定::温度对食物网相互作用影响的后果

• 批准号: 5429951
• 负责人: Professor Dr. Rüdiger J. Paul
• 金额: --
• 依托单位: Institut für Integrative Zellbiologie und Physiologie (IIZP)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2004
• 资助国家: 德国
• 起止时间: 2003-12-31 至 2007-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5429951?language=en
• 关键词: Mechanisms; phenotypic; plasticity; genotypic; determination

Global warming may have far-reaching effects on aquatic ecosystems through direct or indirect effects on the physiological systems of its members. The genus Daphnia plays a central role in the ecology of almost all standing freshwater, and Chaoborus larvae are prominent invertebrate predators of Daphnia. For a mechanistic understanding of thermal effects on Daphnia and Chaoborus larvae, field data analysis, physiological and biochemical investigations and retrospective studies will be brought together: investigation of the seasonal changes of phenotypic acclimatization as well as of clonal structure and clone-specific thermal tolerance will allow to evaluate future ecological consequences of global warming. The physiological and biochemical mechanisms and the degree of thermal tolerance as well as traits related to physiological fitness will be analysed and accordingly, costs or benefits of a changed thermal performance will be assessed. These results will be linked with the environmental conditions during the seasons. An understanding of the role of temperature for the performance and fitness of Daphnia and Chaoborus will allow to predict firstly, if specifically this prey-predator pair may grow apart from each other at global warming due to a mismatch of their thermal performances and capacities, and secondly, how the general properties or strategies of Daphnia at different temperatures will match the temporal abundance of food resources. A general view on Daphnia will be derived from the comparison of differently thermally adapted, yet closely related clones and species.

全球变暖可能通过直接或间接影响水生生态系统成员的生理系统而对水生生态系统产生深远影响。水蚤属在几乎所有的淡水生态中起着核心作用，而Chaoborus幼虫是水蚤属的主要无脊椎动物捕食者。为了从机制上理解热对水蚤和Chaoborus幼虫的影响，现场数据分析，生理和生化调查和回顾性研究将汇集在一起：调查表型驯化的季节变化以及克隆结构和克隆特异性耐热性将允许评估全球变暖的未来生态后果。将分析生理和生化机制和耐热性程度以及与生理适应性相关的性状，并相应地评估改变热性能的成本或效益。这些结果将与季节期间的环境条件联系起来。了解温度对水蚤和Chaoborus的性能和健身的作用将允许预测，首先，如果具体来说，这种捕食者-捕食者对可能会增长除了彼此在全球变暖，由于他们的热性能和能力的不匹配，其次，水蚤在不同温度下的一般属性或策略将如何匹配的时间丰富的食物资源。对水蚤的一般看法将来自不同的热适应，但密切相关的克隆和物种的比较。

项目成果

Seasonal and interannual changes in water temperature affect the genetic structure of a Daphnia assemblage (D. longispina complex) through genotype‐specific thermal tolerances

水温的季节性和年际变化通过基因型特定的热耐受性影响水蚤组合（D longispina 复合体）的遗传结构

• DOI: 10.4319/lo.2012.57.2.0619
• 发表时间: 2012
• 期刊: Limnology and Oceanography
• 影响因子: 4.5
• 作者: R. J. Paul;A. Mertenskötter;O. Pinkhaus;R. Pirow;U. Gigengack;I. Buchen;M. Koch;W. Horn;B. Zeis
• 通讯作者: B. Zeis