Virus-bacteria-protist intercations under future ocean conditions

未来海洋条件下的病毒-细菌-原生生物相互作用

• 批准号: 172971687
• 负责人: Dr. Eckart Zöllner
• 金额: --
• 依托单位: Marine Microbiology Research Group
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/172971687?language=en
• 关键词: Virus; bacteria; protist; intercations; under

This project aims at improving the assessment and predictability of ocean biology feedbacks to expected climate change. In particular, the potential response patterns of temperate/arctic pelagic microbial food webs will be studied from a virus-oriented perspective. In order to obtain a mechanistic understanding of prospective responses and structuring mechanisms in microbial assemblages, small-scale perturbation experiments will be performed manipulating various relevant abiotic climate change stressors. While focusing on ocean warming, this project will particularly account for non-linear response patterns and (interactive) synergistic or antagonistic effects of warming in combination with other factors (e.g. nutrients, salinity). Using microbial communities of different complexity (e.g. size-fractionated in situ samples, cultures/virus-host systems), responses in biotic interactions (e.g. viral lysis, protist predation) to abiotic forcing will be investigated. Within a community ecological framework, experiments will analyse activity-diversity relationships and features such as stability and resilience. Changes in viral, bacterial and protist abundances will be detected and combined with molecular biological community analyses and a functional assemblage profiling. Moreover, these studies will be closely linked to a partner project of Dr. Julia Wohlers investigating the ultimate consequences of community changes for the associated biogeochemical cycling and microbial processing of organic matter.

该项目旨在改进海洋生物对预期气候变化的反馈的评估和可预测性。特别是，温带/北极浮游微生物食物网的潜在反应模式将从面向病毒的角度进行研究。为了获得在微生物组合的前瞻性反应和结构化机制的机械理解，小规模的扰动实验将进行操纵各种相关的非生物气候变化的压力。该项目在侧重于海洋变暖的同时，将特别考虑非线性反应模式以及变暖与其他因素（例如营养物、盐度）结合产生的（交互）协同或拮抗效应。使用不同复杂性的微生物群落（例如，大小分级的原位样品，培养物/病毒宿主系统），生物相互作用（例如，病毒裂解，原生生物捕食）对非生物胁迫的反应将被调查。在社区生态框架内，实验将分析活动-多样性关系和稳定性和复原力等特征。将检测病毒、细菌和原生生物丰度的变化，并结合分子生物群落分析和功能组合分析。此外，这些研究将与Julia Wohlers博士的一个合作项目密切相关，该项目调查了社区变化对相关生物地球化学循环和有机物微生物加工的最终后果。