DISSERTATION RESEARCH: Elucidating stoichiometric and biogeochemical consequences of soil heterotrophic bacterial life history strategies

论文研究：阐明土壤异养细菌生活史策略的化学计量和生物地球化学后果

• 批准号: 1110513
• 负责人: Sarah Hobbie
• 金额: $ 1.5万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-06-01 至 2014-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1110513&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Elucidating; stoichiometric; biogeochemical

Mechanistic understanding of the relationship between microbial community structure and ecosystem function is the key to moving microbial ecology from an observation-based to a hypothesis-driven science. This project adapts a life history strategy framework developed in plants and animals to microbial ecology to enable mechanistic, hypothesis-driven examination of soil bacterial response to changes in environmental conditions. By examining individual species of soil bacteria and taking a whole-organism approach, this project investigates the role of tradeoffs between growth rate and efficiency on the nutrient requirements and biogeochemical consequences of growth across a diverse range of soil bacteria. This holistic approach allows generalizations to emerge from patterns in traits and genome allocation effectively defining bacterial life history strategies. Life history strategies allow generation of hypotheses at both the individual organism and bacterial community levels.Soil bacteria are responsible for the processing and recycling of the majority of C fixed in terrestrial environments. By defining life history strategies this project deepens understanding of the effects of changes in environmental conditions on soil microbial community dynamics and feedbacks affecting other ecosystem processes. The generalizations discovered in this project promise to be applicable not only in the field of ecosystem ecology, but anywhere understanding the mechanistic basis of microbial community function is important including bioremediation, synthetic ecology, and human health microbiology.

对微生物群落结构与生态系统功能之间关系的机械理解是将微生物生态学从基于观察的科学转移到假设驱动的科学的关键。该项目适应了在动植物中开发的生命历史策略框架，以实现微生物生态学，以实现机械性，假设驱动的土壤细菌对环境条件变化的反应的检查。通过检查土壤细菌的个别物种并采用全生物学方法，该项目研究了生长速度与效率之间的权衡对养分需求和生长的生物地球化学后果的作用。这种整体方法允许概括从特征和基因组分配的模式中出现，从而有效地定义了细菌的生活历史策略。生活历史策略允许在单个有机体和细菌群体层面上产生假设。土壤细菌负责在陆地环境中固定的大多数C的加工和回收。通过定义生活历史策略，该项目可以加深对环境条件变化对土壤微生物社区动态的影响和影响其他生态系统过程的反馈的影响。该项目中发现的概括有望不仅适用于生态系统生态学领域，而且在任何理解微生物社区功能的机理基础的任何地方都很重要，包括生物修复，合成生态学和人类健康微生物学。