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Response of Bacterial Diversity of Increased Productivity

细菌多样性对生产力提高的反应

基本信息

批准号：
9907797
负责人：
Brendan Bohannan
金额：
$ 3.5万
依托单位：
Stanford University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1999
资助国家：
美国
起止时间：
1999-07-01 至 2001-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9907797&HistoricalAwards=false
关键词：
Response Bacterial Diversity Increased Productivity

项目摘要

9907797BohannanMany ecologists believe that productivity (the rate at which energy flows in an ecological system) is one of the most pervasive influences on animal and plant diversity. However, very little is known about the relationship between productivity and microbial diversity. Recent preliminary observations in aquatic mesocosms suggest that bacterial diversity may respond to changes in productivity very differently from plant and animal diversity. The research conducted under this Postdoctoral Fellowship Starter Grant will confirm these preliminary observations and also test whether the pattern observed was 1) an artifact of sample size or experimental design, 2) due to the different relative scales at which bacterial diversity and plant and animal diversity were measured, or 3) due to a fundamentally different relationship between productivity and diversity for bacteria. This will be accomplished by estimating bacterial diversity in additional mesocosm samples and in samples from ponds that vary in productivity, and by repeating the mesocosm experiments on a smaller scale and with a broader range of productivity levels. Microorganisms represent most of the earth's biodiversity and play a crucial role in almost all environmental processes. Understanding how microbial diversity is regulated in nature is thus of great importance. This research has the potential to generate fundamental new knowledge about the most diverse and most abundant organisms on earth.

9907797Bohannan许多生态学家认为，生产力（生态系统中能量流动的速率）是对动植物多样性最普遍的影响之一。然而，人们对生产力和微生物多样性之间的关系知之甚少。最近对水生中生态系统的初步观察表明，细菌多样性对生产力变化的反应可能与植物和动物多样性截然不同。在该博士后奖学金启动资助下进行的研究将证实这些初步观察结果，并测试观察到的模式是否是1）样本大小或实验设计的人为因素，2）由于测量细菌多样性和植物和动物多样性的相对规模不同，或3）由于细菌生产力和多样性之间根本不同的关系。这将通过估计额外的中生态样品和生产力不同的池塘样品中的细菌多样性，并通过在更小规模和更广泛的生产力水平上重复中生态实验来实现。微生物代表了地球上大部分的生物多样性，并在几乎所有环境过程中发挥着至关重要的作用。因此，了解自然界中微生物多样性是如何调节的非常重要。这项研究有可能产生关于地球上最多样化和最丰富的生物体的基本新知识。