Latitudinal and depth-related contrasts in enzymatic capabilities of pelagic microbial communities: Predictable patterns in the ocean?

远洋微生物群落酶能力的纬度和深度相关对比：海洋中的可预测模式？

• 批准号: 1332881
• 负责人: Carol Arnosti
• 金额: $ 57万
• 依托单位: University of North Carolina at Chapel Hill
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-01 至 2017-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1332881&HistoricalAwards=false
• 关键词: Latitudinal; depth; related; contrasts; enzymatic

Heterotrophic microbial communities are key players in the marine carbon cycle, transforming and respiring organic carbon, regenerating nutrients, and acting as the final filter in sediments through which organic matter passes before long-term burial. Microbially-driven carbon cycling in the ocean profoundly affects the global carbon cycle, but key factors determining rates and locations of organic matter remineralization are unclear. In this study, researchers from the University of North Carolina at Chapel Hill will investigate the ability of pelagic microbial communities to initiate the remineralization of polysaccharides and proteins, which together constitute a major pool of organic matter in the ocean. Results from this study will be predictive on a large scale regarding the nature of the microbial response to organic matter input, and will provide a mechanistic framework for interpreting organic matter reactivity in the ocean.Broader Impacts: This study will provide scientific training for undergraduate and graduate students from underrepresented groups. The project will also involve German colleagues, thus strengthening international scientific collaboration.

异养微生物群落是海洋碳循环的关键参与者，它们转化和呼吸有机碳、再生营养物质，并充当沉积物中有机物在长期埋藏之前经过的最终过滤器。海洋中微生物驱动的碳循环深刻影响着全球碳循环，但决定有机物再矿化速率和位置的关键因素尚不清楚。在这项研究中，北卡罗来纳大学教堂山分校的研究人员将研究远洋微生物群落启动多糖和蛋白质再矿化的能力，它们共同构成了海洋中有机物的主要池。这项研究的结果将大规模预测微生物对有机物输入的反应性质，并将提供解释海洋中有机物反应性的机制框架。 更广泛的影响：这项研究将为来自代表性不足群体的本科生和研究生提供科学培训。该项目还将涉及德国同事，从而加强国际科学合作。