Comparative community genome analysis of eastern north Pacific coastal and open ocean oxygen minimum zones

北太平洋东部沿海和公海氧气最低区的比较群落基因组分析

• 批准号: 356988-2007
• 负责人: Hallam, Steven
• 金额: $ 7.1万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects Supplemental Competition
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=366455
• 关键词: Comparative; community; genome; analysis; eastern

We are submitting this proposal as part of the Healthy Environment and Ecosystem target area under the special NSERC Strategic project grant initiative. Our specific research topic is Ecosystem Adaptation, Interventions and Modeling in the context of marine oxygen minimum zones (OMZs). OMZs are areas of low dissolved oxygen concentrations that play a major role in biogeochemical cycling within the world's oceans.  They are major sinks for nitrogen and sources for the greenhouse gases carbon dioxide and nitrous oxide. Therefore, microbial mediated biological activity associated with these systems impacts the productivity of the deep blue sea and global climate balance. There is increasing evidence that ocean warming trends will decrease dissolved oxygen concentrations within the coastal and interior regions of the Eastern North Pacific causing an expansion of the hypoxic boundary layer. This expansion will have a direct effect on coastal benthic ecosystems and the productivity of marine fisheries due to habitat loss and changes in nutrient cycling. In order to understand, respond to, or mitigate these transitions it is imperative that studies to monitor and model microbial dynamics in relation to physical and chemical oceanographic parameters be put into place. To this end, we are seeking support from NSERC to chart the genomic diversity of indigenous microbial communities found in coastal and open ocean OMZs in the Eastern North Pacific Ocean. The goals of this research program promise to provide a solid comparative genomic foundation for understanding the biogeochemical processes at work in marine OMZs around the globe, in addition to identifying and describing the key microbial players and biochemical pathways contributing to carbon and nitrogen metabolism within the Eastern North Pacific Ocean.

我们正在提交这一建议的一部分，健康的环境和生态系统的目标领域下的特殊NSERC战略项目赠款倡议。我们的具体研究课题是海洋氧气最小区（OMZs）背景下的生态系统适应，干预和建模。有机姆带是溶解氧浓度低的区域，在世界海洋的地球化学循环中发挥着重要作用，是氮的主要汇，也是温室气体二氧化碳和一氧化二氮的主要来源。因此，与这些系统相关的微生物介导的生物活动影响着深海的生产力和全球气候平衡。越来越多的证据表明，海洋变暖的趋势将减少东北太平洋沿海和内陆地区的溶解氧浓度，导致缺氧边界层的扩大。由于生境丧失和养分循环的变化，这种扩张将对沿海底栖生态系统和海洋渔业生产力产生直接影响。为了理解、应对或减轻这些转变，必须开展研究，监测和模拟与物理和化学海洋学参数有关的微生物动力学。为此，我们正在寻求NSERC的支持，以绘制在北太平洋东部沿海和公海OMZ中发现的土著微生物群落的基因组多样性。这项研究计划的目标，承诺提供一个坚实的比较基因组基础，了解海洋OMZ工作在地球仪周围的地球化学过程，除了确定和描述的关键微生物球员和生化途径，有助于碳和氮代谢在东北太平洋。