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Benthic Microalgal Production and Nutrient Dynamics on the Georgia Continental Shelf

乔治亚大陆架底栖微藻生产和营养动态

基本信息

批准号：
9416064
负责人：
James R Nelson
金额：
$ 48.5万
依托单位：
Skidaway Institute of Oceanography
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1995
资助国家：
美国
起止时间：
1995-01-15 至 1997-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9416064&HistoricalAwards=false
关键词：
Benthic Microalgal Production Nutrient Dynamics

项目摘要

9416064 Eckman Recent evidence suggests that the areal biomass and productivity of benthic microflora on the SAB shelf can be comparable to, or exceed, that of phytoplankton through much of the year. in the project Dr. Eckman and collaborators will assess the importance of benthic primary production and its role in the biogeochemistry of the South Atlantic Bight shelf sediments. It is important to understand the magnitude of benthic primary production, its variability in space and time, and factors affecting benthic primary production, because present models of continental shelf export, biogeochemical cycles, and response to global change do not include a contribution of organic matter from benthic primary production. The principal objectives of the proposed study are: 1) to quantify the spatial and seasonal variability of benthic microfloral biomass and productivity on the SAB shelf; 2) to measure phytoplankton biomass and primary production in the water column overlying the sediments so that the relative role of seafloor microflora on the continental shelf any be determined; 3) to examine the impact of benthic primary production on solute exchanges between the sediments and the water column of the shelf; and 4) to identify and quantify the physical, biological and chemical properties of the shelf environment that may influence benthic microalgal biomass, primary production, and solute fluxes between the sediments and the water column.

小行星9416064 最近的证据表明，面积生物量和生产力的SAB货架上的底栖微生物可以媲美，或超过，浮游植物通过一年中的大部分时间。在该项目中，Eckman博士及其合作者将评估底栖生物初级生产的重要性及其在南大西洋海湾陆架沉积物地球化学中的作用。必须了解底栖初级生产的规模、其在空间和时间上的可变性以及影响底栖初级生产的因素，因为目前的大陆架输出、生物地球化学循环和对全球变化的反应模式并不包括底栖初级生产的有机物质的贡献。拟议研究的主要目标是：（1）量化SAB大陆架海底微生物区系生物量和生产力的空间和季节变化;（2）测量沉积物上覆水柱中的浮游植物生物量和初级生产力，以便确定海底微生物区系在大陆架上的相对作用; 3）研究底栖生物初级生产力对陆架沉积物和水柱之间溶质交换的影响;和4）查明和量化可能影响底栖微藻生物量、初级生产以及沉积物和水柱之间的溶质通量。