Nutrient Cycling in Permeable Continental Shelf Sediments Exposed to Light

暴露在光照下的可渗透大陆架沉积物中的养分循环

• 批准号: 9906897
• 负责人: Richard Jahnke
• 金额: --
• 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: 1999
• 资助国家: 美国
• 起止时间: 1999-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9906897&HistoricalAwards=false
• 关键词: Nutrient; Cycling; Permeable; Continental; Shelf

ABSTRACTOCE-9906987This work will investigate the cycling of nutrients in South Atlantic Bight (SAB) sediments, taking into consideration non-diffusive (i.e. advective, or current driven) transport between the pore water and overlying water as well as microalgal photosynthetic production in the sediment. The work will include examination of the processes that control pore water nutrient distributions and inventories, estimates of the benthic flux of nutrients, and estimates of the physically forced (non-diffusive) pore water exchange. The work will entail use of benthic chambers which will provide in-situ measurements of benthic flux, and a benthic peeper system which will provide measurements of sediment nutrient profiles. The results for the SAB will be compared to measurements on the West Florida shelf.

这项工作将研究南大西洋海湾(SAB)沉积物中营养物质的循环，考虑到孔隙水和上覆水之间的非扩散(即平流或流驱动)输送以及沉积物中微藻的光合作用产生。这项工作将包括对控制孔隙水营养物质分布和清单的过程的检查，对营养物质海底通量的估计，以及对物理强迫(非扩散)孔隙水交换的估计。这项工作将需要使用海底暗室，它将提供海底通量的现场测量，以及一个海底窥视系统，它将提供沉积物营养剖面的测量。SAB的结果将与西佛罗里达大陆架的测量结果进行比较。