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Benthic Fluxes and Denitrification in Continental Shelf and Slope Sediments

大陆架和斜坡沉积物中的底栖通量和反硝化

基本信息

批准号：
8817109
负责人：
Allan Devol
金额：
$ 58.66万
依托单位：
University of Washington
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1989
资助国家：
美国
起止时间：
1989-02-01 至 1992-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8817109&HistoricalAwards=false
关键词：
Benthic Fluxes Denitrification Continental Shelf

项目摘要

Studies will be continued of benthic flux and benthic metabolism in continental shelf and slope sediments. These sediments frequently underlie areas of high primary production and this coupled with a short transit distance to the bottom results in high organic rain rates to the sediments. Consequently, continental margin sediments play an important role in controlling water column distributions and global balances of several elements. Benthic fluxes and processes related to the major bioactive elements will be measured to evaluate the importance of these processes in global elemental budgets. Specifically, three questions will be addressed: 1) what are carbon oxidation rates and associated benthic fluxes in continental shelf and slope sediments, 2) how important is denitrification in continental shelf and slope sediments in the marine combined nitrogen budget and, 3) how important are bioturbation and irrigation in enhancing and modifying benthic fluxes. The proposed work consists of modification of the existing benthic flux chamber Tripod for use as a free-vehicle. Field work will focus on the Washington State and Mexican continental margins. Due to the lack of oxygen in the overlying waters of the latter, comparison of the two areas will describe the importance of benthic macrofauna in flux enhancement and modification.

将继续研究海底通量和海底大陆架和斜坡沉积物中的代谢。这些沉积物经常位于初级生产力高的地区之下再加上到海底的距离很短导致沉积物中的高有机降雨率。因此，大陆边缘沉积物起着重要作用在控制水体分布和全球水平衡方面，几个元素。与海洋污染有关的底栖通量和过程主要生物活性元素将被测量，以评估这些过程在全球元素预算中的重要性。具体而言，将解决三个问题：1）什么是碳氧化率和相关的底栖生物通量大陆架和斜坡沉积物，2）有多重要大陆架和斜坡沉积物中的反硝化作用海洋氮平衡，3）重要性如何生物扰动和灌溉，剂. 拟议的工作包括修改现有的底栖通量室三脚架用作自由车辆。实地工作将集中在华盛顿州和墨西哥大陆边缘由于上层大气缺氧对后者的沃茨，将两方面进行比较说明大型底栖动物在通量增加方面的重要性，改性