Collaborative Research: Biogeochemical Cycling of Particulate and Dissolved Organic Matter in the Arctic Ocean using Molecular Markers

合作研究：利用分子标记对北冰洋颗粒物和溶解有机物进行生物地球化学循环

• 批准号: 0125316
• 负责人: Rodger Harvey
• 金额: $ 56.36万
• 依托单位: University of Maryland Center for Environmental Sciences
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-01-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0125316&HistoricalAwards=false
• 关键词: Collaborative; Research; Biogeochemical; Cycling; Particulate

The project combines field and experimental approaches to investigate the sources,transformations, transport, and fates of dissolved, particulate and sedimentary organic matter in theBeaufort and Chukchi Seas. This project will take advantage of the specificity that molecular organicmarkers of organisms and their processes can provide to understand how the Western Arctic shelvesproduce, metabolize and sequester carbon, a question central for the SBI program. The proposed studiesare closely linked with proposed research in other SBI phase II projects as well as international programs togive an integrated, pan-Arctic view of C and N cycling. The proposed research is directed by thefollowing central hypotheses: 1) On time scales of physical transport across the shelf-basin boundary and interior ocean (years to decades), terrestrial organic matter contains specific, conservative biomarkers that trace riverine discharge; 2) Biological processing in shelf waters dictates the molecular signatures of organic matter deposited in sediments and exported to the Basin; 3) Episodic marine primary production fuels benthic production.

该项目结合了实地和实验方法，调查波弗特海和楚科奇海溶解的、颗粒的和沉积的有机物的来源、转化、运输和命运。该项目将利用生物体及其过程的分子有机标志物的特异性来了解西北极大陆架如何产生，代谢和封存碳，这是SBI计划的核心问题。拟议的研究与SBI第二阶段其他项目以及国际计划中的拟议研究密切相关，以提供碳和氮循环的综合泛北极观点。本文的主要研究工作是基于以下几个假设：（1）关于陆棚-海盆边界和海洋内部物理输运的时间尺度（几年到几十年），陆地有机物含有特定的、保守的生物标志物，可以追踪河流排放; 2）陆架沃茨的生物处理决定了沉积在沉积物中并输出到盆地的有机物的分子特征; 3）间歇性海洋初级生产为底栖生产提供燃料。