Biogeochemical Cycling in the Organic-Rich Coastal Environment

富含有机物的沿海环境中的生物地球化学循环

• 批准号: 0002358
• 负责人: Christopher Martens
• 金额: $ 63万
• 依托单位: University of North Carolina at Chapel Hill
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-15 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0002358&HistoricalAwards=false
• 关键词: Biogeochemical; Cycling; Organic; Rich; Coastal

ABSTRACTOCE-0002358 A three pronged approach is outlined by the PIs to document the input and ultimate fate of organic matter in Cape Lookout Bight, North Carolina. In step one, the PIs will collect suspended matter using plate traps and surficial sediments to quantify the sources of modern, bomb radiocarbon-enriched organic matter, assess whether delivery varies seasonally and determine what percentage of the modern carbon from each source survives degradation in sulfate reducing and methane producing zones and is buried. The second goal of this project entails understanding the factors that control the chemical composition and molecular size distribution in porewater DOC, as well as conduct a pulse-tracer experiment to directly observe the flow of carbon into and through this DOC pool. Lastly, the PIs will focus on fermentation and terminal metabolism by sulfate reducing and methanogenic bacteria to ascertain the processes that consume low molecular weight DOC.

PIS概述了Abstractoce-0002358一种三种统治方法，以记录北卡罗来纳州Cape Lookout Bight的有机物的投入和最终命运。 在第一步中，PI将使用板陷阱和表面沉积物收集悬浮物，以量化现代的，炸弹放射性碳富含的有机物的来源，评估输送的季节性变化，并确定每个来源的现代碳的百分比在硫酸盐减少和甲烷的生产动物中的降解均降解。 该项目的第二个目标是了解控制孔隙水中的化学成分和分子尺寸分布的因素，并进行脉冲跟踪实验，以直接观察碳流入该DOC池的流动。 最后，PIS将通过硫酸盐还原和甲烷植物的细菌来关注发酵和末端代谢，以确定消耗低分子量DOC的过程。