REU: Biogeochemical Cycling in the Organic-Rich Coastal Environment

本研究的目标是：1）识别过程 控制与硫酸盐相关的有机酸循环 在富含有机物的沉积物中的还原和甲烷生成：2） 了解季节性和非稳态变化的控制 在这些过程中;和，3）建立定量联系 在电子接受过程和输入之间， 特定类别的可代谢有机物的降解 化合物. 本研究共分为五个部分：一、研究 低分子量有机酸周转，ii）使用细菌 脂质醚作为缺氧环境中微生物过程的示踪剂 沉积物，三）粒度类别和组成的表征 溶解有机碳，iv）时间变化的研究 在有机物的输送和降解过程中;以及，v） 斜坡上部沉积物的早期成岩作用研究 工作 将在近岸海域、河口海域和 斜坡沉积环境。

The goals of this research are: 1) to identify processes controlling organic acid cycling associated with sulfate reduction and methanogenesis in organic-rich sediments: 2) to understand controls on seasonal and non-steady state variations in these processes; and, 3) to establish quantitative linkages between the electron accepting processes and the input and degradation of specific classes of metabolizable organic compounds. The research is divided into five sections: i) studies of low molecular weight organic acid turnover, ii) use of bacterial lipid ethers as tracers of microbial processes in anoxic sediments, iii) characterization of size classes and composition of dissolved organic carbon, iv) studies of temporal variations in organic matter delivery and degradation processes; and, v) studies of early diagenesis in upper slope sediments. The work will be carried out in nearshore marine, estuarine and upper slope sedimentary environments.