The Effects of Animal-Sediment Interactions on Geochemical Processes near the Sediment-Water Interface

来自纽约州立大学石溪分校的两名研究人员将继续研究海底动物对沉积层中成岩反应速率、沉积物-水溶质交换和有机/矿物相储存的影响。为了实现这些目标，pi将重点研究以下三个相互关联的实验工作：(1)耦合氧化-缺氧反应的灌溉、扩散结构和最佳缩放；(2)溶洞衬里的扩散渗透性和沉积物中的黏液分泌物；(3)生物扰动带溶质的多维分布。这组科学家还计划在他们的辐射pH/O2传感器上增加二氧化碳和特定的外显酶传感器，并使用这些平面传感器技术在REMOTS着陆器系统上进行原位测量。本研究的长期目标将是建立一个模型，概述生物扰动带早期成岩作用期间发生的运输和反应平衡类型，并探索相应的元素循环和生态影响。

ABSTRACTOCE-0117062Two researcher from the State University of New York-Stony Brook will continue their research into the effects that bottom-dwelling animals have on the rates of diagenetic reactions, sediment-water solute exchange and storage of organic/mineral phases in sedimentary deposits. To achieve these objectives, the PIs will focus their research along the following three, interrelated experimental efforts: (1) irrigation, diffusion structure and optimal scaling of coupled oxic-anoxic reactions; (2) diffusive permeability of burrow linings and mucoid secretions in sediments; and (3) multi-dimensional solute distributions in the bioturbated zone. This team of scientists also plans to add CO2 and specific exoenzyme sensors to their radiometric pH/O2 sensor and use these planar sensor techniques for in-situ measurements on the REMOTS lander system. The long term goals of this research will be a model that outlines the types of transport and reaction balances occurring during early diagenesis in the bioturbated zone and an exploration of the corresponding elemental cycling and ecological implications.