Estuarine Turbidity Maxima (ETM) in Land Margin Ecosystem: ETM Dynamics and the Impact of Anthropogenic Change

控制沿海环境中浮游植物、细菌和更高营养水平的分布和速率过程的因素对我国陆地边缘系统的适当描述和管理具有特别重要的意义。Simenstad博士及其同事将研究哥伦比亚河河口浊度最大值（ETM）的动态和人为影响。ETM被假设为促进和控制被捕获有机物质的微生物转化，并促进维持稠密的初级消费者群体，他们利用微生物循环获取食物。这个经验丰富的团队将承担多学科的工作，专注于系统的物理和生物学。预期这项工作将提供有关可能最终控制河口内生物成分的滞留和再循环的物理过程的宝贵资料。

The factors which control the distribution and rate processes of phytoplankton, bacteria and higher trophic levels in the coastal environment are of particular importance to the proper characterization and management of our nation's land-margin systems. Dr. Simenstad and colleagues will study the dynamics and impact of anthropogenic effects upon the estuarine turbidity maximum (ETM) in the Columbia River. The ETM is hypothesized to promote and control microbial conversion of entrapped organic material and to facilitate the maintenance of dense populations of primary consumers, which exploit the microbial loop for food. This well experienced team will undertake a multi-disciplinary effort focusing on the physics and biology of the system. It is expected that the effort will provide valuable information about the physical processes which may ultimately control the retention and recirculation of the biological components within the estuary.