Effects of Large & Small Scale Hydrodynamics on Phytoplankton Consumption by Filter-Feeding Benthic Bivalves

[504081] Monismith这一建议将水动力学、虹吸底栖动物的生态学和行为以及浮游植物动力学联系起来。最终目的是定量预测浮游植物生物量何时可以被这些底栖生物控制。这项研究将采用两项密切相关和互补的研究：实验室工作使用虹吸双壳类动物和活体动物的力学模型，计算工作使用两个耦合的流体动力学-浮游植物代码。这项研究将得到作为美国地质调查局正在进行的旧金山湾研究的一部分进行的实地工作的支助。实验室研究将调用两个元素：在模型双壳贝床上的湍流和标量混合，以及评估双壳贝行为（摄食策略和摄食动物密度）对机械模拟结果的改变程度。模拟研究将包括应用两个耦合的水动力-生物学模型来研究垂直和水平混合对浅水河口和海岸系统浮游植物生产和消耗的影响。

9504081 Monismith This proposal will link hydrodynamics, the ecology and behavior of siphonate benthic infauna, and phytoplankton dynamics. The ultimate objective is to quantitatively predict when phytoplankton biomass can be controlled by these benthic organisms. The research will employ two closely related and complementary studies: laboratory work with mechanical models of siphonate bivalves and with live animals, and computational work using two coupled hydrodynamic-phytoplankton codes. The research will be supported by field work carried out as part of the ongoing United States Geological Survey studies of San Francisco Bay. The laboratory studies will invoke two elements: turbulent and scalar mixing over a model bivalve bed and assessing the extent to which bivalve behavior (feeding strategies and densities of feeding animals) alters the results obtained with mechanical analogs. The modeling studies will include the application of two coupled hydrodynamic- biological models to study the effects of vertical and horizontal mixing on phytoplankton production and consumption in shallow estuarine and coastal systems.