讲座题目：The Importance of Physical Transport Processes affecting Origins of Harmful Algal Blooms and Harmful Algal Bloom Simulation
主讲人：Jian Shen 教授
开始来源：pt真人平台 时间：2019-10-18 14:00:00
Dr. Jian Shen is a research professor of Virginia Institute of Marine Science, College of William and Mary. His research interests are Estuarine circulation, Transport timescale; numerical model simulations of hydrodynamics and water quality in estuaries and coastal sea, storm surge and inundation predictions, inverse modeling of estuarine water quality, and numerical modeling of watershed processes. He is also a member of American Geophysical Union.
The effects of physical transport processes on the initiation of harmful algal blooms (HABs) in estuaries were investigated through both mathematical model analysis and numerical model experiments. This study highlights the importance of the transport processes on HAB and interactions of physical and biological processes. The theoretical analysis suggests that the differential flushing effect at different waterbodies due to complex geometry is one of the dominant factors causing inhomogeneous distribution of algal density during HAB initiation. A HAB model has been developed for the tidal James River, which incorporates HAB behaviors such as mixotrophic growth, swimming behavior, cyst germination, and grazing suppression. Model simulations confirm the theoretical results and model results suggest that the mixotrophic growth is important to maintain a high growth rate of Cochlodinium polykrikoides in this region. Model results also show that both temperature and the flushing effect are the two dominant factors controlling the interannual variability in the timing of initiation of C. polykrikoides bloom in the Lafayette River, while the transport processes and unique circulation pattern in the James River plays a dominant role for HAB in the James River.