11月20日：Using advanced technologies to monitor, detect and understand the drivers of harmful algal blooms in the Laurentain Great Lakes

报告人：Timothy Walter Davis 博士

主持人：邓泓 副教授

时  间：2015-11-20（周五）下午1:30

地  点：闵行校区生科辅楼119会议室

报告人简介：Timothy Walter Davis博士是加拿大自然科学与工程研究委员会的Research Fellow， 曾就职于加拿大内陆水环境研究中心、澳大利亚格里菲斯大学河流研究所等单位 ， 多篇文章发表于ES&T，PLoS ONE 、Harmful Algae 等期刊上。

报告简介：The speaker will present the results from long-term monitoring, microcosm experiments and advanced genetic techniques. Initial findings indicate that bloom biomass is P-limited in the lake proper during the early bloom stages and cellular nutrient limitation shifts from P to N in late summer.  Furthermore, CHABs that form in tributaries such as Sandusky Bay were primarily N limited throughout the bloom season. Finally, metagenomic and eco-transcriptomic results have shed light on why a non-N-fixing cyanobacterium (Planktothrix) can dominate in a chronically N limited system and reveal mechanisms that Microcystis can use to outcompete other phytoplankton during times of P limitation. All of these data indicate that while P is critical for initiating western Lake Erie CHABs, N may be more important for stimulating growth and toxin production in total, hence both N and P must be considered when developing nutrient mitigation strategies.