12月1日的午餐交流会，将由郭卫东教授邀请的沈渊博士生主讲。详情如下：
主题：第二十三讲——Dissolved organic matter composition reflects ecosystem productivity
主讲人：沈渊博士生，美国南卡罗来纳大学海洋科学系（自2012年起师从国际知名DOM研究专家Ron Benner教授）
时间：2014年12月1日（星期一）11:40-13:30（12:20开讲）
地点：周隆泉楼一楼多功能厅
Dissolved organic matter composition reflects ecosystem productivity
Marine Science Program, University of South Carolina, Columbia, SC 29208 USA
Dissolved organic matter (DOM) in the ocean stores nearly as much carbon (~700×1015 g) as the atmosphere. The imbalance between its production and remineralization influences carbon sequestration and thereby the global carbon cycle. The fate of DOM is largely controlled by the composition and biological availability of DOM, which is not apparent from the bulk DOM concentrations. The bioavailability of DOM is commonly determined by labor-intensive bioassay experiments. Alternatively, molecular analyses of specific biochemical components of DOM (e.g., amino acids and neutral sugars) can provide qualitative and quantitative insights about the bioavailability of DOM. This approach allows for studies with much broader spatial and temporal coverage and therefore provides great potential to investigate the dynamics of DOM in response to ecosystem and climate changes. In this talk, I will present data from the Arctic Ocean, a vulnerable system affected by the changing climate, to illustrate the linkages between ecosystem productivity, bioavailability of DOM, and shelf-basin interaction.
沈渊其简历及讲座摘要请见附件。
本次午餐会将为报名参加的师生提供午餐，所有午餐会的报名都通过网络进行。请老师同学们访问MEL网页（http:/lecture.asp?id=1），在本次午餐会的“报名”一栏填写并提交。
讲座发布的第一天，仅开放给科研人员、技术人员、博士后、访问学者等教师优先报名，第二天起开放给全体师生报名。学生应在规定时间内报名，如提前以教师的名义报名，将导致报名无效。
11月28日（本周五）下午4点为截止报名时间，总报名人数限制在100名以内。如未及时报上名，可于12:20直接到场听报告。如已报名但因事不能参加，也请在周五下午4点前告知。
