河口近海的有机质及其低氧环境效应Organic matter and its hypoxia effect in the estuarine and coastal regions
发布日期: 2020/05/01

报告人:朱卓毅,华东师范大学河口海岸学国家重点实验室,副研究员

时间:9:00-10:00 ,周三,5/6/2020

地点:ZOOM直播,会议号:93670608703;密码:492085

 

报告简介:

在人类活动和气候变化双重驱动下,从低纬度到高纬度地区的河流都向近海施加了更大的物理和化学层面的影响。在富营养化背景下,流域盆地现场生产和之前冻存的有机质被大量释放并进入河口,对碳氮通量收支在关键界面的量化及分布动力学、近海生态系统物质基础的变化都带来新的压力。另外,过剩有机质在底层水的降解催生低氧问题,而这则加剧了生境的恶化,并反过来影响碳氮等生源要素的循环。以生物标志物为量化基础,报告人将从有机质成分为切入点,尝试在全球不同纬度尺度下,从选定的角度诠释有机质在河口近海的分布动力学特征。另外,作为有机质降解所伴随的低氧环境效应,报告还将从生物地球化学的视角,与大家分享报告人对长江口外低氧现象的发生机理、控制因素的研究成果,并介绍最新的研究进展。

Under the multi-stressor of both anthropogenic activities and climate changes, rivers are exerting stronger impact to adjacent seas worldwide. Give the background of eutrophication, the in situ produced organic matter, together with previously frozen organic matter, in the basin is released and emptied to estuaries and coastal zones in an increasing rate/extent. This acceleration of output raises challenges to the previously-balanced carbon and nitrogen budgets and dynamics. Furthermore, the degradation of extra organic matter in the near bottom waters induces hypoxia, which accelerates the deteriorating of ecosystem habitat, and in turn changing carbon and nitrogen cycling. Based on specific biomarkers and bulk concentrations, this talk basically focused on organic matter and its hypoxia effect in the estuarine and coastal region. The dynamics of estuarine and coastal organic matter is elucidated from certain perspectives, covering low, mediate and high latitudes. With respect to the hypoxia effect, I will share its mechanism and controlling factors from the perspective of biogeochemistry, and ended by introducing the latest research findings.

 

报告人介绍:

朱卓毅,华东师范大学河口海岸学国家重点实验室副研究员、博士生导师。研究专长为有机碳氮循环、水柱中的氧亏损效应。研究区域包括低纬度热带亚热带河口、中纬度温带大河口近海以及高纬度两极地区的河口近海。先后主持国家自然科学基金3项、国际科学基金1项,并作为学术骨干参与多项国家重点研发计划和自然基金委重点项目。在国际海洋化学主流期刊上发表SCI收录论文30余篇,以第一兼通讯作者发表SCI论文10余篇,其中单篇最高他引90余次。

Zhuoyi Zhu, associate professor in State Key Lab of Estuarine and Coastal Research, East China Normal University, Ph. D. supervisor. Research interests include organic carbon and nitrogen cycling, hypoxia. His research covers area from tropical/subtropical to temperate and polar estuaries and coastal seas. He was and is, in charge of 3 projects sponsored by the Natural Science Foundation Committee of China (NSFC), and 1 project from the International Foundation for Science (Sweden). He was/is also deeply involved in several National Key Research and Development Program of China (Ministry of Science and Technology, China) and Key Research Program from NSFC. Together with his coauthors, he has over 30 publications in SCI journals, in which he contributed over 10 as the first and corresponding author.

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