10月18日 Jacqueline M. Grebmeier:Biological Time Series Observations in the Pacific Arctic: A Key to Understanding Ecosystem Change(68周年校庆系列学术报告)

来源:pt真人平台 时间:2019-10-10浏览:16设置


讲座题目:Biological Time Series Observations in the Pacific Arctic: A Key to Understanding   Ecosystem Change

主讲人:Jacqueline M. Grebmeier   教授

主持人:冯志轩  研究员

开始来源:pt真人平台 时间:2019-10-18 10:00:00

讲座地址:河口海岸大楼A204会议室

主办单位:河口海岸科学研究院

 

报告人简介:

Jacqueline Grebmeier is a Research Professor   at the University of Maryland Center for Environmental Sciences, Chesapeake   Biological Laboratory (CBL). She received an undergraduate degree (B.A.) in   Zoology from the University of California, Davis in 1977, a Master’s (M.S.)  degree in Biology from Stanford University in 1979, and a second M.S. degree in Marine Affairs from the University of Washington in 1983. She received a   Ph.D. in Biological Oceanography from the University of Alaska Fairbanks in   1987. Following an appointment as a postdoctoral associate at the University   of Southern California from 1987-1988, she affiliated with the University of   Tennessee in 1989 until she began her current position at CBL in 2008. Her   oceanographic research interests are related to pelagic-benthic coupling,  benthic carbon cycling, and benthic faunal population structure in relation   to ecosystem structure in polar marine systems. She has participated in more   than 55 field research cruises, primarily in the Arctic. She served as   project director and chief scientist for the US National Science Foundation   (NSF) and Office of Naval Research supported Shelf-Basin Interactions field   research program in the Beaufort and Chukchi Seas from 1999-2007. In   addition, she was involved in the Russian-American Long-term Census of the  Arctic (RUSALCA), supported by the US National Oceanic and Atmospheric   Administration (NOAA) and the Chukchi Sea Offshore Monitoring in Drilling   Area (COMIDA) program, supported by the US Bureau of Ocean Energy Management   (BOEM), the Bering Sea Program, supported by NSF and the North Pacific   Research Board, and the internationally coordinated Distributed Biological   Observatory (DBO) in the Arctic, supported by multiple agencies in the US and   international collaborators in the Pacific Arctic Group. She has served on   multiple advisory and review committees to the U.S. National Academy of  Sciences (NAS)/Polar Research Board, NSF, NOAA, BOEM, and Fish and Wildlife   Service, along with international boards. She was appointed by President   Clinton to the US Arctic Research Commission from 2000-2003 and she served as   the US delegate and one of four Vice-Presidents to the International Arctic   Science Committee (IASC) from 2006-2014. She has led the international DBO   program since 2010 in the Pacific Arctic, which is a network of international   collaborators who study ecosystem change and associated drivers in the  Arctic. She has received multiple awards, including the Alaska Ocean   Leadership Award from the Alaska SeaLife Center in 2015, the IASC Medal in   2015, the University of Maryland Center for Environmental Sciences   President’s Award for Excellence in Application of Science in 2017, and she   was elected a fellow of the American Association for the Advancement of   Science in 2018.


报告内容:

The Pacific Arctic region is experiencing   major reductions in seasonal sea ice and increases in sea surface   temperatures. A key question is how the marine ecosystem will respond to  these rapid environmental shifts. Variations in upper-ocean water   hydrography, stratification, light penetration, planktonic production,   pelagic-benthic coupling and sediment carbon cycling are all influenced by   sea ice and temperature changes. To evaluate these responses, the Distributed   Biological Observatory (DBO) was initiated in 2010 as a change detection   array for the identification and consistent monitoring of biophysical   responses to environmental change in the Arctic. The ecological trends   approach embedded in DBO sampling is facilitated by repeated sampling each   year through multiple international occupations of agreed-to transect lines,   along with more continuous data collections obtained through mooring and   satellite observations. This presentation will provide an overview of key   results observed during multiple cruises that have been part of the DBO  effort. In particular, biological changes in the northern Bering Sea   resulting from the dramatic reduction in winter sea ice and warming seawater   since 2018 are being linked to changes in the sediment-based prey for diving   seaducks, walruses, gray whales, and bottom-feeding fish.

 

 

 


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