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globalchange > 过去全球变化的重建

DOI:	10.1371/journal.pone.0093035
论文题名:	Pacific Walrus (Odobenus rosmarus divergens) Resource Selection in the Northern Bering Sea
作者:	Chadwick V. Jay; Jacqueline M. Grebmeier; Anthony S. Fischbach; Trent L. McDonald; Lee W. Cooper; Fawn Hornsby
刊名:	PLOS ONE
ISSN:	1932-6203
出版年:	2014
发表日期:	2014-4-9
卷:	9, 期:4
语种:	英语
英文关键词:	Sea ice ; Bivalves ; Polynyas ; Site selection ; Biomass (ecology) ; Stomach ; Sediment ; Predation
英文摘要:	The Pacific walrus is a large benthivore with an annual range extending across the continental shelves of the Bering and Chukchi Seas. We used a discrete choice model to estimate site selection by adult radio-tagged walruses relative to the availability of the caloric biomass of benthic infauna and sea ice concentration in a prominent walrus wintering area in the northern Bering Sea (St. Lawrence Island polynya) in 2006, 2008, and 2009. At least 60% of the total caloric biomass of dominant macroinfauna in the study area was composed of members of the bivalve families Nuculidae, Tellinidae, and Nuculanidae. Model estimates indicated walrus site selection was related most strongly to tellinid bivalve caloric biomass distribution and that walruses selected lower ice concentrations from the mostly high ice concentrations that were available to them (quartiles: 76%, 93%, and 99%). Areas with high average predicted walrus site selection generally coincided with areas of high organic carbon input identified in other studies. Projected decreases in sea ice in the St. Lawrence Island polynya and the potential for a concomitant decline of bivalves in the region could result in a northward shift in the wintering grounds of walruses in the northern Bering Sea.
URL:	http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0093035&type=printable
Citation statistics:
资源类型:	期刊论文
标识符:	http://119.78.100.158/handle/2HF3EXSE/18114
Appears in Collections:	过去全球变化的重建影响、适应和脆弱性科学计划与规划气候变化与战略全球变化的国际研究计划气候减缓与适应气候变化事实与影响

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journal.pone.0093035.PDF（811KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	View Download

作者单位:

Alaska Science Center, U.S. Geological Survey, Anchorage, Alaska, United States of America;Chesapeake Biological Laboratory, University of Maryland Center for Environmental Science, Solomons, Maryland, United States of America;Alaska Science Center, U.S. Geological Survey, Anchorage, Alaska, United States of America;Western EcoSystems Technology, Inc., Laramie, Wyoming, United States of America;Chesapeake Biological Laboratory, University of Maryland Center for Environmental Science, Solomons, Maryland, United States of America;Western EcoSystems Technology, Inc., Laramie, Wyoming, United States of America

Recommended Citation:

Chadwick V. Jay,Jacqueline M. Grebmeier,Anthony S. Fischbach,et al. Pacific Walrus (Odobenus rosmarus divergens) Resource Selection in the Northern Bering Sea[J]. PLOS ONE,2014-01-01,9(4)

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