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Community reorganization in the Gulf of Alaska following ocean climate regime shift

Marine Ecology Progress Series

By:
,
DOI: 10.3354/meps189117

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Abstract

A shift in ocean climate during the late 1970s triggered a reorganization of community structure in the Gulf of Alaska ecosystem, as evidenced in changing catch composition on long-term (1953-1997) small-mesh trawl surveys. Forage species such as pandalid shrimp and capelin declined because of recruitment failure and predation, and populations have not yet recovered. Total trawl catch biomass declined >50% and remained low through the 1980s. In contrast, recruitment of high trophic-level groundfish improved during the 1980s, yielding a >250% increase in catch biomass during the 1990s. This trophic reorganization apparently had negative effects on piscivorous sea birds and marine mammals.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Community reorganization in the Gulf of Alaska following ocean climate regime shift
Series title:
Marine Ecology Progress Series
DOI:
10.3354/meps189117
Volume
189
Year Published:
1999
Language:
English
Publisher:
Inter-Research
Contributing office(s):
Alaska Biological Science Center
Description:
pp. 117-123
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
117
Last page:
123
Number of Pages:
7