Climate and ecosystem linkages explain widespread declines in North American Atlantic salmon populations

© 2013 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 19(2013), 10 vom: 22. Okt., Seite 3046-61
1. Verfasser: Mills, Katherine E (VerfasserIn)
Weitere Verfasser: Pershing, Andrew J, Sheehan, Timothy F, Mountain, David
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2013
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article Research Support, U.S. Gov't, Non-P.H.S. Northwest Atlantic capelin chronological cluster analysis climate change dynamic factor analysis phytoplankton regime shift sea surface temperature zooplankton
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520 |a North American Atlantic salmon (Salmo salar) populations experienced substantial declines in the early 1990s, and many populations have persisted at low abundances in recent years. Abundance and productivity declined in a coherent manner across major regions of North America, and this coherence points toward a potential shift in marine survivorship, rather than local, river-specific factors. The major declines in Atlantic salmon populations occurred against a backdrop of physical and biological shifts in Northwest Atlantic ecosystems. Analyses of changes in climate, physical, and lower trophic level biological factors provide substantial evidence that climate conditions directly and indirectly influence the abundance and productivity of North American Atlantic salmon populations. A major decline in salmon abundance after 1990 was preceded by a series of changes across multiple levels of the ecosystem, and a subsequent population change in 1997, primarily related to salmon productivity, followed an unusually low NAO event. Pairwise correlations further demonstrate that climate and physical conditions are associated with changes in plankton communities and prey availability, which are ultimately linked to Atlantic salmon populations. Results suggest that poor trophic conditions, likely due to climate-driven environmental factors, and warmer ocean temperatures throughout their marine habitat area are constraining the productivity and recovery of North American Atlantic salmon populations 
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650 4 |a chronological cluster analysis 
650 4 |a climate change 
650 4 |a dynamic factor analysis 
650 4 |a phytoplankton 
650 4 |a regime shift 
650 4 |a sea surface temperature 
650 4 |a zooplankton 
700 1 |a Pershing, Andrew J  |e verfasserin  |4 aut 
700 1 |a Sheehan, Timothy F  |e verfasserin  |4 aut 
700 1 |a Mountain, David  |e verfasserin  |4 aut 
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