Contrast of warm and cold phases in the Bering Sea to understand spatial distributions of Arctic and sub-Arctic gadids

The influence of climate on the dynamics of Arctic gadids is of increasing interest, particularly as research and survey effort expands in the Pacific Arctic. Understanding species-specific thermal tolerance may inform models of species distribution and projections of available habitat and also clar...

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Vydané v:Polar biology Ročník 44; číslo 6; s. 1083 - 1105
Hlavný autor: Baker, Matthew R.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Berlin/Heidelberg Springer Berlin Heidelberg 01.06.2021
Springer
Springer Nature B.V
Predmet:
Analysis
Biomedical and Life Sciences
Climate
Climate change
Climate effects
Cold
Distribution
Ecology
Environmental conditions
Fish
Fishes
Freshwater fishes
Gadus chalcogrammus
Gadus macrocephalus
Geographical distribution
Global warming
Habitat availability
Life history
Life Sciences
Marine fishes
Microbiology
Oceanography
Original Paper
Plant Sciences
Polar environments
Population density
Spatial distribution
Species
Surveying
Temperature tolerance
Thermal stress
Zoology
Bering Sea
Arctic region
Climate
Polar cod
Pacific cod
Habitat
Walleye pollock
Thermal tolerance
Saffron cod
Sea ice
ISSN:0722-4060, 1432-2056
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Popis
Shrnutí:The influence of climate on the dynamics of Arctic gadids is of increasing interest, particularly as research and survey effort expands in the Pacific Arctic. Understanding species-specific thermal tolerance may inform models of species distribution and projections of available habitat and also clarify implications of warming for ecological communities. Analyzing shifts in species distribution in warm and cold periods, this study considers the effects of a warming climate on the distribution of two keystone Arctic gadids (polar cod, saffron cod) and two commercially important sub-Arctic gadids (walleye pollock, Pacific cod). Shifts in distribution were used to derive temperature tolerance thresholds and to project how these species might react to a warming Arctic. Significant shifts were noted in comparisons of warm (2002–2005, 2014–2016, 2017–2018) and cold (2006–2013) periods. Sub-Arctic species expanded and contracted their range as environmental conditions shifted. In contrast, Arctic species appeared constrained, such that population densities increased or decreased within the same core geographic area. Additionally, species with a demersal life history were able to tolerate a wider range of thermal conditions. These results provide important insights on relative thermal tolerance of each species, differential influence of temperature on pelagic versus demersal life histories, and depth as thermal refuge. This study demonstrates both the need to understand the spatial response of fish to changing ocean conditions in polar regions and the utility of distributional analyses to inform that effort.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:0722-4060
1432-2056
DOI:10.1007/s00300-021-02856-x