Biogeographic responses of the copepod Calanus glacialis to a changing Arctic marine environment
Date
2017-08-24Author
Feng, Zhixuan
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Ji, Rubao
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Ashjian, Carin J.
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Campbell, Robert G.
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Zhang, Jinlun
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Metadata
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https://hdl.handle.net/1912/9211As published
https://doi.org/10.1111/gcb.13890Keyword
Arctic Ocean; Marine ecosystem; Climate change; Copepod; Biogeography; Ocean warming; Poleward range shift; Individual-based modelAbstract
Dramatic changes have occurred in the Arctic Ocean over the past few decades,
especially in terms of sea ice loss and ocean warming. Those environmental changes may modify
the planktonic ecosystem with changes from lower to upper trophic levels. This study aimed to
understand how the biogeographic distribution of a crucial endemic copepod species, Calanus
glacialis, may respond to both abiotic (ocean temperature) and biotic (phytoplankton prey)
drivers. A copepod individual-based model coupled to an ice-ocean-biogeochemical model was
utilized to simulate temperature- and food-dependent life cycle development of C. glacialis
annually from 1980 to 2014. Over the 35-year study period, the northern boundaries of modeled
diapausing C. glacialis expanded poleward and the annual success rates of C. glacialis
individuals attaining diapause in a circumpolar transition zone increased substantially. Those
patterns could be explained by a lengthening growth season (during which time food is ample)
and shortening critical development time (the period from the first feeding stage N3 to the
diapausing stage C4). The biogeographic changes were further linked to large scale oceanic
processes, particularly diminishing sea ice cover, upper ocean warming, and increasing and
prolonging food availability, which could have potential consequences to the entire Arctic
shelf/slope marine ecosystems.
Description
Author Posting. © The Author(s), 2017. This is the author's version of the work. It is posted here under a nonexclusive, irrevocable, paid-up, worldwide license granted to WHOI. It is made available for personal use, not for redistribution. The definitive version was published in Global Change Biology 24 (2018): e159-e170, doi:10.1111/gcb.13890.
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Suggested Citation
Preprint: Feng, Zhixuan, Ji, Rubao, Ashjian, Carin J., Campbell, Robert G., Zhang, Jinlun, "Biogeographic responses of the copepod Calanus glacialis to a changing Arctic marine environment", 2017-08-24, https://doi.org/10.1111/gcb.13890, https://hdl.handle.net/1912/9211Related items
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