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Research article2017Peer reviewedOpen access

Early life stages of the Arctic copepod Calanus glacialis are unaffected by increased seawater pCO(2)

Bailey, Allison; Thor, Peter; Browman, Howard I.; Fields, David M.; Runge, Jeffrey; Vermont, Alexander; Bjelland, Reidun; Thompson, Cameron; Shema, Steven; Durif, Caroline M. F.; Hop, Haakon

Abstract

As the world's oceans continue to absorb anthropogenic CO2 from the atmosphere, the carbonate chemistry of seawater will change. This process, termed ocean acidification, may affect the physiology of marine organisms. Arctic seas are expected to experience the greatest decreases in pH in the future, as changing sea ice dynamics and naturally cold, brackish water, will accelerate ocean acidification. In this study, we investigated the effect of increased pCO(2) on the early developmental stages of the key Arctic copepod Calanus glacialis. Eggs from wild-caught C. glacialis females from Svalbard, Norway (80 degrees N), were cultured for 2 months to copepodite stage C1 in 2 degrees C seawater under four pCO(2) treatments (320, 530, 800, and 1700 mu atm). Developmental rate, dry weight, and carbon and nitrogen mass were measured every other day throughout the experiment, and oxygen consumption rate was measured at stages N3, N6, and C1. All endpoints were unaffected by pCO(2) levels projected for the year 2300. These results indicate that naupliar development in wild populations of C. glacialis is unlikely to be detrimentally affected in a future high CO2 ocean.

Keywords

C:N; climate change; nauplii; ocean acidification; ontogeny; pH; respiration; zooplankton

Published in

ICES Journal of Marine Science
2017, Volume: 74, number: 4, pages: 996-1004 Publisher: OXFORD UNIV PRESS

    UKÄ Subject classification

    Oceanography, Hydrology, Water Resources
    Ecology

    Publication identifier

    DOI: https://doi.org/10.1093/icesjms/fsw066

    Permanent link to this page (URI)

    https://res.slu.se/id/publ/120102