Projected impacts of 21st century climate change on diapause in Calanus finmarchicus

Wilson, Robert J. and Banas, Neil S. and Heath, Michael R. and Speirs, Douglas C. (2016) Projected impacts of 21st century climate change on diapause in Calanus finmarchicus. Global Change Biology, 22 (10). 3332–3340. ISSN 1354-1013 (https://doi.org/10.1111/gcb.13282)

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Abstract

Diapause plays a key role in the life cycle of high latitude zooplankton. During diapause animals avoid starving in winter by living in deep waters where metabolism is lower and met by lipid reserves. Global warming is therefore expected to shorten the maximum potential diapause duration by increasing metabolic rates and by reducing body size and lipid reserves. This will alter the phenology of zooplankton, impact higher trophic levels and disrupt biological carbon pumps. Here we project the impacts of climate change on the key North Atlantic copepod Calanus finmarchicus under IPCC RCP 8.5. Potential diapause duration is modelled in relation to body size and overwintering temperature. The projections show pronounced geographic variations. Potential diapause duration reduces by more than 30% in the Western Atlantic, whereas in the key overwintering centre of the Norwegian Sea it changes only marginally. Surface temperature rises, which reduce body size and lipid reserves, will have a similar impact to deep water changes on diapause in many regions. Because deep water warming lags that at the surface, animals in the Labrador Sea could offset warming impacts by diapausing in deeper waters. However, the ability to control diapause depth may be limited.

  • Item type:Article
    ID code:55940
    Dates:
    Date
    Event
    31 October 2016
    Published
    19 April 2016
    Published Online
    23 February 2016
    Accepted
    24 December 2015
    Submitted
    Notes:This is the peer reviewed version of the following article: Wilson, R.J., Banas, N.S., Heath, M.R., Speirs, D.C. (2016). Projected impacts of 21st century climate change on diapause in Calanus finmarchicus. Global Change Biology, 22(10), pp.3332-3340, which has been published in final form at http://dx.doi.org/10.1111/gcb.13282. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
    Subjects:Science > Mathematics > Probabilities. Mathematical statistics
    Geography. Anthropology. Recreation > Environmental Sciences
    Department:Faculty of Science > Mathematics and Statistics
    Depositing user: Pure Administrator
    Date deposited:17 Mar 2016 16:56
    Last modified:08 Apr 2024 22:35
    URI:https://strathprints.strath.ac.uk/id/eprint/55940
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