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

Research output: Contribution to journalArticle

14 Citations (Scopus)

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.
LanguageEnglish
Pages3332–3340
Number of pages9
JournalGlobal Change Biology
Volume22
Issue number10
Early online date19 Apr 2016
DOIs
Publication statusPublished - 31 Oct 2016

Fingerprint

diapause
twenty first century
Climate change
climate change
Water
Lipids
deep water
Animals
body size
lipid
overwintering
Global warming
Metabolism
zooplankton
warming
Life cycle
Carbon
Pumps
animal
Temperature

Keywords

  • Calanus finmarchicus
  • climate change
  • copepods
  • diapause
  • deep water temperature
  • macroecology
  • dormancy
  • overwintering

Cite this

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title = "Projected impacts of 21st century climate change on diapause in Calanus finmarchicus",
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.",
keywords = "Calanus finmarchicus, climate change, copepods, diapause, deep water temperature, macroecology, dormancy, overwintering",
author = "Wilson, {Robert J.} and Banas, {Neil S.} and Heath, {Michael R.} and Speirs, {Douglas C.}",
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Projected impacts of 21st century climate change on diapause in Calanus finmarchicus. / Wilson, Robert J.; Banas, Neil S.; Heath, Michael R.; Speirs, Douglas C.

In: Global Change Biology, Vol. 22, No. 10, 31.10.2016, p. 3332–3340.

Research output: Contribution to journalArticle

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AU - Banas, Neil S.

AU - Heath, Michael R.

AU - Speirs, Douglas C.

N1 - 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.

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AB - 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.

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