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Marine Ecology Progress Series

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MEPS 517:85-104 (2014)  -  DOI:

Temperature effects on Calanus finmarchicus vary in space, time and between developmental stages

Kristina Øie Kvile1,*, Padmini Dalpadado2, Emma Orlova3,†, Nils C. Stenseth1, Leif C. Stige

1Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biosciences, University of Oslo, PO Box 1066 Blindern, 0316 Oslo, Norway
2Institute of Marine Research, PO Box 1870 Nordnes, 5817 Bergen, Norway
3Knipovich Polar Research Institute of Marine Fisheries and Oceanography, Knipovich-St. 6, 183763 Murmansk, Russia
*Corresponding author: Deceased

ABSTRACT: Temperature is considered one of the major factors shaping marine zooplankton distribution, abundance and phenology. During the past decades, the Barents Sea experienced strong temperature fluctuations, but previous studies have not identified a clear link between temperature and the dynamics of the key copepod species Calanus finmarchicus. We investigated associations between regional and local water temperature and C. finmarchicus abundance in Atlantic waters of the Norwegian and Barents Seas between 1959 and 1992. Results differed depending on the developmental stage, season and area, emphasising the value of detailed data series in climate effect studies. Abundances of copepodite stage CV and adult females showed no strong correlations with regional temperature indices, but were positively linked to local temperature in both spring and summer. For nauplii and young copepodite stages (CI-CIV), associations with both regional and local temperature estimates were positive in spring, but negative in summer. The results indicate that the phenology of young copepodites may be particularly responsive to climate change, which in turn may influence predators feeding on these life stages.

KEY WORDS: Barents Sea · Copepod · Climate change · Generalised additive models · Norwegian Sea · Seasonality · Temperature · Zooplankton

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Cite this article as: Kvile KØ, Dalpadado P, Orlova E, Stenseth NC, Stige LC (2014) Temperature effects on Calanus finmarchicus vary in space, time and between developmental stages. Mar Ecol Prog Ser 517:85-104.

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