Home >> Journal of Plankton Research, Volume 25, Number 1

Distribution of Calanus species in Kongsfjorden, a glacial fjord in Svalbard

Authors: Kwasniewski, Slawek1; Hop, Haakon2; Falk-Petersen, Stig2; Pedersen, Gunnar3

Source: Journal of Plankton Research, Volume 25, Number 1, January 2003 , pp. 1-20(20)

Publisher: Oxford University Press

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Abstract:

The distribution of Calanus species was investigated in Kongsfjorden in summer of 1996 and 1997. In both years Calanus finmarchicus and Calanus glacialis dominated, although the boreal C. finmarchicus was more abundant than the Arctic C. glacialis in 1997. This coincided with a 2°C higher water temperature at 50 m in 1997, indicating stronger influence of Atlantic origin water that year. Advected Calanus finmarchicus occurred in deep and subsurface layers of the outer fjord in 1996 (200 ind. m-3, mainly CIII). A less abundant local population aggregated in surface layers of the inner fjord (100 ind. m-3). Similarly, advected C. finmarchicus occurred in subsurface layers in 1997 (446 ind. m-3, mainly CIII and CIV) and a local population in surface layers (183 ind. m-3, mainly CI). Calanus glacialis in 1996 aggregated as CII and CIII in the deep layers of the outer fjord (272 ind. m-3), whereas CIII–CV were abundant (216 ind. m-3) in cold surface waters of the inner fjord. In 1997 C. glacialis (mostly CIII–CV) was more abundant in the outer than in the inner part of the fjord (40 and 192 ind. m-3, respectively). Within Kongsfjorden, Calanus finmarchicus needs one year to complete its life cycle, whereas Calanus glacialis needs two. Calanus hyperboreus seems to be an expatriate in the fjord system.

Document Type: Research article

Affiliations: 1: Institute of Oceanology, Polish Academy of Sciences, Powstancow Warszawy ST. 55, 81-712 Sopot, Poland, 2: Norwegian Polar Institute, N-9296 Tromsø and 3: Akvaplan-Niva, N-9296 Tromsø, Norway

Publication date: 2003-01-01

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  • Journal of Plankton Research publishes innovative papers that significantly advance the field of plankton research. All kinds of marine, brackish and freshwater plankton are considered: viruses, bacteria, fungi, phytoplankton, and zooplankton, including meroplankton and ichthyoplankton.
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