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Primary production in relation to climatic changes in the Barents Sea

Rey, Francisco; Skjoldal, Hein Rune; Slagstad, Dag
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Primary production in relation to climatic changes.pdf (1.229Mb)
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http://hdl.handle.net/11250/107830
Issue date
1987
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  • Symposium proceedings [166]
Abstract
The Barents Sea is charaeterized by extreme environmental conditions that

have considerable infiuence on the biological development, especially during

spring. Based on physical and biological observations obtained during a six

years period and a mathematical model for phyto- and zooplankton, we have

examined the biological developmen t in relation to the climatie changes which

occurred during this period. The main effect of climatic variations is in

determining the timing of the phytoplankton spring bloom in the different

water masses, Warm years are characterized by a delayed phytoplankton bloom

and an earlier stage development of zooplankton in Atlantic waters, apparently

resulting in a higher proportion of the spring bloom being grazed and

channelized to higher pelagic trophic levels. Cold years, on the contrary, can

result In earller ice-edge spring bloom and late development of zooplankton ,

eausing a signlfieant portion of the primary production to be left ungrazed

and to sediment out to the deeper water layers and the bottom.
Description
The effect of oceanographic conditiond on disrtibution and population dynamics of commerical fish stocks in the Barents Sea. Proceedings of the third Soviet-Norwegian Symposium. Murmansk, 26-28 May 1986.
Series
PINRO-IMR Symposium
3

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