Phytoplankton production in the coastal water is to a large degree influenced by local hydrologic and meteorological factors, including fresh water runoff, wind mixing, tidal regime, as well as ice melting in the coastal areas. As for the open ocean the annual phytoplankton cycle could be divided into phases (winter, spring, summer, and autumn) as for the open areas. Along the Barents Sea coastal line there is large variation in the onset of the different phases along the Russian and Norwegian coast.
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Background Biotic components
Background Biotic components
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Biotic components
Zooplankton
In the Barents Sea ecosystem, zooplankton form a link between phytoplankton (primary producers) and fish, mammals and other organisms at higher trophic levels. The most abundant zooplankton species — calanoid copepods, krill, and hyperiid amphipods — form the major diet of herring, capelin, polar cod, and juveniles of other fish species. The Arctic front in the Barents Sea marks the boundary betwe...
Last Updated ( Wednesday, 03 February 2010 10:21 )
Read more...Benthos
More than 3,050 species of invertebrates inhabit the benthos of the Barents Sea (Sirenko, 2001). Total fauna biomass, including benthic species, generally increases near the Polar Front, in shallow regions, and near the edges of banks. The richest species diversity is found on sandy silts, and silty-sand floors. Lower biomass occurs in areas with limited upwelling, low primary production, reduced ...
Last Updated ( Wednesday, 06 January 2010 10:42 )
Read more...Benthos - Distribution and fluctuations in benthic communities
There has been a decline in the total biomass of benthos from 1924-1935 to 1968-1970 (Antipova, 1975b). This happened almost throughout the Barents Sea, and has been attributed to climate change by many investigators. The mechanism behind this biomass reduction is not clear, however. Some studies suggest that it is due to a change in faunal distribution during the cold period between the 1960s an...
Last Updated ( Friday, 22 January 2010 11:44 )
Read more...Benthos - Distribution of benthic abundance and biomass
The distributional pattern of benthos from different periods shows considerable variability, but demonstrates a number of more consistent features (Figure 2.4.8).
The areas with low abundance (less than 1000 individuals/ m2) and biomass (less than 10-25 g/m2) are usually restricted to bottom depressions such as the western deep-water areas in the Bear Island Channel and Hopen Deep, deep-water areas...
Last Updated ( Friday, 22 January 2010 11:44 )
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Status Report. The authors
More than 100 experts from a total of 9 Russian and 20 Norwegian institutions have participated in the preparation of the report, and the work has been organized in 13 expert groups. The work has been led by Sevmorgeo and PINRO on Russian side and on Norwegian side by the Institute of Marine Research and the Norwegian Polar Institute..
Find author name here...The Russian - Norwegian cooperation
BarentsPortal is a project developed under the Joint Russian - Norwegian Commission on Environmental Cooperation. The joint environmental report is a co-operation project between the Joint Russian - Norwegian Commission on Environmental Cooperation and the Joint Russian-Norwegian Fisheries Commission
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