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Oceanology

, Volume 58, Issue 5, pp 700–709 | Cite as

Phytoplankton Community Structure in the Polar Front of the Eastern Barents Sea at the End of the Growth Season

  • V. M. SergeevaEmail author
  • L. S. Zhitina
  • S. A. Mosharov
  • A. A. Nedospasov
  • A. A. Polukhin
Marine Biology
  • 32 Downloads

Abstract

Phytoplankton community and its distribution were investigated in the south part of the Polar Front in the eastern Barents Sea in October 2014. Analysis of the spatial differences in the phytoplankton structure was performed in connection with changes of the temperature, salinity and biogenic regime. At the end of the growing season in the phytoplankton community was dominated by destruction processes and the concentration of nutrients in the upper mixed layer was higher than the limiting level. Coccolithophores (Emiliania huxleyi and Discosphaera cf. tubifer) dominanted over investigated area. The maximum values of abundance and biomass of coccolithophores reached 90.4 mln.cell/m3 and 30.8 mgC/m3, drawing up 82% of the total number and 93% of the total biomass of phytoplankton. Influence of transformed the waters of Atlantic origin was observed in the western part of the investigated area. The number of species in the phytoplankton community here was 1.5–2 times lower than in the eastern part of the occupied mostly by Barents Sea water. In the eastern part of the presence of large dinoflagellates Neoceratium spp. (Ceratium spp.) and Dinophysis spp., lower values of chlorophyll a concentration, a higher proportion of pheophytin in the amount of pigment chlorophyll + pheophytin, the high content of ammonia in the upper mixed layer showed that in this area the phytoplankton was at a later seasonal succession stage than the western part.

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Copyright information

© Pleiades Publishing, Inc. 2018

Authors and Affiliations

  • V. M. Sergeeva
    • 1
    Email author
  • L. S. Zhitina
    • 2
  • S. A. Mosharov
    • 1
  • A. A. Nedospasov
    • 1
  • A. A. Polukhin
    • 1
  1. 1.Shirshov Institute of OceanologyRussian Academy of SciencesMoscowRussia
  2. 2.Moscow State UniversityMoscowRussia

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