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Environmental effects on zooplankton abundance on a sub-Arctic shelf off northern Norway

K. Eiane,Marina Espinasse,B. Espinasse

Published 2018 in Aquatic Biology

ABSTRACT

We studied the abundance of common zooplankton on 8 dates and at 5 locations on the shelf off the Lofoten Islands, northern Norway, between September 2013 and August 2014. We tested for relationships between environmental variability and abundances. We found that, of 17 zooplankton taxa or groups for which we recorded abundances, 4 omnivorous or carnivorous groups persistently differed in abundance between stations. This difference probably reflected relatively deep centres of distribution in the water column, and abundances of these species were positively associated with bottom depth. In 10 taxa or groups, abundance correlated with sampling date or temperature, salinity, or fluorescence, but generally not with bottom depth. Most of these taxa were consumers on low trophic levels, with a vertical distribution often associated with near-surface waters. In the remaining taxa or groups, no association between abundance and the environment or with time of sampling was established. Our results suggest that on-shelf abundances of zooplankton with intermediate-to-deep vertical distribution patterns are mainly limited by bathymetry, while abundance variations in zooplankton with a predominately near-surface distribution are driven by intra-annual environmental variability.

PUBLICATION RECORD

  • Publication year

    2018

  • Venue

    Aquatic Biology

  • Publication date

    2018-08-06

  • Fields of study

    Biology, Environmental Science

  • Identifiers
    DOI 10.3354/ab00697
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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