Abstract
AB Aquatic Biology Contact the journal Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections AB 27:75-86 (2018) - DOI: https://doi.org/10.3354/ab00697 Environmental effects on zooplankton abundance on a sub-Arctic shelf off northern Norway K. Eiane1,*, M. Espinasse1, B. Espinasse2 1Nord University, PO Box 1490, 8049 Bodø, Norway 2Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, V6T1Z4, Canada *Corresponding author: ketil.eiane@nord.no 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. KEY WORDS: Plankton ecology · Sub-polar · Hydrography · Seasonality Full text in pdf format PreviousNextCite this article as: Eiane K, Espinasse M, Espinasse B (2018) Environmental effects on zooplankton abundance on a sub-Arctic shelf off northern Norway. Aquat Biol 27:75-86. https://doi.org/10.3354/ab00697 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AB Vol. 27. Online publication date: August 06, 2018 Print ISSN: 1864-7782; Online ISSN: 1864-7790 Copyright © 2018 Inter-Research.
Highlights
Seasonal variability and location differences in the abundance of high-latitude coastal marine zooplankton can span several orders of magnitude (e.g. Østvedt 1955, Eiane et al 2002, Daase et al 2007)
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
On mesoscale (
Summary
Seasonal variability and location differences in the abundance of high-latitude coastal marine zooplankton can span several orders of magnitude (e.g. Østvedt 1955, Eiane et al 2002, Daase et al 2007). Østvedt 1955, Eiane et al 2002, Daase et al 2007) Such fluctuations likely reflect effects of variability in the environment on the gain and loss processes acting in populations (Hirche et al 2001, Hays et al 2005, Willis et al 2008, Skreslet et al 2015). The mechanisms linking environmental variability with variability in zooplankton populations are only partly understood (Arashkevich et al 2002, Astthorsson & Gislason 2003, Walkusz et al 2009). This is unfortunate as marine zooplankton provides important trophic linking between the microalgae community and higher trophic level animals, thereby propagating new biological production
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