Distribution and trophic links of gelatinous zooplankton on Dogger Bank,North Sea |
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| Authors: | Jessica R Frost Anneke Denda Clive J Fox Charles A Jacoby Rolf Koppelmann Morten Holtegaard Nielsen Marsh J Youngbluth |
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| Institution: | (1) Institute for Hydrobiology and Fisheries Science, University of Hamburg, Grosse Elbstrasse 133, 22767 Hamburg, Germany;(2) Scottish Association for Marine Science, Oban, Argyll, PA37 1QA, UK;(3) Soil and Water Science Department, University of Florida, 7922 NW 71st Street, Gainesville, FL 32653, USA;(4) Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 U.S. Highway 1 North, Fort Pierce, FL 34946, USA;(5) Present address: Technical University of Denmark, 2800 Kgs. Lyngby, Denmark |
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| Abstract: | The ecology of small, gelatinous zooplankton is not integrated into management of Dogger Bank (54° 00′ N, 3° 25′ E to 55°
35′ N, 2° 20′ E). In pursuit of this goal, gelatinous zooplankton and their potential prey were sampled along a transect across
the bank on June 10–16, 2007. Eleven species of small medusae and ctenophores were collected, with six abundant taxa occurring
in greater numbers below the thermocline and in the shallower, southeastern portion of the bank. There were no statistically
significant diel changes in distribution. In contrast, potential prey were distributed more evenly across the bank and throughout
the water column. Isotopic analyses revealed that gelatinous zooplankton fed on both smaller (100–300 μm) and larger (>300 μm)
mesozooplankton, but also potentially on each other. These ecological insights suggest that small medusae and ctenophores
should be integrated into sustainable management of Dogger Bank. |
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