MEPS 493:291-296 (2013)  -  doi:10.3354/meps10507

NOTE
First evidence of reproductive success in a southern invader indicates possible community shifts among Arctic zooplankton

Angelina Kraft1,*, Eva-Maria Nöthig1, Eduard Bauerfeind1, David J. Wildish2, Gerhard W. Pohle2, Ulrich V. Bathmann3, Agnieszka Beszczynska-Möller1, Michael Klages1,4

1Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany
2Atlantic Reference Centre, Huntsman Marine Science Centre, 1 Lower Campus Road, St. Andrews, New Brunswick, E5B 2L7, Canada
3Leibniz Institute for Baltic Sea Research Warnemünde, Seestraße 15, 18119 Rostock, Germany
4Present address: Sven Lovën Centre for Marine Sciences at the University of Gothenburg, Kristineberg 566, 451 78 Fiskebäckskil, Sweden

ABSTRACT: Pelagic zooplankton were monitored from 2000 to 2012 at a permanent location near the Svalbard archipelago, at the boundary between the central Arctic Ocean and the Greenland Sea in the eastern Fram Strait. The temporal results reveal the first evidence of successful reproduction in Arctic waters by an Atlantic pelagic crustacean from temperate waters. The Atlantic hyperid amphipod Themisto compressa is shown to have expanded its range from more southerly and warmer waters from 2004 onwards. Successful reproductive activity by T. compressa in Arctic waters was confirmed in 2011, indicated by the presence of a complete temporal series of developmental stages including ovigerous females and recently hatched juveniles. The Arctic amphipod community is currently in transition and a continuing northward spread of southern invaders could cause a biodiversity shift from large Arctic to smaller Atlantic species.


KEY WORDS: Hyperiid amphipod · Arctic marine ecology · Biodiversity · Biogeographic boundaries


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Cite this article as: Kraft A, Nöthig EM, Bauerfeind E, Wildish DJ and others (2013) First evidence of reproductive success in a southern invader indicates possible community shifts among Arctic zooplankton. Mar Ecol Prog Ser 493:291-296

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