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Distribution patterns and biodiversity in polychaete communities of the Weddell Sea and Antarctic Peninsula area (Southern Ocean)

Published online by Cambridge University Press:  15 June 2006

B. Hilbig
Affiliation:
DZMB-CeDAMar c/o Lehrstuhl für Spezielle Zoologie, Ruhr-Universität Bochum, Universitätsstrasse 150, D-44780 Bochum, Germany
D. Gerdes
Affiliation:
Alfred-Wegener-Institut für Polar- und Meeresforschung, Columbuscenter, D-27568 Bremerhaven, Germany. E-mail: dgerdes@awi-bremerhaven.de, americo.montiel@umag.cl
A. Montiel
Affiliation:
Alfred-Wegener-Institut für Polar- und Meeresforschung, Columbuscenter, D-27568 Bremerhaven, Germany. E-mail: dgerdes@awi-bremerhaven.de, americo.montiel@umag.cl

Abstract

During the expedition EASIZ II with RV ‘POLARSTERN’ in 1998 a multibox corer yielded 151 quantitative samples from 26 stations between 120 and 2415 m water depth for benthic community analysis. From this material a total of 235 polychaete species out of 37 families was determined. Forty-seven species are new to science. The polychaete fraction contributed 41.9% to total benthic abundance and 6.5% to total benthic biomass at these stations. Overall mean polychaete abundance (ind m−2) and biomass (g wet weight m−2) at the stations were 1617 and 49, respectively.

Multidimensional scaling procedure clearly grouped the stations into south-eastern Weddell Sea shelf stations, deep-water stations, and stations mostly around the Antarctic Peninsula. Differences between these groups existed in terms of polychaete abundance and biomass as well as species composition, diversity, and evenness.

Type
Research Article
Copyright
2006 Marine Biological Association of the United Kingdom

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