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Species diversity and distribution within the deep-sea nematode genus Acantholaimus on the continental shelf and slope in Antarctica
De Mesel, I.G.; Hee Joong Lee; Vanhove, S.; Vincx, M.; Vanreusel, A. (2006). Species diversity and distribution within the deep-sea nematode genus Acantholaimus on the continental shelf and slope in Antarctica. Polar Biol. 29(10): 860-871. dx.doi.org/10.1007/s00300-006-0124-7
In: Polar Biology. Springer-Verlag: Berlin; Heidelberg. ISSN 0722-4060, more
Peer reviewed article  

Available in  Authors 
    VLIZ: Open Repository 272718 [ OMA ]

Keywords
    Continental shelves; Continental slope; Distribution; Species diversity; Acantholaimus Allgén, 1933 [WoRMS]; PS, Antarctica [Marine Regions]; Marine

Authors  Top 
  • De Mesel, I.G., more
  • Hee Joong Lee
  • Vanhove, S., more

Abstract
    Species diversity and distribution -in relation with biogeography, bathymetry and environmental characteristics- within the genus Acantholaimus were investigated on the shelf and slope (182-2,009 m) in the Weddell Sea (Kapp Norvegia and Vestkapp) and near the Antarctic Peninsula (Drake Passage and Bransfield Strait). The occurrence of the otherwise typical deep-sea genus Acantholaimus in high densities and diversity on the continental shelf is a unique feature of the Southern Ocean. Fifty-five Acantholaimus species (morpho-types) were distinguished in our study area, of which 39 were found on the shelf. The Acantholaimus communities were characterised by a high number of congeneric species and the presence of many rare species, similar to typical deep-sea communities. Fourteen species had a distribution extending from the shelf to the lower slope. High local and regional diversity was obvious and a considerable level of endemism was suggested. A negative impact of chlorophyll a concentrations, reflecting the availability of phytoplankton, was found on the Acantholaimus densities and species diversity.

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