Polar Biology

, Volume 30, Issue 8, pp 1035–1046

Soft bottom species richness and diversity as a function of depth and iceberg scour in Arctic glacial Kongsfjorden (Svalbard)

Original Paper

DOI: 10.1007/s00300-007-0263-5

Cite this article as:
Laudien, J., Herrmann, M. & Arntz, W.E. Polar Biol (2007) 30: 1035. doi:10.1007/s00300-007-0263-5

Abstract

Macrozoobenthic soft-sediment communities of central Arctic Kongsfjorden inhabiting six depth zones between 5 and 30 m were sampled using SCUBA-diving during June–August 2003 and analysed comparatively. About 63 taxa were found, nine of which had not been reported for Kongsfjorden and four for Svalbard. Suspension feeding or surface and sub-surface detritivorous polychaetes and deposit-feeding amphipods were dominant. Only 11 of the 63 taxa (45 species and additional 18 families not further identified) inhabited the complete depth range. Biomass ranged from 3.5 to 25.0 g ash free dry mass m−2 and mean Shannon diversity (Log e) was 2.06. Similarity clustering from abundance and biomass data showed a significant difference between the shallow station (5 m) and the rest. The latter formed two sub-groups (10–20 and 25–30 m). Depth is irrevocably correlated with ice-scouring. Thus the differences in diversity together with the predicted iceberg scour intensity support the ‘intermediate disturbance hypothesis’ indicating that habitats impacted by moderate iceberg scouring enable higher diversity. In contrast, biotopes frequently affected only host pioneer communities, while mature, less diverse assemblages dominate depths of low impact.

Keywords

Biodiversity Feeding modes Ice-scouring Intermediate disturbance hypothesis Macrozoobenthos Soft-sediment 

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Jürgen Laudien
    • 1
  • Marko Herrmann
    • 1
  • Wolf E. Arntz
    • 1
  1. 1.Alfred Wegener Institute for Polar and Marine ResearchBremerhavenGermany

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