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Nematode assemblages from subtidal sandbanks in the Southern Bight of the North Sea: effect of small sedimentological differences
Vanaverbeke, J.; Gheskiere, T.; Steyaert, M.; Vincx, M. (2002). Nematode assemblages from subtidal sandbanks in the Southern Bight of the North Sea: effect of small sedimentological differences. J. Sea Res. 48(3): 197-207. dx.doi.org/10.1016/s1385-1101(02)00165-x
In: Journal of Sea Research. Elsevier/Netherlands Institute for Sea Research: Amsterdam; Den Burg. ISSN 1385-1101; e-ISSN 1873-1414
Peer reviewed article  

Available in  Authors | Datasets 
    VLIZ: Open Repository 273964 [ OMA ]

Keywords
    Sedimentary structures > Bed forms > Banks (topography) > Sand banks
    Sedimentation
    ANE, North Sea [Marine Regions]
    Marine
Author keywords
    nematode assemblages; sand bank; Multiple Discriminant Analysis (MDA); sediment granulometry; North Sea

Authors  Top | Datasets 

Abstract
    Nematode assemblages from four subtidal sandbanks belonging to different sandbank systems on the Belgian Continental Shelf were investigated both in spring and fall. The assemblages were characterised by different species composition patterns on the different sandbanks. This is in contrast to results of earlier studies which showed that neither meiobenthic nor macrobenthic taxa differed among these sandbanks. Although the sediments on these sandbanks could all be classified as medium sands, the use of Multiple Discriminant Analysis (MDA) suggested that median grain size and the proportions of median sand and very fine sand were the variables explaining the difference in nematode community composition. These findings emphasise the strong relationship between the relative abundance of nematode species and sediment composition. The influence of sand extraction on these sandbanks resulted in coarsening of the sediment, which had a direct effect on the nematode species composition. Diversity was not affected, indicating that nematodes inhabiting highly dynamic environments are well adapted to physical disturbance. The diversity at sandbanks is not necessarily very different from the surrounding areas, since in more offshore parts of the Belgian Continental Shelf, clean and rather coarse sands prevail and the differences in sediment composition are not sufficient to induce large differences in diversity.

Datasets (2)
  • Meiobenthos of subtidal sandbanks on the Belgian Continental Shelf, more
  • SPEEK database: Meiobenthos of subtidal sandbanks on the Belgian Continental Shelf, more

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