Marine Biology

, Volume 64, Issue 3, pp 259–265 | Cite as

Intertidal hyperbenthic populations in the Nanaimo estuary

  • J. R. Sibert


Samples were pumped from within 5 and 30 cm of the sediment surface in a tidal channel of the Nanaimo estuary and filtered through 100-μm mesh plankton nets. Despite homogeneity of the water at these levels, as indicated by salinity and oxygen, there were large persistent differences in population density of small crustaceans. The density at the 5 cm level always exceeds the density at the 30 cm level by a factor of 2 to 20. These results are discussed in relation to Beyer's concept of hyperbenthic plankton populations which is extended to include intertidal areas. It is concluded that hyperbenthic populations are real phenomena and are of considerable importance in trophodynamics. A model for formation and maintenance of hyperbenthic populations is proposed.


Oxygen Population Density Sediment Surface Considerable Importance Tidal Channel 


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Copyright information

© Springer-Verlag 1981

Authors and Affiliations

  • J. R. Sibert
    • 1
  1. 1.Department of Fisheries and OceansResource Services Branch, Pacific Biological StationNanaimoCanada

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