Hydrobiologia

, Volume 312, Issue 3, pp 147–152

On the reliability of Ponar grab samples for the quantitative study of benthic invertebrates in ponds

  • L. Int Panis
  • B. Goddeeris
  • R. F. Verheyen
Article

Abstract

We present observations on the variability of sediment penetration depth by the Ponar grab sampler, which lead us to question the reliability of grab samples in the quantitative study of freshwater benthos. Penetration depth of the Petite Ponar grab depends on substrate type, and correlates with the amount of organic carbon, the water content and the granulometry of the sediment. Since these factors can also influence faunal composition and vertical distribution in the sediment, it is important to study the performance of the sampler before a biological explanation for the observed pattern is given. At the site studied, a case study was performed, in which variable grab penetration did not influence biological interpretation because the penetration depth of the grab followed that of the organisms under study.

Key words

benthos community ponar grab sampling sediment penetration spatial distribution 

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References

  1. Cummins, K., 1962. An evaluation of some techniques for the collection and analysis of benthic samples with special emphasis on lotic waters. Am. Midland Nat. 67: 477–504.Google Scholar
  2. Elliott, J. & C. Drake, 1981. A comparative study of seven grabs used for sampling benthic macroinvertebrates in rivers. Freshwat. Biol. 11: 99–120.Google Scholar
  3. Int Panis, L., 1990. Invloed van verontreiniging op de invertebraten gemeenschappen in vijverecosystemen : Evaluatie van de Abundance Biomass Comparison methode van Warwick. Licentiaats-thesis, departement biologie, U.I.A., 77 pp.Google Scholar
  4. Lie, U. & M. Pamatmat, 1965. Digging characteristics and sampling efficiency of the 0.1 m2 van Veen grab. Limnol. and Oceanogr. 10: 379–384.Google Scholar
  5. Ludwig, J. & J. Reynolds, 1988. Statistical ecology, a primer on methods and computing. John Wiley & Sons, Inc., 337 pp..Google Scholar
  6. Nalepa, T.F., M.A. Quigley & R.W. Ziegler, 1988. Sampling efficiency of the Ponar grab in two different benthic environments. J. Great Lakes Res. 14: 89–93Google Scholar
  7. Walkley, A. & I.A. Black, 1934. An examination of the Degtjareff method for determining soil organic matter, and a proposed modification of the chromic acid titration method. Soil Science 37: 29–38.Google Scholar

Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • L. Int Panis
    • 1
  • B. Goddeeris
    • 2
  • R. F. Verheyen
    • 1
  1. 1.Departement BiologieUniversitaire Instelling AntwerpenWilrijk, AntwerpBelgium
  2. 2.Afd. ZoetwaterbiologieKoninklijk Belgisch Instituut voor NatuurwetenschappenBrusselsBelgium

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