Advertisement

The benthic infauna and benthic respiration off the Banc d’Arguin (Mauritania, Northwest Africa)

  • G. C. A. Duineveld
  • P. A. W. J. de Wilde
  • E. M. Berghuis
  • A. Kok
Conference paper
  • 50 Downloads
Part of the Developments in Hydrobiology 86 book series (DIHY, volume 86)

Abstract

In May 1988, a study was made of the benthic community structure and benthic respiratory activity along two transects across the Mauritanian shelf off Banc d’Arguin. The main emphasis of the present paper is put on the macrobenthos, but results of a gross analysis of the meibenthos are discussed as well. Macrofaunal and meiofaunal density showed no consistent decrease with distance from the shore. The composition of the macrofauna taxa appeared to be closely correlated with sediment parameters and less so with depth. The highest macrofaunal biomass was found at the northern edge of the Banc d’Arguin, and the lowest biomass along the outer shelf. The biomass levels on the shelf match the ones reported for the northern Cap Blanc area where, in contrast to the seasonal upwelling in the investigated area, upwelling takes place all year round.

Benthic respiration rates on the offshore shelf were relatively high at the nearshore stations and low near the shelf break. Experimental evidence suggests that the low O2 levels in the upwelling water covering part of shelf, inhibited benthic respiration. The high respiratory activity at some northern inshore stations coincided with the presence of oxygen-rich coastal water. In this area benthic respiration surpassed the level previously reported for the enriched Cap Blanc area. On the basis of our respiration data, an estimate is made of the total carbon demand of the benthic community on the shelf in May and this quantity is compared with the measurements of daily primary production.

Key words

macrofauna meiofauna benthic respiration Mauritanian shelf 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Ansa-Emmim, M., 1982. Fisheries in the CINECA region. Rapp. P.-v. Réum. Cons. int. Explor. Mer 180: 405–422.Google Scholar
  2. Banse, K., 1982. Mass-scaled rates of respiration and intrinsic growth in very small invertebrates. Mar. Ecol. Prog. Ser. 9: 281–297.CrossRefGoogle Scholar
  3. Banse, K., F. H. Nichols & D. R. May, 1971. Oxygen consumption at the sea bed. III — On the role of the macrofauna at three stations. Vie et Milieu 22: 31–52.Google Scholar
  4. Bak, R. P. M. & G. Nieuwland, 1993. Patterns in pelagic and benthic nanoflagellate densities in the coastal upwelling system along the Banc d’Arguin, Mauritania. Hydrobiologia 258: 119–131.CrossRefGoogle Scholar
  5. Berghuis, E. M., G. C. A. Duineveld & J. Hegeman, 1993. Primary production and distribution of phytopigments in the water column and sediments on the upwelling shelf off the Mauritanian coast (northwest Africa). Hydrobiologia 258: 81–93.CrossRefGoogle Scholar
  6. Brey, T., 1990. Estimating productivity of macrobenthic invertebrates from biomass and mean individual weight. Meeresforschung 32: 329–343.Google Scholar
  7. Christensen, J. P. & T. T. Packard, 1977. Sediment metabolism from the northwest African upwelling system. Deep Sea Res. 24: 331–343.CrossRefGoogle Scholar
  8. Cramer, A., 1989. A common artefact in estimates of benthic respiration by the use of stainless steel. Neth J. Sea Res 23: 1–6CrossRefGoogle Scholar
  9. Cramer, J., 1991. Benthic metabolic activity at frontal systems in the North Sea. Thesis Univ. Amsterdam: 93 p.Google Scholar
  10. Cramer, J., 1991. Benthic metabolic activity at frontal systems in the North Sea. Thesis Univ. Amsterdam: 93 p.Google Scholar
  11. De Wilde, P. A. W. J., E. M. Berghuis & A. Kok, 1984. Structure and energy demand of the benthic community of the Oyster Ground, central North Sea. Neth. J. Sea Res. 18: 143–159.CrossRefGoogle Scholar
  12. Domain, F., 1982. Répartition de la biomasse globale du benthos sur le plateau continental ouest-africain de 17° à 12° N: densités comparées liées au différents types du fond. Rapp. P.-v. Réun. Cons. int. Explor. Mer 180: 335–336.Google Scholar
  13. Gerlach, S. A., 1971. On the importance of marine meiofauna for benthos communities. Oecologia (Berlin) 6: 176–190.CrossRefGoogle Scholar
  14. Heip, C., R. Herman & M. Vincx, 1983. Subtidal meiofauna of the North Sea: a review. Biol. Jb Dodonaea 51: 116–170.Google Scholar
  15. Hill, M. O., 1979. TWINSPAN — a Fortran program for arranging multivariate data in an ordered two-way table by classification of the individuals and their attributes. Ithaca, Cornell University, New York, 90 pp.Google Scholar
  16. Huntsman, S. A., & R. T. Barber, 1977. Primary production off Northwest Africa: the relationship to wind and nutrient conditions. Deep Sea Res. 24: 25–33.CrossRefGoogle Scholar
  17. Minas, H. J., L. A. Codispoti & R. C. Dugdale, 1982. Nutrients and primary production in the upwelling region off Northwest Africa. Rapp. P.-v. Réun. Cons. int. Explor. Mer 180: 148–183.Google Scholar
  18. Mittelstaedt, E., 1974. Some aspects of the circulation in the north-west African upwelling area off Cap Blanc. Téthys 6: 89–92.Google Scholar
  19. Mittelstaedt, E., 1976. On the currents along the Northwest African Coast south of 22° North. Dt. hydrogr. Z. 29: 97–117.CrossRefGoogle Scholar
  20. Nichols, J. & G. T. Rowe, 1977. Infaunal macrobenthos off Cap Blanc, Spanish Sahara. J. mar. Res. 35: 525–536.Google Scholar
  21. Peters, H., 1976. The spreading of the water masses of the Banc d’Arguin in the upwelling area off the northern Mauritanian coast. ‘Meteor’ Forsch.-Ergebn. A 18: 78–100.Google Scholar
  22. Peters, R. H., 1983. The ecological implications of body size. Cambridge University Press, Cambridge, 330 pp.CrossRefGoogle Scholar
  23. Pfannkuche, O., R. Theeg & H. Thiel, 1983. Benthos activity, abundance and biomass under an area of low upwelling off Morocco, Northwest Africa. ‘Meteor’ Forsch.-Ergebnisse D 36: 85–96.Google Scholar
  24. Rumohr, H., T. Brey & S. Ankar, 1987. A compilation of biometrie conversion factors for benthic invertebrates of the Baltic Sea. The Baltic Marine Biologists Publication 9: 1–56.Google Scholar
  25. Schwinghamer, P., B. Hargrave, D. Peer & C. M. Hawkins, 1986. Partitioning of production and respiration among size groups of organisms in an intertidal benthic community. Mar. Ecol. Prog. Ser. 31: 131–142.CrossRefGoogle Scholar
  26. Smith, K. L., Jr., C. H. Clifford, A. H. Eliason, G. Waiden, G. T. Rowe & J. M. Teal., 1976. A free vehicle for measuring benthic community metabolism. Limnol. Oceanogr. 21: 164–170.CrossRefGoogle Scholar
  27. Thiel, H., 1982. Zoobenthos of the CINECA area and other upwelling regions. Rapp. P.-v. Réun. Cons. int. Explor. Mer 180: 323–334.Google Scholar
  28. Van Duyl, F., R. P. M. Bak, A. J. Kop, G. Nieuwland, E. M. Berghuis & A. Kok, 1991. Mesocosm experiments: mimicking seasonal developments of microbial variables in North Sea sediments. In F. C. van Duyl (ed.), The applicability of mesocosms in North Sea eutrophication studies. NIOZ — Rapport 1991-5: 50–71.Google Scholar
  29. Wolff, W. J. & C. J. Smit, 1990. The Banc d’Arguin, Mauritania, as an environment for coastal birds. Ardea 78: 17–38.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1993

Authors and Affiliations

  • G. C. A. Duineveld
    • 1
  • P. A. W. J. de Wilde
    • 1
  • E. M. Berghuis
    • 1
  • A. Kok
    • 1
  1. 1.Netherlands Institute for Sea ResearchTexelThe Netherlands

Personalised recommendations