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Benthic Mesocosms: II. Basic Research in Hard-Bottom Benthic Mesocosms

  • Torgeir Bakke
Part of the Coastal and Estuarine Studies book series (COASTAL, volume 37)

Abstract

The performance of hard-bottom experimental ecosystems has been evaluated on the bases of replicability in space and time, reproducibility of natural environmental factors, goodness in imitation of the original community, and suitability for studies of interaction between populations. Only two comprehensive systems have been reported in the literature, both imitating the littoral zone: an artificial Fucus vesiculosus community at Karlskrona, Sweden, and a boreal rocky shore community at Solbergstrand, Norway. Both are based on an open seawater supply. In addition, public aquaria hard-bottom communities have been used for research purposes, and the design of a coral reef system has been included as an example. Subtidal hard-bottom mesocosms have only recently been constructed, but no results have yet been produced.

These systems have been established by transplantation alone, or in combination with natural recruitment. In temperate water regimes, the latter will take several years to produce communities with dynamic stability. It is believed that community establishment time may be shortened by emphasizing careful transplantation rather than water-mediated recruitment. This would also improve the replicability among units.

The present systems have shown that hard-bottom mesocosms can be established and run successfully for several years. They have so far proved valuable in pollution research, and they should also have potential for basic research, especially in questions where one wants to manipulate the environmental regime, or population sizes and structure. Their advantage over in situ experimentation lies in the possibility of generating certain water regimes, better overall community control, and better protection of installations against damage. Their disadvantage is poor experimental replication and deviation among units with time. They should therefore not be regarded as replicates in laboratory terms, but as reasonably similar communities imitating hard-bottom conditions sufficiently to prevent the inherent organisms from reacting abnormally.

Keywords

Coral Reef Littoral Zone Rocky Shore Fore Reef Water Turnover 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Literature Cited

  1. Adey, W. H. 1983. The microcosm: a new tool for reef research. Coral Reefs 1: 193–201.CrossRefGoogle Scholar
  2. Bakke, T. 1986. Experimental long term oil pollution in a boreal rocky shore environment. Proceedings 9th AMOP Technical Seminar, Canada, 1986. ISBN 0–662–14812–6.Google Scholar
  3. Bonsdorff, E. and W. G. Nelson. 1981. Fate and effects of Ekofisk crude oil in the littoral of a Norwegian fjord. Sarsia 66: 231–240.Google Scholar
  4. Clifford, H. T. and W. Stephenson. 1975. An Introduction to Numerical Classification. New York: Academic Press. 229 pp.Google Scholar
  5. Dayton, P. K. 1975. Experimental evaluation of ecological dominance in a rocky intertidal algal community. Ecol. Monogr. 45: 137–159.CrossRefGoogle Scholar
  6. Gray, J. S. 1987. Oil pollution studies of the Solbergstrand mesocosms. Phil. Trans. R. Soc. Lond. B 316: 641–654.CrossRefGoogle Scholar
  7. Hartnoll, R. G. and S. J. Hawkins. 1980. Monitoring rocky shore communities: a critical look at spatial and temporal variation. Helgol. Wiss. Meeresunters. 33: 484–494.CrossRefGoogle Scholar
  8. de Lafontaine, Y. and W. C. Leggett. 1987. Evaluation of in situ enclosures for larval fish studies. Can. J. Fish. Aquat. Sci. 44: 54–65.CrossRefGoogle Scholar
  9. Lein, T. E. 1980. The effects of Littorina littorea L. (Gastropoda) grazing on littoral green algae in the inner Oslofjord, Norway. Sarsia 65: 87–92.Google Scholar
  10. Lystad, E. and K. Moe. 1985. Comparison of population dynamics, growth and reproductive cycle in Littorina littorea (L.) at four artificial and one natural locality at Solbergstrand, Oslofjorden, where two of the artificial localities were exposed to hydrocarbons. University of Oslo: Unpubl. thesis for the Cand. Real. Degree. 198 pp. (In Norwegian.)Google Scholar
  11. Notini, M., B. Nagell, A. Hagström, and O. Grahn. 1977. An outdoor model simulating a Baltic Sea littoral ecosystem. Oikos 28: 2–9.CrossRefGoogle Scholar
  12. Pedersen, A. 1987. Community metabolism on rocky shore assemblages in a mesocosm: A. Fluctuations in production, respiration, chlorophyll a content and C:N ratios of grazed and non-grazed assemblages. Hydrobiologia 151/152: 267–275.Google Scholar
  13. Shannon, C. E. and W. Weaver. 1963. The Mathematical Theory of Communication. Urbana: University of Illinois Press. 1 18 pp.Google Scholar

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© Springer-Verlag New York, Inc. 1990

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  • Torgeir Bakke

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