Using benthos as a tool for coastal management: The impact of the tidal power station on benthic communities of the Rance basin
Keywords:
tidal power station, long-term changes, habitat heterogeneityAbstract
The spatio-temporal variability of benthic communities was studied in a modified system whose main physical characteristics are controlled by humans: the Rance basin, with its tidal power station. Soft-bottom communities were sampled in 1976 and 1995 by a quantitative survey of 105 and 113 stations, respectively, to assess spatial and temporal changes, to determine factors involved in benthic assemblage changes and to lay a base for the management of this coastal area. A total of 205 and 240 species were recorded in 1976 and 1995, respectively. Ascendant hierarchical classification and factorial correspondence analysis identified 7 and 6 assemblages in 1976 and 1995, respectively. The main groups are: 1) the Amphioxus lanceolatus-Glycymeris glycymeris; 2) the Abra alba-Corbula gibba and 3) the oligospecific Macoma balthica communities. A large consortium of common species linked the main assemblages described in 1976 as in 1995. From comparison of their distribution and structure, local spatio-temporal changes were identified in response to modifications of the habitats due to 1) silting in the brackish sector; 2) the decrease in the mean low water level and 3) the proliferation of the mollusc Crepidula fornicata. As a consequence, species richness 1) decreased in the brackish part as a result of the ‘homogenisation’ of habitats induced by silting and 2) increased in parts of the basin through the proliferation of Crepidula fornicata and the apparent diversification of the associated habitat. However, despite reduction in species abundances, the structure of the identified assemblages between 1976 and 1995 remained stable at the scale of the Rance basin. This long-term relative stability seems to reflect stable environmental conditions. In the basin, tide is moderate with reduced range variations and benthic communities are preserved from the effects of swells. However, the new balance is entirely dependant upon the mode of the installation: by modifying water levels with appropriate time intervals, managers can chose to favour intertidal or subtidal communities according to their respective ecological interests for avifauna and flatfishes, local socio-economical preoccupations or recreational activities carried out in the basin.
References
Barry, J. P. and Dayton, P. K. 1991. “Physical heterogeneity and the organization of marine communities”. In Ecological Heterogeneity, Edited by: Kolasa, J. and Pickett, S. T. A. pp. 270–320. New York: Springer-Verlag.
Benzecri, J. P. 1973. “L'analyse des données”. In Tome 2: L'analyse des correspondances, Paris: Dunod.
Beukema, J. J. 1979. Biomass and species richness of the macrobenthic animals living on the tidal flat area in the Dutch Wadden Sea: Effects of severe winter. Neth. J. Sea Res., 13(2): 203–223.
Beukema, J. J. 1982. Annual variation in reproductive success and biomass of the major macrozoobenthic species living in a tidal flat area of the Wadden Sea. Neth. J. Sea Res., 16: 37–45.
Beukema, J. J. 1989. Long-term changes in macrozoobenthic abundance on the tidal flats of the western part of the Dutch Wadden Sea. Helgoländer. Wiss. Meeressunters., 43: 405–415.
Bonnot-Courtois, C. 1997. Evolution de la rép artition des sédiments dans l'estuaire de la Rance, 1883–1994. Atlas permanent de la mer et du littoral 3, 29.
Bonnot-Courtois, C. and Lafond, L. R. 1991. Caractérisation et comportement des vases dans l'estuaire de la Rance, Rennes: Electricité de France.
Clavier, J. 1981. Ecologie descriptive et fonctionnelle du peuplement des sables fins vaseux dans le bassin maritime de la Rance, Paris VI: Univ.. Ph.D. Thesis
Clavier, J., Lechapt, J. P., Retière, C. and Rivain, V. 1983. “Effets à long terme du fonctionnement de l'usine marémotrice sur l'évolution du peuplement des sables fins vaseux de la Rance”. In Proceedings of the 17th EMBS, 1983 Sept 27–Oct 2, Edited by: Gauthiers-Villars, M. pp. 75–79. Paris: Acta. Oceanol
Clifford, H. T. and Stephenson, W. 1975. An Introduction to Numerical Classification, New-York: Academic Press.
Connell, J. H. 1979. Intermediate disturbance hypothesis. Science, 204: 1344–1345.
Daborn, G. R. and Dadswell, M. J. 1988. “Natural and anthropogenic changes in the bay of Fundy–Gulf of Maine–Georges bank system”. In Natural and Man-made Hazards, Edited by: El-Sabh, M. I. and Murty, T. S. pp. 547–560. D. Ridel Publishing Company.
Dauvin, J. C. 1993. Le benthos: Témoin des variations de l'environnement. Oceanis, 19(6): 25–53.
De Montaudoin, X., Audemard, C. and Labourg, P. J. 1999. Does the slipper limpet (Crepidula fornicata, L.) impair oyster growth and zoobenthos biodiversity? A revisited hypothesis. J. Exp. Mar. Biol. Ecol., 235: 105–124.
De Montaudoin, X. and Sauriau, P. G. 1999. The proliferating Gastropoda Crepidula fornicata may stimulate macrozoobenthoc diversity. J. Mar. Biol. Assoc. U.K., 79: 1069–1077.
Desroy, N. 1998. Les peuplements benthiques du basin maritime de la Rance. Evolution de la biodiversité et effets de l'activité prédatrice de Nephtys hombergii (Annélide Polychète) sur le recrutement, Univ. Rennes I. Ph.D. Thesis
Dewarumez, J. M., Davoult, D., Sanvicente-Anorve, L. E. and Frontier, S. 1992. Is the ⟨⟨muddy heterogenous sediment assemblage⟩⟩ an ecoton between the pebbles community and the Abra alba community in the southern bight of the North Sea? Neth. J. Sea Res., 30: 229–238.
Fisher, E. 1929. Recherches de bionomie et d'océanographie littorales sur la Rance et la littoral de la Manche. Annls. Inst. Oceano. Monaco, 5(3): 205–429.
Frontier, S. 1976. Utilisation des diagrammes rang-fréquence dans l'analyse des écosystèmes. J. Rech. Oceanogr., 1(3): 35–48.
Frontier, S. 1985. Diversity and structure in aquatic ecosystems. Oceano. Mar. Biol. Ann. Rev., 23: 253–312.
Frontier, S. and Pichod-Viale, D. 1991. Ecosystèmes: Structure, fonctionnement, évolution, Paris: Masson.
Gordon, D. C. and Longhurst, A. R. 1979. The environmental aspect of a tidal project in the upper reaches of the bay of Fundy. Mar. Poll. Bull, 10: 47–51.
Lechapt, J. P. 1983. Contribution à l'étude des annélides polychètes de substrats meubles en Rance maritime, Univ. Rennes I.. Ph.D. Thesis
Legendre, L. and Legendre, P. 1979. “Ecologie numérique”. In Tome 2: La structure des données écologiques, Paris: Masson.
Le Mao, P. 1986. Feeding relationships between the benthic fauna and the dominant benthic fish of the Rance estuary (France). J. Mar Biol. Assoc. U.K., 66: 391–401.
Levin, S. A. 1981. “Mechanisms for the generation and the maintenance of diversity”. In The Mathematical Theory of the Dynamics of Biological Populations, Edited by: Hiorns, R. W. and Cooke, D. pp. 173–194. London: Academic Press.
Levin, S. A. 1994. Patchiness in marine and terrestrial systems: From individuals to populations. Phil. Trans. R. Soc., 343: 99–103.
Marfenin, N. N., Malutin, O. I., Pantulin, A. N. and Pertzova, N. M. 1997. A tidal power environmental impact assessment: Case study of the Kislogubskaija experimental tidal power station (Russia). La houille blanche, 3: 101–105.
Marquet, P. A., Fortin, M. J. and Pineda, J. 1993. “Ecological and evolutionary consequences of patchiness: A marine-terrestrial perspective”. In Patch Dynamics, Edited by: Levin, S. A., Powell, T. M. and Steele, J. H. pp. 277–300. Berlin: Springer-Verlag.
Martin, W. R. 1970. Predicted effects of proposed tidal power structures on groundfish catches in Charlotte county, N.B. J. Fish. Res. Board Can., 17(2): 169–173.
Pearson, T. H., Josefson, A. B. and Rosenberg, R. 1985. Petersen's benthic stations revisited, I. Is the kattegatt becoming eutrophic?. J. Exp. Mar. Biol. Ecol., 92: 157–206.
Petersen, C. G. 1913. Valuation of the sea. The animal communities of the sea-bottom and their importance for marine zoogeography. Rep. Dan. Biol. Stat., 21: 1–42.
Petersen, C. G. 1918. The sea-bottom and its production of fish food. Rep. Dan. Biol. Stat., 25: 1–62.
Powers, S. P., Bishop, M. A., Grabowski, J. H. and Peterson, C. H. 2002. Intertidal benthic resources of the Copper River Delta, Alaska, USA. J. Sea Res., 47: 13–23.
Reise, K. and Schubert, A. 1987. Macrobenthic turnover in the subtidal Wadden Sea: The Norderaue revisited after 60 years. Helgoländer. Wiss. Meeressunters., 41: 69–82.
Retière, C. 1979. Contribution à la connaissance des peuplements benthiques du golfe Normano-Breton, Univ. Rennes I.. State Thesis
Retière, C. 1989. Energie marémotrice et environnement aquatique. La houille blanche, 2: 133–147.
Retière, C. 1994. Tidal power and the aquatic environment of La Rance. Biol. J. Linnean Soc., 51: 25–36.
Semenov, V. N. 1997. Ecosystems alterations influenced by the tidal power station on the coast of the Barents sea. La houille blanche, 3: 86–97.
Shaw, T. L. 1980. An Environmental Appraisal of Tidal Power Stations with Particular Reference to the Severn Barrage. , Boston-London-Melbourne: Pitman Advanced Publishing Program.
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