Oligochaetes, organic sedimentation, and trophic state: how to assess the biological recovery of sediments in lakes?
Oligochaete communities were used to assess the biological recovery of sediments after the abatement of eutrophication in Lake Geneva (Switzerland). In 1995, mean relative abundance of oligotrophic worm species (OS) was around 30% in areas of low organic sedimentation (LOS) whereas, in areas of high organic sedimentation (HOS), it was below 15%. The abundance of OS observed in LOS areas was close to values predicted from total phosphorus (TP) concentrations in the water. Recovery from eutrophication proceeded at the same pace in the water (TP) and in the sediment (OS) of LOS areas, whereas it was delayed in the sediment of HOS areas. Lake Geneva was mesotrophic according to the oligochaete communities of LOS areas, but it was meso-eutrophic according to those of HOS areas.
Key wordsBiomonitoring eutrophication indicator species lake oligochaetes recovery sediment zoobenthos
Unable to display preview. Download preview PDF.
- Baines, S. T. and M. Pace, 1994. Relationships between suspended particulate matter and sinking flux along a trophic gradient and implication for the fate of planktonic primary production. Can. J. Fish. Aquat. Sci. 51:25–36.Google Scholar
- Blanc, P., C. Corvi and F. Rapin, 1995. Evolution physico-chimique des eaux du Léman, campagne 1994. Rapp. Comm. int. prot. eaux Léman contre pollut. 37–67.Google Scholar
- Fricker, Hj., 1980. OECD Eutrophication programme regional project, alpine lakes. Swiss Federal Board for Environmental Protection, Bern.Google Scholar
- Hakanson, L. and M. Jansson, 1983. Principles of lake sedimentology. Springer Verlag, Berlin Heidelberg, 316 p.Google Scholar
- Juget, J., 1967. La faune benthique du Léman: modalité et déterminisme du peuplement. Thèse univ. Lyon, 366 p.Google Scholar
- Lang, C., 1991. Decreasing phosphorus concentrations and unchanged oligochaete communities in Lake Geneva: how to monitor recovery? Arch. Hydrobiol. 122:305–312.Google Scholar
- Lang, C. and O. Reymond, 1996. Empirical relationships between oligochaetes, phosphorus and organic deposition during the recovery of Lake Geneva from eutrophication. Arch. Hydrobiol. 136:237–245.Google Scholar
- Minns, C.K., D.A. Hurley and K.H. Nichols, 1986. Project Quinte: point-source phosphorus control and ecosystem response in the Bay of Quinte, Lake Ontario. Can. Spec. Publ. Fish. Aquat. Sci. 86:270 p.Google Scholar
- Monard, A., 1919. La faune profonde du lac de Neuchâtel. Thèse Univ. Neuchâtel. 176 p.Google Scholar
- Piguet, E. and K. Bretscher, 1913. Oligochètes; Catalogue des Invertébrés de la Suisse. Georg & Cie, Genève, 215 p.Google Scholar
- Reymond, O., 1994. Préparations microscopiques permanentes d’oligochètes: une méthode simple. Bull. Soc. Vaud. Sc. Nat. 83:1–3.Google Scholar
- Robbins, J.A., T. Keilty, D.S. White and D.N. Eddington, 1989. Relationships among tubificid abundances, sediment composition and accumulation rates in Lake Erie. Can. J. Fish. Aquat. Sci. 46:223–231.Google Scholar