Abstract
Located in western France, the Pen Mur dam of Muzillac (Morbihan) is mainly used for the production of drinking water and for fishing. Over the past few years, the upstream part of this eutrophic waterbody has been invaded by Egeria densa. To define suitable methods for the management of this plant, a 1996 study focused on the morpho-metric characteristics of the reservoir, the quality of its water and sediments, the diversity of its vegetation and various aspects of colonisation by E. densa. Analyses of usage and pollution were also made, as well as a review of the techniques available to control the development of this species. Based on the results of this study, a management plan was put forward. Studies in 1997 and 1998 showed a significant decline in the level of colonisation. This was probably due to the substantial floods which uprooted submerged plants in winter, followed by massive ice formation during winter and warm temperatures in spring leading to a development of cyanobacteria which are detrimental to macrophytes. Monitoring the competition between E. densa and the cyanobacteria could lead to determination of the causes of the predominance of one or the other.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Cook, C. D. K., and K. Urmi-König, 1984. A revision of the genus Egeria (Hydrocharitaceae). Aquat. Bot. 19: 73–96.
Dutartre, A., J. Haury, A. Jigorel, and C. Laplace, 1997. Possibilités de gestion de l’invasion de la retenue de Pen Mur (Muzillac, Morbihan) par une plante aquatique exotique: Egeria densa. Cemagref, ENSA/INRA, Bordeaux Rapport pour le Conseil Général du Morbihan: 142 pp.
Dutartre, A., J. Haury, and A. M. Planty-Tabbachi, 1997. Macrophytes aquatiques et riverains introduits en France. Bull. Fr. Pêche Piscic. 344–345 (1–2): 407–426.
Feuillade, J., 1961. Une plante aquatique nouvelle pour la France Elodea densa (Planch.) Casp. Bull. Soc. Linnéenne Normandie 10 (2): 47–51.
Getsinger, K. D., and C. R. Dillon, 1984. Quiescence, growth and senescence of Egeria densa in lake Marion. Aquat. Bot. 20: 329–338.
Haramoto, T., and I. Ikusima, 1988. Life cycle of Egeria densa Planch., an aquatic plant naturalized in Japan. Aquat. Bot. 30: 389–403.
Howard-Williams, C., 1993. Processus of aquatic weed invasions: the New Zealand example. J. Aquat. Plant Mgmt 31: 17–23.
Jigorel, A., and G. Bertru, 1993. Endogenic development of sediments in a eutrophic lake. Hydrobiologia 268: 45–55.
Reddy, K. R., J. C. Tucker, and W. F. Debusk, 1987. The role of Egeria densa in removing nitrogen and phosphorus from nutrient enriched waters. J. Aquat. Plant Mgmt. 25: 14–19.
Tanner, C. C., J. S. Clayton, and R. D. S. Wells, 1993. Effects of suspended solids on the establishment on growth of Egeria densa. Aquat. Bot. 45: 299–310.
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 1999 Springer Science+Business Media Dordrecht
About this paper
Cite this paper
Dutartre, A., Haury, J., Jigorel, A. (1999). Succession of Egeria densa in a drinking water reservoir in Morbihan (France). In: Caffrey, J., Barrett, P.R.F., Ferreira, M.T., Moreira, I.S., Murphy, K.J., Wade, P.M. (eds) Biology, Ecology and Management of Aquatic Plants. Developments in Hydrobiology, vol 147. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-0922-4_34
Download citation
DOI: https://doi.org/10.1007/978-94-017-0922-4_34
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-5404-3
Online ISBN: 978-94-017-0922-4
eBook Packages: Springer Book Archive