Hostname: page-component-77c89778f8-cnmwb Total loading time: 0 Render date: 2024-07-18T09:29:55.087Z Has data issue: false hasContentIssue false
  • English
  • Français

Conservation Problems and Management Options in Estuaries: The Bot River Estuary, South Africa, as a Case-history for Management of Closed Estuaries

Published online by Cambridge University Press:  24 August 2009

Roderick Bally
Roderick Bally
Affiliation:
Senior Scientific Officer, Zoology Department, University of Cape Town, Rondebosch 7700, South Africa.
Get access Rights & Permissions [Opens in a new window]

Extract

Closed (or ‘blind’) estuaries are common features, practically throughout the world, of areas experiencing markedly seasonal rainfall. The Bot River vlei is a closed estuary which faces considerable problems of management and conservation. For the past 100 years or more, the estuary has been opened to the sea every 2 to 5 years by artificial means. This has resulted in a very great variability of physical conditions and a concomitantly low diversity of organisms that are able to occupy the estuary permanently. Nevertheless, those species that do exist in the Bot River vlei are mostly estuarine species.

Type
Main Papers
Information
Environmental Conservation , Volume 14 , Issue 1 , Spring 1987 , pp. 45 - 51
Copyright
Copyright © Foundation for Environmental Conservation 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bally, R. & McQuaid, C.D. (1985). The physical and chemical characteristics of the waters of the Bot River estuary, South Africa. Trans. Roy. Soc. S. Afr., 45, pp. 317–32, illustr.Google Scholar
Bally, R., McQuaid, C.D. & Pierce, S.M. (1985). Primary productivity of the Bot River estuary, South Africa. Trans. Roy. Soc. S. Afr., 45, pp. 333–46, illustr.CrossRefGoogle Scholar
Bennett, B.A. (1983). Clinus spatulatus, a new species of clinid fish (Perciformes: Blennoidei) from South Africa, with a modified definition of the genus Clinus. J.L.B. Smith Inst. Ichthyol. Spec. Publ., 29, pp. 1–9, illustr.Google Scholar
Bennett, B.A. (1985). A mass mortality of fish associated with low salinity conditions in the Bot River estuary. Trans. Rov. Soc. S. Afr., 45, pp. 437–48, illustr.Google Scholar
Bennett, B.A., Hamman, K.C.D., Branch, G.M. & Thorne, S.C. (1985). Changes in the fish fauna of the Bot River estuary in relation to mouth opening and closure. Trans. Roy. Soc. S. Afr., 45, pp. 449–64, illustr.Google Scholar
Branch, G.M., Bally, R., Bennett, B.A., Decker, H.P. de, Fromme, G.A.W., Heyl, C.W. & Willis, J.P. (1985). Synopsis of the impact of artificially opening the mouth of the Bot River estuary: implications for management. Trans. Roy. Soc. S. Afr., 45, pp. 465–83, illustr.Google Scholar
Coetzee, D.J. (1985). Zooplankton and some environmental conditions in Botriviervlei, a south-western Cape estuary. Trans. Roy. Soc. S. Afr., 45, pp. 363–77, illustr.CrossRefGoogle Scholar
Day, J.H. (1981). Summaries of current knowledge of 43 estuaries in southern Africa. Pp. 251–329 in Estuarine Ecology, with Particular Reference to Southern Africa (Ed. Day, J.H.). A.A. Balkema, Cape Town, South Africa: viii + 411 pp., illustr.Google Scholar
Decker, H.P. de & Bally, R. (1985). The benthic macrofauna of the Bot River estuary, South Africa, with a note on its meiofauna. Trans. Roy. Soc. S. Afr., 45, pp. 379–96, illustr.CrossRefGoogle Scholar
Decker, H.P. de & Bennett, B.A. (1985). A comparison of the physiological condition of the Southern Mullet, Liza richardsoni (Smith), in a closed estuary and in the sea. Trans. Roy. Soc. S. Afr., 45, pp. 427–36, illustr.CrossRefGoogle Scholar
Drummond, M. (1975). Conflicts in an Estuary: A Study of the Lymington River. Ilex Press, Lymington, England, UK: viii + 83 pp., illustr.Google Scholar
Healy, W.B. (1980). A New Zealand research programme to assist community management of an estuary. Pp. 59–65 in Estuarine Perspectives (Ed. Kennedy, V.S.). Academic Press, New York, NY, USA: xxi + 553 pp., illustr.CrossRefGoogle Scholar
Heinecken, T.J.E. & Damstra, K. St J. (1983). Report No. 24: Onrus (CSW 14). Coun. Sci. Indust. Res. Rep., 423, pp. 1–37, illustr.Google Scholar
Heydorn, A.E.F. & Tinley, K.L. (1980). Estuaries of the Cape, Part 1: Synopsis of the Cape Coast: Natural features, dynamics and utilization. Coun. Sci. Indust. Res. Rep., 380, pp. 1–96, illustr.Google Scholar
Heyl, C.W. & Currie, M.H. (1985). Variations in the use of the Botriviervlei by waterbirds. Trans. Roy. Soc. S. Afr., 45, pp. 397–418, illustr.Google Scholar
International Union for Conservation of Nature and Natural Resources [cited as IUCN] (1980). World Conservation Strategy: Living Resource Conservation for Sustainable Development. IUCN, Avenue du Mont-Blanc, 1196 Gland, Switzerland: pack of c. 50 unnumbered pages in stiff paper folder.Google Scholar
Koop, K. (1982). Report No. 18. Bot/Kleinmond system (CSW 13). Coun. Sci. Indust. Res. Rep., 417, pp. 1–62, illustr.Google Scholar
Koop, K., Bally, R. & McQuaid, C.D. (1983). The ecology of South African estuaries, Part XII: The Bot River, a closed estuary in the south-western Cape. S. Afr. J. Zool., 18, pp. 1–10, illustr.Google Scholar
Mandelli, E. (1981). On the hydrography and chemistry of some coastal lagoons of the Pacific coast of Mexico. Pp. 81–95 in Coastal Lagoon Research, Present and Future (Eds Lasserre, P. & Postma, H.). (UNESCO Technical Papers in Marine Science No. 33.) UNESCO, Paris, France: 348 pp., illustr.Google Scholar
Phleger, F.B. (1981). A review of some general features of coastal lagoons. Pp. 7–14 in Coastal Lagoon Research, Present and Future (Eds Lasserre, P. & Postma, H.). (UNESCO Technical Papers in Marine Science No. 33.) UNESCO, Paris, France: 348 pp., illustr.Google Scholar
Siegfried, W.R., Frost, P.G.H., Cooper, J. & Kemp, A.C. (1976). South African Red Data Book—Aves. S. Afr. Natl Sci. Prog. Rep., 7, pp. 1–108.Google Scholar
Underhill, L.G. & Cooper, J. (1982). Counts of Waterbirds at Coastal Wetlands in Southern Africa, 1978–1981. Western Cape Wader Study Group and Percy FitzPatrick Institute of African Ornithology, Cape Town, South Africa: 252 pp.Google Scholar
Willis, J.P. (1985). The bathymetry, environmental parameters, and sediments, of the Bot Riverestuary S.W. Cape Province. Trans. Roy. Soc. S. Afr., 45, pp. 253–84, illustr.Google Scholar