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Biological Conservation Implications of Water-level Fluctuations in a Wetland of International Importance: Lake Kerkini, Macedonia, Greece

Published online by Cambridge University Press:  24 August 2009

Myrto Pyrovetsi  and
Evanthia Papastergiadou
Myrto Pyrovetsi
Affiliation:
Assistant Professor, Department of Ecology, School of Biology, Aristotle University of Thessaloniki, 540 06 Thessaloniki, Greece
Evanthia Papastergiadou
Affiliation:
Department of Systematic Botany and Phytogeography, Aristotle University of Thessaloniki, 540 06 Thessaloniki, Greece.
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Kerkini Lake in Greece, a reservoir maintained principally for agricultural irrigation purposes on the Strymon River, has been classified as a ‘Wetland of International Importance’ according to the Ramsar Convention. Hydrological conditions favoured the formation of a shallow, very productive lake, rich in species diversity and biotic abundance. The importance of the wetland lay in its complex zonation of various habitats which mainly consisted of: shallow open water with sand-strips, beaches, and mud-flats; shallow-water areas with communities of emergent vegetation; a lowland hardwood riparian forest mainly of Salix and Tamarix species; a shrub-swamp; and extensive wet meadows. The diversity of habitats supported a rich waterbird fauna for breeding, stationing during migration, and wintering.

Nevertheless, in 1982 a new high-dam was constructed, higher embankments along the banks of the Lake were established, and other works were carried out (to increase the water capacity of the reservoir), in response to irrigation demands. No consideration was given to the wetland resources. Operation of the new dam resulted in changes in the flooding etc. regime, with severe impact on the biotic resources of the wetland, especially by waterlevel increases of more than 5 m in less than 4 months during spring — the critical growing- and breedingseason. Wetland heterogeneity and the mosaic structure of water-land-vegetation were thereby lost.

Now the riparian forest is diminishing in area and declining in productivity, the reed-swamp with emergent macrophytes has been lost, and wet meadows have also disappeared. Deep flooding and the loss of these habitats is reflected in marked decline in the densities of migratory waterbird populations and, most important, in drastic shrinkage in the populations of breeding species. Similar impact is observed in the dramatic decline of fish species diversity and abundance. In general, nowadays, Kerkini presents an alarming example of loss of biodiversity and accelerating impoverishment of its former biotic resources.

In view of the projected plans to increase further the water-storage capacity of the Lake by raising its waterlevel, measures are urgently needed: (a) for preventing such actions; (b) for restoring and maintaining marsh conditions, and (c) for ecologically sound management and sustainable use of the wetland resources.

Type
Main Papers
Information
Environmental Conservation , Volume 19 , Issue 3 , Autumn 1992 , pp. 235 - 244
Copyright
Copyright © Foundation for Environmental Conservation 1992

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References

Athanasiou, H. (1987). Past and Present Importance of Greek Wetlands for Wintering Waterfowl. IWRB Report, 63 pp.Google Scholar
Babalonas, D. & Papastergiadou, E. (1989). The Water-fern Salvinia natans (L.) All. in the Kerkini Lake (North Greece). Arch. Hydrobiol., 116(4), pp. 487–98, illustr.CrossRefGoogle Scholar
Baxter, R.M. & Glaude, P. (1980). Environmental effects of dams and impoundments in Canada: experience and prospects. Can. Bull. Fish. Aquat. Sci., 206, 34 pp., illustr.Google Scholar
Braun-Blanquet, J. (1964). Pflanzensoziologie. Springer, Wien, Austria: 865 pp.CrossRefGoogle Scholar
Brock, Th. C.M., Velde, G. van der & Steeg, H.M. van der (1987). The effects of extreme water level fluctuations on the wetland vegetation of a nymphaeid-dominated oxbow lake in the Netherlands. Arch. Hydrobiol. Beih., 27, pp. 57–73, illustr.Google Scholar
Burger, J. (1985). Habitat selection in temperate marsh nesting birds. Pp. 253–81 in Habitat Selection in Birds (Ed. Cody, M.). Academic Press, London, England, UK: 558 pp., illustr.Google Scholar
Castri, F. di, Hansen, A.J. & Holland, M.M. (1988). A new look at ecotones. Biology International, Special Issue, 17, 163 pp.Google Scholar
Cowardin, L.M., Carter, V., Golet, F.C. & Large, E.T. (1979). Classification of Wetlands and Deepwater Habitats of the United States. US Fish & Wildlife Service Pub. FWS/OBS - 79/31, Washington, DC, USA: 103 pp.CrossRefGoogle Scholar
Dautopoulos, G. & Pyrovetsi, M. (1990). Comparison of conservation attitudes among fishermen in three protected lakes in Greece. Journal of Environmental Management, 31, pp. 83–92.CrossRefGoogle Scholar
Economides, P. (1974). [Morphological, Systematic and Zoogeographical Study of Freshwater Fishes in E. Macedonia and Thrace.] Doctoral Thesis, Aristotelian University of Thessaloniki, Thessaloniki, Greece: 179 pp. [in Greek].Google Scholar
Ellis, M.M. (1941). Freshwater impoundments. Trans. Am. Fish. Soc., 71, pp. 80–93, illustr.CrossRefGoogle Scholar
Ewel, K. (1978). Riparian ecosystems: conservation of their unique characteristics. Pp. 56–61 in Proceeding of the Symposium on ‘Strategies for Protection and Management of Floodplain Wetlands and Other Riparian Ecosystems 1978’. US Department of Agriculture Forest Service, GTR-WO-12, illustr.Google Scholar
Farahat, A.Z. & Nopp, H. (1966). Uber die Bodenatmung im Schilfgurtel des Neusiedler Sees. Sitz. Ber. Oesterr. Akad. Wiss., math.-nat KI.I, 75, pp. 237–55.Google Scholar
Farahat, A.Z. & Nopp, H. (1967). Jahreszeitliche Anderungen der Bodenatmung im Schilfgurtel des Neusiedler Sees. Ariz, math.-nat. kl Oesterr. Akad. Wiss., 9, pp. 220–3.Google Scholar
Fischer, S.G. & Voy, A. La (1972). Differences in littoral fauna due to fluctuating water levels below a hydroelectric dam. J. Fish. Res. Board Can., 29, pp. 1472–6.CrossRefGoogle Scholar
Fredrickson, L.H. (1979). Lowland hardwood wetlands: current status and habitat values for wildlife. Pp. 296–306 in Wetland Functions and Values: The State of Our Understanding (Eds Greeson, P.E., Clark, J.R. & Clark, J.E.). American Water Resources Assoc., Minneapolis, Minnesota, USA: [not available for checking].Google Scholar
Gerakis, P. (1990). [Conservation and Management of Greek Wetlands]. WWF & Aristotelian University of Thessaloniki, Thessaloniki, Greece: 606 pp. [in Greek].Google Scholar
Gosselink, J.G. & Turner, R.E. (1978). The role of hydrology in freshwater wetland ecosystems. Pp. 63–78 in Freshwater Wetlands: Ecological Processes and Management Potential (Eds Good, R.E., Whigham, D.F. & Simpson, R.L.). Academic Press, New York, NY, USA: [not available for checking].Google Scholar
Crawford, R.M.M. (1976). Tolerance of anoxia and the regulation of glycolysis in tree roots. Pages 387–401 in Tree Physiology and Yield (Eds M.G.R. Cannell & F.T. Last). [Not available for checking.]Google Scholar
Guppy, H.B. (1897). On the postponement of the germination of the seeds of aquatic plants. Proc. Roy. Physiol. Soc. Edinburgh, 13, pp. 344–99.Google Scholar
Hallmann, B. (1981). Note on bird nesting and conservation of some Greek wetlands. Nature, Bull. Hellenic Soc. Protection Nature, 25, pp. 44–88, illustr.Google Scholar
Heslop-Harrison, Y. (1955). Nymphaea L. em. Sm. (nom. conserv.). (Biological Flora of the British Isles.) J. Ecol., 43, pp. 719–34, illustr.CrossRefGoogle Scholar
Hynes, H.B.N. (1973). The effects of sediment on the biota in running water. Pp. 652–63 in Fluvial Processes and Sedimentation. Proc. Hydrology Symposium, Edmonton, Alberta, Canada, 05 1973. [Not available for checking.]Google Scholar
IUCN Threatened Plants Committee Secretariat (1982). The rare, threatened and endemic plants of Greece. Ann. Mussei Goulandris, 5, pp. 69–105, illustr.Google Scholar
Jerrentrup, H. (1990). Fauna of Lake Kerkini. Pp. 317–28 in Gerakis (q.v.).Google Scholar
Kamarianos, A., Kilikidis, S., Karamanlis, J., Fotis, G. & Kousouris, Th. (1989). [Management of the artificial lakes Kerkini and Polyfytou for the improvement of their fisheries.] Paper presented at the Conference ‘Environmental Conservation and Agricultural Production’ Thessaloniki, Greece [in Greek].Google Scholar
Klossas, A. (1975). [Contribution to hydrobiological studies of artificial Lake Kerkini.] Ministry of Agriculture, Athens, Greece: 61 pp. [in Greek].Google Scholar
Kopf, F. (1964). Die vahren Ausmasse des Neusidlersees. Oesterr. Wasserwirtschaft, 16 (1.12), pp. 255–62.Google Scholar
Lanaras, Th. (1990). Presence of toxic Cyanobacteria on Lakes Kerkini and Vistonis. Pp. 109–17 in Pyrovetsi (q.v.).Google Scholar
Lavrentiades, G. (1956). [On the Hydrophytes of Greek Macedonia.] PhD thesis, Aristotelian University of Thessaloniki, Thessaloniki, Greece: 150 pp. [in Greek].Google Scholar
Ministry of Agriculture (1991). [Fisheries Statistics at Lake Kerkini.] Dupl. Manuscr. Series, Ministry of Agriculture, Athens, Greece: [in Greek].Google Scholar
Ministry of the Environment (1986). [Delineation of the Ramsar Convention Wetlands: Lake Kerkini.] Ministry of the Environment, Athens, Greece: 91 pp. + maps [in Greek].Google Scholar
Ministry of Youth and Sports (1984). [Kerkini-Doirani.] Ministry of Youth and Sports, Athens, Greece: 142 pp. + maps [in Greek].Google Scholar
Mitsch, W.J. & Gosselink, J.G. (1986). Wetlands. Van Nostrand Reinhold Company, New York, NY, USA: 539 pp., illustr.Google Scholar
Monks, J. & Ulen, J. (1929). [Study on the hydraulic works at Seres and Drama area.] Unpublished manuscript [in Greek]. [Not available for checking.]Google Scholar
Papastergiadou, E. (1990). [Phytosociological and Ecological Studies of Aquatic Macrophytes (Hydrophytes) in Northern Greece.] PhD thesis, Aristotelian University of Thessaloniki, Thessaloniki, Greece: 266 pp. [in Greek].Google Scholar
Papastergiadou, E. & Babalonas, D. (1992). Ecological studies on aquatic macrophytes of a dam lake — Lake Kerkini, Greece. Arch. Hydrobiol., Suppl. 90 (3), pp. 1–20.Google Scholar
Patterson, J.H. (1976). The role of the environmental heterogeneity in the regulation of duck populations. Journal of Wildlife Management, 40(1), pp. 22–32, illustr.CrossRefGoogle Scholar
Psilovicos, A. (1988). Changes in Greek Wetlands During the Twentieth Century: The Cases of the Macedonian Inland Waters and of the River Deltas of the Aegean and Ionian Coasts. WWF: Conservation and Management of Greek Wetlands: Strategies and Action Plan, 22 pp.Google Scholar
Pyrovetsi, M. (1990). Conservation and Management of the Biotopes of the Dalmatian Pelican (Pelecanus crispus L.) in Northern Greece. Commission of European Communities (DGXI) and Aristotelian University of Thessaloniki, Thessaloniki, Greece: 145 pp.Google Scholar
Sale, P.J.M. & Wetzel, R. (1983). Growth and metabolism of Typha species in relation to cutting treatment. Aquatic Botany, 15, pp. 321–34, illustr.CrossRefGoogle Scholar
Sevastos, C.G. (1976). National Report for Greece, Proc. Int. Conf. Cons. Wetlands and Waterfowl, Heiligenhafen, 1974, IWRB. pp. 97–102. [Not available for checking.]Google Scholar
Steinmann, F. & Brandle, R. (1984). Auswirkungen von Halmverlusten auf den Kohlehydratstoffwechsel uberfluteter see-binserhizone Schoenoplectus lacustris (L.) Pallas. Flora, 175, pp. 295–9, illustr.CrossRefGoogle Scholar
Steward, R.E. & Kantrud, H.A. (1972). Vegetation of the prairie potholes, North Dakota, in relation to quality of water and other environmental factors. US Geological Survey Prod. Paper 585-D, 36 pp.CrossRefGoogle Scholar
Sziji, J. (1982). Report of Observations and Negotiations Concerning Kerkini Lake, March/April 1982. University of Essen, Germany: 14 pp.Google Scholar
Trotzky, H.M. & Gregory, R.W. (1974). The effects of water flow manipulation below a hydroelectric power dam on the bottom fauna of the upper Kennebec River, Maine. Trans. Am. Fish. Soc., 103, pp. 318–24.2.0.CO;2>CrossRefGoogle Scholar
Tsachalidis, E. (1990). [Biology and Behavioural Ecology of the Little Egret (Egretta garzetta) in the Artificial Lake Kerkini, Seres.] PhD thesis, Aristotelian University of Thessaloniki, Thessaloniki, Greece: 146 pp. [in Greek].Google Scholar
Velde, G. van der (1978). Structure and function of nymphaeiddominated systems. Proc. EWRS 5th Symp. on Aquatic Weeds, 1978, pp. 127–33.Google Scholar
Velde, G. van der (1980). Studies on Nymphaeid-dominated Systems with Species Emphasis on Those Dominated by Nymphoides peltata (Gmel.) O. Kuntze (Menyanthaceae). PhD thesis, Nijmegen, The Netherlands: 163 pp., illustr.Google Scholar
Ward, J.V. (1976). Effects of flow patterns below large dams on stream benthos: a review. Pp. 235–53 in Instream Flow Needs (Eds J.F. Orsborn & C.H. Allman). Symp. Am. Fish. Soc. [Not available for checking.]Google Scholar