Protected areas in regions of intensive economical activity: conflict of nature protection and nature use (case study of Dovine river catchment)
Fájlok
Dátum
Folyóirat címe
Folyóirat ISSN
Kötet címe (évfolyam száma)
Kiadó
University of Debrecen, Institute of Earth Sciences
Absztrakt
Leírás
Nature protection and economical activity clash of interests is analysed on the example of DovinėRiver catchment, situated in the south western part of Lithuania. It is a unique wetland complex consisting from Žuvintas Lake and the surrounding bogs (Fig. 1). Žuvintas Lake became the first protected area in Lithuania in 1937. However, the lake is situated in one of the most fertile region ofLithuania, where the methods of intensive farming activity is being employed for a long time. Eutrophication processes and overgrowth of this shallow lake has been very active during the several decades and the lake has lost its ecological value. Therefore the main goal of this article is to analyse theanthropogenic influence towards the water bodies and protected natural values situated in the territoryof intensive economical activity. Cartographical material of different periods is being used for theevaluation of the hydrographical network transformations in Dovinė River catchment. Hydrochemicalparameters of the periods 1953–1954, 1960–1961, 1980–1982; 1993–2003; 2004–2005 of the waterbodies in Dovinė River catchment are being analysed. The field works in order to investigate thewater quality in Dovinė River and it‘s tributaries were made in spring of 2005. Water samples wereanalysed in laboratory of the Institute of Geology and Geography according water quality analysismethods approved by Lithuanian Ministry of Environment (Table 2). Water quality was evaluatedaccording maximum residue limits (MRL) in surface waters (Table 3). The results of the studyshowed that although Žuvintas Lake is being protected for 70 years, the farming activity intensifiedconstantly in its catchment. Canalised river beds and sluice–regulated hydrological regime of thelakes diminished the natural self–cleaning abilities of the water system. The average annual decreaseof the lake specular surface was about 1,1 ha in the period of 1961–2003. The average annual increaseof vegetation area is about 0,14 ha. Even a strong protection regime did not preserve this territory.Therefore, in order to keep the sustainable development in the protected territories the anthropogenicloading from the neighbouring territories (catchment area, etc) must be evaluated. The objectives ofnature protection in protected territory could not be attained if there is no regulation of economicalactivity in the territories surrounding the protected area.
Kulcsszavak
Žuvintas Lake, anthropogenic influence, hydrographical network transformations, water quality