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1 Polish Journal of Ecology

1 2002

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Diversity, disturbance and spatial structure of wetland vegetation along a lake shore : Jorka river-lake system (Masurian Lakeland, Poland

Kloss M., Wilpiszewska I.

Polish Journal of Ecology

2002

Vol. 50, nr 4

489-513

In 1997-1999, phytosociological studies of the riparian vegetation were conducted in the Jorka River-Lake system, Masurian Lakeland, Poland. This vegetation performs an important function as a barrier for various chemicals, counteracting lake eutrophication. In total, 26 plant communities were identified. The riparian vegetation was represented by phytocoenoses of the classes: Alnetea glutinosae, Salicetea purpureae, Querco-Fagetea, Artemisietea and Molinio-Arrhenatheretea. The littoral vegetation comprised phytocoenoses of the classes Phragmitetea and Potamogetonetea. Plant communities typically occur in the form of strips along rivers or lake shores, and on rare occasions in the form of mosaics of overlapping patches. The degree of the transformation of riparian vegetation relative to its natural state was estimated. The plant cover was disturbed by man along 80% of the shoreline length. Spatial distribution of phytocoenoses was analysed in details along 13 transects.