Phytosociological Data in Assessment of Anthropogenic Changes in Vegetation of Rzeszów Reservoir

Maria Ziaja, Tomasz Wójcik and Małgorzata Wrzesień
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Maria Ziaja: Institute of Physical Culture Studies, Rzeszow University, Cicha 2A, 35-326 Rzeszów, Poland
Tomasz Wójcik: Institute of Agricultural Sciences, Land Management and Environmental Protection, Rzeszow University, Zelwerowicza 4, 35-601 Rzeszów, Poland
Małgorzata Wrzesień: Institute of Biological Sciences, Maria Curie-Skłodowska University, Akademicka 19, 20-033 Lublin, Poland

Sustainability, 2021, vol. 13, issue 16, 1-14

Abstract: Phytosociological research on aquatic and marsh vegetation was conducted in Rzeszów Reservoir (SE Poland): 134 relevés according to the Braun-Blanquet method were collected there in 2016 and compared to 91 relevés published in 1994 (225 relevés in total). Changes in vegetation type, diversity measures, species composition, and Ellenberg Indicator Values (EIVs) for light, moisture, reaction, and nitrogen were analysed. Over the 22 years (1994–2016), the greatest changes were noted in communities of the classes Lemnetea and Potametea and the alliance Salicion albae . The long-term observations demonstrated the disappearance of 14 phytocoenoses and the occurrence of 12 new ones. An expansion of marsh communities ( Typhetum latifoliae , Typhetum angustifoliae , Glycerietum maximae , Leersietum oryzoidis ) was noted, causing a decline of several species and vegetation types. According to canonical correspondence analysis (CCA), four environmental variables (light, moisture, nitrogen, and pH) were related to plant distribution. The strong disturbances reflected in intensive eutrophication were due to human activity, which is the main factor shaping the ecological succession and overgrowing of the reservoir.

Keywords: aquatic ecosystems; biodiversity; central Europe; ecological succession; eutrophication; plant associations; transformation of vegetation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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