Impact of site condition on the natural value of selected meadow communities of the lowland and the mountain regions
2007
Kryszak, J., Agricultural University of Poznań, ul. Wojska Polskiego, Poznań (Poland) | Krajčovič, V., Agricultural University of Poznań, ul. Wojska Polskiego, Poznań (Poland)
The study presents the analysis of about 500 phytosociological releves of selected grassland communities of the Molinio-Arrhenatheretea class occurring in the mountains of the Karpacz surroundings (about 100 surveys) and on the lowland in the Wielkopolska region (about 400 surveys). The aim of analysis was to determinate natural value of the selected grassland communities on the basis of their floristic composition, number of species, Shannon-Wiener index of species diversity and valorization of the plant communities according to method of Oswit. The site conditions of the examined meadow communities were evaluated using the Ellenbergs phyto-indication and determining content of P, K and Mg in soil by conventional laboratory methods. Meadow plant communities occurring in the mountains are characteristic by higher natural values, smaller changes of their floristic composition in comparison with typical forms, higher number of species and higher diversity index than those occurring on the lowland. Site moisture situations affected by higher precipitation and smaller human interference in the environment, belonged to the more important factors influencing the higher natural values of meadow plant communities in the mountains. Meadow communities situated on lowlands are characterized by poorer natural values which can be attributed to the indirect man's influence on the site conditions which are the result of the performed land reclamation and soil mineral fertilization.
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