Walory przyrodnicze wybranych muraw psammofilnych w warunkach wypasu owiec w rezerwacie przyrody Kózki
Journal Title: Łąkarstwo w Polsce - Year 2015, Vol 18, Issue
Abstract
The studies of vegetation were carried out in the years 2010-2013. One of the study objectives was to update the assessment of the natural value of psammophilous grasslands 20 years after the establishment of Kózki nature reserve, mazowieckie voivodship. The phytosociological survey results were correlated with the archive survey results, available in the nature reserve’s documentation. The assessment of natural value takes into account the status of psammophilous grasslands in the protection of environmentally valuable habitats according to Annex I of the Habitats Directive, presence of indicator species for dry grasslands, species that are endangered and under legal protection. The results of the phytosociological survey conducted in the study area within Kózki nature reserve confirmed the occurrence of 81 plant species, mostly belonging to the Koelerio glaucae Corynephoretea canescentis class and Molinio-Arrhenatheretea class. The comparison of phytosociological relevés indicates some changes in the species composition of the communities under study. Some species withdrew from the sward while others appeared.Vegetation growing on loose psammophilous grasslands was represented by species characteristic of the Corynephorion canescentis alliance and Spergulo-Corynephoretum association, with a considerable share of Cladina mitis. Areas with greater sward density were represented by patches of the Diantho- Armerietum elongate association, with a considerable share of species from the Molinio-Arrhenatheretea class. In the central part of the study area, a simplified form of the Corynephoro-Silenetum tataricae association was found, with the predominance of the distinguishing species Calamagrostis epigejos and small share of Carex praecox (the typical form of this community, with the presence of characteristic species – Silene tatarica i Petasites spurius – occurred in the northern part of Kózki nature reserve, outside of the study area). The vegetation of the Corynephoro-Silenetum tataricae association occurs in priority habitats for protection (Annex I of the Habitats Directive). The currently growing population of Calamagrostis epigejos within the community under study is not only indicative of the expansiveness of this species but also of the need for environmental surveillance also under conditions of active protection of sensitive, environmentally valuable habitats. In the sward of the communities under study, the presence of 6 dry grassland indicator species, also the presence of one endangered species (Carex praecox) and one (Helichrysum arenarium) under legal protection was confirmed. Higher contents of Carex praecox in the sward were recorded in areas with extensive grazing of Świniarka sheep, which indicates a positive influence of pasturage for the durability of this species.
Authors and Affiliations
Marianna Warda, Mariusz Kulik, Tomasz Gruszecki, Antoni Lipiec, Robert Zubel
Keywords
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