Paprotnik kolczysty Polystichum aculeatum (L.) Roth w Sudetach
Journal Title: Przyroda Sudetów - Year 2017, Vol 20, Issue
Abstract
The hard-shield fern Polystichum aculeatum (L.) Roth in the Sudetes We present the historic and present distribution of the hard-shield fern Polystichum aculeatum in the Sudetes and their foothills, based on the available literature, unpublished inventories (especially those made after 2004, when the species was included in the list of protected plants in Poland) and our own studies. In 1881-2016 there were 100 records of the species; 73 of them were confirmed in the 21st c. Consequently, nearly 20% of the species’ localities in the Sudetes disappeared, or the abundance of the plant decreased drastically, rendering its finding difficult. The localities in deep and shady gorges with specific montane microclimate (especially in the Stołowe and Orlickie Mts, as well as in the valleys of Pełcznica and Szczawnik, and in Myśliborski Gorge), associated with slope forests of the association Tilio-Acerion seem to be the best preserved. The localities in rich beech forests, which constitute most of the records not confirmed, are more prone to disappearance. Forest management uncovering the forest floor (clear-felling) and quarrying (2 documented sites) may have contributed to the decline. The relatively narrow ecological amplitude of Polystichum aculeatum may increase the vulnerability of the species in case of further increase in annual temperatures and repeated, long-lasting droughts associated with anthropogenic disturbance of climate.
Authors and Affiliations
Krzysztof Świerkosz, Kamila Reczyńska
Keywords
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