出版社：Polish Society of Ecological Engineering (PTIE)
摘要：In areas of medium mountains including the landscape of the Low Beskids, turf communities guarantee biodiversity increasing the value of open landscape and protecting soil from erosion.The aim of this study was to show the diversity of diatom communities from the genus Eunotia and Pinnularia developing on soils under conditions of varied landscape use (meadows, pastures, fallow lands).The research was carried out within the catchment area of the Ryjak stream in the Magura National Park together with the buffer zone at three sites.The water content varied in the studied soils with fluctuating moisture content depending on the season and the research year.On the other hand, the pH values indicated high acidification of the studied soils.Diatomaceous analysis showed numerous occurrences of the genus Eunotia (12 taxa) and Pinnularia (18 taxa).The acid reaction of the soil undoubtedly favored the development of diatoms of these genera.Most species of the genera Eunotia and Pinnularia usually developed individually, except for Pinnularia borealis and P.obscura.They are typically soil species, therefore they often dominated in the material and occurred in most of the research seasons.Apart from cosmopolitan diatoms, rare or endangered taxa from the Red List of Polish Algae (Siemińska et al.2006) were also found on soils.Four species belonged to the extinct category (E): Eunotia botuliformis F.Wild, Nörpel & Lange-Bert., Pinnularia nodosa (Ehrenberg) Smith, P.schoenfelderi and P.viridiformis Krammer.Canonical analysis (CCA) demonstrated a rather low statistical significance of the impact of environmental parameters (pH and humidity) on the differentiation of diatom communities.It only confirmed the fact that diatoms develop better in environment with permanent or at least periodic moisture, compared to dry habitats.
