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Znaczenie leszczyny w formowaniu struktury glebowych zgrupowań skoczogonków w lasach grądowych Wigierskiego Parku Narodowego
A comparative analysis of the taxonomic and ecological structure of collembolan assemblages in the subcontinental oak-hornbeam forests of the Wigierski National Park with different projective coverages of hazel was carried out. The obtained results indicated that the fauna of the Collembola in the studied forests of the Wigierski NP is represented by 51 species belonging to 31 genera and 11 families. The fewest species were recorded in the areas without hazel, and the most were recorded with its participation. The obtained data indicate that the absence of hazel or its small presence leads to a decrease in the species richness of Collembola assemblages. On the other hand, the presence of hazel in the experimental plots of the oak-hornbeam forest allows more species of Collembola to survive both at the level of point and coenotic alpha-diversity richness according to P. Whittaker. This may indicate that in the studied forest communities with a significant presence of hazel, the capacity of the environment for Collembola increases, compared to those where hazel is absent or represented by a small number of woody shrubs. However, the detected changes in the studied taxocenes are insignificant and relate mainly to indicators of inventory species richness according to P. Whittaker, as well as the numerical ratio of species.
Nowe gatunki grzybów makroskopijnych w biocie Wigierskiego Parku Narodowego
In the year 2021 mycological investigations were carried out in the Wigierski National Park (NE Poland). Fifteen 0.04-ha plots, including 5 with low proportion of hazel (< 30%) and 10 with high proportion of hazel (≥ 75%) in the understory, were established in phytocoenoses of a mesophilous oak-linden hornbeam forest (Tilio cordatae-Carpinetum betuli). Macrofungi were surveyed on these plots during the summer and autumn season based on the presence/absence of sporocarps. As a result, 320 taxa of fungi have been recorded, which accounts for ca 28% of macrofungi biota of the park. During this survey 28 species new to this area have been found. The paper provides information about their localities and habitats.
Parmelia submontana Nádv. ex Hale – new records in Poland
Parmelia submontana is quite a rare epiphytic lichen in both Poland and central Europe. In Poland, it grows mainly in the mountains and in the northern part of the country. We found eight new localities of P. submontana, in northern and southwestern Poland. We report it here as a new species for Wigry National Park. Distribution of the species in Poland is presented on the map.