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  • Author: Andrzej Brzeg x
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Abstract

In this paper, changes of the non-forest xerothermic vegetation of the “Murawy Dobromierskie” steppe reserve which occurred in the period 1993-2012 are examined. The material comprises 50 relevés, of which 43 date from 2012 and the other 7 - from 1993. Reléves were arranged in 5 analytic tables. A synoptic table was also compiled, and for each syntaxonomical species group distinguished, values of the cover coefficient (C), the collective group share index (G), and the systematic group value (D) were estimated and compared. On the basis of the obtained results, a significant decline in abundancy and/or constancy was observed within the following groups: Ch. Artemisietea vulgaris, Ch. Cirsio-Brachypodion pinnati, Ch. Festuco-Brometea, Ch. Geranion sanguinei, Ch. Koelerio-Corynephoretea, and Ch. Origanetalia and Trifolio-Geranietea sanguinei, whereas for the taxa of the Rhamno-Prunetea, a notable increase in the share of the reserve vegetation was recorded. A sizeable expansion of the moss layer was also observed in this period. The results are discussed with special regard to differences in the methodical background of both field studies.

Abstract

The study areas, located in northern and western Poland, comprised 30 villages of the Lubuskie Lakeland region and 18 in central Pomerania. A total number of recorded associations and local communities of similar rank was counted as 243. In the list prevailed natural and seminatural communities. The endangered associations composed about 47.3% of the whole list of communities. Altogether, 8 communities, assessed as directly endangered, occurred in the villages or their vicinity. Comparison of plant communities of both regions revealed that the structure of vegetation shows many affinities, while the differences are more of qualitative than quantitative character. The diversity of vegetation of rural landscapes was slightly higher in the central Pomerania. The rural landscape of Lubuskie Lakeland was more transformed, richer in ruderal communities, whereas in Pomerania more represented were natural and seminatural communities. The rural landscape of both studied areas is still rich and diversified but recently undergoes transformations leading to its impoverishment and unification as a result of either abandonment of land use or its intensification and new forms of human impact.

Abstract

Studies of the flora of villages in a connection with the surrounding landscape are rare and mostly limited to the built-up area and its general location in a geographical region. Thus, the aim of this study was to examine the diversity patterns of flora against the background of local landscape units in the rural areas and to analyse them in the context of village transformation. The study comprised 30 villages of medieval origin representing the oval-shape type, with differently preserved structure of built-up area and cultivated fields, located in the Lubuskie Lakeland. The terrain within a buffer zone of 200 m in width, located outside of the built-up area, was divided into spatial complexes. In each of these complexes, floristic lists were compiled. The structure of surrounding landscape within the buffer zone of 1 km in width, measuring from the village centroid, was analysed using ArcGIS.

The recorded flora comprised 767 taxa of spontaneously occurring vascular plants. Extremely rare and common species were the most numerous. Native species distinctly prevailed over alien in all types of spatial complexes and the majority of them occurred in the habitats transformed by man. There were noted altogether 244 species of anthropophytes.

The index of anthropophytization of flora (WAnt) showed that both types of built-up areas (transformed and non-transformed) reached the highest values, slightly higher than fields and central green. Index of flora modernization (WM) showed the same pattern. Only water bodies were strikingly different from other complexes in respect to both indices (WAnt - significantly lower values, while WM - much higher). Differences in the floristic composition of transformed and non-transformed villages were not significant at the level of whole village. The villages were still harbouring rare species from the group of relics of former cultivation and archaeophytes, but observations conducted since 2007 confirmed that they have been decreasing in number. The percentage of groups of species with different affinity toward urban areas have shown that in the studied rural areas, the share of urbanophilic species is still very low as compared to the dominant group of urbanoneutral and moderately urbanophobic species.

Abstract

The paper gives the results of studies on vegetation complexes of 12 islands and several skerries, situated within the inner part of SW Finnish archipelago. There were differentiated 14 types of complexes, comprising all types of communities (of vascular plants, mosses and lichens). All complexes are characterised by a repetitive combination of communities. Their distribution, showing distinct regularities in relation to geology, geomorphology and situation on an island, is depicted in the map.

Abstract

The paper shows the results of floristic investigations of 12 islands and several skerries of the inner part of SW Finnish archipelago, situated within a square of 11.56 km2. The research comprised all vascular plants – growing spontaneously and cultivated, and the results were compared to the present flora of a square 10 × 10 km from the Atlas of Vascular Plants of Finland, in which the studied area is nested. The total flora counted 611 species, among them, 535 growing spontaneously or escapees from cultivation, and 76 exclusively in cultivation. The results showed that the flora of Seili and adjacent islands was almost as rich in species as that recorded in the square 10 × 10 km. This study contributed 74 new species to this square. The hitherto published analyses from this area did not focus on origin (geographic-historical groups), socioecological groups, life forms and on the degree of threat of recorded species. Spontaneous flora of the studied area constituted about 44% of the whole flora of Regio aboënsis. In the studied flora, 22 species threatened in Finland were found.