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A study of Collembola communities was carried out in Pinus silvestris stands of various ages in Puszcza Białowieska. The study revealed that the Collembola communities become stabilised In an older pine plantations (poole wood).
Species composition, community structure and microhabitat preferences have been studied in Protura of Polish pine forests. 6 Protura species have been identified, namely, Eosentomon semiarmatum, E. vulgare, E. mariae', Berberentulus polonicus, E. pratense and E. pinetorum. The abundance of the communities studied was low (14.2 - 17.9 ind./sq.m.). Imagines in the investigated material constitute 68.2%, i naturi juniores - 23.2%, larvae II - 5.5%, larvae I – 3.1%.
Authors compared collembolan communities dwelling urboecosystems of Eastern and Central Europe using urban greens of Moscow and Warsaw as an example. Two types of urban biotopes (parks and street lawns) were anałysed in comparison to non-urban forests and meadows. The regional peculiarities of springtail communities in the same type of urboecosystems were investigated. It was revealed that communities of soil-dwelling Collembola in parks of different cities are more similar than those of street lawns.
Species composition and community structure of Collembola communities under the crowns of single trees were studied in non-urban and urban environments in order to reveal their possible significance in spatial organization in open biotopes. In a natural environments single trees may play an important role acting as refugia for forest species as well as a normal habitat for some eurytopic meadow forms. In urban habitats, the effect of single trees on collembolan community organization is much weaker. The ecotone effects of single trees is also discussed.
Species composition of Collembola has been studied in comparable pine forest areas situated in various regions of Central and Eastern Europe. 45 Collembola species have been found. Agroup of Collembola specic s characteristic of "mossy" pine forests has been identified.
Species composition, abundance and variations of dominance structure of communities of spiders Inhabiting tree canopies have been studied in forest stands of different ages situated in pine forest sites belonging to two regional associations: the subcontinental pine forest (Puszcza Białowieska, Puszcza Biała) and the suboceanic pine forest (Bory Tucholskie). The study has revealed that the greatest differences in both species composition and abundance of spider communities are associated with the age of the forest stand. The following species were most frequent and abundant in the tree canopy spider communities studied: Atea Sturmi, Euryclubiona subsultans, Theridion tinctum, Hellophanus dubius.
Review of zoological expedition organized by Institute of Zoology PAS to North Korea and list of papers based on the material collected in Korean Peninsula are presented.
Isotomiella hygrophila sp. nov. from the Biebrza ice-marginal valley in NE Poland is described. Notes on distribution and systematic relationship are given.
Anurida riverina sp. nov. from river floodplains of Poland is described. Notes on distribution and systematic relationship are given.
The species composition, nest density, structure and ecological profile of an ant community were studied within a transect encompassing the forest interior, forest edge and a belt-shaped clearing in a moist mixed pine forest habitat (Querco roboris-Pinetum) in the Kampinos Forest (Central Poland) in the context of direct and indirect human impact and the bioindicator importance of ants. Altogether, 19 ant species were found; the most abundant ones (in respect of number of nests) in the entire habitat under study were Temnothorax crassispinus (Karav.) and Myrmica rubra (L.). All analysed parameters of individual subcommunities, except for nest density (highest on the forest edge, lowest in the cleared belt), showed a gradient pattern of variability, with species richness and the index of general diversity increasing and the dominance index decreasing within the transect from the forest interior to the cleared belt. Differences between the two subcommunities from the forested area (forest interior and forest edge), both highly dominated by T. crassispinus, were, in every way, much smaller than those between either of them and the subcommunity from the cleared area, where M. rubra prevailed.
Multidirectional hypothesis of the secondary succession of fauna is considered. It contains five types of succession: creative, stabilising, rise-and-fall, regressive and restorative. The verification of these hypotheses during pine forest development is based on changes in the number of species, their abundance, the structure of the taxocoenes, actual and potential species diversity. 27 taxons (families or orders) with 1247 species occurring in Białowieża primeval pine forest served as a material for comparisons. They represent all main trophic types of the fauna: phytophages, predators, parasites and saprophages among invertebrates, and also birds and mammals. After the clear cutting of trees, no empty place appears with regard to fauna, which is the richest at this stage. The multidirectional character of the succession of fauna is predominant. Many indices decrease their values in the mature forest. Ecosystem stability is ensured by the better adapted forms while the potential diversity is not fully realised.
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