Details

Autor(en) / Beteiligte

• Trąba, Czesława
• Wolański, Paweł
• Oklejewicz, Krzysztof

Titel

Communities with Brachypodium pinnatum and Bromus erectus in the Wiar and the San valleys

Ist Teil von

• Annales Universitatis Mariae Curie-Skłodowska. Sectio C. Biologia, 2012-01, Vol.67 (1), p.70-92

Ort / Verlag

Lublin: Versita

Erscheinungsjahr

2012

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Communities with [Brachypodium pinnatum] and [Bromus erectus] in the Wiar and the San valleys The aim of this paper was analyzing the floristic composition of xerothermic grasslands of the class of [Festuco-Brometea] in the San valley (mountain and submountain part) and Wiar valley. We also indicated the threats for these interesting ecosystems. Based on 37 phytosociological relevés two communities were distinguished: one with [Brachypodium pinnatum] and the other with [Bromus erectus]. Selected soil chemical properties were analyzed. We calculated climatic (L, T, K) and edaphic indices (F, R, N) using Ellenberg's phytoindication method. Plant communities were distinguished with the use of the Profit II computer program. Species diveristy was expressed in the Shanon-Wiener's index. The community with [Brachypodium pinnatum] was identified in various soil and topography conditions, whereas the community with [Bromus erectus] occurred mainly in flat areas, on fluvisols with a large proportion of skeletal fractions. Trophic properties of soils of both communities were similar, except for pH which was higher in the community with [Brachypodium pinnatum] than in the community with [Bromus erectus]. The level of insolation and trophic site conditions, estimated by the phytoindication method, were more advantageous in the community with [Bromus erectus] than in the community with [Brachypodium pinnatum]. The continentality index indicates suboceanic character of both communities. The proportion of xerothermic species, characteristic of the classes [Festuco-Brometea] and [Trifolio-Geranietea sanguinei], was higher in the community with [Brachypodium pinnatum], both in the species composition and the cover of the area. On the other hand, the proportion of meadow species, characteristic of the class [Molinio-Arrhenatheretea], was higher in the community with [Bromus erectus]. Shanon-Wiener's index of species diversity was higher in the community with [Brachypodium pinnatum] than in the community with [Bromus erectus]. The higher number of rare and protected species was found in the community with [Brachypodium pinnatum]. From the point of view of biological conservation the community with [Brachypodium pinnatum] is more valuable in the study area. Biodiversity of both communities is endangered by the lack of pasturing and mowing, therefore, it is essential to provide these areas with active protection, e.g. within agro-environmental schemes.