Ábrahám Levente (szerk.): Válogatott tanulmányok VII. - Natura Somogyiensis 22. (Kaposvár, 2012)

Winkler D. - Traser Gy. N.: Eco-faunistic study on the Collembola fauna in the Vasvár-Nagymákfa area (Őrség, Western Hungary)

Winkler, D. & Traser, Gy. N.: Study on the Collembola fauna 49 can probably be explained with the presence of the huge amount of decaying plant mat­ter washed down by the river Csömöc to the bank sediment, offering optimal environ­ment for the mass occurrence of surface dwelling and hemiedaphic Collembola species such as Isotomiella minor or Folsomia quadrioculata. The latter species is especially known for its colonisation ability. The values of the community dominance index (CDI) and the species rank abundance curves (Fig. 16) well emphasise the differences between the dominance structures of Collembola communities found in the sampled habitats. The dominance index was the lowest (~47%) in the beech forest indicating a relatively balanced dominance structure. The most dominant species was Folsomia penicula, a rather silvicolous, mesophil spe­cies occurring with an average of 60 spec./100 cm3 abundance. Subdominant species were Isotomiella minor and Xenylla boerneri. The dominance indices of the communi­ties in the lowland oak-ash-elm forest and in the mesotrophic wet meadow were about the same (~60%). In both communities, the eudominant species appeared to be Isotomiella minor, while the second dominant species came from the genus Protaphorura (P. cancellata in the oak-ash-elm forest and P. armata in the wet meadow). The highest dominance index was obtained in the community found in the tall herb fen meadow. The dominance structure is therefore unbalanced and the equitability is very low mainly because of the already mentioned mass occurrence of Isotomiella minor and Folsomia quadrioculata. The agglomerative cluster analysis based on two measures of similarity, the Jaccard’s single linear index and the Bray-Curtis index, resulted in two different dendrograms Fig. 16: Rank abundance curves (log series) of Collembola communities of the studied habitats

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