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HOLUSA, O.: Structure and diversity of psocid taxocenoses (Insecta: Psocoptera) in the forest ecosystems of the Fageta abietis s. lat. zone in the Western Carpathian Mts. Acta univ. agric. et silvic. Mendel. Brun., 2012, LX, No. 3, pp. 51–60 Structure of psocid taxocenoses (Psocoptera) were studied in forest ecosystems of the Western Carpathian Mts. during 1997–2001. Vegetation tiers were used as a study frame. Lower units of forest site classifi cation system (forest type complexes) were used for a classifi cation of ecological conditions as well. Only a part of material, i.e. individuals that was found in the forest ecosystems of Fageta abietis s. lat. communities (= the 4th beech vegetation tier) was evaluated for purpose of this work. This vegetation tier is widespread in large part of Vsetinske vrchy hills, in the highest parts of Podbeskydska pahorkatina hills, and in the foothills of the Moravskoslezske Beskydy Mts. 1774 adults comprising 32 species were found in total in the 4th vegetation tier. As eudominant species, the following ones were found: Caecilius fl avidus and C. burmeisteri, as dominant species, the following ones were found: Philotarsus picicornis, Elipsocus moebiusi and Peripsocus subfasciatus. In natural geobiocenoses with the level of naturalness of 1 or 2, the following species were found: as eudominant species: Caecilius fl avidus and Elipsocus moebiusi, as dominant species, the following one was found: Mesopsocus unipunctatum. Taxocenoses of psocids were evaluated by Detrended Correspondence analysis (DCA) and Divisive Cluster analysis (DvClA). This material was compared to another material gained from various vegetation tiers in the Western Carpathians Mts. The characteristic species composition of psocids in the 4th vegetation tier was as follows: Caecilius fl avidus – Elipsocus moebiusi – Peripsocus parvulus. Psocoptera, taxocenoses, diversity, forest ecosystems, vegetation tier – Fageta abietis s. lat., the Moravskoslezske Beskydy Mts., the Western Carpathian Mts. Order Psocoptera has not been in focus of faunistic or ecological studies. Complex psocopterological research was initiated recently by author in a territory of the Czech Republic and Slovakia in 1997. The aim of the systematic study of psocids conducted in the Western Carpathian Mts. was to defi ne the species diversity and characteristic species composition of psocids in particular vegetation tiers (= altitudinal vegetation zone, further only VT) and to prove an applicability of vegetation zones or lower units of geobiocenological or forest + site classifi cation systems in zoocenological studies. HOLUSA (2001, 2003a, b, 2007b, c) published studies at ecological problem of psocid taxocenoses composition dependence on VTs in the Moravskoslezske Beskydy Mts., in the Podbeskydska pahorkatina hills (HOLUSA, 2005) and in the alluvium of the Odra river (the Protected landscape area of Poodři) (HOLUSA, 2007a). The aim of presented article is to analyse composition and diversity of psocid taxocenoses of the 4th VT (Fageta abietis s. lat.) i.e. and to discuss the diff erences with other known VTs i.e. the 5th (Abieti– fageta s. lat.) (HOLUSA, 2009), the 6th (Picei–fageta s. lat.) (HOLUSA, 2011), the 7th (Fageti–piceeta s. lat.) and the 8th (Piceeta s. lat.) VTs (HOLUSA, 2007c). The aim of this study is the using of frames and units of forest site classifi cation system (according

acta universitatis agriculturae et silviculturae mendelianae brunensis

Structure and diversity of psocid taxocenoses (Insecta: Psocoptera) in the forest ecosystems of the Fageta abietis s. lat. zone in the Western Carpathian Mts.