The Structure Of The Spider Population (aranei) Of The Donetsk City Wood Plantings


E. V. Prokopenko

The studies of the species composition and structure of the spider population in the Donetsk City wood planting are given. A total of 109 species from 22 families were recorded. Linyphiidae (26,6% of total species in study sites), Lycosidae (11,1%) and Gnaphosidae (13,8%) were most species-rich. Lycosidae (55,6% individuals) were the more abundant. Linyphiidae (19,6%) occupied the second position. Gnaphosidae (4,8%) were less abundant than Thomisidae (10,8%). The high spider density and significant species richness are typical for country wood, in city parks these parameters have decreased. The maximal species richness (71 species) is recorded in suburban bairak wood (Yasinovataya Town). The minimal species richness is recorded in Lenynkiy Komsomol Park (32 species). The average spider density equal to 65,8 individuals to 100 trap-days. The maximal value of this parameter is recorded in suburban bairak wood (103,8 individuals to 100 trap-days). The minimal value of this parameter is recorded in the city parks (40,4 and 31,6 individuals to 100 trap-days in Scherbakova Park and Lenynkiy Komsomol Park respectively). The total percentage of the most abundant species (eudominants) in the parks has increased and the the total percent of the rare species has decreased. Location of the biotops in city space (on fringe, in the centre) with the spectrum of antropogenous influence has more determinative significance for the araneocomplex similarity, than generality of the origin (artificial wood, natural bairak oak forest).


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