Fauna and seasonal dynamics of activity of ground beetles on the berry plantations of Siberian Botanical Garden experimental. Plot. 2. Fauna and seasonal dynamics of activity of rove beetles (Coleoptera: Staphylinidae)

The peculiarities of fauna and seasonal dynamics of activity of rove beetles (Coleoptera, Staphylinidae) on the berry plantations and surrounding ecosystems of Siberian Botanical Garden (SBG) experimental plot nearby Tomsk have been shown. Rove beetles have been collected with the help of Barber pitfall trap on the territories of black-currant and strawberry plantation, in birch and poplar forests. There are 29 species of ground beetles on the territory under study, and Drusilla canaliculata F. is the dominant species on each site under study. Approximately half of all rove beetles from the pitfall traps belong to D. сanaliculata, and its proportion in different ecosystems varies from 28.60 to 40.33%. Other dominant species (Xantho-linus tricolor F. and Philonthus decorus Grav.) significantly come short of activity in comparison with D. сanaliculata. The proportion of X. tricolor is relatively high on the strawberry plantation (26.65%) and in the poplar forest (24.66%), but the activity of P. decorus is relatively higher in wetter habitats - in the birch forest (18.80%) and on the black-currant plantation (16.30%). The diversity of rove beetles on all the territories under study is relatively low: there are 16 species on the black-currant site, 16 - in the poplar forest, 18 - in the birch forest, and only 11 species on the strawberry plantation. On the berry plantations the activity of rove beetles is supported by the three dominant species: P. decorus, D. сanaliculata andX. tricolor. The activity of beetles was low on the strawberry site during the whole period of study, and staphylinids significantly come short of activity in comparison with carabids beetles in the first part of summer. The activity of rove beetles on the black-currant plantation was significantly high compared to strawberry plantations and there was one peak of activity here at the beginning of August (due to activity of D. сanaliculata and X. tricolor). The activity of rove beetles on forest territories was significantly high in comparison with the berry habitats. In the birch forest staphylinids' activity increases gradually during June, explosive growth of their activity is observed at the beginning of July, and explosive decrease in their activity is observed up to the end of July. In the poplar forest during the first part of summer activity of beetles was low, but explosive growth (due to activity of D. сanaliculata) was in the first part of August. There are some similarities and differences between seasonal dynamic activity of Carabidae and Staphylinidae beetles in the forests and berry plantations. Obviously, the representatives of both families prefer the same micro-climate conditions, but often they have different place of wintering and locomotion possibilities. Most rove beetles are active in summer in the place of wintering, but ground beetles often migrate from forests towards berry plantations.

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