Abrashitov F.L.1, Azarkina G.N.2, Dudko R.Yu.2, Lyubechanskii I.I.2 2019. [Soil-dwelling predatory arthropod community: carabid beetles (Insecta: Carabidae) and spiders (Arachnida: Araneae) in the South-West Siberia forest-steppe ecosystems on the abandoned crop fields affected by water erosion] // Euroasian Entomological Journal. Vol.18. No.6: 426–436 [in Russian, with English summary].

1 Faculty of Natural Sciences, Novosibirsk State University, Pirogova Str. 2, Novosibirsk 630090 Russia. E-mail: fabrashitov@yandex.ru

2 Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Frunze Str. 11, Novosibirsk 630091 Russia. E-mail: urmakuz@gmail.com, rdudko@mail.ru, lubech@gmail.com

doi: 10.15298/euroasentj.18.6.11

ABSTRACT. The fauna of ground-dwelling carabid beetles and spiders was studied in four sites of the forest-steppe in the southeast of the Novosibirsk Region: an eroded 16-year-old deposit, an uncultivated meadow slope, and two sections of a small river floodplain, which are accumulative positions of catenas to the first two sections. Communities of river-bench landscapes include mainly zoophagous carabids and vegetation-inhabiting spiders, mostly belonging to the Linyphiidae family. In slope areas, the diversity of predatory carabids and chortobiontic spiders is decreasing, but the number of species of myxophytophagous Carabidae and terrestrial spiders is increasing. Species composition of the eroded slope site includes species with a subarid type of geographic range. In the eroded area, the abundance and biomass of phytophagous ground beetles of the genera Amara and Harpalus are much higher. The dynamic density of spiders and mixophytophagous carabids on the instant site is characterized by a spring peak, and in the eroded one - by a summer peak.

KEY WORDS: ground beetles, Carabidae, spiders, Araneae, soil erosion, agricultural deposits, Western Siberia, Novosibirsk region.

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