The Hymenoptera of a dry meadow on limestone : species composition, abundance and biomass

• Autorzy: Ulrich W.
• Języki publikacji: EN

Abstrakty

EN

In 1986 and 1988 the hymenopterous fauna of a semixerophytic meadow on limestone near Gottingen (FRG) was studied using ground-photo-eclectors. A total of 4982 speciments belonging to 475 different species were collected. Extrapolations from double-log functions revealed that there may be as many as 1330 parasitoid species present per year. 455 of the 475 species were parasitoids. 155 of them attack dipterans. 48 lepidopterans, 36 beetles, 23 wasps, 22 plant hoppers and 13 aphids, 47 of the species are egg-parasitoids and parasitoids of miners, ectophytophages count for 44 of the wasp species. The abundance of the wasp fauna was rather high (1120+-53 ind. m^-2 a^-1 (1986) and335 +-42 ind. m^-2 a^-1 (1988). Most abundant were the parasitoids of miners, gall-makers and the eggparasitoids. Compared with the high abundance the biomass was low. In 1986 the wasps weighed a total of 194 +-24 mgDW m^-2 a^-1 and in 1988 only 69+-20 mgDW m^-2 a^-1. The parasitoids of ectophytophagous lepidopter ans and coleopterans counted for more than half of the whole biomass.

Słowa kluczowe

EN

biomass; density; faunal composition; Hymenoptera; local extinction; parasitoids; species numbers

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 1999
• Tom: Vol. 47, no 1
• Strony: 29--47
• Opis fizyczny: Bibliogr. 37 poz., rys., tabl.

Twórcy

autor

Ulrich W.

• Nicholas Copernicus University in Toruń Department of Animal Ecology, Gagarina 9, 87-100 Toruń: Poland

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