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The agricultural landscape structure in relations between spatial units (forest edge, shrubberies, field borders and roadsides), its green cover and animal communities is studied. The share of parasitoid Hymenoptera of the Pimplinae subfamily in structural elements of agricultural landscape is presented. The relationships between species diversity and the abundance of Pimplinae communities and the complexity level of agricultural landscape are considered. For examining these dependences, multivariate statistical analysis, eg. principal component analysis is used.
The research was carried out in the years 1991–1994 in agricultural landscape of medium mosaic degree in the area of Łęczyca. It covered parasitoids of the Pimplinae subfamily (Hymenoptera, Ichneumonidae), inhabiting refugium habitats such as shrubberies, field borders, roadsides and forest edges. The method used was scooping in order to catch imagos. 48 species were found, which made up 36.1% of this subfamily’s domestic fauna and 63.1% of those reported for Wielkopolska. Dominant species were Endromopoda detrita (Holmgr.) (D = 19.5%), Itoplectis maculator (F.) (D = 11.5%), I. alternans (Grav.) (D = 11.3%), Pimpla contemplator (Muell.) (D = 9.2%) and Zaglyptus multicolor (Grav.) (D = 7.1%). The greatest species diversity was reported from the forest edge (34 species), while the highest number was found in the shrubberies (268 individuals). The greatest stability of species composition was found in the shrubbery communities. The greatest species similarity between communities was reported for the shrubberies and the forest edge (SM = 53.5%). The highest similarity in terms of quantity occurred between the groups on the field border and road edge (Re = 64.5%).
Investigations were carried out in various habitats of an agricultural landscape of Poznań environs in 1997. Thirty five species of Pimplinae and one species of Diacritinae were recorded. For each species trophic relations, period of appearance of adults and spatial distribution over the investigated areas are given.
The studies were carried out in various habilitas in the Biebrza Valley Lower Basin in 1982-83. Fifty nine species of Pimplinae were recorded. For each species trophic relation, period of appearance of adults and spatial distribution over investigated areas are given.
Plant communities which form orchard edges are a vital element of ecological infrastructure enriching these agrocenoses. The research was conducted in an orchard environment made up of apple orchards and their edges in the form of agricultural cultivations, tree clumps and a road lined with trees and shrubberies. The study aim was to determine the impact of the orchard edge plant diversity onto the number and abundance of Ichneumonidae subfamilies in the orchards. The study showed that orchard environments made up of an apple orchard and edge plants of various species create better living conditions for Ichneumonidae parasitoids than the environment of an orchard and neighbouring agricultural cultivations. The diversity of orchard edge plants positively influences the abundance of the Ichneumonidae subfamilies rather than the number of subfamilies in the orchard. In the orchard habitat the following dominant subfamilies were found: Campopleginae, Cryptinae, Orthocentrinae and Pimplinae. These entomophages may control the abundance of pests infesting orchards.
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