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Similar diversity of cereal aphid parasitoids in simple and complex landscapes.

Vollhardt, Ines M. G. and Tscharntke, Teja and Wäckers, Felix L. and Bianchi, Felix J. J. A. and Thies, Carsten (2008) Similar diversity of cereal aphid parasitoids in simple and complex landscapes. Agriculture, Ecosystems and Environment, 126 (3-4). pp. 289-292. ISSN 0167-8809

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Abstract

Structurally complex landscapes may enhance local species richness and interactions, which is possibly due to a higher species pool in complex landscapes. This hypothesis was tested using cereal aphid parasitoids (Hymenoptera, Aphidiidae) by comparing 12 winter wheat fields in structurally complex landscapes (>50% semi-natural habitats; n = 6) and structurally simple landscapes dominated by agricultural lands (>80% arable land; n = 6). Surprisingly, landscape structural complexity had no effect on aphid parasitoid species diversity. In complex landscapes 12 and in simple landscapes 11 species were found; 9 species occurred in both landscape types. Hence, arable fields in high-intensity agricultural landscapes with little non-crop area can support a similar diversity of cereal aphid parasitoids as structurally complex landscapes. This finding suggests that cereal aphid parasitoids may find necessary resources even in simple landscapes, making generalisations concerning the relationship between landscape composition and biodiversity in arable fields difficult.

Item Type: Article
Journal or Publication Title: Agriculture, Ecosystems and Environment
Uncontrolled Keywords: Biodiversity ; Parasitoids ; Winter wheat ; Biological control ; Species richness ; Landscape composition
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 28453
Deposited By: Mr Richard Ingham
Deposited On: 30 Nov 2009 14:46
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 16:47
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/28453

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