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Landscape-scale crop diversity interacts with local management to determine ground beetle diversity

Author:
  • Erkki Palmu
  • Johan Ekroos
  • Helena Hanson
  • Henrik Smith
  • Katarina Hedlund
Publishing year: 2014
Language: English
Pages: 241-249
Publication/Series: Basic and Applied Ecology
Volume: 15
Issue: 3
Document type: Journal article
Publisher: Elsevier

Abstract english

Crop diversification and maintenance of semi-natural habitats (grasslands and field boundaries) are suggested to enhance farmland biodiversity, but the relative importance of these factors remains poorly known. We evaluated how crop diversity and availability of semi-natural grasslands at a landscape-scale interacted with local farming management (three management types from low to high intensity: ley < winter wheat < sugar beet) in their effect on ground beetle assemblages in southern Sweden. Ground beetle diversity increased with crop diversity either independently of local management (Simpson species diversity), or only in the less intensively managed habitats (rarefied species richness). While ground beetle diversity in leys tended to increase with field boundary length, no such relationship was observed in winter wheat or sugar beet fields. In contrast, the landscape proportions of leys and semi-natural grasslands did not affect ground beetle species richness and diversity. We conclude that (a) semi-natural grasslands and leys may not function as source habitats at a landscape-scale if they comprise a low proportion of the total land-use, while (b) increasing crop diversity is correlated to ground beetle richness and diversity in agricultural landscapes dominated by arable land. The beneficial effect of landscape-scale crop diversification on farmland biodiversity may depend on the general level of agricultural intensity of a region.

Keywords

  • Ecology
  • Earth and Related Environmental Sciences
  • Agricultural landscapes
  • Agricultural management
  • Carabidae
  • Crop
  • diversification
  • Landscape heterogeneity
  • Species diversity
  • Species
  • richness
  • Trophic groups

Other

Published
  • BECC
  • ISSN: 1618-0089
Henrik Smith
E-mail: henrik [dot] smith [at] biol [dot] lu [dot] se

Professor

Biodiversity

+46 46 222 93 79

+46 70 978 20 56

E-C313

50

Director

Centre for Environmental and Climate Research (CEC)

+46 46 222 93 79

+46 70 978 20 56

C313

Sölvegatan 37, Lund

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Centre for Animal Movement Research
Evolutionary Ecology, Department of Biology
Ecology building S-223 62 Lund Sweden