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The contribution of CAP greening measures to conservation biological control at two spatial scales

Birkhofer, Klaus LU ; Fevrier, Valentin; Heinrich, Anna Eva; Rink, Katharina and Smith, Henrik G. LU (2018) In Agriculture, Ecosystems and Environment 255. p.84-94
Abstract

To promote a more sustainable agricultural production, the European Commission implemented direct payments that require farmers to implement greening measures aimed at reducing negative effects of agriculture on the environment and biodiversity. These greening measures (including fallows and permanent grasslands) have been criticised for their potential inability to conserve biodiversity and promote associated ecosystem services. In this study, we investigate if the presence of old or recently established fallows and permanent grassland in the landscape are beneficial for the emergence, activity density and spillover of ground-running natural enemies and as a result aphid biological control in cereal fields. Lycosidae and Theridiidae... (More)

To promote a more sustainable agricultural production, the European Commission implemented direct payments that require farmers to implement greening measures aimed at reducing negative effects of agriculture on the environment and biodiversity. These greening measures (including fallows and permanent grasslands) have been criticised for their potential inability to conserve biodiversity and promote associated ecosystem services. In this study, we investigate if the presence of old or recently established fallows and permanent grassland in the landscape are beneficial for the emergence, activity density and spillover of ground-running natural enemies and as a result aphid biological control in cereal fields. Lycosidae and Theridiidae were more numerous in fallows (emergence & activity density) compared to crop fields, while Staphylinidae and Linyphiidae showed opposite patterns. Spillover of Lycosidae was significantly higher from fallows into cereal fields, than between cereal fields. As a result of the opposite patterns in activity density in fallows between different groups of predators, a spillover from fallows did not result in a significantly higher aphid control in crop fields adjacent to them. A high proportion of permanent grassland in the landscape resulted in lower emergence of Linyphiidae and Carabidae. Our results support the assumption that a higher emergence and activity density of ground-running predators generally results in higher spillover to adjacent fields. However, patterns of emergence and activity density differed between individual natural enemy groups. Fallows, independent of age, can therefore act as source or sink depending on the focal predator group and more permanent grassland in the landscape can result in lower local emergence. Fallows at the local scale and permanent grassland at larger spatial scales therefore did not generally promote aphid biological control services provided by ground-running natural enemies.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Emergence, Fallow, Generalist predators, Permanent grassland, Set-aside, Spillover
in
Agriculture, Ecosystems and Environment
volume
255
pages
11 pages
publisher
Elsevier
external identifiers
  • scopus:85044263439
ISSN
0167-8809
DOI
10.1016/j.agee.2017.12.026
language
English
LU publication?
yes
id
69352f1e-63da-4451-ba48-9e2a2c03a3bc
date added to LUP
2018-04-05 14:44:26
date last changed
2018-10-03 11:30:18
@article{69352f1e-63da-4451-ba48-9e2a2c03a3bc,
  abstract     = {<p>To promote a more sustainable agricultural production, the European Commission implemented direct payments that require farmers to implement greening measures aimed at reducing negative effects of agriculture on the environment and biodiversity. These greening measures (including fallows and permanent grasslands) have been criticised for their potential inability to conserve biodiversity and promote associated ecosystem services. In this study, we investigate if the presence of old or recently established fallows and permanent grassland in the landscape are beneficial for the emergence, activity density and spillover of ground-running natural enemies and as a result aphid biological control in cereal fields. Lycosidae and Theridiidae were more numerous in fallows (emergence &amp; activity density) compared to crop fields, while Staphylinidae and Linyphiidae showed opposite patterns. Spillover of Lycosidae was significantly higher from fallows into cereal fields, than between cereal fields. As a result of the opposite patterns in activity density in fallows between different groups of predators, a spillover from fallows did not result in a significantly higher aphid control in crop fields adjacent to them. A high proportion of permanent grassland in the landscape resulted in lower emergence of Linyphiidae and Carabidae. Our results support the assumption that a higher emergence and activity density of ground-running predators generally results in higher spillover to adjacent fields. However, patterns of emergence and activity density differed between individual natural enemy groups. Fallows, independent of age, can therefore act as source or sink depending on the focal predator group and more permanent grassland in the landscape can result in lower local emergence. Fallows at the local scale and permanent grassland at larger spatial scales therefore did not generally promote aphid biological control services provided by ground-running natural enemies.</p>},
  author       = {Birkhofer, Klaus and Fevrier, Valentin and Heinrich, Anna Eva and Rink, Katharina and Smith, Henrik G.},
  issn         = {0167-8809},
  keyword      = {Emergence,Fallow,Generalist predators,Permanent grassland,Set-aside,Spillover},
  language     = {eng},
  month        = {03},
  pages        = {84--94},
  publisher    = {Elsevier},
  series       = {Agriculture, Ecosystems and Environment},
  title        = {The contribution of CAP greening measures to conservation biological control at two spatial scales},
  url          = {http://dx.doi.org/10.1016/j.agee.2017.12.026},
  volume       = {255},
  year         = {2018},
}