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Biodiversity and biological control

effects of agricultural intensity at the farm and landscape scale

Winqvist, Camilla (2011). Biodiversity and biological control. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2011:40
ISBN 978-91-576-7584-2
[Doctoral thesis]

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Agricultural intensity on the local field or farm scale and on the regional landscape scale affects the organisms utilizing the arable landscape, and may affect ecosystem
services and functions.

This thesis examines how plants, birds, community composition of ground beetles, and biological control of cereal aphids are affected by local agricultural intensity, organic farming and the surrounding landscape in Sweden and across Europe. The contribution of naturally occurring predator groups to the control of
cereal aphid populations in complex and simple arable landscapes is also examined.

Overall, an increase in yield or pesticide use decreased species richness of all
studied organisms, and reduced the biological control potential. Organic farming was beneficial to plants, whereas the effect on ground beetles and birds differed
between studies. Organic farming enhanced biological control potential in heterogeneous landscapes only. On conventional farms the biological control was similarly high in all landscapes. Plants and birds were more abundant and species rich in heterogeneous landscapes, whereas ground beetles, especially omnivores, were more abundant in homogeneous landscapes. Ground-dwelling and flying
predators reduced both the density and population growth rate of cereal aphids.

This thesis will improve the understanding of effects of agricultural intensity on biodiversity and biological control of cereal aphids across Europe. Although results
vary among taxa and trait groups, they show that a shift towards farming with minimal pesticide use over large areas would affect biodiversity positively. The thesis also shows that naturally occurring predators are able to suppress cereal aphids and thereby reduce the need for insecticide applications. Finally, local management and landscape complexity need to be considered when developing future agri-environment schemes.

Authors/Creators:Winqvist, Camilla
Title:Biodiversity and biological control
Subtitle:effects of agricultural intensity at the farm and landscape scale
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :May 2011
Number of Pages:56
I.Geiger, F., Bengtsson, J., Berendse F., Weisser, W.W., Emmerson, M., Morales, M.B., Ceryngier, P., Liira, J., Tscharntke, T., Winqvist, C., Eggers, S., Bommarco, R., Pärt, T., Bretagnolle, V., Plantegenest, M., Clement, L.W., Dennis, C., Palmer, C., Oñate, J.J., Guerrero, I., Hawro, V., Aavik, T., Thies, C., Flohre, A., Hänke, S., Fischer, C., Goedhart, P.W., and Inchausti, P. (2010) Persistent negative effects of pesticides on biodiversity and biological control potential on European farmland. Basic and Applied Ecology, 11, 97-105.
II.Winqvist, C., Bengtsson, J., Aavik, T., Berendse, F., Clement, L.W., Eggers, S., Fischer, C., Flohre, A., Geiger, F., Liira, J., Pärt, T., Thies, C., Tscharntke, T., Weisser, W.W. and Bommarco, R. (2011) Mixed effects of organic farming and landscape complexity on farmland biodiversity and biocontrol potential. Journal of Applied Ecology, DOI: 10.1111/j.1365- 2664.2010.01950.x
III.Winqvist, C., Bengtsson, J., Öckinger, E., Aavik, T., Berendse, F., Clement, L.W., Fischer, C., Flohre, A., Geiger, F., Liira, J., Thies, C., Tscharntke, T., Weisser, W.W. and Bommarco, R. Traits influence ground beetle responses to farm and landscape level agricultural intensification across Europe (manuscript).
IV.Winqvist, C., Bommarco, R. and Bengtsson, J. Flying and grounddwelling natural enemies provide effective biological control of cereal aphids across landscapes (manuscript).
Place of Publication:Uppsala
Publisher:Institutionen för ekologi, Sveriges lantbruksuniversitet
ISBN for printed version:978-91-576-7584-2
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:H Protection of plants and stored products > H01 Protection of plants - General aspects
P Natural resources > P01 Nature conservation and land resources
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Agrovoc terms:biodiversity, farmland, land use, intensive farming, organic agriculture, pesticides, cereal crops, aphidoidea, biological control, birds, coleoptera, predators
Keywords:Aphids, Birds, Ground beetles, Landscape complexity, Natural enemies, Organic farming, Pesticides, Plants, Traits, Yield
Permanent URL:
ID Code:8114
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: Camilla Winqvist
Deposited On:06 May 2011 08:27
Metadata Last Modified:02 Dec 2014 10:46

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