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Farming system and landscape complexity affects pollinators and predatory insect communities differently
Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, The Institute of Technology.
2014 (English)Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
Abstract [en]

It has been argued that organic farming sustains a higher biodiversity than conventional farming. This might promote the ecosystem services that exist in agricultural landscapes such as pollination and pest control. Here, I examined the effect of farming system (organic vs. conventional) with respect to the time since farming system transition, landscape heterogeneity and plant richness on pollinating and predatory insects. In total, data from 30 farms were used, of which 20 were organic and 10 were conventional. The data were analyzed using general linear models and model averaging. The results show that insect groups responded differently to various factors. Pollinators were more sensitive to landscape complexity, showing an increase of abundance and species richness with an increased heterogeneity. Predators on the other hand reacted to farming system, where there was an increase in abundance and species richness on organic farms.

Place, publisher, year, edition, pages
2014. , 15 p.
Keyword [en]
Organic farming, agricultural intensification, landscape heterogeneity, time since transition, bumblebees, solitary bees, hoverflies, natural enemies
National Category
Biological Sciences
URN: urn:nbn:se:liu:diva-110051ISRN: LiTH-IFM- Ex--14/2872--SEOAI: diva2:742519
Subject / course
Available from: 2014-09-05 Created: 2014-09-01 Last updated: 2014-09-05Bibliographically approved

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