Skip to Main content Skip to Navigation
Journal articles

Reconsidering the role of ‘semi-natural habitat’ in agricultural landscape biodiversity: a case study

Abstract : Semi-natural habitats are considered as the main source of biodiversity in agricultural landscapes. Most landscape ecology research has focused on the amount (relative surface) and spatial organisation of these habitats. However, these two components of landscape heterogeneity, composition and configuration, are often correlated. Also, landscape structure effects on biodiversity were mostly observed locally, while there is a great need for studying landscape-scale gamma diversity. We conducted a mensurative experiment to determine the independent effects of semi-natural habitat amount and configuration on gamma diversity of carabid beetles and vascular plants. The influence of landscape heterogeneity components were tested on species richness, evenness and composition. Local diversity (species richness and composition) was compared across the various cover types to determine their relative contributions. Only carabid species evenness and composition were influenced by seminatural habitat amount. Carabid and plant species richness and plant species composition remained unaffected by semi-natural habitats. Local diversity analysis showed that three types of habitats can be distinguished in agricultural landscapes: grasslands (temporary and permanent ones), woody habitats (woodlands and hedgerows) and row crops. These results beg for a re-evaluation of the semi-natural covers. Temporary and permanent grasslands are often similar, probably because of comparable farming management. Permanent grasslands and woody habitats are often combined as semi-natural covers, although they support very different communities. The lack of effect of semi-natural habitat amount and configuration on gamma diversity results from a more complex organisation of biodiversity in landscapes and supports the move from semi-natural vs. farmland to habitat mosaic landscape representations.
Document type :
Journal articles
Complete list of metadatas

Cited literature [14 references]  Display  Hide  Download

https://hal-univ-rennes1.archives-ouvertes.fr/hal-01120722
Contributor : Valerie Briand <>
Submitted on : Thursday, February 26, 2015 - 2:14:43 PM
Last modification on : Friday, October 23, 2020 - 5:04:57 PM
Long-term archiving on: : Wednesday, May 27, 2015 - 12:02:11 PM

File

Duflot et al 2015 Ecol Res.pdf
Files produced by the author(s)

Identifiers

Citation

Rémi Duflot, Stéphanie Aviron, Aude Ernoult, Lenore Fahrig, Francoise Burel. Reconsidering the role of ‘semi-natural habitat’ in agricultural landscape biodiversity: a case study. Ecological Research, Ecological Society of Japan, 2015, 30 (1), pp.75-83. ⟨10.1007/s11284-014-1211-9⟩. ⟨hal-01120722⟩

Share

Metrics

Record views

574

Files downloads

1315