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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Influence of crop type and Agri-Environment management on the use of over-winter stubbles by farmland birds in England (2014)
Auteurs :	Jennifer A. Bright, Auteur ; Rob H. Field, Auteur ; Antony J. Morris, Auteur ; Andrew I. Cooke, Auteur ; Jeremy Fern, Auteur ; Philip V. Grice, Auteur ; Will Peach, Auteur
Type de document :	Article
Dans :	Bird Study (61(3) 2014)
Article en page(s) :	332-339
Résumé :	Capsule Bunting densities decreased in winter wheat stubbles between November/December and January/February, but not in spring barley stubbles. Aims We investigated bird use and vegetation in relation to Agri-Environment Scheme over-winter stubble type and preceding crop. Methods We surveyed 15-17 fields each of: 'standard' Agri-Environment Scheme stubble on Entry Level Stewardship farms (EF6); 'standard' Agri-Environment Scheme stubble on Higher Level Stewardship farms (HF6); stubble preceded by low-input cereal (HF15); extended over-winter stubble (EF22) and non-Agri-Environment Scheme stubble in November/December 2011 and January/February 2012. Stubbles were preceded by spring barley or winter wheat crops. Results Previous cropping and time of year were the main factors influencing bird densities: bunting densities declined in winter wheat stubbles between surveys, but not in spring barley stubbles. Conclusion The main factor limiting the ability of over-winter stubbles to reverse national population trends of farmland birds is likely to be scale of provision. However, this study suggests that selecting spring barley crops to leave as over-winter stubbles may benefit granivorous farmland birds.

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