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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Short Rotation Coppiced (SRC) biomass willow as a habitat for breeding birds in a Danish farmland landscape)
Auteurs :	Jens Reddersen, Auteur ; Ib Krag Petersen, Auteur
Type de document :	Article
Dans :	Dansk Ornitologisk Forenings Tidsskrift (98(1) 2004)
Article en page(s) :	21-32
Langues:	Anglais
Résumé :	In the spring and summer of 1998, the value of SRC willow plantations as habitat for breeding birds was investigated in a 147 ha mixed, typical Danish farmland study area which included eight commercial SRC willow plots in various stages of regrowth after harvest (0.1- 1.7 ha). Territory densities, species composition, species richness and species similarity were compared across six major biotope categories: (rotational) Field, (grass) Set-aside, (various types of) Meadow/Fen. Deciduous wood, SRC willow and (small fragments of) Coniferous wood. Breeding bird territory maps were constructed by standardized evaluation of detailed field-visit maps showing positions of various breeding activities at each of ten visits. Six functional species groups based on 'breeding bird habitat preference' were defined, allowing the pooling of species data in an effort to gain statistical power. This grouping was based on information from the literature and therefore strictly independent of our data. The total material comprised 363 breeding territories of 49 bird species. In almost all respects, such as total and species-group territory densities and species richness, SRC willow attained an intermediate position, with far less birds than both Deciduous and Coniferous wood but with similar bird densities as Meadow/Fen, and usually with more birds than Set-aside and Fields. While other biotope categories often hosted a very characteristic species composition. met. birds unique for that biotope type, SRC willow hosted a mixture of birds from both mosaic farmland, open land and moist non-forest biotopes; true forest species, however, were absent. The results are discussed in relation to variation in SRC willow management, including recommended modifications of management for increasing the habitat value of SRC willow for birds.

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