Abstract

Abstract Bird community structure and dynamics were studied in seven habitats of northern Italy during three periods. Respectively 87 and 70 species were detected in 1984 and 1985 (a total of 98 species for 1984 + 1985). Of these, 45% belonged to permanent resident species. This category was dominant in abandoned mountain farmland, shrublands, young wood and abandoned chestnut orchard. The tree cover was negatively correlated with bird diversity. The permanent resident and transient migrant species had the highest interseason turnover. Abandoned chestnut orchard showed the highest value of specific dominance (322). The species with the widest habitat breadth (> 0.80) were: blackcap (Sylvia atricapilla), blackbird (Turdus merula), great tit (Parus major) and greenfinch (Carduelis choris). Based on the relative abundance of single species abandoned chestnut orchards, shrubland and young wood were the habitats with the most similar bird community. Seven species had an acoustic repertoire breadth > 0.60. The ...

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