La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Birds and habitat change in Britain Part I: a review of losses and gains in the twentieth century
Auteurs :	Robert J. Fuller, Auteur ; Malcolm Ausden, Auteur
Type de document :	Article
Dans :	British Birds (101(12) DEC 2008)
Article en page(s) :	644-675
Résumé :	We identify 18 trends in habitat quantity or quality considered to be important drivers of change in bird populations in the twentieth century. The trends are grouped into changes in (i) farmland (including the uplands), (ii) woodland/forestry, (iii) coastal and inland wetlands and (iv) miscellaneous (urbanisation and recreation). Shifts in habitat quality were just as significant to birds as changes in habitat extent. Many of the trends had complex effects on birds, benefiting some species but creating pressures for others. Overall, habitat changes in lowland and upland farmed landscapes have been detrimental to birds. Expansion of conifer plantations had mixed effects, replacing long-established bird communities with new ones. The decline in coppicing and recent changes in lowland woodland structure caused several species to lose habitat but few have gained. Two striking changes affecting wetland birds have been the modernisation of sewage treatment systems and the increase in man-made waterbodies. Eight habitat-related issues are identified that are likely to be especially significant to birds in the first half of the twenty-first century.

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