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Quantifying turnover in biodiversity of British breeding birds [Journal of Applied Ecology]

Keywords : biodiversity, Breeding Bird Survey, climate change, farmland bird community, species proportions, turnover, woodland bird community

par Frédéric Magné - publié le

1.A key aspect of monitoring regional changes in biodiversity is to quantify the temporal turnover in communities. Turnover has traditionally been assessed by observing range change. However, we are often interested in trends in biodiversity of large regions as opposed to single sites, as with Convention for Biological Diversity targets. Extinctions and colonizations tend to be rare events at the regional level ; changes in species proportions estimated from spatio-temporal models of species abundance are then more sensitive measures of community change.
2.We investigated three measures for quantifying turnover based on species proportions, and estimated how each varies across Great Britain using data from the British Trust for Ornithology’s Breeding Bird Survey.(...)

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