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Résumé :
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In DOFT 107: 281-290, 2013 the three first authors (LD, TSR and MBG) presented a paper on development in the numbers of species of Danish breeding birds 1800-2012 (Romdal et aL 2013). Information published subsequently on Danish breeding birds made a re-analysis of the extended dataset relevant, and resulted in new categorization for eight species. The new results confirmed that numbers of breeding bird species in Den-mark increased significantly from 149 in 1800 to 178 in 2012. Split into habitat types, the new results showed a continued increase in numbers of species in forest and wetland habitats in recent years. The largest decline in species numbers occurred within the group heathland/meadow/commons. The general stagnation in species richness reported in the last 20 years by Romdal et aL (2013) was not supported. The number of non persecuted species, however, did show a statistically significant decline in the last 20 years. By contrast, the species categorized as (previously) persecuted increased significantly in the revised analysis over the last 20 years - indicating a comeback from an all-time low around 1900. Enhanced legal protection, landscape change, nature management and a change in mindset among the general public are believed to be some of the major drivers contributing to the long term increase in Danish bird species richness.
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