La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Changes in the bird populations of Bavarian Swabia based on the evaluation of heterogeneous data.
Auteurs :	Hermann Stickroth, Auteur
Type de document :	Article
Dans :	Ornithologischer Anzeiger (42(3) Oktober 2003)
Article en page(s) :	213-222
Résumé :	The description of long-time changes in regional bird populations, based on the evaluation of historical to present-day data and reports, is often for methodical and statistical reasons very difficult. In this paper an example is shown (Stickroth 1993) and discussed. The results for the Landkreis Augsburg agree with other European balances of long-time changes. Short-time changes weren't evident by this database, but cross-table evaluations with independent data (Bauer 2000) show the same results with high evidence: 110 of 130 species population changes has been assessed in same way. Differences in the assessments were discussed.

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