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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Population size and trend of the Nuddle Spotted Woodpecker Picoides medius in Germany and its importance for forest nature conservation.
Auteurs :	Peter Suedbeck, Auteur ; Martin Flade, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (125(3-4) 2004)
Article en page(s) :	319-326
Résumé :	During the past 20 years, the Middle Spotted Woodpecker as an excellent indicator species for the conservation status of mature deciduous,forests experienced an increasing interest of ornithological research. This paper summarises the current knowledge on population sizes and trends, habitat selection and abundance of the species in Germany and draws conclusions for forest nature conservation. In some federal states, during recent years detailed surveys have been performed. The resulting population estimates are distinctly (up to four times) higher than previous estimates from the late 1990s. In Table 1, an overview of the results of a questionnaire which was send to the responsible administrations and ornithological societies of all federal states is given. The total German population is actually estimated at 16,500-22,000 bp., with largest numbers in Hesse, Lower Saxony, Baden-Wurttemberg, Bavaria, and Brandenburg. Although this higher population numbers are mainly due to intensified surveys, there is evidence (e.g. from the German Common Birds Census),for A.,distinct increase of the species especially in western and northern Germany - as it is also observed in the Benelux and Baltic countries. Furthermore, studies on occurrence, abundance and to. raging habitats in different forest types revealed that the species does not only occur in (mixed) oak forests, but also in pure beech and alder forests, so far they show a high proportion of mature trees and standing dead wood. This means also, that today the Middle Spotted Woodpecker occurs only in a very small part of its former natural range in Germany, and that the actual, populations have a relict character. The future population development of the species is regarded as an important indicator for the ecological sustainability of forestry management in Germany.

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