| Titre : | Comparative investigation of territories of the middle spotted woodpecker Dendrocopos medius in the forest area "Nordlicher Feilenforst" |
| Auteurs : | Tobias Zehetmair, Auteur |
| Type de document : | Article |
| Dans : | Ornithologischer Anzeiger (48(2) OCT 2009) |
| Article en page(s) : | 97-110 |
| Résumé : | In spring 2007, forest inventory parameters were investigated in territories of the middle spotted woodpecker Dendrocopos medius in the northern part of the forest area "Feilenforst" near Ingolstadt, Bavaria. For the evaluation the breeding territories - which were mapped each year from 2001 to 2005 - were divided into the categories "permanently occupied " (KAT 3) and "irregularly occupied" (KAT 2). In addition "control areas" (KAT 1) were examined, in which breeding of middle spotted woodpecker was never recorded. Altogether, 168 randomly selected sample plots of each 1000 m(2) were examined, spread over the 24 territories and the control areas. Data were analyzed with different statistic methods for strength of influence on middle spotted woodpecker frequency. The results show that the occurrence of the middle spotted woodpecker depends not only oil the presence of oaks Quercus robur but significantly on the quantity of hardwood surface area, especially of rough-barked deciduous tree species. Tree species composition played only a subordinate role. Moreover, the positive influence of lime trees Tilia spec. was shown, a tree generally considered to be less important for the middle spotted woodpecker. Finally a list of proposals for forestry management of mixed-deciduous woodlands was developed to improve the habitat quality of potential middle spotted woodpecker territories. Many other threatened species with similar habitat requirements might also profit. |
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