Parcs

ID	TITEL	DATENTYP	AUTOR	JAHR
30562	Monitoring Brutvögel der Nationalparkalmen	Project	Fachbereich Naturschutz und Naturraum	2004

Bemerkungen/Beschreibung

Bird communities as an important component of many ecosystems and their special characteristics, such as the good detectability (NIPKOW 1995) or the high autecological state of knowledge (NOWAK 1982), led to considering the following question for this work: which forest inventory parameters (for example the composition of tree species or the amount of deadwood) have an influence on the avifauna of the Gesause's alpine forests? Starting from this question, twelve research sites where spatially set along a gradient of closeness to nature, differentiated by two components: the amount of deciduous wood respectively coniferous wood, and the size of the forest complex. Three bird inventories have been executed by using two different methods (point stop count and line transect count) on these research sites between mid-April and mid-June. The bird data obtained from these surveys were initially analyzed with principal components analysis and subsequently, in combination with forest parameters, in multivariate analysis. Based on the insights gained in these analyses about the effects of forest structure on ornithocoenosis, indicator species for three different characteristics of the Gesaeuse's mixed alpine forests could be derived. After that, the transferability of the results to the practical work in the Gesaeuse National Park, especially the differences between the two mapping methods, were examined. The comparison of the two mapping methods revealed that the line transect count provided significantly more reliable and more descriptive results than the point stop count and that the latter may cause an underestimation of biodiversity in near-natural mixed alpine forests. In addition, targets have been suggested to preserve and promote precious forest structures for ornithocoenosis of the mixed alpine forests in the Gesaeuse National Park.

Eintrag Nr. 34256

Bird communities in distinctively mixed alpine forests of the Ennstal Alps in the Gesaeuse National Park