Das Projekt "Forstbetriebsinventur mit Bayes Schaetzungen" wird vom Umweltbundesamt gefördert und von Universität Freiburg, Forstwissenschaftliche Fakultät, Institut für Waldwachstum, Abteilung Forstliche Biometrie durchgeführt.
Das Projekt "Faktoren zur Limitierung saproxyler Insekten: Habitatbeziehungen einer gefaehrdeten oekologischen Gruppe" wird vom Umweltbundesamt gefördert und von Eidgenössische Technische Hochschule Zürich, Institut für Physikalische Chemie, Departement Umweltnaturwissenschaften durchgeführt. Dead and decaying wood is one major component of European forests that has been nearly eradicated by silvicultural practices, although it provides habitat for a wide variety of species. Among these, saproxylic insects form the largest group. They do not only suffer from the destruction of their habitat, but also from the effects of isolation. In our project, we quantify the effects of the amount, quality, and spatial configuration of dead wood on species richness, diversity, and abundance of saproxylic Diptera and Coleoptera using eclectors and trunk window-traps. Our study is carried out in the Sihlwald (Kt. Zuerich, Switzerland), a forest in transition from amanged to natural state, which has recently become a reserve. The results are interpreted on the basis of habitat relationship models. These approaches have strong predictive power on forest management and conservation planning. Leading Questions: 1. Is species-specific abundance of saproxylic insects a function of the amount of dead wood of a certain quality? 2. Is there a relationship between the connectedness of dead wood and the abundance of saproxylic insects? 3. Does the fauna associated with branches of beech (Fagus sylvatica) contribute significantly to the overall species richness and diversity ?