Suchergebnisse

Zusammenfassung: Die von Barker (1968) in der "ecological psychology" gestellten Frage nach der raumzeitlichen Verteilung von Verhaltensweisen im Alltagsgeschehen blieb in der Sozial- und Umweltpsychologie weitgehend unbeantwortet. Ziel dieses Beitrags ist es, auf der Basis eines Projekts über die Waldbesitzermotive von WaldbesitzerInnen in Nordrhein-Westfalen räumliche Verteilungsmuster dieser Motive beispielhaft für Siegen-Wittgenstein zu untersuchen. Ein systematisches 1km × 1km Stichprobennetz der Landeswaldinventur wird für die Ermittlung der Stichprobe für die schriftliche Befragung verwendet (n = 88). Mittels Methoden der räumlichen statistischen Analyse der Geostatistik lassen sich aus den geografisch lokalisierbaren Daten zur "Vermögensorientierung" räumliche Muster auffinden, die aus der spezifischen Waldbesitzstruktur erklärt werden können. Für einen Flächenausschnitt wurde die "Vermögensorientierung" der Privatwaldbesitzer simuliert. Der Ansatz wird als "attitude mining" bezeichnet.

Several factors influence land availability for the growth of short rotation coppices (SRC) with fast-growing tree species, including the nationwide availability of agricultural land, economic efficiency, ecological impacts, political boundaries and environmental protection regulations. In this study, we analysed the growing potential of poplar and willow SRC for bioenergy purposes in Germany without negative ecological impacts or land use conflicts. The potential biomass production using SRC on agricultural land in Germany was assessed taking into account ecological, ethical, political and technical restrictions. Using a geographic information system (GIS), digital site maps, climate data and a digital terrain model, the SRC biomass production potential on cropland and grassland was estimated using water supply and mean temperature during the growing season as parameters. From this analysis, a yield model for SRC was developed based on the analysed growth data and site information of 62 short rotation plantations in Germany and France. To assess the technical, ethical and ecological potential of SRC, restrictions in protected areas, technical constraints and competition with food and feed production were investigated. Our results revealed that approximately 18% (2.12 Mio. ha) of cropland and 54% (2.5 Mio. ha) of grassland in Germany were highly suitable for SRC plantations, providing favourable water supplies and mean temperatures during the growing season. These identified sites produced an average yield of more than 14 tons of dry matter per hectare per year. Due to local climate and soil conditions, the federal states in northern and eastern Germany had the highest theoretical SRC potential for agricultural land. After considering all ecological, ethical, political and technical restrictions, as well as future climate predictions, 5.7% (680 000 ha) of cropland and 33% (1.5 Mio. ha) of grassland in Germany were classified as suitable for biomass production with fast-growing tree species in SRC.