Die chronologische Liste zeigt aktuelle Veröffentlichungen aus dem Forschungsbetrieb der Hochschule Weihenstephan-Triesdorf. Zuständig ist das Zentrum für Forschung und Wissenstransfer (ZFW).
Energy Wood Production – Primary Energy Supply Using Reproductive Raw Material (2002) Englisches Merkblatt für die KWF-Sonderschau, Messe Interforst, München .
Prof. Dr. Jörg Ewald
Buchbesprechung von Hubbell, S. P.: The Unified Neutral Theory of Biodiversity and Biogeography (2002) Forstwissenschaftliches Centralblatt 121 , S. 152-153.
Prof. Dr. Jörg Ewald
Berechtigungen: Peer Reviewed
Book review of Hubbell, S. P.: The Unified Neutral Theory of Biodiversity and Biogeography (2002) Folia Geobotanica 37 , S. 355-356.
Dr. Helge Walentowski,
Hans-Jürgen Gulder,
Dr. Christian Kölling,
Prof. Dr. Jörg Ewald,
Winfried Türk
Regionale natürliche Waldzusammensetzung Bayerns (2002) Berichte aus der Bayerischen Landesanstalt für Wald und Forstwirtschaft, LWF-Wissen 32, 97 S. + Karte .
Prof. Dr. Markus Reinke
Berechtigungen: Peer Reviewed
Stand und Perspektiven der Landschaftsplanung in Deutschland – Eine Analyse der Qualität kommunaler Landschaftsplanung und ihrer Berücksichtigung in der Flächennutzungsplanung im Freistaat Sachsen (2002) Natur und Landschaft 9 (10).
Enno Uhl,
Prof. Dr. Stefan Wittkopf
Energieholzgewinnung – Primärenergieversorgung mit nachwachsenden Rohstoffen (2002) Merkblatt für die KWF-Sonderschau "Holzproduktion in Verantwortung für Arbeitsschutz, Gesellschaft und Natur" bei der Messe Interforst, 03.-07.07.2002, München .
Prof. Dr. Jörg Ewald
Berechtigungen: Peer Reviewed
Multiple controls of understorey plant richness in mountain forests of the Bavarian Alps (2002) Phytocoenologia 32 (1), S. 85-100.
DOI: 10.1127/0340-269X/2002/0032-0085
The management of biodiversity in forests requires a basis derived from community ecology. In a transect representative of montane and subalpine forests at the northern fringe of the Alps, I studied the relative importance of the tree layer diversity and age, understorey cover and species pool size for species richness of vascular understorey communities. Regional species pools were estimated for seven community types represented in a large phytosociological database. Local species pool size was modelled for each community type on the basis of regional pools and grid cell data from floristic mapping. Tree-layer diversity was the only study variable unrelated to species richness. Understorey richness increased with understorey cover, species pool and stand age. Combined, these three predictors explained 46 % of the observed variation in richness in a regression model. When the species pool variable was partioned into its components, synecological information was a more powerful predictor of richness than variation in the local flora, which was likely due to the strength of site effects related to soil pH and to the relatively small geographic extent of the study. Species richness in mountain forests can be forecasted by maps of community types. Within the bounds of natural site-dependent diversity, extensive management practices allowing for moderate to high cover of understorey and the development of old growth stands favour the occurrence of forests rich in vascular plant species.
Prof. Dr. Jörg Ewald
Berechtigungen: Peer Reviewed
A probabilistic approach to estimating species pools from large compositional matrices (2002) Journal of Vegetation Science 13 (2), S. 191-198.
DOI: 10.1111/j.1654-1103.2002.tb02039.x
Species pools are increasingly recognized as important controls of local plant community structure and diversity. While existing approaches to estimate their content and size either rely on phytosociological expert knowledge or on simple response models across environmental gradients, the proposed application of phytosociological smoothing according to Beals exploits the full information of plant co‐occurrence patterns statistically. Where numerous representative compositional data are available, the new method yields robust estimates of the potential of sites to harbour plant species. To test the new method, a large phytosociological databank covering the forested regions of Oregon (US) was subsampled randomly and evenly across strata defined by geographic regions and elevation belts. The resulting matrix of species presence/absence in 874 plots was smoothed by calculating Beals' index of sociological favourability, which estimates the probability of encountering each species at each site from the actual plot composition and the pattern of species co‐occurrence in the matrix. In a second step, the resulting lists of sociologically probable species were intersected with complete species lists for each of 14 geographical subregions. Species pools were compared to observed species composition and richness. Species pool size exhibited much clearer spatial trends than plot richness and could be modelled much better as a function of climatic factors. In this framework the goal of modelling species pools is not to test a hypothesis, but to bridge the gap between manageable scales of empirical observation and the spatio‐temporal hierarchy of diversity patterns.
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Gerhard Radlmayr
Referent für Wissenstransfer und Forschungskommunikation
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