caa a22 4500 475751272 CHVBK 20180406123524.0 cr unu---uuuuu 170329e20000201xx s 000 0 eng 10.1023/A:1009827628125 doi (NATIONALLICENCE)springer-10.1023/A:1009827628125 Topographic influences on radial growth of Scots pine (Pinus sylvestris L.) at small spatial scales [Elektronische Daten] [Walter Oberhuber, Werner Kofler] Dendroecological and numerical methods were used to study the influence of topographic position on radial growth of Scots pine (Pinus sylvestris) stands exposed to soil dryness. The correlation structure of total tree-ring width and latewood width of eight scattered populations representing various topographic habitats (steep south-facing slopes, plateaus and hollows) within a rock-slide area (750m a.s.l.) of about 1km2 was investigated by principal component analysis. Scatter plots of component loadings indicated that (i) total ring width and latewood width are influenced by various climatic factors, (ii) stands growing at similar topographic position show a high agreement in year-to-year variability of radial growth, and (iii) distinct effects of topographic features (slope aspect, slope magnitude) on tree growth are modified by local disturbances (erosion, grazing) and the age structure of stands. Furthermore, both the time series of component scores and non-metric multidimensional scaling of chronologies indicated years where extremely limiting or favorable climate conditions prevailed throughout the study area (pointer years). The influence of climate on tree growth in various topographic habitats was mediated through the influence of climatically stressful years. Because stands are located at sites with different levels of water stress, growth differences between chronologies are considered to be caused by site-specific susceptibility of tree growth to soil dryness. Significant correlations between precipitation in April to June and ring-width confirm that water availability is the primary growth-limiting factor within the study area. These small-scale variations in growth-climate relationships have significant implications for dendroclimatological studies. So paleoclimatic reconstructions based on tree rings will have to assure that an unbiased data set is used, which compensates for local growth-variabilities due to site related environmental stresses. Kluwer Academic Publishers, 2000 Dendroclimatology nationallicence Dendroecology nationallicence Multidimensional Scaling nationallicence Principal component analysis nationallicence Soil dryness nationallicence Tree-rings nationallicence Oberhuber Walter Institut für Botanik der Leopold-Franzens-Universität Innsbruck, Sternwartestrasse 15, A-6020, Innsbruck, Austria aut Kofler Werner Institut für Botanik der Leopold-Franzens-Universität Innsbruck, Sternwartestrasse 15, A-6020, Innsbruck, Austria aut Plant Ecology Kluwer Academic Publishers 146/2(2000-02-01), 229-238 1385-0237 146:2<229 2000 146 11258 https://doi.org/10.1023/A:1009827628125 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1009827628125 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Oberhuber Walter Institut für Botanik der Leopold-Franzens-Universität Innsbruck, Sternwartestrasse 15, A-6020, Innsbruck, Austria aut NATIONALLICENCE 700 1- Kofler Werner Institut für Botanik der Leopold-Franzens-Universität Innsbruck, Sternwartestrasse 15, A-6020, Innsbruck, Austria aut NATIONALLICENCE 773 0- Plant Ecology Kluwer Academic Publishers 146/2(2000-02-01), 229-238 1385-0237 146:2<229 2000 146 11258 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer