Sebastian Hein

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The influence of stand density on Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] is conceptually understood, but for wide spacings not well quantified, particularly in Europe. This study used 41 trees from 7 different locations in south-western Germany to compare important tree- and branch-level attributes across three different densities, namely 100,(More)
The effects of stand density on increment and branch properties were studied in three spacing experiments of Norway spruce [Picea abies (L.) Karst.]. The stand densities ranged from 350 stems ha−1, regarded as open-grown trees, up to 1,600 stems ha−1, corresponding to the density recommended for forestry practice. Properties of all the branches were(More)
The Of/Oh-horizons of 447 forest stands in Germany were evaluated for concentrations and spatial distribution of selected polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and organochlorine pesticides (OCPs). While concentrations of dichlorodiphenyltrichloroethane (DDT) and PCBs show similar spatial distribution patterns for all(More)
Models of binary outcomes are commonly used in forestry, but the predictions errors of these types of models are difficult to present effectively. In addition, most studies generally use a fixed value of 0.5 as the separation between events and non-events. The use of cutpoint analysis has been widely utilized in the health sciences and other fields, while(More)
The aim of this study was to set up allometric models on the development of open-grown trees (OGT) of ash (Fraxinus excelsior L.) and sycamore (Acer pseudoplatanus L.). Sampling was carried out during a study on valuable broadleaves in Europe and covers a geographical location from 0° to 9° eastern longitude and 47° to 51° northern latitude in Western(More)
Tilia cordata Mill. is a minor European broadleaved species with a wide but scattered distribution. Given its scarcity and low value in the wood market, it has received little attention from researchers and forest managers. This review summarizes the main aspects of T. cordata ecology and growth. Its main limiting factor is its need for warm summer(More)
Time series are time stamped sequences of values which represent a pa rameter of the observed processes in subsequent time points Given a set of time series describing a set of similar processes the model of the behavior of processes is constructed as a range of classi cation trees which describe the characteristics of each particular time point in series(More)