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Research project (§ 26 & § 27)
Duration : 2021-10-01 - 2024-09-30

Genotype determination is very important in forestry as part of management, controlled seed production and the monitoring of the provenance principle. With the upcoming of the second and third generation sequencing techniques (NGS), sequence based approaches are available for routine screening. Especially useful is a method that bridges traditional and new possibilities, with high throughput and statistical power, but easy to use and to implement. The main problem to use sequence information for genotyping, is the bioinformatic processing. One problem is the difficulty to unambiguous determine alleles in heterozygote individuals . A number of pipelines and suggestions had been published, however, most are elaborate or not able to use the whole sequences of a marker but rather single SNPs or length information. The project aims to introduce genotype by amplicon sequencing for standardized genotyping in forestry (SSR-GBAS). Scripts we developed in earlier work will from the base for software solutions with wide applicability. A database for web based collection of alleles called by whole sequences developed and clearly reproduced genotypes on Oak and Pine on up to 200 markers each as proof of concept will be provided. The project will also improve laboratory methods by developing optimized multiplex approaches and the inclusion of candidate genes as well as neutral markers. All together the approach allows a flexible genotyping of forest genetic resources.
Research project (§ 26 & § 27)
Duration : 2022-01-01 - 2024-12-31

The Alpine chamois (Rupicapra r. rupicapra) is considered a flagship species of the alpine and montane regions of Europe, which can be quite sensitive to habitat changes. Although the chamois is classified as "not endangered" throughout Europe, some regions have recorded a decline in counted chamois populations or hunting distances in recent decades (especially in the Alpine region). This development is attributed to a combination of various factors, whereby anthropogenic disturbances, high hunting pressure and climate change are defined as major influencing factors. In this project, therefore, the movement patterns of chamois and thus their habitat use will be analyzed using modern GPS collar systems. The use in space and time will be investigated against the background of possible influencing factors (vegetation, climate, human disturbances, etc.). In addition, the transmittered chamois are administered pan probes, which are used to measure the heartbeat and the internal body temperature. This will allow quantification of energy metabolism and thus document physiological consequences of external conditions as well as behavioral adaptations. Based on the results of this project, it will be possible to estimate the influence of climatic effects as well as human activities on the space-time behavior, activity and metabolism of chamois. This will contribute to a sound scientific basis for a sustainable management of this game species in order to counteract a negative trend of chamois populations as well as undesirable game impact on forest vegetation. Such a management should help to preserve the forest, the mountains and the chamois in the long term and at the same time guarantee the utilization demands of man.
Research project (§ 26 & § 27)
Duration : 2017-03-01 - 2018-12-31

The von Bertalanffy equation was developed in the 1940s and has since been the almost universal biologically motivated model to describe the ontogenetic growth of different species; it is characterized by the metabolic exponents a = 2/3, b = 1. West et al. (1997, 2001) suggested another pair of metabolic exponents (a = 2/3, b = 1) and provided biological reasoning for this choice. This project proposes biological reasoning for yet two other exponent pairs based on the ideas of Bertalanffy and West about metabolism and on a model of Parks (1982) about the dependency of growth on food intake.

Supervised Theses and Dissertations