Dokumente Fakultät für Geowissenschaften und Geographie (inkl. GAUSS) nach Gutachter "Thiel, Volker Prof. Dr."
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“Keratose” sponge fossils and microbialites: a geobiological contribution to the understanding of metazoan origin
(2015-02-18)Molecular clock and the fossil record at the Precambrian-Cambrian boundary indicate that animals probably had a long evolutionary history in the Precambrian which is still poorly explored and understood. This PhD study was ... -
Measuring and tracking suspended sediment on tidal flats and inundated marshland: Relevance for vertical accretion rates and coastal protection measures on the North Frisian Halligen
(2021-04-13)Inhabited coastal areas around the world have to deal with sea level rise (SLR) and its likely consequences such as increasing natural hazards like heavy storms, flooding events and coastal lowland loss by drowning over ... -
Microbial metabolisms and calcification in freshwater biofilms
(2008-04-18)In this study, biofilms of two CO2-degassing karst-water creeks in Germany, which attain high calcite supersaturation during their course downstream, were investigated with regard to the effects of microbial activity ... -
Microbial sulfate reduction in the tissue of the cold-water sponge Geodia barretti (Tetractinellida, Demospongiea)
(2003-06-12)Metabolic rates, community structure and the chemical micro-environment of sulfate-reducing bacteria (SRB) within the tissue of the boreal demosponge Geodia barretti were examined, and ... -
Mikrobielle Diversität an diffusen Quellen des Mittel-Atlantischen Rückens
(2010-11-30)The deep sea floor forms largest associated ecosystem on earth. With it´s numerous ecological niches such as mud-volcanoes, cold seeps and hot and low-temperature influenced vents it could ... -
Numerical modelling of single- and multi-phase flow and transport processes in porous media for assessing hydraulic fracturing impacts on groundwater resources
(2020-05-28)The environmental footprint of hydraulic fracturing has gained substantial attention in the water – energy nexus as the technology is relatively new and its long-term impacts are not thoroughly understood. Of primary ... -
Paläoökologische und geochemische Studien auf Schwamm-Mikroinkrustrierer- Gemeinschaften ausgewählter Cipit Kalke aus der St. Cassian Formation (Unterkarn, Obertrias) von der Dolomiten, Nordostitalien
(2010-12-23)The Lower Carnian St. Cassian Formation (Dolomites, NE Italy) is well known for its very diverse and exceptionally well-preserved fauna. It dates from Middle to Late Triassic and comprises ... -
Probing molecular tracers in geobiological systems using imaging mass spectrometry
(2013-05-06)In this thesis ToF-SIMS was applied to the study of geobiological samples. Except for a few pioneering studies, ToF-SIMS has rarely been used in the field of geobiology and thus only a limited number of SIMS reference ... -
Raman spectroscopy in Geobiology - Advances in detection and interpretation of organic signatures in rocks and minerals
(2014-01-21)In this thesis, Raman spectroscopy was applied to a broad range of rock types in order to test the ability of detecting and interpreting organic signals. In the field of geobiology Raman spectroscopy is relatively new, and ... -
Rezente und subfossile Mikrobialithe westaustralischer Salzseen
(2006-03-24)Calcification processes on organic matrix and biofilms have been in focus of carbonate sedimentological and biogeochemical investigations in recent years . Biofilms which are rich in ... -
Tracer compounds in geothermal reservoirs: Improving the outcome quality of a tracer test
(2018-04-20)In a tracer test, applied tracers are introduced and transported with a working fluid so that the tracer response signals can be used to determine the target parameters of the aquatic system, such as temperatures, flow ... -
Triple oxygen isotope ratios of bioapatite
(2022-04-07)Bioapatite is the major crystalline component of bone and tooth materials. Recent studies demonstrated that bioapatite carries information of animals’ physiology and living environmental conditions and retains its original ... -
Use of selected anthropogenic pesticides, nutrients, and biomarkers to spatially and temporally characterize eutrophication dynamics at a shallow lake (Lake Seeburg)
(2022-11-09)Eutrophication of water bodies caused by high nutrient inputs, especially of phosphorus, is a global concern for a wide variety of ecosystems. To assess this problem, different monitoring approaches have been applied to a ...