Blättern Fakultät für Geowissenschaften und Geographie (inkl. GAUSS) nach Betreuer & Gutachter "Reitner, Joachim Prof. Dr."
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A geobiological approach to carbonate factories and ecosystem changes across the Permian–Triassic boundary
(2022-04-05)Contemporary climate change is accelerating. Meanwhile, “Has the Earth’s sixth mass extinction already arrived?” is inquired. The Permian–Triassic crisis, as a possible analog in the Earth history, has aroused great ... -
An integrated approach to the study of biosignatures in mineralizing biofilms and microbial mats
(2011-02-02)In this thesis project, biomarkers, biomineralization processes and TREE (trace and rare earth elements) patterns in mineralizing microbial mats were established and tested as biosignatures ... -
Assessments of phenotypic variations and variability as a tool for understanding evolutionary processes in echinoids
(2016-07-20)The following three chapters can be regarded as thematic complexes of studies on phenotypic variations and variability in order to elucidate their origins on a systematic hierarchy-level in echinoids. Chapter 2 seeks ... -
Biosignatures of modern microbial mats, Kiritimati/Kiribati, Central Pacific
(2019-10-17)Organic biomarkers have been widely used to trace the information of their biological precursors and to reveal information about fossil depositional environment, and thus they help to reconstruct ancient ecosystems. Prior ... -
Carbonate factories in the early Archean and their geobiological impacts
(2023-08-08)Paleoarchean carbonates in the Pilbara Craton (Western Australia) are important archives for early life and environment on early Earth. Amongst others, carbonates occur in interstitial spaces of ca. 3.5–3.4 Ga pillow basalts ... -
Contributions to the Palaeobiology of the Archosaurs (Reptilia: Diapsida) from the Bückeberg Formation ('Northwest German Wealden' - Berriasian-Valanginian, Lower Cretaceous) of northern Germany
(2013-11-27)Fossil remains of archosaurs, the dominant clade of non-marine tetrapods during the Mesozoic, are known from the Berriasian to Lower Valanginian Bückeberg Formation (the “German Wealden”) of northwestern Germany since the ... -
Ein Datenbanksystem (P.A.S.T) zur Verarbeitung und Interpretation von palynologischen Daten aus dem Paläogen Mitteleuropas mit Diversitätsbetrachtungen
(2002-04-18)A data base system (P.A.S.T) for processing and interpreting palynological data from the Palaeogene of Central Europe - application to diversity studiesThe first part of the thesis presents an outline ... -
Fluid venting structures of terrestrial mud volcanoes (Italy) and marine cold seeps (Black Sea) -Organo-geochemical and biological approaches
(2012-03-06)Two different fluid venting structures, marine cold seeps of the Black Sea and terrestrial mud volcanoes of Italy, were part of this thesis. Both were formed by the expulsion of water, mud ... -
Geobiology of bituminous carbonates from the Ediacaran Shibantan Member (Dengying Formation, South China)
(2014-10-08)The Shibantan Member is one of only two known carbonate settings characterised by a 'typical' Ediacaran fossil association including Ediacara-type fossils. Aim of this project was a comprehensive geobiological characterisation ... -
Geochemie Porifera-reicher Mud Mounds und Mikrobialithe des Mittel- und Oberdevons (Westaustralien, Nordfrankreich)
(2006-05-09)Mud mounds and microbialites of the Boulonnais (Northern France) and from the reefal slope facies of Upper Devonian reef complexes (Western Australia) were investigated by geochemical and ... -
Insights into the Holobiont of the Early Branching Metazoan Vaceletia sp. and its Biomineralization Strategy
(2017-12-05)Sponges are evolutionary and ecologically very successful animals. They are abundant and significant members of benthic communities throughout the world’s oceans. Having emerged during the Neoproterozoic era, sponges are ... -
Isotopengeochemische Untersuchungen an postglazialen Karbonaten des Neoproterozoikums aus China und Namibia
(2017-12-22)The Neoproterozoic time, especially the Cryogenian is characterised by extreme climate conditions. Two of the known global glaciations – the Sturt and Marinoan – occurred during this period. In the following Ediacaran ... -
“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 ... -
Die Landpflanzenevolution im Phanerozoikum aus petrographischer und geochemischer Sicht
(2006-03-17)The origin and early diversification of land plants marks an interval of unparalleled innovation in the history of plant life. From a simple plant body consisting only of a few cells, land ... -
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 ... -
Molecular and cellular differentiation during the early shell field development in Lymnaea stagnalis
(2014-02-13)Since the evolutionary emergence of the molluscan shell in the Pre-Cambrian, diverse shell forms have evolved, which are adapted to various ecological environ-ments. The innovation of the shell facilitated the vast ... -
Organische Petrologie und Mikrofazies der mitteleozänen Seesedimente des Eckfelder Maares (Südwesteifel)
(2003-02-28)The present thesis documents and discusses the results of the project "Organic petrology and microfacies of the Middle Eocene lacustrine sediments from the Eckfeld Maar (Southwest Eifel)" ... -
Paläoökologische Interaktionen von Organismen aus Baltischem und Bitterfelder Bernstein
(2020-11-06)Because of the quick fixation and detailed conservation of millions-of-years-old arthropods, other small animals and plant parts, amber is very suitable for the conservation of ancient behaviours and interactions. In this ...