Quantitative estimation of aerobic diagenetic overprint of palaeoproductivity signals [Elektronische Ressource] / vorgelegt von Monika Kodrans-Nsiah

Quantitative estimation of aerobic diagenetic overprint of palaeoproductivity signalsDissertation zur Erlagung des Doktorgrades der Naturwissenschaften-Dr. rer. nat.-im Fachbereich Geowissenschaftender Universität Bremenvorgelegt vonMonika Kodrans-NsiahBremenApril 2008Tag des Kolloquiums:13. Juni 2008Gutachter:Dr. Karin ZonneveldDr. Sabine Kasten2Table of contentsZusammenfassung 5Abstract 81 Introduction 101.1 Objectives 101.2 Organic Carbon and preservation 141.2.1 Organic carbon cycle 141.2.2 Preservation of organic matter 161.3 Dinoflagellates 201.3.1 Biology of dinoflagellates 201.3.2 Dinocyst application 221.3.3 Dinocyst degradation 231.4 Sediment geochemistry 251.5 References 282 Preservation and organic chemistry of late Cenozoic organic-walled dinoflagellate cysts; a review 362.1 Introduction 372.2 Aerobic organic matter degradation 382.3 Selective degradation of cysts during sample preparation 412.4 Selective preservation of cysts in natural environments 442.4.1 Sediment traps 482.4.2 Surface sediments 502.4.3 Preservation experiments in natural environments 522.4.4 Late Quaternary time series 542.5 Organic geochemistry of dinoflagellate cysts 552.5.1 Acid resistant cell walls from extant micro-algae 552.5.2 Algaenans of extant micro-algae 562.5.3 Wall polymers of extant dinoflagellates 572.5.4 Fossil dinoflagellates 592.5.5 Some final remarks on cyst wall chemistry 602.6 Application 622.6.