Hause-Reitner, Dorothea

[["dc.bibliographiccitation.firstpage","219"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","International Journal of Astrobiology"],["dc.bibliographiccitation.lastpage","229"],["dc.bibliographiccitation.volume","15"],["dc.contributor.author","Rincón-Tomás, Blanca"],["dc.contributor.author","Khonsari, Bahar"],["dc.contributor.author","Mühlen, Dominik"],["dc.contributor.author","Wickbold, Christian"],["dc.contributor.author","Schäfer, Nadine"],["dc.contributor.author","Hause-Reitner, Dorothea"],["dc.contributor.author","Hoppert, Michael"],["dc.contributor.author","Reitner, Joachim"],["dc.date.accessioned","2020-12-10T15:22:23Z"],["dc.date.available","2020-12-10T15:22:23Z"],["dc.date.issued","2016"],["dc.description.abstract","Carbonate minerals such as dolomite, kutnahorite or rhodochrosite are frequently, but not exclusively generated by microbial processes. In recent anoxic sediments, Mn(II)carbonate minerals (e.g. rhodochrosite, kutnahorite) derive mainly from the reduction of Mn(IV) compounds by anaerobic respiration. The formation of huge manganese-rich (carbonate) deposits requires effective manganese redox cycling in an oxygenated atmosphere. However, putative anaerobic pathways such as microbial nitrate-dependent manganese oxidation, anoxygenic photosynthesis and oxidation in ultraviolet light may facilitate manganese cycling even in an early Archean environment, without the availability of oxygen. In addition, manganese carbonates precipitate by microbially induced processes without change of the oxidation state, e.g. by pH shift. Hence, there are several ways how these minerals could have been formed biogenically and deposited in Precambrian sediments. We will summarize microbially induced manganese carbonate deposition in the presence and absence of atmospheric oxygen and we will make some considerations about the biogenic deposition of manganese carbonates in early Archean settings."],["dc.identifier.doi","10.1017/S1473550416000264"],["dc.identifier.eissn","1475-3006"],["dc.identifier.isi","000381033400006"],["dc.identifier.issn","1473-5504"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/73384"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1475-3006"],["dc.relation.issn","1473-5504"],["dc.title","Manganese carbonates as possible biogenic relics in Archean settings"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.contributor.author","Rincon-Tomas, Blanca"],["dc.contributor.author","Somoza, Luis"],["dc.contributor.author","Sauter, Kathrin"],["dc.contributor.author","Hause-Reitner, Dorothea"],["dc.contributor.author","Madureira, Pedro"],["dc.contributor.author","Schneider, Dominik"],["dc.contributor.author","González, Francisco Javier"],["dc.contributor.author","Medialdea, Teresa"],["dc.contributor.author","Carlsson, Jens"],["dc.contributor.author","Reitner, Joachim"],["dc.contributor.author","Hoppert, Michael"],["dc.date.accessioned","2019-07-22T13:55:37Z"],["dc.date.available","2019-07-22T13:55:37Z"],["dc.date.issued","2019"],["dc.description.abstract","Siboglinid worms were sampled from four mud volcanoes in the Gulf of Cádiz (El Cid MV, Bonjardim MV, Al Gacel MV and Anastasya MV). These invertebrates are characteristic to cold seeps and are known to host chemosynthetic endosymbionts in a dedicated trophosome organ. However, little is known about their tube as a potential niche for other chemosynthetic and non-chemosynthetic microorganisms. Analyses by scanning and transmission electron microscopy showed dense biofilms on the tube in Al Gacel MV and Anastasya MV specimens by prokaryotic cells. Methanotrophic bacteria were the most abundant forming these biofilms as further confirmed by 16S rRNA sequence analysis. Furthermore, elemental analyses with electron microscopy and EDX point to the progressive mineralization of the biofilm and the tube in absence of nutrients. Environmental bacterial and archaeal 16S rRNA sequence libraries revealed abundant microorganisms related to these siboglinid worms and variation in microbial communities among samples. We argue that these differences must be related to variance in seepage activity, as it is the main source of nutrients. Thus, the tube remarkably increases the microbial biomass related to the worms and needs to be incorporated as an important part of the worm’s microbiota. Furthermore, empty tubes may still influence the composition of the active microbial community at those sites."],["dc.identifier.doi","10.7287/peerj.preprints.27730v1"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61812"],["dc.language.iso","en"],["dc.title","New insights into Siboglinidae microbiota - external tube contributes to an increment of the total microbial biomass"],["dc.type","preprint"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","168"],["dc.bibliographiccitation.journal","Applied Geochemistry"],["dc.bibliographiccitation.lastpage","176"],["dc.bibliographiccitation.volume","67"],["dc.contributor.author","Cangemi, Marianna"],["dc.contributor.author","Censi, Paolo"],["dc.contributor.author","Reimer, Andreas"],["dc.contributor.author","D'Alessandro, Walter"],["dc.contributor.author","Hause-Reitner, Dorothea"],["dc.contributor.author","Madonia, Paolo"],["dc.contributor.author","Oliveri, Ygor"],["dc.contributor.author","Pecoraino, Giovannella"],["dc.contributor.author","Reitner, Joachim"],["dc.date.accessioned","2018-11-07T10:16:23Z"],["dc.date.available","2018-11-07T10:16:23Z"],["dc.date.issued","2016"],["dc.description.abstract","Alkaline lakes like the hydrothermally affected lake Specchio di Venere (Pantelleria Island, Central Mediterranean) are typical geological settings harbouring calcified microbial mats. The present work is focused on the discrimination between biotic and abiotic processes driving carbonate precipitation in this lake, using hydrochemical, mineralogical and isotopic data. Hydrochemical analyses demonstrate that the lake is nearly 10-fold supersaturated with regard to aragonite and seasonally reaches hydromagnesite supersaturation. Microscopic observations depict organosedimentary laminated structures consisting of microbial communities and aragonitic precipitates, which are rather disseminated in pores than directly linked to microorganisms. Oxygen isotopic data indicate that authigenic carbonate crystallisation from evaporating water is the dominant precipitation process, further suggested by the absence of textural evidence of diagenetic processes. Conversely, the observed delta C-13 values reflect an influence of extracellular polymeric substances (EPS) on carbon fractionation during the precipitation process, due to the selective sequestration of C-12 in the biomass. The above considerations suggest that at lake Specchio di Venere the carbonate precipitation is mainly of inorganic nature, but a minor role played by biologically influenced processes in microbial mats is not excluded. (C) 2016 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.apgeochem.2016.02.012"],["dc.identifier.isi","000372720900015"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41030"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0883-2927"],["dc.title","Carbonate precipitation in the alkaline lake Specchio di Venere (Pantelleria Island, Italy) and the possible role of microbial mats"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]