Hoppert, Michael

[["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Geochimica et Cosmochimica Acta"],["dc.bibliographiccitation.volume","74"],["dc.contributor.author","Hoppert, Michael"],["dc.contributor.author","Dreier, Anne"],["dc.contributor.author","Heller, C."],["dc.contributor.author","Kokoschka, Sebastian"],["dc.contributor.author","Krukenberg, Viola"],["dc.contributor.author","Reitner, Joachim"],["dc.contributor.author","Taviani, Marco"],["dc.contributor.author","Wrede, Christoph"],["dc.date.accessioned","2018-11-07T08:42:40Z"],["dc.date.available","2018-11-07T08:42:40Z"],["dc.date.issued","2010"],["dc.identifier.isi","000283941401208"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/19753"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.publisher.place","Oxford"],["dc.relation.conference","Conference on Goldschmidt 2010 - Earth, Energy, and the Environment"],["dc.relation.eventlocation","Knoxville, TN"],["dc.title","Microbial activity in terrestrial mud volcanoes from the Northern Apennines"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","13"],["dc.bibliographiccitation.journal","Geochimica et Cosmochimica Acta"],["dc.bibliographiccitation.volume","73"],["dc.contributor.author","Heller, C."],["dc.contributor.author","Blumenberg, Martin"],["dc.contributor.author","Dreier, Anne"],["dc.contributor.author","Wrede, Christoph"],["dc.contributor.author","Zilla, Thomas"],["dc.contributor.author","Kokoschka, Sebastian"],["dc.contributor.author","Heim, C."],["dc.contributor.author","Hoppert, Michael"],["dc.contributor.author","Taviani, M."],["dc.contributor.author","Reitner, Joachim"],["dc.date.accessioned","2018-11-07T08:29:13Z"],["dc.date.available","2018-11-07T08:29:13Z"],["dc.date.issued","2009"],["dc.identifier.isi","000267229901266"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/16598"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.publisher.place","Oxford"],["dc.relation.conference","19th Annual VM Goldschmidt Conference"],["dc.relation.eventlocation","Davos, SWITZERLAND"],["dc.title","First results of geo- and biochemical analyses of terrestrial methane-emittingen mud volcanoes in Italy"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","UNSP 102972"],["dc.bibliographiccitation.journal","Archaea"],["dc.contributor.author","Wrede, Christoph"],["dc.contributor.author","Kokoschka, Sebastian"],["dc.contributor.author","Dreier, Anne"],["dc.contributor.author","Heller, Christina"],["dc.contributor.author","Reitner, Joachim"],["dc.contributor.author","Hoppert, Michael"],["dc.date.accessioned","2018-11-07T09:29:51Z"],["dc.date.available","2018-11-07T09:29:51Z"],["dc.date.issued","2013"],["dc.description.abstract","The syntrophic community between anaerobic methanotrophic archaea and sulfate reducing bacteria forms thick, black layers within multi-layered microbial mats in chimney-like carbonate concretions of methane seeps located in the Black Sea Crimean shelf. The microbial consortium conducts anaerobic oxidation of methane, which leads to the formation of mainly two biomineral by-products, calcium carbonates and iron sulfides, building up these chimneys. Iron sulfides are generated by the microbial reduction of oxidized sulfur compounds in the microbial mats. Here we show that sulfate reducing bacteria deposit biogenic iron sulfides extra-and intracellularly, the latter in magnetosome-like chains. These chains appear to be stable after cell lysis and tend to attach to cell debris within the microbial mat. The particles may be important nuclei for larger iron sulfide mineral aggregates."],["dc.identifier.doi","10.1155/2013/102972"],["dc.identifier.isi","000320810200001"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10612"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31151"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1472-3646"],["dc.relation.orgunit","Fakultät für Geowissenschaften und Geographie"],["dc.rights","CC BY 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/3.0/"],["dc.title","Deposition of Biogenic Iron Minerals in a Methane Oxidizing Microbial Mat"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","480"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","FEMS Microbiology Ecology"],["dc.bibliographiccitation.lastpage","493"],["dc.bibliographiccitation.volume","81"],["dc.contributor.author","Dreier, Anne"],["dc.contributor.author","Stannek, Lorena"],["dc.contributor.author","Blumenberg, Martin"],["dc.contributor.author","Taviani, Marco"],["dc.contributor.author","Sigovini, Marco"],["dc.contributor.author","Wrede, Christoph"],["dc.contributor.author","Thiel, Volker"],["dc.contributor.author","Hoppert, Michael"],["dc.date.accessioned","2018-11-07T09:08:01Z"],["dc.date.available","2018-11-07T09:08:01Z"],["dc.date.issued","2012"],["dc.description.abstract","Endosymbionts in marine bivalves leave characteristic biosignatures in their host organisms. Two nonseep bivalve species collected in Mediterranean lagoons, thiotrophic symbiotic Loripes lacteus and filter-feeding nonsymbiotic Venerupis aurea, were studied in detail with respect to generation and presence of such signatures in living animals, and the preservation of these signals in subfossil (late Pleistocene) sedimentary shells. Three key enzymes from sulfur oxidation (APS-reductase), CO2 fixation (RubisCO) and assimilation of nitrogen [glutamine synthetase (GS)] were detected by immunofluorescence in the bacterial symbionts of Loripes. In Loripes, major activity was derived from GS of the symbionts whereas in Venerupis the host GS is active. In search of geologically stable biosignatures for thiotrophic chemosymbiosis that might be suitable to detect such associations in ancient bivalves, we analyzed the isotopic composition of shell lipids (d 13C ) and the bulk organic matrix of the shell (d 13C , d 15N , d 34S ). In the thiotrophic Loripes, d 13C values were depleted compared with the filter-feeding Venerupis by as much as 8.5 parts per thousand for individual fatty acids, and 4.4 parts per thousand for bulk organic carbon. Likewise, bulk d 15N and d 34S values were more depleted in recent thiotrophic Loripes. Whereas d 34S values were found to be unstable over time, the combined d 15N and d 13C values in organic shell extracts revealed a specific signature for chemosymbiosis in recent and subfossil specimens."],["dc.identifier.doi","10.1111/j.1574-6941.2012.01374.x"],["dc.identifier.isi","000306185300018"],["dc.identifier.pmid","22458451"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/25930"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.relation.issn","0168-6496"],["dc.title","The fingerprint of chemosymbiosis: origin and preservation of isotopic biosignatures in the nonseep bivalve Loripes lacteus compared with Venerupis aurea"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","85"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Journal of Microbiological Methods"],["dc.bibliographiccitation.lastpage","91"],["dc.bibliographiccitation.volume","73"],["dc.contributor.author","Wrede, Christoph"],["dc.contributor.author","Heller, Christina"],["dc.contributor.author","Reitner, Joachim"],["dc.contributor.author","Hoppert, Michael"],["dc.date.accessioned","2018-11-07T11:15:38Z"],["dc.date.available","2018-11-07T11:15:38Z"],["dc.date.issued","2008"],["dc.description.abstract","In several fields of cell biology, correlative microscopy is applied to compare the structure of objects at high resolution under the electron microscope with low resolution light microscopy images of the same sample. It is, however, difficult to prepare samples and marker systems that are applicable for both microscopic techniques for the same specimen at the same time. In our studies, we used microbial mats from Cold Seep communities for a simple and rapid correlative microscopy method. The mats consist of bacterial and archaeal microorganisms, coupling reverse methanogenesis to the reduction of sulfate. The reverse methanogenic pathway also generates carbonates that precipitate inside the mat and may be the main reason for the formation of a microbial reef. The mat shows highly differentiated aggregates of various organisms, tightly interconnected by extracellular polysaccharides. In order to investigate the role of EPS as adhesive mucilage for the biofilm and as a precipitation matrix for carbonate minerals, samples were embedded in a hydrophilic resin (Lowicryl K4 M). Sections were suitable for light as well as electron microscopy in combination with lectins, either labeled with a fluorescent marker or with colloidal gold. This allows lectin mapping at low resolution for light microscopy in direct comparison with a highly resolved electron microscopic image.(c) 2008 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.mimet.2008.02.020"],["dc.identifier.isi","000256165200002"],["dc.identifier.pmid","18405985"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/54408"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0167-7012"],["dc.title","Correlative light/electron microscopy for the investigation of microbial mats from Black Sea Cold Seeps"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","210"],["dc.bibliographiccitation.journal","Sedimentary Geology"],["dc.bibliographiccitation.lastpage","219"],["dc.bibliographiccitation.volume","263"],["dc.contributor.author","Wrede, Christoph"],["dc.contributor.author","Brady, Silja"],["dc.contributor.author","Rockstroh, Stephanie"],["dc.contributor.author","Dreier, Anne"],["dc.contributor.author","Kokoschka, Sebastian"],["dc.contributor.author","Heinzelmann, S. M."],["dc.contributor.author","Heller, C."],["dc.contributor.author","Reitner, Joachim"],["dc.contributor.author","Taviani, Marco"],["dc.contributor.author","Daniel, Roy Thomas"],["dc.contributor.author","Hoppert, Michael"],["dc.date.accessioned","2018-11-07T09:09:02Z"],["dc.date.available","2018-11-07T09:09:02Z"],["dc.date.issued","2012"],["dc.description.abstract","Methane oxidizing prokaryotes are ubiquitous in oxic and anoxic habitats wherever C-1-compounds are present. Thus, methane saturated mud volcano fluids should be a preferred habitat of methane consuming prokaryotes, using the readily available electron donors. In order to understand the relevance of methane as a carbon and energy source in mud volcano communities, we investigate the diversity of prokaryotic organisms involved in oxidation of methane in fluid samples from the Salse di Nirano mud volcano field situated in the Northern Apennines. Cell counts were at approximately 0.7 x 10(6) microbial cells/ml. A fraction of the microbial biomass was identified as ANME (anaerobic methanotroph) archaea by fluorescence in situ hybridization (FISH) analysis. They are associated in densely colonized flakes, of some tens of mu m in diameter, embedded in a hyaline matrix. Diversity analysis based on the 16S rDNA genes, retrieved from amplified and cloned environmental DNA, revealed a high proportion of archaea, involved in anaerobic oxidation of methane (AOM). Aerobic methane-oxidizing proteobacteria could be highly enriched from mud volcano fluids, indicating the presence of aerobic methanotrophic bacteria, which may contribute to methane oxidation, whenever oxygen is readily available. The results imply that biofilms, dominated by ANME archaea, colonize parts of the mud volcano venting system. (C) 2011 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.sedgeo.2011.06.004"],["dc.identifier.isi","000304851400020"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26172"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0037-0738"],["dc.title","Aerobic and anaerobic methane oxidation in terrestrial mud volcanoes in the Northern Apennines"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","596846"],["dc.bibliographiccitation.journal","Archaea"],["dc.contributor.author","Wrede, Christoph"],["dc.contributor.author","Dreier, Anne"],["dc.contributor.author","Kokoschka, Sebastian"],["dc.contributor.author","Hoppert, Michael"],["dc.date.accessioned","2018-11-07T09:14:38Z"],["dc.date.available","2018-11-07T09:14:38Z"],["dc.date.issued","2012"],["dc.description.abstract","During the last few years, the analysis of microbial diversity in various habitats greatly increased our knowledge on the kingdom Archaea. At the same time, we became aware of the multiple ways in which Archaea may interact with each other and with organisms of other kingdoms. The large group of euryarchaeal methanogens and their methane oxidizing relatives, in particular, take part in essential steps of the global methane cycle. Both of these processes, which are in reverse to each other, are partially conducted in a symbiotic interaction with different partners, either ciliates and xylophagous animals or sulfate reducing bacteria. Other symbiotic interactions are mostly of unknown ecological significance but depend on highly specific mechanisms. This paper will give an overview on interactions between Archaea and other organisms and will point out the ecological relevance of these symbiotic processes, as long as these have been already recognized."],["dc.description.sponsorship","DFG [Ho 1830/2-1]; Studienstiftung des Deutschen Volkes"],["dc.identifier.doi","10.1155/2012/596846"],["dc.identifier.isi","000313201400001"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9778"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/27463"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Hindawi Publishing Corporation"],["dc.relation.issn","1472-3646"],["dc.rights","CC BY 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/3.0/"],["dc.title","Archaea in Symbioses"],["dc.type","review"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","920241"],["dc.bibliographiccitation.journal","Archaea"],["dc.contributor.author","Wrede, Christoph"],["dc.contributor.author","Walbaum, Ulrike"],["dc.contributor.author","Ducki, Andrea"],["dc.contributor.author","Heieren, Iris"],["dc.contributor.author","Hoppert, Michael"],["dc.date.accessioned","2018-11-07T09:30:12Z"],["dc.date.available","2018-11-07T09:30:12Z"],["dc.date.issued","2013"],["dc.description.abstract","Methyl-Coenzyme M reductase (MCR) as key enzyme for methanogenesis as well as for anaerobic oxidation of methane represents an important metabolic marker for both processes in microbial biofilms. Here, the potential of MCR-specific polyclonal antibodies as metabolic marker in various methanogenic Archaea is shown. For standard growth conditions in laboratory culture, the cytoplasmic localization of the enzyme in Methanothermobacter marburgensis, Methanothermobacter wolfei, Methanococcus maripaludis, Methanosarcina mazei, and in anaerobically methane-oxidizing biofilms is demonstrated. Under growth limiting conditions on nickel-depleted media, at low linear growth of cultures, a fraction of 50-70% of the enzyme was localized close to the cytoplasmic membrane, which implies \"facultative\" membrane association of the enzyme. This feature may be also useful for assessment of growth-limiting conditions in microbial biofilms."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2013"],["dc.identifier.doi","10.1155/2013/920241"],["dc.identifier.isi","000315876200001"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10613"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31247"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Hindawi Publishing Corporation"],["dc.relation.issn","1472-3646"],["dc.relation.orgunit","Fakultät für Geowissenschaften und Geographie"],["dc.rights","CC BY 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/3.0/"],["dc.title","Localization of Methyl-Coenzyme M Reductase as Metabolic Marker for Diverse Methanogenic Archaea"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Geochimica et Cosmochimica Acta"],["dc.bibliographiccitation.volume","74"],["dc.contributor.author","Wrede, Christoph"],["dc.contributor.author","Heller, C."],["dc.contributor.author","Reitner, Joachim"],["dc.contributor.author","Hoppert, Michael"],["dc.date.accessioned","2018-11-07T08:42:41Z"],["dc.date.available","2018-11-07T08:42:41Z"],["dc.date.issued","2010"],["dc.identifier.isi","000283941400324"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/19759"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.publisher.place","Oxford"],["dc.relation.conference","Conference on Goldschmidt 2010 - Earth, Energy, and the Environment"],["dc.relation.eventlocation","Knoxville, TN"],["dc.title","A novel in situ detection technique of metabolic enzymes in Black Sea methane seep microbial mats"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Geochimica et Cosmochimica Acta"],["dc.bibliographiccitation.volume","74"],["dc.contributor.author","Heller, C."],["dc.contributor.author","Blumenberg, Martin"],["dc.contributor.author","Reimer, Andreas"],["dc.contributor.author","Wrede, Christoph"],["dc.contributor.author","Hoppert, Michael"],["dc.contributor.author","Taviani, Marco"],["dc.contributor.author","Reitner, Joachim"],["dc.date.accessioned","2018-11-07T08:42:40Z"],["dc.date.available","2018-11-07T08:42:40Z"],["dc.date.issued","2010"],["dc.identifier.isi","000283941401166"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/19752"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.publisher.place","Oxford"],["dc.relation.conference","Conference on Goldschmidt 2010 - Earth, Energy, and the Environment"],["dc.relation.eventlocation","Knoxville, TN"],["dc.title","Microbial ecology of terrestrial methane-emitting mud volcanoes in Italy"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]