Reimer, Andreas

[["dc.bibliographiccitation.firstpage","2085"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Biogeosciences"],["dc.bibliographiccitation.lastpage","2106"],["dc.bibliographiccitation.volume","17"],["dc.contributor.author","Fussmann, Dario"],["dc.contributor.author","von Hoyningen-Huene, Avril Jean Elisabeth"],["dc.contributor.author","Reimer, Andreas"],["dc.contributor.author","Schneider, Dominik"],["dc.contributor.author","Babková, Hana"],["dc.contributor.author","Peticzka, Robert"],["dc.contributor.author","Maier, Andreas"],["dc.contributor.author","Arp, Gernot"],["dc.contributor.author","Daniel, Rolf"],["dc.contributor.author","Meister, Patrick"],["dc.date.accessioned","2020-04-28T12:42:41Z"],["dc.date.available","2020-04-28T12:42:41Z"],["dc.date.issued","2020"],["dc.description.abstract","Despite advances regarding the microbial and organic-molecular impact on nucleation, the formation of dolomite in sedimentary environments is still incompletely understood. Since 1960, apparent dolomite formation has been reported from mud sediments of the shallow, oligohaline and alkaline Lake Neusiedl, Austria. To trace potential dolomite formation or diagenetic alteration processes in its deposits, lake water samples and sediment cores were analyzed with respect to sediment composition, hydrochemistry and bacterial community composition. Sediments comprise 20 cm of homogenous mud with 60 wt % carbonate, which overlies dark-laminated consolidated mud containing 50 wt % carbonate and plant debris. Hydrochemical measurements reveal a shift from oxic lake water with pH 9.0 to anoxic sediment pore water with pH 7.5. A decrease in SO42- with a concomitant increase in ΣH2S and NH4+ from 0 to 15 cm core depth indicates anaerobic heterotrophic decomposition, including sulfate reduction. The bacterial community composition reflects the zonation indicated by the pore water chemistry, with a distinct increase in fermentative taxa below 15 cm core depth. The water column is highly supersaturated with respect to (disordered) dolomite and calcite, whereas saturation indices of both minerals rapidly approach zero in the sediment. Notably, the relative proportions of different authigenic carbonate phases and their stoichiometric compositions remain constant with increasing core depth. Hence, evidence for Ca–Mg carbonate formation or ripening to dolomite is lacking within the sediment of Lake Neusiedl. As a consequence, precipitation of high-magnesium calcite (HMC) and protodolomite does not occur in association with anoxic sediment and sulfate-reducing conditions. Instead, analytical data for Lake Neusiedl suggest that authigenic HMC and protodolomite precipitate from the supersaturated, well-mixed aerobic water column. This observation supports an alternative concept to dolomite formation in anoxic sediments, comprising Ca–Mg carbonate precipitation in the water column under aerobic and alkaline conditions."],["dc.identifier.doi","10.5194/bg-17-2085-2020"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/17461"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/64457"],["dc.language.iso","en"],["dc.relation.issn","1726-4189"],["dc.title","Authigenic formation of Ca-Mg carbonates in the shallow alkaline Lake Neusiedl, Austria"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","163"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Scientific Data"],["dc.bibliographiccitation.volume","6"],["dc.contributor.author","von Hoyningen-Huene, Avril Jean Elisabeth"],["dc.contributor.author","Schneider, Dominik"],["dc.contributor.author","Fussmann, Dario"],["dc.contributor.author","Reimer, Andreas"],["dc.contributor.author","Arp, Gernot"],["dc.contributor.author","Daniel, Rolf"],["dc.date.accessioned","2019-09-24T08:10:48Z"],["dc.date.available","2019-09-24T08:10:48Z"],["dc.date.issued","2019"],["dc.description.abstract","We provide bacterial 16S rRNA community and hydrochemical data from water and sediments of Lake Neusiedl, Austria. The sediments were retrieved at 5 cm intervals from 30-40 cm push cores. The lake water community was recovered by filtration through a 3.0/0.2 µm filter sandwich. For 16S rRNA gene amplicon-based community profiling, DNA was extracted from the sediment and filters and the bacterial V3-V4 regions were amplified and sequenced using a MiSeq instrument (Illumina). The reads were quality-filtered and processed using open source bioinformatic tools, such as PEAR, cutadapt and VSEARCH. The taxonomy was assigned against the SILVA SSU NR 132 database. The bacterial community structure was visualised in relation to water and porewater chemistry data. The bacterial community in the water column is distinct from the sediment. The most abundant phyla in the sediment shift from Proteobacteria to Chloroflexota (formerly Chloroflexi). Ammonium and total alkalinity increase while sulphate concentrations in the porewater decrease. The provided data are of interest for studies targeting biogeochemical cycling in lake sediments."],["dc.identifier.doi","10.1038/s41597-019-0172-9"],["dc.identifier.pmid","31471542"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16400"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62453"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.eissn","2052-4463"],["dc.relation.issn","2052-4463"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Bacterial succession along a sediment porewater gradient at Lake Neusiedl in Austria"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.journal","Geomicrobiology Journal"],["dc.bibliographiccitation.lastpage","19"],["dc.contributor.author","Fussmann, Dario"],["dc.contributor.author","von Hoyningen-Huene, Avril J. E."],["dc.contributor.author","Reimer, Andreas"],["dc.contributor.author","Schneider, Dominik"],["dc.contributor.author","Karius, Volker"],["dc.contributor.author","Riechelmann, Sylvia"],["dc.contributor.author","Pederson, Chelsea"],["dc.contributor.author","Swart, Peter K."],["dc.contributor.author","Daniel, Rolf"],["dc.contributor.author","Arp, Gernot"],["dc.date.accessioned","2022-06-01T09:39:17Z"],["dc.date.available","2022-06-01T09:39:17Z"],["dc.date.issued","2022"],["dc.identifier.doi","10.1080/01490451.2022.2070689"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/108431"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-572"],["dc.relation.eissn","1521-0529"],["dc.relation.issn","0149-0451"],["dc.title","Decoupling of Pore Water Chemistry, Bacterial Community Profiles, and Carbonate Mud Diagenesis in a Land-Locked Pool on Aldabra (Seychelles, Indian Ocean)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e66662"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","PLoS ONE"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Schneider, Dominik"],["dc.contributor.author","Arp, Gernot"],["dc.contributor.author","Reimer, Andreas"],["dc.contributor.author","Reitner, Joachim"],["dc.contributor.author","Daniel, Rolf"],["dc.date.accessioned","2018-11-07T09:23:42Z"],["dc.date.available","2018-11-07T09:23:42Z"],["dc.date.issued","2013"],["dc.description.abstract","On the Kiritimati atoll, several lakes exhibit microbial mat-formation under different hydrochemical conditions. Some of these lakes trigger microbialite formation such as Lake 21, which is an evaporitic, hypersaline lake (salinity of approximately 170%). Lake 21 is completely covered with a thick multilayered microbial mat. This mat is associated with the formation of decimeter-thick highly porous microbialites, which are composed of aragonite and gypsum crystals. We assessed the bacterial and archaeal community composition and its alteration along the vertical stratification by large-scale analysis of 16S rRNA gene sequences of the nine different mat layers. The surface layers are dominated by aerobic, phototrophic, and halotolerant microbes. The bacterial community of these layers harbored Cyanobacteria (Halothece cluster), which were accompanied with known phototrophic members of the Bacteroidetes and Alphaproteobacteria. In deeper anaerobic layers more diverse communities than in the upper layers were present. The deeper layers were dominated by Spirochaetes, sulfate-reducing bacteria (Deltaproteobacteria), Chloroflexi (Anaerolineae and Caldilineae), purple non-sulfur bacteria (Alphaproteobacteria), purple sulfur bacteria (Chromatiales), anaerobic Bacteroidetes (Marinilabiacae), Nitrospirae (OPB95), Planctomycetes and several candidate divisions. The archaeal community, including numerous uncultured taxonomic lineages, generally changed from Euryarchaeota (mainly Halobacteria and Thermoplasmata) to uncultured members of the Thaumarchaeota (mainly Marine Benthic Group B) with increasing depth."],["dc.identifier.doi","10.1371/journal.pone.0066662"],["dc.identifier.isi","000320440500068"],["dc.identifier.pmid","23762495"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9155"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29644"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1932-6203"],["dc.rights","CC BY-NC 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by-nc/3.0"],["dc.title","Phylogenetic Analysis of a Microbialite-Forming Microbial Mat from a Hypersaline Lake of the Kiritimati Atoll, Central Pacific"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","316"],["dc.bibliographiccitation.issue","3-4"],["dc.bibliographiccitation.journal","Geomicrobiology Journal"],["dc.bibliographiccitation.lastpage","331"],["dc.bibliographiccitation.volume","32"],["dc.contributor.author","Schneider, Dominik"],["dc.contributor.author","Reimer, Andreas"],["dc.contributor.author","Hahlbrock, Angelina"],["dc.contributor.author","Arp, Gernot"],["dc.contributor.author","Daniel, Rolf"],["dc.date.accessioned","2018-11-07T09:59:36Z"],["dc.date.available","2018-11-07T09:59:36Z"],["dc.date.issued","2015"],["dc.description.abstract","Calcification of freshwater streams and the involvement of microorganisms in this process are still not fully understood. Here, we report on the metagenomic and metatranscriptomic analyses of bacterial community structures derived from an actively calcifying karst water creek biofilm and underlying tufa by employing next-generation sequencing technologies.The persistent and metabolically active bacterial communities were assessed by DNA-based and RNA-based 16S rRNA gene sequence analysis, respectively. We identified filamentous Cyanobacteria belonging to the Oscillatoriales as the predominant bacterial microorganisms in the biofilm. Cyanobacteria were accompanied by a high diversity of mainly aerobic members affiliated to different bacterial phyla. The second most abundant phylum was Proteobacteria, represented by the classes Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, and Deltaproteobacteria. In addition, Chloroflexi, Planctomycetes, Actinobacteria, Acidobacteria, Bacteroidetes, Spirochaetes, and Verrucomicrobia were present in higher abundances (>0.5%). Several of these phyla included potentially novel subgroups. The tufa stromatolite carbonate one centimeter below the surface exhibited a similar prokaryotic community as the superficial biofilm but showed a lower abundance of Cyanobacteria and a more diverse microbial community. We obtained insights into the in situ microbial metabolism by employing directed sequencing of enriched mRNA (cDNA) and subsequent taxonomic and functional analysis of biofilm-derived reads. High activities in photosynthesis, carbon and protein metabolism were indicated."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft [DFG-FOR 571, DA 374/5-2, AR335/5-3]"],["dc.identifier.doi","10.1080/01490451.2014.907376"],["dc.identifier.isi","000352349600011"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/37627"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1521-0529"],["dc.relation.issn","0149-0451"],["dc.title","Metagenomic and Metatranscriptomic Analyses of Bacterial Communities Derived From a Calcifying Karst Water Creek Biofilm and Tufa"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.contributor.author","Fussmann, Dario"],["dc.contributor.author","von Hoyningen-Huene, Avril Jean Elisabeth"],["dc.contributor.author","Reimer, Andreas"],["dc.contributor.author","Schneider, Dominik"],["dc.contributor.author","Babková, Hana"],["dc.contributor.author","Peticzka, Robert"],["dc.contributor.author","Maier, Andreas"],["dc.contributor.author","Arp, Gernot"],["dc.contributor.author","Daniel, Rolf"],["dc.contributor.author","Meister, Patrick"],["dc.date.accessioned","2020-04-29T06:14:29Z"],["dc.date.available","2020-04-29T06:14:29Z"],["dc.date.issued","2019"],["dc.description.abstract","Abstract. Despite advances regarding the microbial and organic-molecular impact on nucleation, the formation of dolomite in sedimentary environments is still incompletely understood. Since 1960, apparent dolomite formation has been reported from mud sediments of the shallow, oligohaline and alkaline Lake Neusiedl, Austria. To trace potential dolomite formation or diagenetic alteration processes in its deposits, lake water samples and sediment cores were analyzed with respect to sediment composition, hydrochemistry and bacterial community composition. Sediments comprise 20 cm of homogenous mud with 60 wt % carbonate, which overlie dark-laminated consolidated mud containing 50 wt % carbonate and plant debris. Hydrochemical measurements reveal a shift from oxic lake water with pH 9.0 to anoxic sediment pore water with pH 7.5. A decrease in SO₄²⁻ with a concomitant increase of ΣH₂S and NH₄⁺ from 0–15 cm core depth, indicates anaerobic heterotrophic decomposition, including sulfate reduction. The bacterial community composition reflects the zonation indicated by the pore water chemistry, with a distinct increase of fermentative taxa below 15 cm core depth. The water column is highly supersaturated with respect to (disordered) dolomite and calcite, whereas saturation indices of both minerals rapidly approach zero in the sediment. Notably, the relative proportions of different authigenic carbonate phases and their stoichiometric compositions remain constant with increasing core depth. Hence, evidence for Ca-Mg carbonate formation or ripening to dolomite is lacking within the sediment of Lake Neusiedl. As a consequence, precipitation of high-magnesium-calcite (HMC) and very-high-magnesium-calcite (VHMC) does not occur in association with anoxic sediment and sulfate reducing conditions. Instead, analytical data for Lake Neusiedl suggest that authigenic HMC and VHMC precipitate from the supersaturated, well-mixed aerobic water column. This observation supports an alternative concept to dolomite formation in anoxic sediments, comprising Ca-Mg carbonate precipitation in the water column under aerobic and alkaline conditions."],["dc.format.extent","33"],["dc.identifier.doi","10.5194/bg-2019-449"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/64467"],["dc.language.iso","en"],["dc.title","Authigenic formation of Ca-Mg carbonates in the shallow alkaline Lake Neusiedl, Austria"],["dc.type","preprint"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","4257"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Scientific Reports"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","von Hoyningen-Huene, Avril Jean Elisabeth"],["dc.contributor.author","Schneider, Dominik"],["dc.contributor.author","Fussmann, Dario"],["dc.contributor.author","Reimer, Andreas"],["dc.contributor.author","Arp, Gernot"],["dc.contributor.author","Daniel, Rolf"],["dc.date.accessioned","2022-04-01T10:00:46Z"],["dc.date.available","2022-04-01T10:00:46Z"],["dc.date.issued","2022"],["dc.description.abstract","The remote Aldabra Atoll, Seychelles, provides the rare opportunity to study bacterial communities in pristine carbonate sediments across an entire biome. The four sampled sites cover sand with high porewater exchange, bioturbated silt and mud with intermediate exchange, as well as a seasonally and episodically desiccated landlocked pool. As sediments harbour dead cells and environmental DNA alongside live cells, we used bacterial 16S rRNA gene and transcript analysis to distinguish between past and present inhabitants. Previously described laminated sediments mirroring past conditions in the Cerin, France could not be retrieved. Thus, the aim was adjusted to determine whether bacterial community composition and diversity follow typical geochemical zonation patterns at different locations of the atoll. Our data confirm previous observations that diversity decreases with depth. In the lagoon, the bacterial community composition changed from Pseudomonas dominating in the sand to diverse mixed surface and sulphate reduction zones in the anaerobic mud with strongly negative Eh. The latter correlated with high total alkalinity, ammonia, and total sulphide, alongside a decrease in SO42−/Cl− and high relative abundances of sulphate reducing (Halo-) Desulfovibrio, sulphur oxidizing Arcobacteraceae, photo(hetero)troph Cyanobacteria, Alphaproteobacteria, and fermenting Propionigenium. In contrast to expectations, deeper mud and pool sediments harboured high abundances of Halomonas or Alphaproteobacteria alongside high C/N and increased salinity. We believe that this atypical community shift may be driven by a change in the complexity of available organic matter."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2022"],["dc.identifier.doi","10.1038/s41598-022-07980-0"],["dc.identifier.pii","7980"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/105505"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-530"],["dc.relation.eissn","2045-2322"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","DNA- and RNA-based bacterial communities and geochemical zonation under changing sediment porewater dynamics on the Aldabra Atoll"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]