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Book ; Online: Document with supplementary information, supplementary data to: Schauer, Regina; Røy, Hans; Augustin, Nico; Gennerich, Hans-Hermann; Peters, Marc; Wenzhöfer, Frank; Amann, Rudolf; Meyerdierks, Anke (2011): Bacterial sulfur cycling shapes microbial communities in surface sediments of an ultramafic hydrothermal vent field. Environmental Microbiology, 13(10), 2633-2648

Schauer, Regina / Amann, Rudolf / Augustin, Nico / Gennerich, Hans-Hermann / Meyerdierks, Anke / Peters, Marc / Røy, Hans / Wenzhöfer, Frank

2012

Abstract: The ultramafic-hosted Logatchev hydrothermal field (LHF) is characterized by vent fluids, which are enriched in dissolved hydrogen and methane compared with fluids from basalt-hosted systems. Thick sediment layers in LHF are partly covered by ... ...

Abstract	The ultramafic-hosted Logatchev hydrothermal field (LHF) is characterized by vent fluids, which are enriched in dissolved hydrogen and methane compared with fluids from basalt-hosted systems. Thick sediment layers in LHF are partly covered by characteristic white mats. In this study, these sediments were investigated in order to determine biogeochemical processes and key organisms relevant for primary production. Temperature profiling at two mat-covered sites showed a conductive heating of the sediments. Elemental sulfur was detected in the overlying mat and metal-sulfides in the upper sediment layer. Microprofiles revealed an intensive hydrogen sulfide flux from deeper sediment layers. Fluorescence in situ hybridization showed that filamentous and vibrioid, Arcobacter-related Epsilonproteobacteria dominated the overlying mats. This is in contrast to sulfidic sediments in basalt-hosted fields where mats of similar appearance are composed of large sulfur-oxidizing Gammaproteobacteria. Epsilonproteobacteria (7- 21%) and Deltaproteobacteria (20-21%) were highly abundant in the surface sediment layer. The physiology of the closest cultivated relatives, revealed by comparative 16S rRNA sequence analysis, was characterized by the capability to metabolize sulfur com- ponents. High sulfate reduction rates as well as sulfide depleted in 34S further confirmed the importance of the biogeochemical sulfur cycle. In contrast, methane was found to be of minor relevance for microbial life in mat-covered surface sediments. Our data indicate that in conductively heated surface sediments microbial sulfur cycling is the driving force for bacterial biomass production although ultramafic- hosted systems are characterized by fluids with high levels of dissolved methane and hydrogen.
Language	English
Dates of publication	2012-9999
Size	Online-Ressource
Publisher	PANGAEA - Data Publisher for Earth & Environmental Science
Publishing place	Bremen/Bremerhaven
Document type	Book ; Online
Note	This dataset is supplement to doi:10.1111/j.1462-2920.2011.02530.x
DOI	10.1594/PANGAEA.775499
Database	Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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Article: Tracing Mastitis Pathogens-Epidemiological Investigations of a

Schauer, Bernhard / Wald, Regina / Urbantke, Verena / Loncaric, Igor / Baumgartner, Martina

Animals : an open access journal from MDPI

2021 Volume 11, Issue 2

Abstract: The present study describes an outbreak ... ...

Abstract	The present study describes an outbreak of
Language	English
Publishing date	2021-01-22
Publishing country	Switzerland
Document type	Journal Article
ISSN	2076-2615
ISSN	2076-2615
DOI	10.3390/ani11020279
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Tracing Mastitis Pathogens—Epidemiological Investigations of a Pseudomonas aeruginosa Mastitis Outbreak in an Austrian Dairy Herd

Bernhard Schauer / Regina Wald / Verena Urbantke / Igor Loncaric / Martina Baumgartner

Animals, Vol 11, Iss 2, p

2021 Volume 279

Abstract: The present study describes an outbreak of Pseudomonas (P.) aeruginosa mastitis in a 20-cow dairy herd where throughout genotyping of isolates reusable udder towels were identified as the source of infection. Sampling of cows during three herd surveys ... ...

Abstract	The present study describes an outbreak of Pseudomonas (P.) aeruginosa mastitis in a 20-cow dairy herd where throughout genotyping of isolates reusable udder towels were identified as the source of infection. Sampling of cows during three herd surveys and bacteriological culturing showed that P. aeruginosa was isolated from nine cows with a total of 13 infected quarters. Mastitis occurred as mild clinical or subclinical infection. P. aeruginosa was additionally isolated from a teat disinfectant solution, containing N-(3-aminopropyl)-N-dodécylpropane-1,3-diamine 1 as active component, and microfiber towels used for pre-milking teat preparation. Disc diffusion antimicrobial resistance testing revealed that all isolates were susceptible to piperacillin, piperacillin-tazobactam, ceftazidime, cefepime, aztreonam, imipenem, meropenem, tobramycin, amikacin, and ciprofloxacin. Thirty-two isolates of milk samples and 22 randomly selected isolates of one udder towel and of the teat disinfectant solution were confirmed as P. aeruginosa with matrix-assisted laser desorption, ionization time-of-flight mass spectrometry (MALDI Tof MS). Isolates were further characterized with rep-PCR and randomly amplified polymorphic DNA (RAPD) as well as with multiple locus variable-number tandem repeat analysis (MLVA). Results obtained in this study suggested that one single strain was responsible for the whole outbreak. The transmission occurred throughout a contaminated teat cleaning solution as a source of infection. The farmer was advised to change udder-preparing routine and to cull infected cows.
Keywords	Pseudomonas aeruginosa ; mastitis ; transmission route ; udder cleaning microfiber towels ; MLVA ; Veterinary medicine ; SF600-1100 ; Zoology ; QL1-991
Subject code	630
Language	English
Publishing date	2021-01-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Book ; Online ; Thesis: Diversity and function of microbial communities in sediments from different deep-sea habitats

Schauer, Regina [Verfasser]

2010

Author's details	vorgelegt von Regina Schauer
Keywords	Biowissenschaften, Biologie ; Life Science, Biology
Subject code	sg570
Language	English
Document type	Book ; Online ; Thesis
Database	Digital theses on the web

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Article ; Online: Bacterial diversity and biogeography in deep-sea surface sediments of the South Atlantic Ocean.

Schauer, Regina / Bienhold, Christina / Ramette, Alban / Harder, Jens

The ISME journal

2010 Volume 4, Issue 2, Page(s) 159–170

Abstract: Microbial biogeographic patterns in the deep sea depend on the ability of microorganisms to disperse. One possible limitation to microbial dispersal may be the Walvis Ridge that separates the Antarctic Lower Circumpolar Deep Water from the North Atlantic ...

Abstract	Microbial biogeographic patterns in the deep sea depend on the ability of microorganisms to disperse. One possible limitation to microbial dispersal may be the Walvis Ridge that separates the Antarctic Lower Circumpolar Deep Water from the North Atlantic Deep Water. We examined bacterial communities in three basins of the eastern South Atlantic Ocean to determine diversity and biogeography of bacterial communities in deep-sea surface sediments. The analysis of 16S ribosomal RNA (rRNA) gene clone libraries in each basin revealed a high diversity, representing 521 phylotypes with 98% identity in 1051 sequences. Phylotypes affiliated with Gammaproteobacteria, Deltaproteobacteria and Acidobacteria were present in all three basins. The distribution of these shared phylotypes seemed to be influenced neither by the Walvis Ridge nor by different deep water masses, suggesting a high dispersal capability, as also indicated by low distance-decay relationships. However, the total bacterial diversity showed significant differences between the basins, based on 16S rRNA gene sequences as well as on terminal restriction fragment length polymorphism fingerprints. Noticeably, both geographic distance and environmental heterogeneity influenced bacterial diversity at intermediate (10-3000 km) and large scales (>3000 km), indicating a complex interplay of local contemporary environmental effects and dispersal limitation.
MeSH term(s)	Atlantic Ocean ; Bacteria/classification ; Bacteria/genetics ; Bacteria/isolation & purification ; DNA, Bacterial/genetics ; DNA, Ribosomal/genetics ; Deltaproteobacteria/classification ; Deltaproteobacteria/genetics ; Deltaproteobacteria/isolation & purification ; Gammaproteobacteria/classification ; Gammaproteobacteria/genetics ; Gammaproteobacteria/isolation & purification ; Geologic Sediments/microbiology ; Phylogeny ; RNA, Ribosomal, 16S/genetics ; Seawater/microbiology
Chemical Substances	DNA, Bacterial ; DNA, Ribosomal ; RNA, Ribosomal, 16S
Language	English
Publishing date	2010-02
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2406536-5
ISSN	1751-7370 ; 1751-7362
ISSN (online)	1751-7370
ISSN	1751-7362
DOI	10.1038/ismej.2009.106
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Rapid and sensitive quantification of Vibrio cholerae and Vibrio mimicus cells in water samples by use of catalyzed reporter deposition fluorescence in situ hybridization combined with solid-phase cytometry.

Schauer, Sonja / Sommer, Regina / Farnleitner, Andreas H / Kirschner, Alexander K T

Applied and environmental microbiology

2012 Volume 78, Issue 20, Page(s) 7369–7375

Abstract: A new protocol for rapid, specific, and sensitive cell-based quantification of Vibrio cholerae/Vibrio mimicus in water samples was developed. The protocol is based on catalyzed reporter deposition fluorescence in situ hybridization (CARD-FISH) in ... ...

Abstract	A new protocol for rapid, specific, and sensitive cell-based quantification of Vibrio cholerae/Vibrio mimicus in water samples was developed. The protocol is based on catalyzed reporter deposition fluorescence in situ hybridization (CARD-FISH) in combination with solid-phase cytometry. For pure cultures, we were able to quantify down to 6 V. cholerae cells on one membrane with a relative precision of 39% and down to 12 cells with a relative precision of 17% after hybridization with the horseradish peroxidase (HRP)-labeled probe Vchomim1276 (specific for V. cholerae and V. mimicus) and signal amplification. The corresponding position of the probe on the 16S rRNA is highly accessible even when labeled with HRP. For the first time, we were also able to successfully quantify V. cholerae/V. mimicus via solid-phase cytometry in extremely turbid environmental water samples collected in Austria. Cell numbers ranged from 4.5 × 10(1) cells ml(-1) in the large saline lake Neusiedler See to 5.6 × 10(4) cells ml(-1) in an extremely turbid shallow soda lake situated nearby. We therefore suggest CARD-FISH in combination with solid-phase cytometry as a powerful tool to quantify V. cholerae/V. mimicus in ecological studies as well as for risk assessment and monitoring programs.
MeSH term(s)	Austria ; Bacterial Load/methods ; Horseradish Peroxidase/metabolism ; Image Cytometry/methods ; In Situ Hybridization, Fluorescence/methods ; Oligonucleotide Probes/chemistry ; Oligonucleotide Probes/genetics ; Sensitivity and Specificity ; Staining and Labeling ; Time Factors ; Vibrio cholerae/isolation & purification ; Vibrio mimicus/isolation & purification ; Water Microbiology
Chemical Substances	Oligonucleotide Probes ; Horseradish Peroxidase (EC 1.11.1.-)
Language	English
Publishing date	2012-08-10
Publishing country	United States
Document type	Evaluation Study ; Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	223011-2
ISSN	1098-5336 ; 0099-2240
ISSN (online)	1098-5336
ISSN	0099-2240
DOI	10.1128/AEM.02190-12
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Article ; Online: Cable Bacteria Control Iron-Phosphorus Dynamics in Sediments of a Coastal Hypoxic Basin.

Sulu-Gambari, Fatimah / Seitaj, Dorina / Meysman, Filip J R / Schauer, Regina / Polerecky, Lubos / Slomp, Caroline P

Environmental science & technology

2016 Volume 50, Issue 3, Page(s) 1227–1233

Abstract: Phosphorus is an essential nutrient for life. The release of phosphorus from sediments is critical in sustaining phytoplankton growth in many aquatic systems and is pivotal to eutrophication and the development of bottom water hypoxia. Conventionally, ... ...

Abstract	Phosphorus is an essential nutrient for life. The release of phosphorus from sediments is critical in sustaining phytoplankton growth in many aquatic systems and is pivotal to eutrophication and the development of bottom water hypoxia. Conventionally, sediment phosphorus release is thought to be controlled by changes in iron oxide reduction driven by variations in external environmental factors, such as organic matter input and bottom water oxygen. Here, we show that internal shifts in microbial communities, and specifically the population dynamics of cable bacteria, can also induce strong seasonality in sedimentary iron-phosphorus dynamics. Field observations in a seasonally hypoxic coastal basin demonstrate that the long-range electrogenic metabolism of cable bacteria leads to a dissolution of iron sulfides in winter and spring. Subsequent oxidation of the mobilized ferrous iron with manganese oxides results in a large stock of iron-oxide-bound phosphorus below the oxic zone. In summer, when bottom water hypoxia develops and cable bacteria are undetectable, the phosphorus associated with these iron oxides is released, strongly increasing phosphorus availability in the water column. Future research should elucidate whether formation of iron-oxide-bound phosphorus driven by cable bacteria, as observed in this study, contributes to the seasonality in iron-phosphorus cycling in aquatic sediments worldwide.
MeSH term(s)	Bacteria/metabolism ; Eutrophication ; Ferric Compounds/chemistry ; Ferric Compounds/metabolism ; Ferrous Compounds/chemistry ; Ferrous Compounds/metabolism ; Geologic Sediments/chemistry ; Geologic Sediments/microbiology ; Iron/analysis ; Iron/metabolism ; Netherlands ; Oxidation-Reduction ; Oxygen/metabolism ; Phosphorus/analysis ; Phosphorus/metabolism ; Population Dynamics ; Seasons ; Water/chemistry
Chemical Substances	Ferric Compounds ; Ferrous Compounds ; Water (059QF0KO0R) ; ferric oxide (1K09F3G675) ; Phosphorus (27YLU75U4W) ; Iron (E1UOL152H7) ; Oxygen (S88TT14065) ; ferrous sulfide (TH5J4TUX6S)
Language	English
Publishing date	2016-02-02
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1520-5851
ISSN (online)	1520-5851
DOI	10.1021/acs.est.5b04369
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Impact of Seasonal Hypoxia on Activity and Community Structure of Chemolithoautotrophic Bacteria in a Coastal Sediment.

Lipsewers, Yvonne A / Vasquez-Cardenas, Diana / Seitaj, Dorina / Schauer, Regina / Hidalgo-Martinez, Silvia / Sinninghe Damsté, Jaap S / Meysman, Filip J R / Villanueva, Laura / Boschker, Henricus T S

Applied and environmental microbiology

2017 Volume 83, Issue 10

Abstract: Seasonal hypoxia in coastal systems drastically changes the availability of electron acceptors in bottom water, which alters the sedimentary reoxidation of reduced compounds. However, the effect of seasonal hypoxia on the chemolithoautotrophic community ... ...

Abstract	Seasonal hypoxia in coastal systems drastically changes the availability of electron acceptors in bottom water, which alters the sedimentary reoxidation of reduced compounds. However, the effect of seasonal hypoxia on the chemolithoautotrophic community that catalyzes these reoxidation reactions is rarely studied. Here, we examine the changes in activity and structure of the sedimentary chemolithoautotrophic bacterial community of a seasonally hypoxic saline basin under oxic (spring) and hypoxic (summer) conditions. Combined 16S rRNA gene amplicon sequencing and analysis of phospholipid-derived fatty acids indicated a major temporal shift in community structure. Aerobic sulfur-oxidizing
MeSH term(s)	Bacteria/classification ; Bacteria/genetics ; Bacteria/isolation & purification ; Bacteria/metabolism ; Biodiversity ; Chemoautotrophic Growth ; Geologic Sediments/chemistry ; Geologic Sediments/microbiology ; Oxidation-Reduction ; Oxygen/analysis ; Oxygen/metabolism ; Phylogeny ; Seasons ; Sulfur/metabolism
Chemical Substances	Sulfur (70FD1KFU70) ; Oxygen (S88TT14065)
Language	English
Publishing date	2017-05-01
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	223011-2
ISSN	1098-5336 ; 0099-2240
ISSN (online)	1098-5336
ISSN	0099-2240
DOI	10.1128/AEM.03517-16
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Article ; Online: Visualization of candidate division OP3 cocci in limonene-degrading methanogenic cultures.

Rotaru, Amelia-Elena / Schauer, Regina / Probian, Christina / Mussmann, Marc / Harder, Jens

Journal of microbiology and biotechnology

2012 Volume 22, Issue 4, Page(s) 457–461

Abstract: Members of candidate division OP3 were detected in 16S rRNA gene clone libraries from methanogenic enrichment cultures that utilized limonene as a carbon and energy source. We developed probes for the visualization of OP3 cells. In situ hybridization ... ...

Abstract	Members of candidate division OP3 were detected in 16S rRNA gene clone libraries from methanogenic enrichment cultures that utilized limonene as a carbon and energy source. We developed probes for the visualization of OP3 cells. In situ hybridization experiments with newly designed OP3-specific probes [OP3-565 and Eub-338(VI)] revealed abundant small OP3 cocci attached to larger cells. Syntrophic Deltaproteobacteria, OP3 cells, and methanogens affiliating with Methanoculleus and Methanosaeta formed the limonenedegrading community.
MeSH term(s)	Bacteria/classification ; Bacteria/genetics ; Bacteria/metabolism ; Cyclohexenes/metabolism ; DNA, Bacterial/genetics ; DNA, Ribosomal/genetics ; Limonene ; Methane/metabolism ; Molecular Sequence Data ; Phylogeny ; RNA, Ribosomal, 16S/genetics ; Terpenes/metabolism
Chemical Substances	Cyclohexenes ; DNA, Bacterial ; DNA, Ribosomal ; RNA, Ribosomal, 16S ; Terpenes ; Limonene (9MC3I34447) ; Methane (OP0UW79H66)
Language	English
Publishing date	2012-02-10
Publishing country	Korea (South)
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1738-8872
ISSN (online)	1738-8872
DOI	10.4014/jmb.1110.10055
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Cable Bacteria Control IronâPhosphorus Dynamics in Sediments of a Coastal Hypoxic Basin

Sulu-Gambari, Fatimah / Meysman Filip J. R / Polerecky Lubos / Schauer Regina / Seitaj Dorina / Slomp Caroline P

Environmental Science & Technology. 2016 Feb. 02, v. 50, no. 3

2016

Abstract	Phosphorus is an essential nutrient for life. The release of phosphorus from sediments is critical in sustaining phytoplankton growth in many aquatic systems and is pivotal to eutrophication and the development of bottom water hypoxia. Conventionally, sediment phosphorus release is thought to be controlled by changes in iron oxide reduction driven by variations in external environmental factors, such as organic matter input and bottom water oxygen. Here, we show that internal shifts in microbial communities, and specifically the population dynamics of cable bacteria, can also induce strong seasonality in sedimentary ironâphosphorus dynamics. Field observations in a seasonally hypoxic coastal basin demonstrate that the long-range electrogenic metabolism of cable bacteria leads to a dissolution of iron sulfides in winter and spring. Subsequent oxidation of the mobilized ferrous iron with manganese oxides results in a large stock of iron-oxide-bound phosphorus below the oxic zone. In summer, when bottom water hypoxia develops and cable bacteria are undetectable, the phosphorus associated with these iron oxides is released, strongly increasing phosphorus availability in the water column. Future research should elucidate whether formation of iron-oxide-bound phosphorus driven by cable bacteria, as observed in this study, contributes to the seasonality in ironâphosphorus cycling in aquatic sediments worldwide.
Keywords	anaerobic conditions ; bacteria ; basins ; eutrophication ; iron ; iron oxides ; manganese oxides ; metabolism ; microbial communities ; organic matter ; oxidation ; oxygen ; phosphorus ; phytoplankton ; population dynamics ; sediments ; spring ; sulfides ; summer ; winter
Language	English
Dates of publication	2016-0202
Size	p. 1227-1233.
Publishing place	American Chemical Society
Document type	Article
ISSN	1520-5851
DOI	10.1021%2Facs.est.5b04369
Database	NAL-Catalogue (AGRICOLA)

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