WorldCat Identities

Treude, Tina

Overview
Works: 9 works in 14 publications in 2 languages and 35 library holdings
Roles: Author, dgs, Creator
Publication Timeline
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Most widely held works by Tina Treude
Anaerobic oxidation of methane in marine sediments by Tina Treude( )

5 editions published between 2003 and 2004 in English and held by 22 WorldCat member libraries worldwide

Anaerobic methane oxidation, sulfate reduction, flux, ANME, sulfide, gas hydrate, chemosynthesis, cold seep. - Anaerobic oxidation of methane (AOM) is a microbial process in marine sediments, by which sulfate is used as electron acceptor. The current hypothesis is that AOM is mediated by a consortium of methanotrophic archaea and sulfate-reducing bacteria. Research over the past 20 years has shown that AOM retains most of the methane in the sediment. In this thesis, the distribution and relevance of AOM in marine habitats with different methane fluxes was studied. Selected sediments and microbial mats were investigated to explain some of the factors regulating AOM. 1) At Hydrate Ridge, where fossil gases rise and gas hydrates dissociate in the surface sediment, AOM reveals some of the highest rates ever found in marine sediments and is characterized by high heterogeneity. 2) The sediments of Eckernförde Bay are characterized by high methane concentrations due to in situ methane production in organic-rich sediments. We were able to demonstrate that AOM is subject to seasonal changes. The organisms that mediate AOM in Eckernförde Bay
Untersuchungen zu Gemeinschaftsstruktur und Energiehaushalt ausgewählter Aasfresser der Tiefsee des Arabischen Meeres by Tina Treude( Book )

1 edition published in 1999 in German and held by 2 WorldCat member libraries worldwide

Biogeochemical processes at marine whale falls and methane seeps = Biogeochemische Prozesse an marinen Walkadavern und Methanquellen by David Vardeh( Book )

1 edition published in 2011 in English and held by 2 WorldCat member libraries worldwide

Kleine Lebewesen mit grosser Bedeutung : wie Mikroben Prozesse im Meeresboden beeinflussen ; Begleitheft zum Vortrag [am 24. November 2010] by Tina Treude( Book )

2 editions published in 2010 in German and held by 2 WorldCat member libraries worldwide

Von Aufstieg zu Aufstieg 16 Jahre SFS( Book )

1 edition published in 2012 in German and held by 2 WorldCat member libraries worldwide

Isotopic signature of specific biomarkers derived from anaerobic methanotrophic archaea (ANME groups) and [BR]ulphate-reducing bacteria (SRB) at different cold seep provinces, supplementary data to: Elvert, Marcus; Hopmans, Ellen C; Treude, Tina; Boetius, Antje; Suess, Erwin (2005): Spatial variations of methanotrophic consortia at cold methane seeps: Implications from a high-resolution molecular and isotopic approach. Geobiology, 3(3), 195-209 by Marcus Elvert( )

in English and held by 2 WorldCat member libraries worldwide

Anaerobic methane-oxidizing microbial communities in sediments at cold methane seeps are important factors in controlling methane emission to the ocean and atmosphere. Here, we investigated the distribution and carbon isotopic signature of specific biomarkers derived from anaerobic methanotrophic archaea (ANME groups) and sulphate-reducing bacteria (SRB) responsible for the anaerobic oxidation of methane (AOM) at different cold seep provinces of Hydrate Ridge, Cascadia margin. The special focus was on their relation to in situ cell abundances and methane turnover. In general, maxima in biomarker abundances and minima in carbon isotope signatures correlated with maxima in AOM and sulphate reduction as well as with consortium biomass. We found ANME-2a/DSS aggregates associated with high abundances of sn-2,3-di-O-isoprenoidal glycerol ethers (archaeol, sn-2-hydroxyarchaeol) and specific bacterial fatty acids (C16:1omega5c, cyC17:0omega5,6) as well as with high methane fluxes (Beggiatoa site). The low to medium flux site (Calyptogena field) was dominated by ANME-2c/DSS aggregates and contained less of both compound classes but more of AOM-related glycerol dialkyl glycerol tetraethers (GDGTs). ANME-1 archaea dominated deeper sediment horizons at the Calyptogena field where sn-1,2-di-O-alkyl glycerol ethers (DAGEs), archaeol, methyl-branched fatty acids (ai-C15:0, i-C16:0, ai-C17:0), and diagnostic GDGTs were prevailing. AOM-specific bacterial and archaeal biomarkers in these sediment strata generally revealed very similar d13C-values of around -100 per mill. In ANME-2-dominated sediment sections, archaeal biomarkers were even more 13C-depleted (down to -120 per mill), whereas bacterial biomarkers were found to be likewise 13C-depleted as in ANME-1-dominated sediment layers (d13C: -100 per mill). The zero flux site (Acharax field), containing only a few numbers of ANME-2/DSS aggregates, however, provided no specific biomarker pattern. Deeper sediment sections (below 20 cm sediment depth) from Beggiatoa covered areas which included solid layers of methane gas hydrates contained ANME-2/DSS typical biomarkers showing subsurface peaks combined with negative shifts in carbon isotopic compositions. The maxima were detected just above the hydrate layers, indicating that methane stored in the hydrates may be available for the microbial community. The observed variations in biomarker abundances and 13C-depletions are indicative of multiple environmental and physiological factors selecting for different AOM consortia (ANME-2a/DSS, ANME-2c/DSS, ANME-1) along horizontal and vertical gradients of cold seep settings
Benthic nitrogen fixation in oxygen minimum zones by Jessica Gier( Book )

1 edition published in 2016 in English and held by 1 WorldCat member library worldwide

Toxic effects of lab-grade butyl rubber stoppers on aerobic methane oxidation( )

1 edition published in 2015 in English and held by 1 WorldCat member library worldwide

Abstract: Methods for measuring aerobic methane oxidation (MOx) rates in aquatic environments are often based on the incubation of water samples, during which the consumption of methane (CH4) is monitored. Typically, incubation vessels are sealed with butyl rubber because these elastomers are essentially impermeable for gases. We report on the potential toxicity of five different commercially available, lab-grade butyl stoppers on MOx activity in samples from marine and lacustrine environments. MOx rates in incubations sealed with non-halogenated butyl were> 50% lower compared to parallel incubations with halogenated butyl rubber stoppers, suggesting toxic effects associated with the use of the non-halogenated butyl type. Aqueous extracts of non-halogenated butyl rubber were contaminated with high amounts of various organic compounds including potential bactericides such as benzyltoluenes and phenylalkanes. Comparably small amounts of organic contaminants were liberated from the halogenated butyl rubber stoppers but only two halogenated stopper types were found that did not seem to leach any organics into the incubation medium. Furthermore, the non-halogenated and two types of the halogenated butyl elastomers additionally leached comparably high amounts of zinc. While the source of the apparent toxicity with the use of the non-halogenated rubber stoppers remains elusive, our results indicate that leaching of contaminants from some butyl rubber stoppers can severely interfere with the activity of MOx communities, highlighting the importance of testing rubber stoppers for their respective contamination potential. The impact of leachates from butyl rubber on the assessment of biogeochemical reaction rates other than MOx seems likely but needs to be verified
Environmental controls on marine methane oxidation : from deep-sea brines to shallow coastal systems by Lea Irina Steinle( Book )

1 edition published in 2016 in English and held by 1 WorldCat member library worldwide

 
Audience Level
0
Audience Level
1
  Kids General Special  
Audience level: 0.91 (from 0.89 for Anaerobic ... to 0.96 for Von Aufsti ...)

Alternative Names
Tina Treude deutsche Biologin und Hochschullehrerin

Tina Treude Duits professor

Tina Treude German professor

Languages
English (10)

German (4)