Microbial responses to mustard gas dumped in the Baltic Sea

Медведева, Н. Г.; Polyak, Yulia; Kankaanpää, Harri; Zaytseva, T. B.

doi:10.1016/j.marenvres.2009.04.007

Cited by 24 publications

(19 citation statements)

References 13 publications

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“…An exception was LL12_1 m, in which Rubritalea and Fluviicola were the two most common groups. Pseudomonas is a widespread genus, comprising hydrogen‐oxidizing aerobic bacteria (Madigan et al , 2003) associated with many abilities, ranging from degradation of a variety of macromolecules such as hydrocarbons and aromatic compounds (Holt et al , 1994) and even chemical warfare agents (Medvedeva et al , 2009). Based on earlier studies conducted in the northern Baltic Sea area, the dominance of Pseudomonas was unexpected.…”

Section: Resultsmentioning

confidence: 99%

“…The cyanobacterial communities in the region have been actively studied for decades (Sivonen et al , 1989a, b; Stal et al , 2003; Westman et al , 2003; Koskenniemi et al , 2007), and recently published studies have described the bacterial diversity at individual sites such as chemical weapons dumping sites as well as in littoral sediments (Edlund et al , 2006, 2008; Edlund & Jansson, 2008; Medvedeva et al , 2009). Thus, some information on bacterial abundance and activity in the Baltic Sea is available (Hagström et al , 2001) but only a few studies have focused on the composition, dynamics, and diversity of the bacterial community in general (Kaartokallio et al , 2005; Riemann et al , 2008).…”

Section: Introductionmentioning

confidence: 99%

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Spatially differing bacterial communities in water columns of the northern Baltic Sea

Koskinen

Hultman

Paulín

et al. 2010

FEMS Microbiology Ecology

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The Baltic Sea is a large, shallow, and strongly stratified brackish water basin. It suffers from eutrophication, toxic cyanobacterial blooms, and oxygen depletion, all of which pose a threat to local marine communities. In this study, the diversity and community structure of the northern Baltic Sea bacterial communities in the water column were, for the first time, thoroughly studied by 454 sequencing. The spring and autumn bacterial communities were one order of magnitude less diverse than those in recently studied oceanic habitats. Patchiness and strong stratification were clearly detectable; <1% of operational taxonomic units were shared among 11 samples. The community composition was more uniform horizontally (at a fixed depth) between different sites than vertically within one sampling site, implying that the community structure was affected by prevailing physical and hydrochemical conditions. Taxonomic affiliations revealed a total of 23 bacterial classes and 169 genera, while 5% of the sequences remained unclassified. The cyanobacteria accounted for <2% of the sequences, and potentially toxic cyanobacterial genera were essentially absent during the sampling seasons.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spatially differing bacterial communities in water columns of the northern Baltic Sea

Koskinen

Hultman

Paulín

et al. 2010

FEMS Microbiology Ecology

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“…Microbially induced corrosion (MIC) accounts for 20% of the total corrosion costs for the oil and gas industries [1, 2]. Additionally, chemical leaks from corroded waste containers cause health and environmental problems [3, 4]. Previous studies have primarily focused on MIC in sulfide-rich marine environments, where sulfate-reducing bacteria are predominantly causing corrosion [5].…”

Section: Introductionmentioning

confidence: 99%

Baltic Sea methanogens compete with acetogens for electrons from metallic iron

et al. 2019

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Microbially induced corrosion of metallic iron (Fe0)-containing structures is an environmental and economic hazard. Methanogens are abundant in low-sulfide environments and yet their specific role in Fe0 corrosion is poorly understood. In this study, Sporomusa and Methanosarcina dominated enrichments from Baltic Sea methanogenic sediments that were established with Fe0 as the sole electron donor and CO2 as the electron acceptor. The Baltic-Sporomusa was phylogenetically affiliated to the electroactive acetogen S. silvacetica. Baltic-Sporomusa adjusted rapidly to growth on H2. On Fe0, spent filtrate enhanced growth of this acetogen suggesting that it was using endogenous enzymes to retrieve electrons and produce acetate. Previous studies have proposed that acetate produced by acetogens can feed commensal acetoclastic methanogens such as Methanosarcina. However, Baltic-methanogens could not generate methane from acetate, plus the decrease or absence of acetogens stimulated their growth. The decrease in numbers of Sporomusa was concurrent with an upsurge in Methanosarcina and increased methane production, suggesting that methanogens compete with acetogens for electrons from Fe0. Furthermore, Baltic-methanogens were unable to use H2 (1.5 atm) for methanogenesis and were inhibited by spent filtrate additions, indicating that enzymatically produced H2 is not a favorable electron donor. We hypothesize that Baltic-methanogens retrieve electrons from Fe0 via a yet enigmatic direct electron uptake mechanism.

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“…The Golf of Bothnia of the Baltic Sea has been the dumping ground for chemical weapons and radionuclide waste sheltered by steel containers [1–3]. Thus, corrosion of metallic iron (Fe 0 ) structures is a health and environmental threat.…”

Section: Introductionmentioning

confidence: 99%

BalticMethanosarcinaandClostridiumcompete for electrons from metallic iron

Snoeyenbos-West

Löscher

Thamdrup

et al. 2019

Preprint

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13Microbial induced corrosion of steel structures, used for transport or storage of fuels, 14 chemical weapons or waste radionuclides, is an environmental and economic threat. 15In non-sulfidic environments, the exact role of methanogens in steel corrosion is 16 poorly understood. From the non-sulfidic, methanogenic sediments of the Baltic Sea 17 corrosive communities were enriched using exclusively Fe 0 as electron donor and 18 CO 2 as electron acceptor. Methane and acetate production were persistent for three 19 years of successive transfers. Methanosarcina and Clostridium were attached to the 20 Fe 0 , and dominated metagenome libraries. Since prior reports indicated 21Methanosarcina were merely commensals, consuming the acetate produced by 22 acetogens, we investigated whether these methanogens were capable of Fe 0 corrosion 23 without bacterial partners (inhibited by an antibiotic cocktail). Unassisted, 24 methanogens corroded Fe 0 to Fe 2+ at similar rates to the mixed community. 25 Surprisingly, in the absence of competitive bacteria, Baltic-Methanosarcina produced 26 six times more methane than they did in the mixed community. This signifies that 27Baltic-Methanosarcina achieved better corrosion alone, exclusive of an operative 28 bacterial partner. Our results also show that together with acetogens, Methanosarcina 29 interact competitively to retrieve electrons from Fe 0 rather than as commensals as 30 previously assumed. 31 32

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Microbial responses to mustard gas dumped in the Baltic Sea

Cited by 24 publications

References 13 publications

Spatially differing bacterial communities in water columns of the northern Baltic Sea

Spatially differing bacterial communities in water columns of the northern Baltic Sea

Baltic Sea methanogens compete with acetogens for electrons from metallic iron

BalticMethanosarcinaandClostridiumcompete for electrons from metallic iron

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