Distribution, diversity, and activity of sulfate-reducing bacteria in the water column in Gek-Gel lake, Azerbaijan

Карначук, О. В.; Пименов, Н. В.; Yusupov, S. K.; Frank, Yulia A.; Puhakka, Jaakko A.; Ivanov, Mikhail

doi:10.1134/s0026261706010152

Cited by 32 publications

(19 citation statements)

References 15 publications

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“…In litter accumulation zone, in spite of the oxidative conditions in the near-bottom water, the abundance and activity of SRB were similar to those in profundal zone of stratified lakes with anaerobic hypolimnion (Krevs and Kucinskiene, 2012). Changes in the structural composition of organic matter might have a stronger influence on the succession of SRB physiological groups and their activity than on their amount (Karnachuk et al, 2006). Similarly, in the present study, a direct relationship between the amount of SRB and SR intensity was not observed.…”

Section: Datementioning

confidence: 79%

Influence of invasiveAcer negundoleaf litter on benthic microbial abundance and activity in the littoral zone of a temperate river in Lithuania

Krevš

Kucinskiene

2017

Knowl. Manag. Aquat. Ecosyst.

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-Riparian forests are known as important source of allochthonous organic matter entering to water ecosystems via fallen leaves. However, leaf litter, depending on their quality, may create different conditions for benthic microorganisms functioning in littoral zone of water bodies. In order to evaluate the impact of riparian invasive Acer negundo on littoral water zone of the River Neris (Lithuania), we performed physicochemical and microbiological investigations in bottom sediments of three different sites of the river. One sampling site was close by riparian A. negundo, another close by native Alnus glutinosa location and a third zone was near the shore without riparian vegetation. Content of nutrients in the littoral sediments differed between invasive and native trees leaf litter accumulation sites, while not always significantly. The highest microbial densities as well as benthic community respiratory activity (expressed as the rate of organic carbon mineralization) occurred in A. negundo leaves accumulation site. In sediments of this site, the most intensive anaerobic terminal organic carbon mineralization process À sulfate reduction and the highest concentration of hydrogen sulfide were also observed. Differences in the intensity of mineralization processes between sites suggest that the replacement of the riparian native species such as dominant A. glutinosa by invasive A. negundo with higher biodegradability leaves may induce local changes in organic matter processing in the littoral zone of the river. The increase of littoral bioproductivity in the accumulation zone of A. negundo leaf litter can occur due to the inflow of available organic matter and its intensive mineralization.Keywords: leaf litter / benthic microorganisms / river Résumé -Influence de la litière d'Acer negundo invasif sur l'abondance et l'activité microbienne benthique dans la zone littorale d'une rivière en Lituanie. Les forêts riveraines sont connues comme source importante de matière organique allochtone entrant dans les écosystèmes aquatiques via les feuilles tombées. Cependant, la litière, en fonction de sa qualité, peut créer différentes conditions pour que les microorganismes benthiques fonctionnent dans la zone littorale des masses d'eau. Afin d'évaluer l'impact de l'Acer negundo invasif dans la zone d'eau littorale de la rivière Neris (Lituanie), nous avons procédé à des recherches physico-chimiques et microbiologiques dans les sédiments de trois sites différents de la rivière. Un site d'échantillonnage était proche de A. negundo riverain, un autre proche de l'emplacement d'Alnus glutinosa indigène et une troisième zone était près d'une rive sans végétation riveraine. Les contenus en nutriments dans les sédiments du littoral différaient entre les sites d'accumulation de déchets de feuilles d'arbres envahissants et natifs, bien qu'ils ne soient pas toujours significativement différents. Les densités microbiennes les plus élevées ainsi que l'activité respiratoire de la communauté benthique (exprimée en taux de minéral...

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Section: Datementioning

confidence: 79%

Influence of invasiveAcer negundoleaf litter on benthic microbial abundance and activity in the littoral zone of a temperate river in Lithuania

Krevš

Kucinskiene

2017

Knowl. Manag. Aquat. Ecosyst.

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“…In these sand samples considered to be moderately or heavily contaminated by visual observations, total petroleum hydrocarbon concentrations were 1,900 and 4,500 mg kg Ϫ1 , respectively. Comparison to the source oil from the DH wellhead indicated substantial weathering in that the majority of detectable hydrocarbon compounds that remained resided in the higher-molecular-weight aliphatic (ϾC 16 ) and aromatic (ϾC 35 ) fractions (Table 3). When these samples were collected on 1 September, approximately 18 weeks after the onset of the DH spill, detectable polycyclic aromatic hydrocarbons and lighter aliphatics (C 6 to C 16 ) and aromatics (C 8 to C 21 ) were reduced to near the detection limit.…”

Section: Resultsmentioning

confidence: 99%

“…Heavier compounds such as larger alkanes (ϾC 21 ) have been shown to be degraded more slowly than corresponding lighter alkanes (ϽC 21 ). Thus, the ratio of lighter alkanes (C 6 to C 16 ) to heavier alkanes (C 16 to C 35 ) was used as a chemical proxy for the biodegradation process (59, 62). The ratio observed in oiled beach sands (0.025 to 0.16) was reduced by 1 to 2 orders of magnitude compared to the ratio observed in the DH source oil (2.79; see Table 3).…”

Section: Resultsmentioning

confidence: 99%

“…Marine sands act as efficient biocatalytic filters that play an important role in the biogeochemical cycles of carbon and nutrients in shallow Gulf waters (11,19,20). Marine sands in the Gulf are covered with biofilms of highly diverse microbial communities (30,53), and the bacterial abundance in sands exceeds that of the overlying seawater by orders of magnitude (7,35,38). Enhanced porewater exchange in highly permeable marine sands stimulates microbial metabolism through the delivery of growth substrates and the removal of waste products (7,15,28,29).…”

mentioning

confidence: 99%

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Hydrocarbon-Degrading Bacteria and the Bacterial Community Response in Gulf of Mexico Beach Sands Impacted by the Deepwater Horizon Oil Spill

Kostka

Prakash

Overholt

et al. 2011

Appl Environ Microbiol

756

504

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A significant portion of oil from the recent Deepwater Horizon (DH) oil spill in the Gulf of Mexico was transported to the shoreline, where it may have severe ecological and economic consequences. The objectives of this study were (i) to identify and characterize predominant oil-degrading taxa that may be used as model hydrocarbon degraders or as microbial indicators of contamination and (ii) to characterize the in situ response of indigenous bacterial communities to oil contamination in beach ecosystems. This study was conducted at municipal Pensacola Beach, FL, where chemical analysis revealed weathered oil petroleum hydrocarbon (C 8 to C 40 ) concentrations ranging from 3.1 to 4,500 mg kg ؊1 in beach sands. A total of 24 bacterial strains from 14 genera were isolated from oiled beach sands and confirmed as oil-degrading microorganisms. Isolated bacterial strains were primarily Gammaproteobacteria, including representatives of genera with known oil degraders (Alcanivorax, Marinobacter, Pseudomonas, and Acinetobacter). Sequence libraries generated from oiled sands revealed phylotypes that showed high sequence identity (up to 99%) to rRNA gene sequences from the oil-degrading bacterial isolates. The abundance of bacterial SSU rRNA gene sequences was ϳ10-fold higher in oiled (0.44 ؋ 10 7 to 10.2 ؋ 10 7 copies g ؊1 ) versus clean (0.024 ؋ 10 7 to 1.4 ؋ 10 7 copies g ؊1 ) sand. Community analysis revealed a distinct response to oil contamination, and SSU rRNA gene abundance derived from the genus Alcanivorax showed the largest increase in relative abundance in contaminated samples. We conclude that oil contamination from the DH spill had a profound impact on the abundance and community composition of indigenous bacteria in Gulf beach sands, and our evidence points to members of the Gammaproteobacteria (Alcanivorax, Marinobacter) and Alphaproteobacteria (Rhodobacteraceae) as key players in oil degradation there.

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“…The comparison with the litera ture data showed the rate of sulfate reduction in bot tom water to be comparable with that in BS of some oligotrophic lakes [6].…”

Section: Resultsmentioning

confidence: 64%

Seasonal biogeochemical and microbiological studies of small lakes in taiga zone of northwestern Russian (Arkhangelsk Province)

et al. 2012

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Abatract-The results of biogeochemical and microbiological studies of three small lakes in southwestern Arkhangelsk province are presented. The lakes differ in their morphometric characteristics, thermal and oxy gen regimes, and the extent of anthropogenic impact they experience. In the periods of summer and winter stratification, anaerobic water layers with higher phosphates, ammonium, and sulfide sulfur (hydrogen sul fide) are found to form in the bottom horizon of deep water zones of the lakes. The highest concentrations of sulfide sulfur (150-210 µg dm -3 ) were recorded in the shallow Beloe Lake during winter low water period, while in summer, sulfide concentration did not differ from those obtained in other lakes (~10 µg dm -3 ). The abundance of sulfate reducing bacteria in lake bottom sediments varied from 10 to 100000 cell cm -3 , and the rate of sulfate reduction process varied from 29 to 3746 µg S dm -3 day -1 . Seasonal variations were revealed in hydrogen sulfide distribution over the water column and in the rate of sulfate reduction process in the upper horizons of bottom sediments in the examined lakes.

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Distribution, diversity, and activity of sulfate-reducing bacteria in the water column in Gek-Gel lake, Azerbaijan

Cited by 32 publications

References 15 publications

Influence of invasiveAcer negundoleaf litter on benthic microbial abundance and activity in the littoral zone of a temperate river in Lithuania

Influence of invasiveAcer negundoleaf litter on benthic microbial abundance and activity in the littoral zone of a temperate river in Lithuania

Hydrocarbon-Degrading Bacteria and the Bacterial Community Response in Gulf of Mexico Beach Sands Impacted by the Deepwater Horizon Oil Spill

Seasonal biogeochemical and microbiological studies of small lakes in taiga zone of northwestern Russian (Arkhangelsk Province)

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