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

Koskinen, Kaisa; Hultman, Jenni; Paulín, Lars; Auvinen, Petri; Kankaanpää, Harri

doi:10.1111/j.1574-6941.2010.00987.x

Cited by 40 publications

(34 citation statements)

References 68 publications

(97 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is astonishing because metal reduction has not yet been shown in pure culture studies of members of any of these taxa. Sequences of Oceanospirillaceae and Colwellia are frequently recovered in molecular studies of marine waters and sea ice (DeLong et al, 1993;Gosink and Staley, 1995;Bowman et al, 1997;Brown and Bowman, 2001;Koskinen et al, 2011). One additional report is from a sediment (Borin et al, 2009), but judging from the eutrophic coastal setting, manganese reduction is not likely to be important there either.…”

Section: Resultsmentioning

confidence: 99%

Three manganese oxide-rich marine sediments harbor similar communities of acetate-oxidizing manganese-reducing bacteria

et al. 2012

View full text Add to dashboard Cite

Dissimilatory manganese reduction dominates anaerobic carbon oxidation in marine sediments with high manganese oxide concentrations, but the microorganisms responsible for this process are largely unknown. In this study, the acetate-utilizing manganese-reducing microbiota in geographically well-separated, manganese oxide-rich sediments from Gullmar Fjord (Sweden), Skagerrak (Norway) and Ulleung Basin (Korea) were analyzed by 16S rRNA-stable isotope probing (SIP). Manganese reduction was the prevailing terminal electron-accepting process in anoxic incubations of surface sediments, and even the addition of acetate stimulated neither iron nor sulfate reduction. The three geographically distinct sediments harbored surprisingly similar communities of acetateutilizing manganese-reducing bacteria: 16S rRNA of members of the genera Colwellia and Arcobacter and of novel genera within the Oceanospirillaceae and Alteromonadales were detected in heavy RNA-SIP fractions from these three sediments. Most probable number (MPN) analysis yielded up to 10 6 acetate-utilizing manganese-reducing cells cm À 3 in Gullmar Fjord sediment. A 16S rRNA gene clone library that was established from the highest MPN dilutions was dominated by sequences of Colwellia and Arcobacter species and members of the Oceanospirillaceae, supporting the obtained RNA-SIP results. In conclusion, these findings strongly suggest that (i) acetatedependent manganese reduction in manganese oxide-rich sediments is catalyzed by members of taxa (Arcobacter, Colwellia and Oceanospirillaceae) previously not known to possess this physiological function, (ii) similar acetate-utilizing manganese reducers thrive in geographically distinct regions and (iii) the identified manganese reducers differ greatly from the extensively explored iron reducers in marine sediments.

show abstract

Section: Resultsmentioning

confidence: 99%

Three manganese oxide-rich marine sediments harbor similar communities of acetate-oxidizing manganese-reducing bacteria

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Because of the salinity gradients, bacterial communities of the Baltic are influenced by freshwater bacterial species, especially in the northern areas of the Baltic and near river outflows (Vaatanen 1982, Holmfeldt et al 2009). Bacteriological variables of the Baltic Sea have been measured in general; for example, horizontal and vertical comparison of the bacterial counts and type (Vaatanen 1980, Gast & Gocke 1988, Koskinen et al 2011) and bacterial production (Heinanen 1991, Dahlgren et al 2010) have been studied. However, there has been very little previous research on bacteria inhabiting the SML of the Baltic Sea.…”

Section: Introductionmentioning

confidence: 99%

Comparison of sea surface microlayer and subsurface water bacterial communities in the Baltic Sea

Lindroos¹,

Szabo²,

Nikinmaa³

et al. 2011

Aquat. Microb. Ecol.

View full text Add to dashboard Cite

Sea surface microlayer (SML) and underlying subsurface water (SSW) bacterial communities from the Baltic Sea were studied using culturing, flow cytometry and terminal restriction fragment length polymorphism (T-RFLP). Dissolved organic matter (DOM) of water samples was determined using high performance liquid size-exclusion chromatography and by measuring dissolved organic carbon. Cadmium, copper, lead and mercury were also measured from the water samples. Two methods were compared for SML sampling: metal screen (MS) and polycarbonate membranes (PCM). All sampling sites were located in the Archipelago Sea off the southwest coast of Finland. The hypothesis was that because of its unique features, such as accumulation of nutrients and pollutants and being unshaded from UV-radiation, the SML would support a different bacterial community to that of SSW. T-RFLP profiles showed differences between the bacterial community compositions of SML and SSW at most sampling sites. In addition, temporal and sampling-site-dependent differences were observed. There were no significant differences in DOM in SML and SSW samples. In most cases, the number of bacteria was slightly higher in the SML than in SSW. No significant cytotoxicity was observed in any of the water samples. Since no temporal trends were obvious, our results suggest that, although bacterial communities in the SML Archipelago Sea differ to some extent from the ones living in SSW, SML is a dynamic environment where bacterial communities possibly develop originally from bacterioplankton and change over time.KEY WORDS: Sea surface microlayer · Bacterial community structure · T-RFLP · Dissolved organic matter Resale or republication not permitted without written consent of the publisher

show abstract

“…Some of them benefit from algae-derived organic matter (e.g., Teeling et al, 2012;Eronen-Rasimus et al, 2014) and can contribute to the decomposition of algal-derived organic matter during phytoplankton blooms (Teeling et al, 2012). Most of the Gammaproteobacteria in this study affiliated to Pseudomonas, which can occasionally be abundant in the Baltic Sea (Hagström et al, 2000;Koskinen et al, 2011). In addition, it is among the most abundant genera in bacterial isolates during Cyanobacterial blooms in lakes, rivers and the Baltic Sea (Berg et al, 2009).…”

Section: Phylogenetic Structure Of Bacterial Communities Degrading Blmentioning

confidence: 69%

Autochthonous Dissolved Organic Matter Drives Bacterial Community Composition during a Bloom of Filamentous Cyanobacteria

et al. 2016

View full text Add to dashboard Cite

The dynamics of dissolved organic matter (DOM) and the succession of bacterial community composition (BCC) were investigated during bloom of filamentous cyanobacteria in a mesocosm experiment conducted in the western Gulf of Finland, the Baltic Sea. The effects of labile dissolved organic carbon (glucose), inorganic nutrients (N and P) and large zooplankton (> 100 µm) on the DOM pool, bacterial production and the composition of bacterial communities were analyzed over a period of 10 days. In addition, the bioavailability of dissolved organic carbon (DOC) and its turnover by heterotrophic bacteria (biomass and respiration) were investigated in three 1-week bacterial bioassays. Heterotrophic bacteria rapidly utilized about 25-55% of the DOC released from the plankton community, thus assuming it to be highly labile DOC. More than half of the accumulating net DOC pool was degraded over 7 days, thus assuming it to be labile. In average, labile autochthonous DOC was degraded with bacterial growth efficiency of 25%. A distinct succession of bacterial communities accompanied the supply of autochthonous DOM, with the most prominent responses occurring in a few single phylotypes of the Delta-and Gammaproteobacterial classes. About 40% of the variation in the relative shares of dominant bacterial classes could be explained by changes in the functional groups of autotrophs. Inorganic nutrient treatment proved beneficial to Deltaproteobacteria and increased bacterial production over that of other mesocosms.

show abstract

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

Cited by 40 publications

References 68 publications

Three manganese oxide-rich marine sediments harbor similar communities of acetate-oxidizing manganese-reducing bacteria

Three manganese oxide-rich marine sediments harbor similar communities of acetate-oxidizing manganese-reducing bacteria

Comparison of sea surface microlayer and subsurface water bacterial communities in the Baltic Sea

Autochthonous Dissolved Organic Matter Drives Bacterial Community Composition during a Bloom of Filamentous Cyanobacteria

Contact Info

Product

Resources

About