Bacterial biomass and activity in the marginal ice zone of the northern Barents Sea

Tammert, Helen; Olli, Kalle; Sturluson, Maria; Hodal, Helene

doi:10.1016/j.dsr2.2008.05.011

Cited by 14 publications

(13 citation statements)

References 66 publications

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“…In the open part of the Arctic Ocean and the Canadian Arctic, the quantitative estimates for bacterial plankton were still lower: their number was not higher than 670000 cells/ml and the biomass did not exceed 13 mg C/m 3 [6,14]. It was previously reported for the Barents Sea that the abundance of bacteria tended to decrease from the south to the north [2], this observation, however, has not been confirmed by an analysis of published works [9,14,15,17] and our data. The irregular distribution of bacteria in the Arctic regions considered (Greenland and Barents Sea, Canadian Arctic and Arctic Ocean) can be attrib uted not only to differences in ambient conditions, but also to methods of sampling: water samples were taken in the deep sea regions from greater depths [6,14], which could lead to relatively low values for the num ber of microorganisms.…”

Section: Discussioncontrasting

confidence: 66%

“…In the waters of Western Spitsbergen Is., the biomass of bacterial plankton was comparable to that observed in the northwestern areas of the Barents Sea and adjoining waters of the Arctic Ocean. In particular, in the sum mers of 2003-2004, the biomass of bacteria in these areas ranged from 8.6 to 30.9 mg C/m 3 [15], which gives an average value of 16 µg C/m 3 [15] (the average estimate was calculated by the authors of this article). The last estimate is slightly higher than in our study (see table).…”

Section: Discussionmentioning

confidence: 99%

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Summer bacterio- and zooplankton in coastal waters of Svalbard

Dvoretsky¹,

Venger²,

Makarevich³

et al. 2012

Russ J Mar Biol

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The distribution of bacterio and zooplankton was studied in West Spitsbergen (Svalbard) coastal waters in August 2009. The bacterial abundance and biomass varied from 110 to 3360 × 10 3 cells/ml and from 0.66 to 44.93 mg C/m 3 , respectively. These values were the highest in the surface water layers and decreased with depth. The greatest abundance of bacteria (5099 individuals/m 3 ) was found in the freshened and warm water layer in Isfjorden. The highest biomass of zooplankton (182.41 mg C/m 3 ) was registered in the zone of interaction of coastal and transformed Atlantic waters in the archipelago inner shelf. The spatial variations of abundance and biomass of the planktonic communities were related to the thermohaline characteristics of the water masses and, probably, to microalgal blooms.

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Section: Discussioncontrasting

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Summer bacterio- and zooplankton in coastal waters of Svalbard

Dvoretsky¹,

Venger²,

Makarevich³

et al. 2012

Russ J Mar Biol

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“…Bacterial solubilisation of sinking particles directly impacts the composition and magnitude of the vertically ex ported material, but investigations of the metabolic activity of bacteria in sediment traps are scarce and reveal conflicting results from comparable marine environments. While Huston & Deming (2002) found higher cell-specific hydrolytic enzyme activity and a higher proportion of actively respiring bacteria in sediment trap samples from the Baffin Bay, Tammert et al (2008) found an equal contribution of actively respiring bacteria in sediment traps and ambient water samples in the Barents Sea. The community composition and source of total bacteria associated with sinking material as well as the temporal and geographical variation in the composition and activity of these communities largely remains unknown, and knowledge of how bacteria impact the biological carbon pump is therefore incomplete.…”

Section: Introductionmentioning

confidence: 95%

Community composition and extracellular enzyme activity of bacteria associated with suspended and sinking particles in contrasting arctic and sub-arctic marine environments

Tamelander¹

2013

Aquat. Microb. Ecol.

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“…For the measurements of distributions and the diversity of bacterial communities, 16S rRNA-DGGE can directly reflect the diversity of bacterial species and dominant groups as well as some specific bacteria (Ye et al 2009;Leloup et al 2009). Therefore, the combination of these methods has been successfully used to reveal the intrinsic bacterial communities in various sediments (Xu and Leff 2004;Tammert et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Characterization of depth-related bacterial communities and their relationships with the environmental factors in the river sediments

Huang

Chen

et al. 2011

World J Microbiol Biotechnol

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To better understand the bacterial processes in river sediments, it is necessary to investigate the depthrelated bacterial communities in the whole sediment profile. Sediment samples were collected to a depth of 25 cm from the Pearl River. Bacterial abundance, activity, cellspecific respiration rate, and diversity were measured, respectively, by 4 0 , 6-diamidino-2-phenylindole direct count, 5-cyano-2,3-ditolyl tetrazolium chloride (CTC) staining, electron transport system by CTC reduction, and denaturing gradient gel electrophoresis analysis of 16S rRNA amplification fragments. Results showed that the bacterial metabolism activities decreased with the sediment depth. The total bacterial abundance was highest in the surface sediment with 65.1 9 10 7 cells g -1 , and decreased to 11.1 9 10 7 cells g -1 below 20 cm in the sample location that suffered from heavy sewage inputs. The active bacteria accounted for 7.50-46.7% of the total bacterial number and decreased with the sediment depth. Electron transport system by the CTC reduction showed that bacterial respiration rate declined from 1.093 lmol CTC-formazan h -1 g -1 in the surface sediment to a half in the bottom sediment, while the cell-specific respiration increased significantly with the depth from 3.56 to 93.75 fmol CTCformazan cell -1 . The bacterial diversity also changed with the depth. Beta-Proteobacteria were the dominant species in the surface sediment, whereas Delta-Proteobacteria were the main species below 10 cm. Results of canonical correspondence analysis (CCA) indicated that the distribution of bacteria was affected by the combined effect of various dissolved inorganic matter, while the respiration rate was independent of the nutrient conditions. The specific bacterial distribution contributed to not only the nutrient cycle but also enhanced pollutant decomposition in sediment of the Pearl River. The results showed that some specific bacterial species had a strong activity in the deeper layers. Therefore, the metabolic functions of the deeper bacterial species should not be neglected.

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Bacterial biomass and activity in the marginal ice zone of the northern Barents Sea

Cited by 14 publications

References 66 publications

Summer bacterio- and zooplankton in coastal waters of Svalbard

Summer bacterio- and zooplankton in coastal waters of Svalbard

Community composition and extracellular enzyme activity of bacteria associated with suspended and sinking particles in contrasting arctic and sub-arctic marine environments

Characterization of depth-related bacterial communities and their relationships with the environmental factors in the river sediments

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