Elemental composition and bacterial incidence in firn-cores at Midre Lovénbreen glacier, Svalbard

Singh, Shiv Mohan; Gawas-Sakhalkar, Puja; Naik, Simantini; Ravindra, Rasik; Sharma, Jyotsna; Upadhyay, Ajay Kumar; Mulik, Ravindra Uttam; Bohare, Priyanka

doi:10.1017/s0032247413000533

Cited by 6 publications

(10 citation statements)

References 43 publications

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“…In the present study Cr, and Cu are lower than reported from the northeastern Chukchi Sea (Naidu and others 1997), Beaufort Sea inner shelf (Sweeney and Sathy-Naidu 1989), Laptev Sea (Holemann and others 1999) and Kongsfjorden (Lu and others 2012) (Table 2). Compared to the current study the base line data of terrestrial habitats (glacier ice core and lichens) of Svalbard (Singh and others 2012, 2013) showed lower concentrations of metals. Lu and others (2012) reported higher concentration of three trace metals (Cr, Cu and Pb) in the sediments of Kongsfjord and concluded that probably the west Spitsbergen current (WSC) brings Pb from low and middle latitudes to the Arctic.…”

Section: Resultscontrasting

confidence: 82%

“…The transport of metals is a consequence of atmospheric, oceanic and biological cycling of elements. Recently, the distributions of metals have been assessed from many habitats of Arctic such as sea sediments (Cai and others 2011), seabird tissue (Blais and others 2005), Cryoconites and lichens (Singh and others 2012) and Glacier ice cores (Singh and others 2013). There are reports on elevated levels of trace metals [Zinc (Zn), Copper (Cu), Lead (Pb), Cadmium (Cd), Mercury (Hg), Cobalt (Co), Nickel (Ni), Manganese (Mn) and Chromium (Cr) due to anthropogenic processes (AMAP 1998, 2005; Macdonald and others 2000; Lu and others 2012).…”

Section: Introductionmentioning

confidence: 99%

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Elemental composition and bacterial occurrence in sediment samples on two sides of Brøggerhalvøya, Svalbard

et al. 2015

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The present study was conducted to determine the elemental concentration and bacterial presence in the ocean on the two sides of Brøggerhalvøya, a peninsula in Svalbard. Sediments from 25 different locations were collected and subjected to elemental analysis using inductively coupled plasma mass spectrometry (ICPMS). In total, 21 elements were analysed. The elements in their decreasing order of concentrations on the Kongsfjorden side of Brøggerhalvøya were Fe> Mn> Ba > V > Zn > Sr > Rb > Cr > Li > Ni > As > Pb > Cu > Co > Cs >Ag > Be > U> Bi >Tl > Cd while that for Forlandsendet side of Brøggerhalvøya they were Fe > Ba >Mn > V> Sr > Zn > Rb > Cr > Li > Ni > Pb > Cu > As > Co > Cs > Be > U> Tl > Bi > Cd. On the other hand, at a coastal outcrop, elements in their decreasing order of concentration were Fe > Mn > Cr > Sr > Ba > Rb > Cr > Zn > V > Rb > Ni > Li > Co > Cu > As > Pb > Cs > Be > Cd > Tl > U > Bi. AMS dates confirmed the age of outcrop sediment to be 12,496 to 42,500 BP. The crustal enrichment factor calculated for all the elements with reference to Fe values, demonstrates that the elements have derived from a crustal source. Total bacterial counts ranged from 3.30 × 105 to 3.02 × 106 per gm soil sediment. Culturable bacterial counts in these sediments were between 2.00 × 102 to 2.09 × 105 CFU's per gm. Overall comparison showed high Fe and Mn concentrations around Brøggerhalvøya, due to the presence of specific bacteria which play key roles in metal cycling and carry out biogeochemical transformations.

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Section: Resultscontrasting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Elemental composition and bacterial occurrence in sediment samples on two sides of Brøggerhalvøya, Svalbard

et al. 2015

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“…Sheridan et al and Miteva et al studied the distributions of bacterial communities in deep Greenland ice cores, while Singh et al explored yeast communities from Svalbard. Recently, the Svalbard glaciers have also been studied for microbial cell budgets , bacterial community structure , elemental composition, and bacterial incidence . The diversity of bacteria sealed in glacier ice cores has also been studied from Kuytun 51 (Mountain Tianshan) glacier , and microbial population variation in Himalayan, Chile, Alaska glaciers has been reviewed .…”

Section: Discussionmentioning

confidence: 99%

Taxonomic characterization and the bio‐potential of bacteria isolated from glacier ice cores in the High Arctic

Singh

Roy

2015

J. Basic Microbiol.

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Glacier ice and firn cores have ecological and biotechnological importance. The present study is aimed at characterizing bacteria in crustal ice cores from Svalbard, the Arctic. Counts of viable isolates ranged from 10 to 7000 CFU/ml (mean 803 CFU/ml) while the total bacterial numbers ranged from 7.20 × 10(4) to 2.59 × 10(7) cells ml(-1) (mean 3.12 × 10(6) cells ml(-1) ). Based on 16S rDNA sequence data, the identified species belonged to seven species, namely Bacillus barbaricus, Pseudomonas orientalis, Pseudomonas oryzihabitans, Pseudomonas fluorescens, Pseudomonas syncyanea, Sphingomonas dokdonensis, and Sphingomonas phyllosphaerae, with a sequence similarity ranging between 93.5 and 99.9% with taxa present in the database. The isolates exhibited unique phenotypic properties, and three isolates (MLB-2, MLB-5, and MLB-9) are novel species, yet to be described. To the best of our knowledge, this is the first report on characterization of cultured bacterial communities from Svalbard ice cores. We conclude that high lipase, protease, cellulase, amylase, and urease activities expressed by most of the isolates provide a clue to the potential industrial applications of these organisms. These microbes, producing cold-adapted enzymes may provide an opportunity for biotechnological research.

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“…There are, to our knowledge, no reliable data on the mineral dust content in Svalbard snow, but various published data on trace element analyses suggest typical values between a few tens of ppb (ng g −1 ) and a few ppm (µg kg −1 ) based on typical crustal proportions (Casey, 2012;Singh et al, 2015;Thomas et al, 2020). Carbonate minerals are only a minor dust constituent in the wintertime aerosol over Svalbard and thus unlikely to contribute much to deposition in snow (Weinbruch et al, 2012;Moroni et al, 2015).…”

Section: Possible Effects Of Dust In C Ec Snow and C Wioc Snowmentioning

confidence: 92%

Elemental and water-insoluble organic carbon in Svalbard snow: a synthesis of observations during 2007–2018

et al. 2021

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Abstract. Light-absorbing carbonaceous aerosols emitted by biomass or fossil fuel combustion can contribute to amplifying Arctic climate warming by lowering the albedo of snow. The Svalbard archipelago, being near to Europe and Russia, is particularly affected by these pollutants, and improved knowledge of their distribution in snow is needed to assess their impact. Here we present and synthesize new data obtained on Svalbard between 2007 and 2018, comprising measurements of elemental (EC) and water-insoluble organic carbon (WIOC) in snow from 37 separate sites. We used these data, combined with meteorological data and snowpack modeling, to investigate the variability of EC and WIOC deposition in Svalbard snow across latitude, longitude, elevation and time. Overall, EC concentrations (CsnowEC) ranged from <1.0 to 266.6 ng g−1, while WIOC concentrations (CsnowWIOC) ranged from <1 to 9426 ng g−1, with the highest values observed near Ny-Ålesund. Calculated snowpack loadings (LsnowEC, LsnowWIOC) on glaciers surveyed in spring 2016 were 0.1 to 2.6 mg m−2 and 2 to 173 mg m−2, respectively. The median CsnowEC and the LsnowEC on those glaciers were close to or lower than those found in earlier (2007–2009), comparable surveys. Both LsnowEC and LsnowWIOC increased with elevation and snow accumulation, with dry deposition likely playing a minor role. Estimated area-averaged snowpack loads across Svalbard were 1.1 mg EC m−2 and 38.3 mg WIOC m−2 for the 2015–2016 winter. An ∼11-year long dataset of spring surface snow measurements from the central Brøgger Peninsula was used to quantify the interannual variability of EC and WIOC deposition in snow. In most years, CsnowEC and CsnowWIOC at Ny-Ålesund (50 m a.s.l.) were 2–5 times higher than on the nearby Austre Brøggerbreen glacier (456 m a.s.l.), and the median EC/WIOC in Ny-Ålesund was 6 times higher, suggesting a possible influence of local EC emission from Ny-Ålesund. While no long-term trends between 2011 and 2018 were found, CsnowEC and CsnowWIOC showed synchronous variations at Ny-Ålesund and Austre Brøggerbreen. When compared with data from other circum-Arctic sites obtained by comparable methods, the median CsnowEC on Svalbard falls between that found in central Greenland (lowest) and those in continental sectors of European Arctic (northern Scandinavia, Russia and Siberia; highest), which is consistent with large-scale patterns of BC in snow reported by surveys based on other methods.

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Elemental composition and bacterial incidence in firn-cores at Midre Lovénbreen glacier, Svalbard

Cited by 6 publications

References 43 publications

Elemental composition and bacterial occurrence in sediment samples on two sides of Brøggerhalvøya, Svalbard

Elemental composition and bacterial occurrence in sediment samples on two sides of Brøggerhalvøya, Svalbard

Taxonomic characterization and the bio‐potential of bacteria isolated from glacier ice cores in the High Arctic

Elemental and water-insoluble organic carbon in Svalbard snow: a synthesis of observations during 2007–2018

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