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dc.contributor.authorRoy, C.
dc.contributor.authorMondal, N.
dc.contributor.authorPeketi, A.
dc.contributor.authorFernandes, S.
dc.contributor.authorMapder, T.
dc.contributor.authorVolvoikar, S.P.
dc.contributor.authorHaldar, P.K.
dc.contributor.authorNandi, N.
dc.contributor.authorBhattacharya, T.
dc.contributor.authorMazumdar, A.
dc.contributor.authorChakraborty, R.
dc.contributor.authorGhosh, W.
dc.date.accessioned2020-12-31
dc.date.accessioned2021-02-09T10:13:16Z
dc.date.available2020-07-23
dc.date.available2021-02-09T10:13:16Z
dc.date.issued2020
dc.identifier.citationJournal of Earth System Science, vol.129(1); 2020; Article no: 157
dc.identifier.issn0973-774X
dc.identifier.otherhttps://link.springer.com/article/10.1007/s12040-020-01423-y
dc.identifier.urihttps://doi.org/10.1007/s12040-020-01423-y
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/8471
dc.descriptionIF2019 - 1.423
dc.description.abstractGeomicrobiology of sulfur-boron-dominated, neutral-pH hydrothermal systems was revealed in a Trans-Himalayan spring named Lotus Pond, located at 4436 m, in Puga Valley, Ladakh (India), where water boils at 85°C. Water sampled along Lotus Pond's outflow (vent to an adjacent river called Rulang), representing an 85-14°C gradient, had high microbial diversity and boron/chloride/sodium/sulfate/thiosulfate concentration; potassium/silicon/sulfide/sulfite was moderately abundant, whereas cesium/lithium small but definite. Majority of the bacterial genera identified in the 85-72°C samples have no laboratory-growth reported at >45°C, and some of those mesophiles were culturable. Sulfur-species concentration and isotope-ratio along the hydrothermal gradient, together with the distribution of genera having sulfur-oxidizing members, indicated chemolithotrophic activities in the 85-72°C sites. While biodiversity increased in the vent-to-river trajectory all-day, maximum rise was invariably between the vent (85-81°C) and the 78-72°C site; below 72°C, diversity increased gradually. Biodiversity of the vent-water exhibited diurnal fluxes relatable to the sub-surface-processes-driven temporal fluxes in physicochemical properties of the discharge. Snow-melts infiltrating (via tectonic faults) the ~160°C geothermal reservoir located within the breccia, at ~450 m depth, apparently transport mesophilic microbes into the thermal waters. As these micro-organisms emanate with the vent-water, some remain alive, illustrating that natural bacterial populations are more heat-resilient than their laboratory counterparts.
dc.languageen
dc.publisherSpringer
dc.relation.ispartofJ Earth Syst Sci
dc.relation.isreferencedbySCI
dc.rightsOnly the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations
dc.titleGeomicrobial dynamics of Trans-Himalayan sulfur-borax spring system reveals mesophilic bacteria's resilience to high heat
dc.typeJournal Article
dc.affiliation.authorBose Institute, P-1/12 CIT Scheme VIIM, Kolkata 700054, India


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