Vis enkel innførsel

dc.contributor.authorShamurailatpam, Monica S.
dc.contributor.authorTelling, Jon
dc.contributor.authorWadham, Jemma Louise
dc.contributor.authorRamanathan, A. L.
dc.contributor.authorYates, Christopher A.
dc.contributor.authorRaju, N. Janardhana
dc.date.accessioned2023-01-06T14:06:29Z
dc.date.available2023-01-06T14:06:29Z
dc.date.issued2022-12-07
dc.description.abstractIn situ experiments were conducted to determine the net ecosystem production (NEP) in cryoconite holes from the surface of two glaciers (Patsio glacier and Chhota Shigri glacier) in the Western Himalaya during the melt season from August to September 2019. The study aimed to gain an insight into the factors controlling microbial activity on glacier surfaces in this region. A wide range of parameters, including sediment thickness, TOC %, TN %, chlorophyll-a concentration, altitudinal position, and grain size of the cryoconite mineral particles were considered as potential controlling factors. From redundancy analysis, the rate of Respiration observed in cryoconite at Chhota Shigri glacier was predominantly explained by sediment thickness in cryoconite holes (37.1% of the total variance, p < 0.05) with Photosynthesis largely explained by the chlorophyll-a content of the sediment (39.6%, p < 0.05). NEP was explained primarily by the TOC content and sediment thickness in cryoconite holes (35.8% and 22.1% respectively, p < 0.05). The altitudinal position of the cryoconite is strongly correlated with biological activity, suggesting that the stability of cryoconite holes was an important factor driving primary productivity and respiration rate on the surface of Chhota Shigri glacier. We calculated that the number of melt seasons required to accumulate organic carbon in thin sediment layers (< 0.3 cm), based on our measured NEP rates, ranged from 11 to 70 years, indicating that the organic carbon in cryoconite holes largely derives from allochthonous inputs, such as elsewhere on the glacier surface. Phototrophic biomass in the same thin sediment layer of cryoconite was estimated to take atleast 4 months to be produced in situ (with mean estimated time upto 1.7 ± 1.5 years). Organic matter accumulated inside the cryoconite holes both through allochthonous deposition and via biological activity on the glacier surface in these areas may have the potential to export dissolved organic matter and associated nutrients to downstream ecosystems. Given the importance of Himalayan glaciers as a vital water source for millions of people downstream, this study highlights the need for further investigation in aspects of the quantification of in situ produced organic matter and its impact on supraglacial melting in the Himalayaen_US
dc.descriptionIkke OAen_US
dc.identifier.citationShamurailatpam, Telling J, Wadham JL, Ramanathan, Yates, Raju. Factors controlling the net ecosystem production of cryoconite on Western Himalayan glaciers. Biogeochemistry. 2022en_US
dc.identifier.cristinIDFRIDAID 2094151
dc.identifier.doi10.1007/s10533-022-00998-6
dc.identifier.issn0168-2563
dc.identifier.issn1573-515X
dc.identifier.urihttps://hdl.handle.net/10037/28065
dc.language.isoengen_US
dc.publisherSpringeren_US
dc.relation.journalBiogeochemistry
dc.relation.projectIDNorges forskningsråd: 223259en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleFactors controlling the net ecosystem production of cryoconite on Western Himalayan glaciersen_US
dc.type.versionacceptedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


Tilhørende fil(er)

Thumbnail

Denne innførselen finnes i følgende samling(er)

Vis enkel innførsel

Attribution 4.0 International (CC BY 4.0)
Med mindre det står noe annet, er denne innførselens lisens beskrevet som Attribution 4.0 International (CC BY 4.0)