NDLI: Vegetation History in a Peat Succession Over the Past 8,000 years in the ISM-Controlled Kedar Nath Region, Garhwal Himalaya: Reconstruction Using Molecular Fossils

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M.S. Dissertation of Integrated PhD students on Biological Science

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PhD Thesis of Integrated PhD students on Biological Science

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Iron homeostasis in plants and its crosstalk with copper, zinc, and manganese

Land Use Change and Prediction for Valuating Carbon Sequestration in Viti Levu Island, Fiji

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Low-frequency wideband timing of InPTA pulsars observed with the uGMRT

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Master integrals for O(ααs) corrections to H → ZZ*

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Measurement of branching fraction and search for CP violation in B →φφK

Measurement of branching fractions and CP asymmetries for $d_s^+ →k^+ (η,π^0)$ and $d_s^+ →π^+ (η,π^0)$ decays at belle

Measurement of branching fractions of $Λ^+_c → ηΛπ^+, ηΣ^0π^+, Λ(1670)π^+,\ and\ ηΣ (1385)^+$

Measurement of inclusive charged-current ν μ cross sections as a function of muon kinematics at $⟨E_ν⟩ ∼ 6\ GeV$ on hydrocarbon

Measurement of inclusive charged-current ν μ scattering on hydrocarbon at ⟨ E ν ⟩ ∼ 6 GeV with low three-momentum transfer

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Measurement of the branching fractions of the $B ^+ → η ^{ℓ +} \nu_ℓ$ and $B^+ → η′ ℓ ^+ \nu_ℓ$ decays with signal-side only reconstruction in the full $q^2$ range

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Measurements of q(2) moments of inclusive B -> X(c)l(+)upsilon(l) decays with hadronic tagging.

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Model Comparison of the Transverse Momentum Spectra of Charged Hadrons Produced in PbPb Collision at $√s_{NN}=5.02\ TeV$

Modulation of RecFORQ- and RecA-Mediated Homologous Recombination in Escherichia coli by Isoforms of Translation Initiation Factor IF2

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Nickel-Catalyzed Selective Synthesis of α-Alkylated Ketones via Dehydrogenative Cross-Coupling of Primary and Secondary Alcohols

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Vegetation History in a Peat Succession Over the Past 8,000 years in the ISM-Controlled Kedar Nath Region, Garhwal Himalaya: Reconstruction Using Molecular Fossils

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Vegetation History in a Peat Succession Over the Past 8,000 years in the ISM-Controlled Kedar Nath Region, Garhwal Himalaya: Reconstruction Using Molecular Fossils

Content Provider	IISER Mohali
Author	Bhattacharya, Sharmila Ankit, Yadav Mishra, Praveen K. Kishor, Harsh Srivastava, Pradeep
Abstract	The Holocene epoch has witnessed several natural climate variations and these are well encoded in various geological archives. The present biomarker investigation in conjunction with previously published multi-proxy records was applied to reconstruct organic matter (OM) sources forming the peat succession spanning the last 8000 cal yr BP and shift in hydrological conditions from the Kedarnath region, Garhwal Himalaya. Intensified monsoon prevailed from ∼7515 until ∼2300 cal yr BP but with reversal to transient arid period particularly between ∼5200 and ∼3600 cal yr BP as revealed by the variability in n-C23/n-C31, ACL (average chain length of n-alkanes) and Paq (P-aqueous) values. A prolonged arid phase is recognizable during the interval between ∼2200 and ∼370 cal yr BP suggested by the n-alkane proxies. Regional scale heterogeneity in the monsoonal pattern is known in the studied temporal range of mid to late Holocene across the Indian subcontinent that is probably a result of complex climate dynamics, sensitivity of proxies and impact of teleconnections. The biomarker signatures deduced from gas chromatography mass spectrometry (GCMS) analysis are suggestive of a mixed biotic input that includes prokaryotes, Sphagnum spp. and gymnosperm flora. The mid chain alkanes viz. n-C23 and n-C25 denote the presence of typical peat forming Sphagnum moss that preferentially grows in humid and waterlogged conditions. Diterpane marker such as ent-kaurane indicates contribution of gymnosperms, whereas the hopanes are signatures of microbial input. The preservation of organic matter is attributed to little microbial degradation in a largely suboxic depositional environment. Our study strengthens the applicability of organic geochemical proxies for the reconstruction of past climate history and indicates their suitability for use on longer timescales given the high preservation potential of the molecular remains.
File Format	PDF
ISSN	22966463
Alternate Webpage(s)	http://210.212.36.82:8080/jspui/handle/123456789/4373?mode=full
Journal	Frontiers in Earth Science
Volume Number	9
Language	English
Publisher	Frontiers Media S.A.
Publisher Date	2021-01-01
Access Restriction	Open
Subject Keyword	Kedarnath Region History Molecular Fossils Vegetation
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Social Sciences

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in