Microbial Diversity and Mineralogical-Mechanical Properties of Calcitic Cave Speleothems in Natural and in Vitro Biomineralization Conditions

Frontiers in Microbiology
Navdeep K DhamiElizabeth L J Watkin

Abstract

Natural mineral formations are a window into important processes leading to carbon storage and mineralized carbonate structures formed through abiotic and biotic processes. In the current study, we made an attempt to undertake a comprehensive approach to characterize the mineralogical, mechanical, and microbial properties of different kinds of speleothems from karstic caves; with an aim to understand the bio-geo-chemical processes in speleothem structures and their impact on nanomechanical properties. We also investigated the biomineralization abilities of speleothem surface associated microbial communities in vitro. Mineralogical profiling using techniques such as X-ray powder Diffraction (XRD) and Tescan Integrated Mineral Analyzer (TIMA) demonstrated that calcite was the dominant mineral in the majority of speleothems with Energy Dispersive X-ray Analysis (EDS) indicating a few variations in the elemental components. Differing proportions of polymorphs of calcium carbonate such as aragonite and vaterite were also recorded. Significant variations in trace metal content were recorded through Inductively Coupled Plasma Mass Spectrometer (ICP-MS). Scanning Electron Microscopy (SEM) analysis revealed differences in morphological ...Continue Reading

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Citations

Feb 26, 2020·Applied Microbiology and Biotechnology·Asha Latha RamachandranNavdeep K Dhami
Nov 18, 2020·Environmental Microbiology·Angela CiriglianoTeresa Rinaldi
May 26, 2021·Nature Reviews. Urology·Mayandi SivaguruBruce W Fouke
Nov 19, 2021·The Science of the Total Environment·Zélia BontempsYvan Moënne-Loccoz

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Methods Mentioned

BETA
X ray
PCR
Scanning electron microscopy

Software Mentioned

Graph Pad Prism
Quantitative Insights into Microbial Ecology ( QIIME
NanoTest Platform Four
QIIME
USEARCH
AZtec
PEAR
Tescan Integrated Mineral Analyzer TIMA
Googlemaps
Seqtk

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