New multi-scale perspectives on the stromatolites of Shark Bay, Western Australia

Scientific Reports
E P SuosaariG P Eberli

Abstract

A recent field-intensive program in Shark Bay, Western Australia provides new multi-scale perspectives on the world's most extensive modern stromatolite system. Mapping revealed a unique geographic distribution of morphologically distinct stromatolite structures, many of them previously undocumented. These distinctive structures combined with characteristic shelf physiography define eight 'Stromatolite Provinces'. Morphological and molecular studies of microbial mat composition resulted in a revised growth model where coccoid cyanobacteria predominate in mat communities forming lithified discrete stromatolite buildups. This contradicts traditional views that stromatolites with the best lamination in Hamelin Pool are formed by filamentous cyanobacterial mats. Finally, analysis of internal fabrics of stromatolites revealed pervasive precipitation of microcrystalline carbonate (i.e. micrite) in microbial mats forming framework and cement that may be analogous to the micritic microstructures typical of Precambrian stromatolites. These discoveries represent fundamental advances in our knowledge of the Shark Bay microbial system, laying a foundation for detailed studies of stromatolite morphogenesis that will advance our understandin...Continue Reading

References

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Citations

Jul 17, 2016·Environmental Microbiology·Aurélien SaghaïPurificación López-García
May 11, 2017·Environmental Microbiology·Aurélien SaghaïPurificación López-García
Dec 13, 2016·FEMS Microbiology Ecology·John F Stolz
Feb 17, 2017·Scientific Reports·Gavin M RishworthJacqueline L Raw
Jul 25, 2019·Astrobiology·Marjorie A ChanHenderson James Cleaves
Jun 29, 2018·Frontiers in Microbiology·Richard Allen White IiiBrendan P Burns
May 24, 2019·Geobiology·John G WardenChristopher R Omelon
Aug 11, 2017·Annual Review of Marine Science·Sam J Purkis
Sep 29, 2020·Environmental Microbiology·Miguel IniestoPurificación López-García
Dec 31, 2019·Biochimica Et Biophysica Acta. Gene Regulatory Mechanisms·Alicia M Muro-Pastor, Wolfgang R Hess

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Datasets Mentioned

BETA
SRP055055

Methods Mentioned

BETA
PCR
X-ray

Software Mentioned

UCLUST
ENVI SPEAR Relative Water Depth tool
QIIME
PyNAST
Entophysalis
FastTree
Krona

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