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Title: Dynamics of archaea at fine spatial scales in Shark Bay mat microbiomes

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep46160· OSTI ID:1358501
 [1];  [2];  [3];  [1];  [4];  [1]
  1. The Univ. of New South Wales, Sydney (Australia)
  2. Univ. of Connecticut, Storrs, CT (United States); Univ. of New South Wales, Sydney (Australia)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  4. Univ. of Connecticut, Storrs, CT (United States)

Modern microbial mats provide remarkable insights into assembly, function and origin of complex microbial ecosystems. An excellent model of such systems is located in Shark Bay, Australia. Although bacteria have been extensively investigated in these communities, the role of archaea in microbial mats is poorly understood. Delineating the spatial distribution of archaea with mat depth will enable resolution of specific niches associated with this domain. In the present study, high throughput amplicon sequencing was undertaken in conjunction with key biogeochemical properties of two mat types (smooth and pustular). A total of 13,547,552 unfiltered sequences were obtained, and classified sequences were affiliated to three archaeal and candidate phyla, Parvarchaeota, Euryarchaeota and Crenarchaeota. One way analysis of similarity tests (ANOSIM) indicated the archaeal community structures of smooth and pustular mats were significantly different (global R = 1, p = 0.1 %). Smooth mats possessed higher archaeal diversity, dominated by Parvarchaeota, followed by Thermoplasmata, Class marine benthic group B and Halobacteria. The methanogenic community in smooth mats was dominated by hydrogenotrophic Methanomicrobiales, as well as methylotrophic Methanosarcinales, Methanococcales, Methanobacteriales and Methanomassiliicoccaceae. Conversely, pustular mats were enriched with Halobacteria and Parvarchaeota. The rates of oxygen production/consumption as well as sulphate reduction were up to four times higher in smooth than in pustular mats. Methane production peaked in the oxic part of mats and was up to seven-fold higher in smooth than in pustular mats. Metabolic cooperation in putative surface anoxic niches is proposed to be key in efficient cycling of key nutrients in these systems.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1358501
Report Number(s):
PNNL-SA-120053
Journal Information:
Scientific Reports, Vol. 7; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 47 works
Citation information provided by
Web of Science

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Cited By (13)

Microbial diversity and biomarker analysis of modern freshwater microbialites from Laguna Bacalar, Mexico journal April 2018
The Vulnerability of Microbial Ecosystems in A Changing Climate: Potential Impact in Shark Bay journal September 2019
Analysis of Metal Effects on C‐Peptide Structure and Internalization journal July 2019
Bioinformatic, phylogenetic and chemical analysis of the UV-absorbing compounds scytonemin and mycosporine-like amino acids from the microbial mat communities of Shark Bay, Australia: Sunscreens from Shark Bay microbial mats journal January 2019
Archaeal Communities in Deep Terrestrial Subsurface Underneath the Deccan Traps, India journal July 2019
Comparative metagenomics of microbial mats from hypersaline lakes at Rottnest Island (WA, Australia), advancing our understanding of the effect of mat community and functional genes on microbialite accretion journal January 2020
Anti-biofilm effect of a butenolide/polymer coating and metatranscriptomic analyses journal January 2018
Viral Communities of Shark Bay Modern Stromatolites journal June 2018
Isolation of novel quorum-sensing active bacteria from microbial mats in Shark Bay Australia journal March 2019
A year in the life of a thrombolite: comparative metatranscriptomics reveals dynamic metabolic changes over diel and seasonal cycles journal July 2018
Biodegradability of legacy crude oil contamination in Gulf War damaged groundwater wells in Northern Kuwait journal February 2019
A year in the life of a thrombolite: comparative metatranscriptomics reveals dynamic metabolic changes over diel and seasonal cycles: A year in the life of a thrombolite journal December 2017
Comparative Metagenomics Provides Insight Into the Ecosystem Functioning of the Shark Bay Stromatolites, Western Australia journal June 2018

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