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Author Spotlight: Designing Simple and Inexpensive Techniques to Grow Methane-Oxidizing Bacteria in the Laboratory

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Microbiome mediating methane and nitrogen transformations in a subterranean estuary.

Sebastian Euler¹, Luke C Jeffrey¹, Damien T Maher¹

¹Faculty of Science and Engineering, Southern Cross University, Lismore, Australia.

Environmental Microbiology

|December 20, 2023

Summary

Subterranean estuaries harbor distinct microbial communities that transform greenhouse gases and nutrients. Understanding this hidden microbiome zonation is crucial for accurately assessing coastal fluxes.

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Characterizing Microbiome Dynamics – Flow Cytometry Based Workflows from Pure Cultures to Natural Communities

Characterizing Microbiome Dynamics – Flow Cytometry Based Workflows from Pure Cultures to Natural Communities

Published on: July 12, 2018

Area of Science:

Coastal biogeochemistry
Microbial ecology
Environmental science

Background:

Subterranean estuaries (STEs) are critical coastal zones for biogeochemical cycling.
Current flux estimations often overlook microbially mediated transformations within STEs.
The microbial ecology and spatial distribution of specialists in STEs are underexplored.

Purpose of the Study:

To spatially evaluate microbial communities involved in greenhouse gas and nutrient cycling within an STE.
To investigate the relationship between microbial populations and biogeochemical parameters in STEs.

Main Methods:

16S rRNA amplicon sequencing was employed.
Paired biogeochemical characterizations were performed.
Spatial analysis along a 15m transect from terrestrial to oceanic ends was conducted.

Main Results:

Methanogens were most abundant at the terrestrial end, correlating with high methane, carbon dioxide, and dissolved organic carbon.
Nitrifying and ammonia-oxidizing prokaryotes were abundant in the mixing zone, coinciding with lower ammonium levels.
Methane, ammonium, and dissolved organic carbon concentrations decreased significantly (>50%) along the STE transect.

Conclusions:

STEs exhibit distinct microbiome zonation influencing biogeochemical processes.
Microbial transformations significantly mitigate greenhouse gas and nutrient fluxes to coastal ecosystems.
Accurate assessment of STE fluxes requires accounting for microbial activity.