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Sediment and groundwater metagenomes from subsurface microbial communities from the Oak Ridge National Laboratory Oak
Lauren M Lui1, Torben N Nielsen1, Heidi J Smith2
1Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA.
Microbiology Resource Announcements
|June 27, 2025
Summary
This study analyzed subsurface microbial communities in sediment and groundwater at Oak Ridge Reservation. Researchers investigated how contamination affects these microbial ecosystems and their metabolic functions.
Area of Science:
- Environmental microbiology
- Subsurface biogeochemistry
- Metagenomics
Background:
- Subsurface environments harbor diverse microbial communities crucial for ecosystem functions.
- Understanding microbial life in these zones is vital for assessing environmental health and contamination impacts.
- Metagenomics offers a powerful tool to explore microbial diversity and function without cultivation.
Purpose of the Study:
- To characterize microbial communities in subsurface sediment and groundwater.
- To investigate the influence of contamination on microbial community structure and function.
- To compare microbial communities between sediment and groundwater habitats.
Main Methods:
- Collected 26 subsurface sediment and 9 groundwater samples from Oak Ridge Reservation.
- Utilized metagenomic sequencing to analyze DNA from collected samples.
- Examined microbial community composition, metabolic potential, and functional genes.
Main Results:
- Identified distinct microbial communities in sediment versus groundwater samples.
- Observed shifts in microbial community structure and function in response to contamination.
- Revealed specific metabolic pathways enriched or depleted under contaminated conditions.
Conclusions:
- Subsurface microbial communities exhibit significant variation based on habitat (sediment vs. groundwater) and contamination status.
- Metagenomic data provides insights into the ecological roles and adaptive strategies of subsurface microbes.
- This research contributes to understanding microbial resilience and function in contaminated subsurface environments.
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