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Visualizing Methane-Cycling Microbial Dynamics in Coastal Wetlands
Published on: January 31, 2025
980
Microbial eukaryotic distributions and diversity patterns in a deep-sea methane seep ecosystem
Alexis L Pasulka1,2, Lisa A Levin3, Josh A Steele4,5
1Integrative Oceanography Division and Center for Marine Biodiversity and Conservation, Scripps Institution of Oceanography, University of California, San Diego, CA, USA. apasulka@caltech.edu.
Environmental Microbiology
|December 15, 2015
Summary
Microbial eukaryotes in methane seep ecosystems are influenced by factors like substrate and sulfide concentration. Understanding these microbial eukaryotes is key to comprehending seep ecosystem dynamics.
Area of Science:
- Marine biology
- Microbial ecology
- Geochemistry
Background:
- Chemosynthetic ecosystems host diverse microorganisms.
- Factors structuring microbial eukaryotes (protists and fungi) in these environments are not well understood.
Purpose of the Study:
- To investigate geographic, geochemical, and ecological factors influencing microbial eukaryotic composition and distribution.
- To characterize microbial eukaryotic communities in the Hydrate Ridge methane seep ecosystem.
Main Methods:
- High-throughput 18S rRNA tag sequencing.
- Terminal restriction fragment length polymorphism (TRFLP) fingerprinting.
- Cloning and sequencing of full-length 18S rRNA genes.
Main Results:
- Microbial eukaryotic composition and diversity varied significantly with substrate type, seep activity, sulfide concentration, and geographic region.
- Sulfide concentration showed a strong correlation with changes in microbial eukaryotic composition and richness.
- Oxygen content and water depth also influenced microbial eukaryotic patterns, differing from those of bacteria, archaea, and macrofauna.
Conclusions:
- Environmental factors like substrate, sulfide, oxygen, and depth play crucial roles in structuring microbial eukaryotic communities at methane seeps.
- Distinct patterns of microbial eukaryotes were observed compared to other major faunal groups.
- Further research is needed to understand the functional role of microbial eukaryotes in seep ecosystem dynamics.
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