Determining Microbial Roles in Ecosystem Function: Redefining Microbial Food Webs and Transcending Kingdom Barriers

Area of Science:

• Environmental microbiology
• Ecology
• Genomics

Background:

• Microorganisms significantly influence environmental chemistry and ecological health.
• Microbial activities can lead to pollution remediation (e.g., denitrification, oil breakdown) or degradation (e.g., eutrophication).
• Environmental genomics provides insights into microbial resource use, interactions, and adaptation.

Purpose of the Study:

• To explore the utility of recovering microbial genomes from environmental samples.
• To understand how microbial communities drive biogeochemical cycles.
• To integrate genomics with functional methods for a comprehensive ecological assessment.

Main Methods:

• Environmental DNA (eDNA) recovery, including both microbial (bacteria, archaea, protists) and eukaryotic genomes.
• Genomic analysis to infer metabolic capabilities and ecological roles.
• Integration of genomic data with functional assays to assess ecosystem processes.

Main Results:

• Genome recovery from environmental samples offers insights into microbial resource strategies and interspecies collaborations.
• Combining genomics with functional methods allows for detailed analysis of microbial community contributions to biogeochemical cycles.
• Extrapolation of key microbial attributes using lower-resolution methods can determine wider ecological relevance.

Conclusions:

• Environmental genomics is a powerful tool for understanding microbial impacts on ecosystem health.
• Integrated genomic and functional approaches provide a detailed view of microbial community functions.
• Extrapolation methods can extend the ecological relevance of microbial findings, despite current scale limitations.