Exploring the Composition and Functions of Plastic Microbiome Using Whole-Genome Sequencing

Area of Science:

• Environmental Microbiology
• Marine Biology
• Ecotoxicology

Background:

• Microplastics in marine environments are known for ecotoxicological effects and chemical associations.
• The functional potential of microbial communities colonizing microplastics remains largely understudied.
• Microplastics may select for unique microbiomes involved in significant environmental functions.

Purpose of the Study:

• To investigate the interaction between marine biofilm-forming microorganisms and different types of microplastics.
• To characterize the functional potential of the microbiome associated with marine microplastics.

Main Methods:

• Whole-genome sequencing was employed on four types of microplastics incubated in the marine environment.
• Taxonomic and functional gene analysis of the associated microbial communities.

Main Results:

• Microplastic surfaces displayed distinct microbial profiles and niche partitioning.
• Significant enrichment of microbial genera involved in xenobiotic degradation, carbon cycling, and heavy metal resistance.
• Abundance of *Vibrio alginolyticus* and *Vibrio campbellii* indicates potential risks to marine food chains and aquaculture.

Conclusions:

• Marine microplastics harbor unique and functionally diverse microbial communities.
• The plastic-associated microbiome possesses genes for significant environmental processes, including pollutant degradation.
• Microplastic pollution presents potential risks to marine ecosystems, food webs, and aquaculture industries.