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soil plastisphere: The nexus of microplastics, bacteria, and biofilms
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This commentary examines how microplastics in soil create new microbial ecosystems called the plastisphere, where bacteria colonize plastic surfaces and form biofilms. Researchers discuss how microplastics can carry harmful pathogens and contaminants through soil and into water systems. The study emphasizes the urgent need to better understand how bacteria adapt to these microplastic-rich environments, given the implications for ecosystem and human health.
Bacteria are one of the oldest life forms on Earth, dating back to more than 3.5 billion years ago. They control the global cycling of carbon, nitrogen, and oxygen. They provide plants, fungi and other organisms with the necessary nutrients and elements. They help us digest our food, protect us against pathogens, and even affect our behavior. Microplastics, however, have disrupted the bacterial ecosystems across the globe, from the soil to the oceans. Microplastics are tiny plastic particles formed as a result of the breakdown of the consumer products and plastic waste. Due to their stability and persistence, they can travel long distances in the soil and subsurface environments, ultimately making their way to the water resources, rivers, and oceans. In this journey, they interact with bacteria and other micro/macro-organisms, become ingested or colonized, and act as carriers for contaminants and pathogens. How and whether bacteria adapt to these new microplastic-rich ecosystems are open questions with far-reaching implications for the health of our planet and us. Therefore, there is an urgent need for improving our fundamental understanding of bacterial interactions with the microplastics in complex environments. In this commentary, we focus on the nexus of bacteria, biofilms, and microplastics, also known as the “plastisphere”, and discuss the challenges and opportunities.
More Papers Like This
The soil plastisphere
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Researchers reviewed the emerging concept of the "soil plastisphere" — the microbial community colonizing plastic debris in terrestrial ecosystems — finding that plastic particles act as selective habitats that enrich distinct bacterial taxa through mechanisms distinct from those operating in aquatic environments, and outlining key open questions for future research.
Soil plastisphere: Exploration methods, influencing factors, and ecological insights
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This review explored the soil plastisphere, examining how microplastics serve as substrates for microbial colonization in terrestrial ecosystems, and identified key factors influencing plastisphere formation, composition, and ecological functions in soil environments.
Farmland Microhabitat Mediated by a Residual Microplastic Film: Microbial Communities and Function
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Researchers studied how leftover plastic film in farmland creates a unique microbial environment called a plastisphere, where different bacteria and fungi colonize compared to the surrounding soil. The plastic surfaces attracted more pathogens and bacteria involved in nitrogen and sulfur cycling, potentially increasing nutrient loss from agricultural soil. This finding is concerning because it suggests microplastic contamination in farmland does not just sit there passively but actively changes the soil ecosystem in ways that could affect crop health and food safety.
(micro)Plastic biofilms: Keeping afloat by carving out a new niche
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This review examined how microplastics accumulate microbial biofilms, creating a distinct ecological niche with unique community composition and metabolic activities. The microplastic biofilm, or plastisphere, can harbor pathogens and antibiotic-resistant bacteria, raising concerns about plastic particles as vectors of biological hazards.
The ecology of the plastisphere: Microbial composition, function, assembly, and network in the freshwater and seawater ecosystems
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Researchers studied the communities of bacteria and fungi that colonize microplastic surfaces in freshwater and seawater, forming what scientists call the plastisphere. These microplastic-associated communities were distinctly different from those in surrounding water, and included a higher proportion of disease-causing organisms and species involved in pollutant degradation. The findings suggest that microplastics create new habitats that can harbor pathogens and alter natural microbial ecosystems in ways that may affect water quality and human health.
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