The growth responses of Eisenia fetida (Savigny 1826) exposed to microplastics

Effect of Microplastic Exposure on Growth Parameters in Eisenia fetida (Savigny 1826)

Combined effect of polyethylene microplastics and Microcystis aeruginosa spent medium on Daphnia magna

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Researchers combined polyethylene microplastics with metabolites from the harmful cyanobacterium Microcystis aeruginosa in Daphnia magna exposures, finding that the combination increased microplastic ingestion sixfold and suppressed antioxidant responses, leading to higher mortality and lower reproduction during recovery compared to microplastic exposure alone.

The Potential Concentration-Dependent Effects of Tire Microplastics on the Earthworm Eisenia fetida

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Researchers exposing earthworms (Eisenia fetida) to tire-derived microplastics at four concentrations found significant increases in antioxidant enzyme activity — including catalase, superoxide dismutase, and glutathione peroxidase — indicating oxidative stress and immune system activation at environmentally relevant exposure levels.

Identification of Microorganisms Related to Microplastics

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Plastic debris in aquatic environments attracts diverse microbial communities that differ from those in surrounding water, with these plastisphere microorganisms influencing both the degradation fate of plastics and the dispersal of potentially pathogenic or plastic-degrading microbes. Identifying which microorganisms colonize microplastics is essential for understanding both environmental risks and potential bioremediation opportunities.

Identification of Microorganisms Related to Microplastics

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Plastic debris in aquatic environments is rapidly colonized by diverse microbial communities, with phototrophic organisms like cyanobacteria and diatoms attaching first before being succeeded by proteobacteria, forming what is known as the plastisphere. These microbial biofilms can alter plastic degradation rates and potentially harbor and transport pathogenic organisms, adding a biological dimension to microplastic pollution risks.