Environmental microplastics: sources, environmental interactions, ecotoxicological effects and plastivore-mediated biodegradation.
Singh CK, V N, Sodhi KK
Soil Health
Microplastics are already turning up inside vegetable roots, garden soil, and the worms that aerate your beds—quietly disrupting the same soil ecosystem your plants depend on to absorb water and nutrients.
Tiny plastic bits—smaller than a sesame seed—end up everywhere: in garden soil, rivers, and even the air. Once there, they can be swallowed by soil creatures, absorbed by plant roots, and passed up the food chain. The encouraging part is that scientists have found certain microbes and insects that can actually eat and break down plastics, offering a natural cleanup path.
Key Findings
Microplastics enter soil and water through multiple routes including synthetic textiles, tire wear particles, and fragmented plastic waste, making agricultural and garden soils a major accumulation sink.
Ecotoxicological studies show microplastics impair plant root function, disrupt soil microbial communities, and carry adsorbed chemical pollutants (e.g., pesticides, heavy metals) that amplify toxicity.
Plastivore organisms—including specific bacteria, fungi, and invertebrates—can enzymatically degrade certain plastics, representing a potential bioremediation strategy, though degradation rates remain slow at environmental scales.
chevron_right Technical Summary
Microplastics—tiny plastic fragments shed by everyday items—spread through soil, water, and air, harming living organisms at every level of the food chain. This review maps where they come from, how they move through ecosystems, what damage they cause, and how certain plastic-eating organisms might help break them down.
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