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What do we know about how the terrestrial multicellular soil fauna reacts to microplastic?
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This review synthesized studies on how soil-dwelling animals — including earthworms, insects, and mites — respond to microplastic contamination, finding evidence of ingestion, tissue accumulation, and harmful effects across multiple soil organism groups. However, most studies used unrealistically high concentrations, making it difficult to draw firm conclusions about risks at current environmental levels.
The ubiquitous accumulation of microplastic particles across all global ecosystems comes along with the uptake into soil food webs. In this work, we evaluated studies on passive translocation, active ingestion, bioaccumulation and adverse effects within the phylogenetic tree of multicellular soil faunal life. The representativity of these studies for natural soil ecosystems was assessed using data on the type of plastic, shape, composition, concentration and time of exposure.Available studies cover a wide range of soil organisms, with emphasis on earthworms, nematodes, springtails, beetles and lugworms, each focused on well known model organisms. Most of the studies applied microplastic concentrations similar to amounts in slightly to very heavily polluted soils. In many cases, however, polystyrene microspheres have been used, a combination of plastic type and shape, that is easily available, but do not represent the main plastic input into soil ecosystems. In turn, microplastic fibres are strongly underrepresented compared to their high abundance within contaminated soils. Further properties of plastic such as aging, coating and additives were insufficiently documented. Despite of these limitations, there is a recurring pattern of active intake followed by a population shift within the gut microbiome and adverse effects on motility, growth, metabolism, reproduction and mortality in various combinations, especially at high concentrations and small particle sizes.For future experiments, we recommend a modus operandi that takes into account the type, shape, grade of aging and specific concentrations of microplastic fractions in natural and contaminated soils as well as long-term incubation within soil mesocosms.
More Papers Like This
What do we know about how the terrestrial multicellular soil fauna reacts to microplastic?
AI summary Read the abstract
This review analyzed published studies on how multicellular soil organisms (including earthworms, mites, springtails, and nematodes) ingest and respond to microplastics, finding that most studies used unrealistically high concentrations and that ecologically relevant effects on soil fauna remain poorly characterized.
What do we know about how the terrestrial multicellular soil fauna reacts to microplastic?
AI summary Read the abstract
This review analyzed the available literature on how soil-dwelling animals respond to microplastics and found evidence of uptake, bioaccumulation, and harmful effects across many groups including earthworms, springtails, and beetles. Most studies used high concentrations not yet found in real soils, limiting conclusions about current environmental risks.
Implication of microplastics on soil faunal communities — identifying gaps of knowledge
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This systematic review examines how microplastics in soil affect earthworms, springtails, mites, and other soil-dwelling creatures that are essential for healthy soil. The impacts are highly variable and depend on the type of plastic, particle size, and soil conditions, making broad conclusions difficult. The review identifies critical knowledge gaps, noting that most studies use unrealistically high microplastic concentrations, and calls for research at levels that match actual field conditions.
Assessing the impacts of microplastics on soil meso- and macro-fauna
AI summary Read the abstract
This study aims to extend understanding of microplastic impacts beyond earthworms to include mites, collembolans, and other key soil invertebrate groups, developing ecotoxicology tests to establish risk assessment levels for microplastics in soil ecosystems.
How Soil Invertebrates Deal With Microplastic Contamination
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This accessible review explains how different types of soil invertebrates — including earthworms, springtails, and mites — encounter and respond to microplastic contamination in soils. It highlights how these tiny animals, which are vital for nutrient cycling and soil health, are affected by the growing presence of plastic particles in terrestrial ecosystems.
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