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20 resultsShowing papers similar to Species sensitivity distributions of micro- and nanoplastics in soil based on particle characteristics
ClearSize-dependent effects of polystyrene plastic particles on the nematode Caenorhabditis elegans as related to soil physicochemical properties.
This study exposed the nematode Caenorhabditis elegans to two sizes of polystyrene particles in both liquid and soil media and found that smaller particles were more toxic in liquid while larger particles caused greater harm in soil. The results show that the physical properties of the surrounding environment significantly influence how microplastics harm soil organisms.
Research trends of microplastics in the soil environment: Comprehensive screening of effects
Researchers synthesized 106 datasets on microplastic effects on soil parameters, finding that polyethylene pellets and powders dominate experimental designs and that significant effects occurred across broad size ranges, while highlighting gaps in current soil microplastic research.
Effects of pristine microplastics and nanoplastics on soil invertebrates: A systematic review and meta-analysis of available data
About 49% of 1,061 biological endpoints were significantly affected by pristine micro- and nanoplastics across 56 studies on soil invertebrates, with polymers containing chloro and phenyl groups causing the most harm; concentrations above 1 g/kg in soil decreased earthworm growth and survival.
Soil-dwelling species-based biomarker as a sensitivity-risk measure of terrestrial ecosystems response to microplastics: A dose–response modeling approach
A dose-response modeling approach was applied to data from soil-dwelling organisms to assess the relative sensitivity of terrestrial ecosystems to microplastic contamination, producing species sensitivity distributions as a risk metric. The analysis revealed that certain soil invertebrates are particularly vulnerable even at relatively low microplastic concentrations.
Assessment of potential ecological risk for microplastic particles
Researchers applied an ecological risk assessment framework to evaluate the hazard posed by microplastic particles across multiple environmental compartments, using species sensitivity distributions and environmental concentration data. The assessment highlighted specific particle types and size ranges that present the greatest ecological risk.
Estimating species sensitivity distributions for microplastics by quantitatively considering particle characteristics using a recently created ecotoxicity database
Researchers estimated species sensitivity distributions for microplastics using Bayesian modeling that accounts for particle characteristics such as size, shape, and polymer type. The study suggests that quantitatively considering these microplastic properties yields more accurate environmental risk assessments than traditional approaches that treat all microplastics as equivalent.
Meta-analysis reveals differential impacts of microplastics on soil biota
Soil microplastic contamination ranged from 0.34 to over 410,000 items/kg across sites, and their presence significantly increased mortality rates and decreased individual numbers, diversity, and reproduction of soil organisms, though biomass was unaffected due to opposing effects on different organism groups.
Soils in distress: The impacts and ecological risks of (micro)plastic pollution in the terrestrial environment
This review examines how microplastics affect soil ecosystems, including their transport into soils, changes they undergo in the environment, and their interactions with soil organisms. The effects depend heavily on the type, shape, size, and amount of plastic particles present. Understanding these impacts is important because soil contamination with microplastics can affect food production and ultimately human exposure through the food chain.
Effects of different sizes of polystyrene micro(nano)plastics on soil microbial communities.
This study tested how polystyrene micro- and nanoplastic particles of three sizes affect soil microbial communities and nutrient cycling, finding that smaller particles caused greater disruption to nitrogen cycling and microbial activity. The results suggest that as plastics in soil fragment into smaller pieces over time, their impact on soil biology and fertility may worsen.
Soil microplastic characteristics and the effects on soil properties and biota: A systematic review and meta-analysis
Meta-analysis of 2,886 experimental groups found that microplastics significantly decreased soil bulk density and aggregate stability, indicating structural damage, while also reducing plant root biomass and soil phosphatase activity. Invertebrates were more sensitive to microplastics than other soil organisms, as particles can pass through nematode gut walls causing oxidative stress and altered gene expression.
Assessment of potential ecological risk for microplastic particles
Researchers developed a framework for assessing the ecological risk of microplastic particles, incorporating particle characteristics, environmental concentrations, and species sensitivity data. The assessment identified conditions under which current environmental microplastic levels pose significant risk to aquatic organisms.
A probabilistic risk assessment of microplastics in soil ecosystems
A probabilistic risk assessment comparing environmental microplastic concentrations in soils with effect concentrations from toxicity studies found that current soil microplastic levels pose a low but non-negligible risk to soil biota, with uncertainty driven by data gaps in both exposure and hazard data.
Critical thresholds in soil physical properties driven by microplastics
Researchers reanalyzed published data on microplastic effects on soil physical properties using piecewise statistical models and identified abrupt threshold responses occurring at concentrations as low as 0.06% by weight — far below levels typically studied — with thresholds varying by polymer type, particle shape, and aging condition.
A simplified model for size and shape of microplastics in soil: implications for risk assessment and particle measurement
Researchers developed a simplified model for characterizing microplastic size and shape in soil to address the lack of standardized measurement approaches, with implications for improving probabilistic risk assessment and fate modeling of microplastics in terrestrial ecosystems.
Ecotoxicological effects of plastics on plants, soil fauna and microorganisms: A meta-analysis
Meta-analysis of 2,936 observations from 140 studies found that plastics caused substantial detrimental effects to plants and soil fauna, but had less impact on microbial diversity. Larger plastics (>1 um) impaired plant growth and germination while nanoplastics primarily increased oxidative stress, and soil fauna reproduction and survival were more adversely affected by smaller particles.
Divergent responses in microbial metabolic limitations and carbon use efficiency to variably sized polystyrene microplastics in soil
Researchers found that polystyrene microplastics of all sizes disrupted soil microbe metabolism, but the smallest particles (nanoscale, 0.1 micrometers) caused the most stress. Smaller particles were more likely to enter microbial cells directly and reduce the efficiency with which soil microbes process carbon. This matters because soil microbes play a critical role in carbon cycling, and widespread microplastic contamination could affect how soil stores and releases carbon.
The extent and impacts of soil pollution by microplastics
This study examines the extent and impacts of soil pollution by microplastics, reviewing evidence of how microplastic particles accumulate in terrestrial environments and affect soil ecosystems, organisms, and agricultural systems.
Microplastic-induced reductions in population abundance and body size of soil nematodes
Researchers exposed three species of soil nematodes to polystyrene microplastics of different sizes and found significant reductions in both population numbers and body size after 45 days. The smallest particles (0.1 micrometers) caused the most severe effects, demonstrating that microplastic toxicity to soil organisms is size-dependent.
Microplastics' Ecotoxicological Assessment and Quantification in the Soil Ecosystem
This review examines the ecotoxicological effects and quantification methods for microplastics in soil ecosystems, synthesizing studies that have detected microplastics in agricultural soils, remote terrestrial environments, and other soil types to assess risks to soil-dwelling organisms.
Microplastics in soils: A review of methods, occurrence, fate, transport, ecological and environmental risks
This review examines the sources, detection methods, and environmental behavior of microplastics in soils, an area that has received far less attention than marine microplastic pollution. Researchers found that microplastics interact with soil properties and organisms in complex ways, potentially entering the human food chain. The study calls for standardized methods and more research into how these tiny plastic particles move through and affect terrestrial ecosystems.