We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Soil heterogeneity in the horizontal distribution of microplastics influences productivity and species composition of plant communities
AI summary Read the abstract
Researchers grew experimental plant communities in soils with either homogeneous or heterogeneous horizontal distributions of six common microplastic types, finding that spatial heterogeneity in microplastic distribution significantly influences plant community productivity and species composition in terrestrial ecosystems.
Contamination of soils by microplastics can have profound ecological impacts on terrestrial ecosystems and has received increasing attention. However, few studies have considered the impacts of soil microplastics on plant communities and none has tested the impacts of spatial heterogeneity in the horizontal distribution of microplastics in the soil on plant communities. We grew experimental plant communities in soils with either a homogeneous or a heterogeneous distribution of each of six common microplastics, i.e., polystyrene foam (EPS), polyethylene fiber (PET), polyethylene bead (HDPE), polypropylene fiber (PP), polylactic bead (PLA) and polyamide bead (PA6). The heterogeneous treatment consisted of two soil patches without microplastics and two with a higher (0.2%) concentration of microplastics, and the homogeneous treatment consisted of four patches all with a lower (0.1%) concentration of microplastics. Thus, the total amounts of microplastics in the soils were exactly the same in the two treatments. Total and root biomass of the plant communities were significantly higher in the homogeneous than in the heterogeneous treatment when the microplastic was PET and PP, smaller when it was PLA, but not different when it was EPS, HDPE or PA6. In the heterogeneous treatment, total and root biomass were significantly smaller in the patches with than without microplastics when the microplastic was EPS, but greater when the microplastic was PET or PP. Additionally, in the heterogeneous treatment, root biomass was significantly smaller in the patches with than without microplastics when the microplastic was HDPE, and shoot biomass was also significantly smaller when the microplastic was EPS or PET. The heterogeneous distribution of EPS in the soil significantly decreased community evenness, but the heterogeneous distribution of PET increased it. We conclude that soil heterogeneity in the horizontal distribution of microplastics can influence productivity and species composition of plant communities, but such an effect varies depending on microplastic chemical composition (types) and morphology (shapes).
More Papers Like This
Effects of soil microplastic heterogeneity on plant growth vary with species and microplastic types
AI summary Read the abstract
Researchers tested how the uneven distribution of microplastics in soil affects the growth and root foraging behavior of seven herbaceous plant species. They found that plant responses to microplastic heterogeneity varied significantly depending on both the plant species and the type of microplastic present. The study suggests that the patchy nature of real-world soil microplastic contamination may affect plant communities in more complex ways than uniform exposure experiments indicate.
Microplastic-contamination can reshape plant community by affecting soil properties
AI summary Read the abstract
Researchers investigated how polyethylene and polypropylene microplastics affect naturally germinated plant communities by altering soil properties. The study found that microplastics changed soil nutrient availability, decreased community stability, and shifted plant species composition, with total phosphorus identified as the strongest driver of changes in plant community structure.
Increasing soil microplastic diversity decreases community biomass via its impact on the most dominant species
AI summary Read the abstract
Researchers experimentally mixed different numbers and types of microplastics into soil hosting six plant species, finding that greater variety of microplastic types in the soil reduced total plant biomass — mainly by suppressing the growth of the dominant grass species. The results suggest that real-world environments contaminated with multiple types of microplastics may suffer greater ecological harm than studies using a single plastic type would predict.
Microplastics increase soil microbial network complexity and trigger diversity-driven community assembly
AI summary Read the abstract
Researchers found that microplastics in soil increased bacterial network complexity and shifted microbial community assembly in a diversity-dependent manner, with high-density polyethylene causing more harm to plant growth than polystyrene or polylactic acid particles.
Microplastic shape, concentration and polymer type affect soil properties and plant biomass
AI summary Read the abstract
Experiments showed that microplastic shape, concentration, and polymer type all influence soil physical properties and plant biomass, with certain types reducing plant growth. The findings highlight that the wide variety of plastic particle types entering soils creates complex and variable ecological risks.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.