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61,005 resultsShowing papers similar to Effects of microplastic particles on carbon source metabolism and bacterial community in freshwater lake sediments
ClearEffects of microplastics on the structure and function of bacterial communities in sediments of a freshwater lake
Researchers examined how microplastics alter the structure and function of bacterial communities in sediments, finding that plastic exposure shifted community composition and reduced overall diversity compared to plastic-free controls. Functional analysis showed impaired denitrification and organic matter decomposition in microplastic-contaminated sediments, indicating ecosystem-level consequences for nutrient cycling.
Effects of microplastics on nitrogen and phosphorus cycles and microbial communities in sediments
Researchers found that PVC, PLA, and polypropylene microplastics altered nitrogen and phosphorus cycling in freshwater sediments by shifting microbial community composition, with effects varying by polymer type and biodegradability.
Impact of Microplastic on Freshwater Sediment Biogeochemistry and Microbial Communities Is Polymer Specific
Researchers used a microcosm approach to test how three common plastic types found in Great Lakes sediments affect freshwater benthic biogeochemistry and microbial communities. They found that each polymer had distinct effects: PET fibers decreased ecosystem metabolism, PVC particles increased nutrient uptake, and tire-derived rubber most substantially altered microbial community function. The study highlights that the environmental impact of microplastics in freshwater sediments depends heavily on the specific polymer type involved.
Distinct microbial metabolic activities of biofilms colonizing microplastics in three freshwater ecosystems
Biofilms growing on microplastics in three freshwater ecosystems showed distinct patterns of carbon metabolism compared to biofilms on glass, with PET-colonizing biofilms showing lower metabolic diversity. Environmental factors like nutrient levels and turbidity also shaped biofilm function, suggesting microplastics alter microbial-mediated carbon cycling in rivers and lakes.
Microplastics as carbon-nutrient sources and shaper for microbial communities in stagnant water
Six types of microplastics were tested as carbon and nutrient sources for microbial communities in stagnant water over eight weeks, finding that certain polymers including polyurethane elevated assimilable organic carbon and selectively enriched plastic-degrading bacterial genera, demonstrating that microplastics can actively shape microbial community structure by serving as a substrate.
The impact of microplastics on lake communities: A mesocosm study
Researchers conducted a mesocosm experiment to assess how microplastic contamination affects lake communities, including zooplankton, macroinvertebrates, and fish. They found that microplastic exposure caused varying effects across organism groups, with some community-level changes observed over the study period. The study highlights that microplastic pollution can alter freshwater ecosystem dynamics beyond what has been documented in single-species laboratory studies.
Effects of microplastics on bacterial communities in lake wetland sediments: a comparison between drought and flooded conditions
Researchers established a sediment microcosm system for Poyang Lake wetland and examined the effects of polyethylene and polypropylene microplastics on bacterial community structure, functional genes, and ecological processes over 180 days under both simulated drought and flooded conditions.
Microplastics-driven reconfiguration of organic carbon fractions in lake sediments: mineralization and stabilization dynamics of biodegradable polymers
Microplastics in soil were found to alter the composition and distribution of organic carbon fractions, with implications for soil fertility and carbon sequestration. The study reveals that microplastic contamination can reshape the biogeochemical cycling of carbon in terrestrial ecosystems.
Microplastic effects on soil organic matter dynamics and bacterial communities under contrasting soil environments
Researchers compared microplastic effects on soil organic matter dynamics and bacterial communities across contrasting soil environments, finding that the type of microplastic polymer and soil conditions together determine whether microbial activity and carbon cycling are stimulated or suppressed.
Discrepancy strategies of sediment abundant and rare microbial communities in response to floating microplastic disturbances: Study using a microcosmic experiment
Using microcosm experiments with fluvial sediment exposed to four plastic types, researchers found that floating microplastics altered sediment microbial diversity and reduced bacteria involved in carbon and nitrogen cycling. Abundant microbial taxa were more sensitive to microplastic disturbance than rare taxa, and microplastics decreased network complexity and increased negative species interactions in microbial communities.
Microbial biofilm formation and community structure on low-density polyethylene microparticles in lake water microcosms
Researchers investigated biofilm formation on low-density polyethylene microparticles in lake water microcosms, finding that microplastic surfaces supported distinct and dynamic microbial communities that differed from those in the surrounding water.
Effects of microplastics on greenhouse gas emissions and microbial communities in sediment of freshwater systems
Researchers found that PET microplastics of different sizes significantly affected greenhouse gas emissions and microbial communities in freshwater sediments, with smaller particles (5 micrometers) notably increasing methane emissions and altering nutrient cycling over 90 days.
Microplastics alter the microbiota-mediated phosphorus profiles at sediment-water interface: Distinct microbial effects between sediment and plastisphere
This study found that microplastics in lake sediments change how bacteria process phosphorus, a key nutrient in freshwater ecosystems. Both petroleum-based and biodegradable microplastics altered bacterial communities and phosphorus cycling, but in different ways depending on whether bacteria were in the sediment or on the plastic surfaces. These changes could contribute to water quality problems like algal blooms that affect both ecosystems and the drinking water supply.
Microbial carbon metabolism patterns of microplastic biofilm in the vertical profile of urban rivers
Researchers examined how microbial carbon metabolism in microplastic biofilms varies vertically through the water column of urban rivers, where plastic particles sink and accumulate at different depths. Biofilm metabolic function and community composition changed significantly with depth, suggesting that vertical transport of microplastics through the water column shapes distinct microbial carbon cycling niches in urban river ecosystems.
Polyethylene microplastics distinctly affect soil microbial community and carbon and nitrogen cycling during plant litter decomposition
Researchers measured how polyethylene microplastics affect soil microbial communities and carbon cycling in agricultural soils, finding that microplastic addition shifted microbial diversity and suppressed key carbon mineralization processes. The results suggest microplastic accumulation in farmland could impair soil carbon storage.
Plastic pollution in freshwater ecosystems: macro-, meso-, and microplastic debris in a floodplain lake
Researchers surveyed macro-, meso-, and microplastic debris in a South American floodplain lake and found an average of 704 microplastic particles per square meter in sediments, with plastic contamination comparable to marine beaches — demonstrating that freshwater lakes can be major plastic pollution reservoirs.
Microplastic-DerivedDissolved Organic Matter RegulatesSoil Carbon Respiration via Microbial Ecophysiological Controls
Researchers investigated how microplastic-derived dissolved organic matter influences soil carbon respiration, finding that carbon compounds leached from microplastics alter soil heterotrophic microbial ecophysiology and thereby affect carbon sequestration dynamics in contaminated soils.
Sediment bacterial and fungal communities exhibit distinct responses to microplastic types and sizes in Taihu lake
Researchers conducted microcosm experiments to study how polystyrene and polyethylene microplastics of different sizes affect sediment bacterial and fungal communities in Taihu Lake over 60 days. They found that microplastics reduced microbial diversity and significantly altered community structures, with particle size being the most influential factor. The study suggests that microplastic pollution in lake sediments may disrupt natural biogeochemical processes by shifting microbial community composition and network complexity.
Can Microplastic Pollution Change Important Aquatic Bacterial Communities?
Microplastics in coastal sediments can change the composition of important bacterial communities that cycle nutrients and maintain ecosystem health. Microplastic-associated bacteria differ significantly from natural sediment bacteria, with potential consequences for the chemical processes these communities perform.
Microplastics Increase the Risk of Greenhouse Gas Emissions and Water Pollution in a Freshwater Lake by Affecting Microbial Function in Biogenic Element Cycling: A Metagenomic Study
Researchers used metagenomic analysis to examine how microplastics affect microbial community function in a freshwater lake, finding that microplastic contamination disrupts biogenic element cycling processes and increases the risk of greenhouse gas emissions and water quality degradation.
Biofilms in plastisphere from freshwater wetlands: Biofilm formation, bacterial community assembly, and biogeochemical cycles
Researchers studied how bacteria form biofilms on microplastic surfaces in freshwater wetlands and found that these plastic-associated communities differ significantly from natural soil bacteria. The microplastic biofilms had lower diversity but higher activity in carbon processing and nitrogen cycling genes. This means microplastics in wetlands can alter natural nutrient cycles, potentially affecting water quality in ecosystems that many communities rely on.
Temporal dynamics of bacterial colonization on five types of microplastics in a freshwater lake
Researchers submerged five types of microplastics in a freshwater lake for about a year to study how bacterial communities colonize their surfaces over time. They found that different plastic types attracted distinct microbial communities, which changed significantly across seasons. The study reveals that microplastics serve as unique habitats for bacteria in freshwater, potentially influencing nutrient cycling and ecosystem dynamics.
Lacustrine plastisphere: Distinct succession and assembly processes of prokaryotic and eukaryotic communities and role of site, time, and polymer types
Researchers investigated how microbial communities colonize different types of microplastic polymers in freshwater lakes. The study found that bacteria and single-celled organisms follow distinct assembly patterns on microplastic surfaces, with colonization time, location, and polymer type all influencing community composition. These findings suggest microplastics serve as carriers that can promote microbial spread in aquatic environments.
Microplastic effects on carbon cycling processes in soils
Researchers reviewed how microplastics affect carbon cycling processes in soils, including their influence on microbial activity, plant growth, and litter decomposition. Since microplastics are themselves carbon-based materials, they can directly alter soil carbon stocks while also indirectly shifting microbial communities. The study calls for a major research effort to understand the widespread effects of microplastics on soil functioning and terrestrial ecosystem health.