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61,005 resultsShowing papers similar to [Response of Relationship Between Microplastic Abundance and Nitrogen Metabolism Function Microorganisms and Genes in Water].
ClearUnveiling microplastic's role in nitrogen cycling: Metagenomic insights from estuarine sediment microcosms
Researchers used metagenomic analysis to examine how polyethylene and polystyrene microplastics affect nitrogen cycling in estuarine sediments. They found that microplastics altered the abundance of genes involved in key nitrogen transformation processes like nitrification and denitrification. The study reveals that microplastic pollution in estuaries may disrupt important biogeochemical cycles that support aquatic ecosystem health.
Effects 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.
Microplastic biofilms as potential hotspots for plastic biodegradation and nitrogen cycling: a metagenomic perspective
Researchers used genetic analysis to study the microbial communities that form biofilms on different types of microplastics in an estuarine environment. They found that these plastic-associated communities contained genes for both plastic degradation and nitrogen cycling, suggesting the biofilms may play dual roles in the ecosystem. The study indicates that microplastic surfaces in waterways create unique microbial habitats that could influence both pollution breakdown and nutrient processing.
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.
Seasonal changes in N-cycling functional genes in sediments and their influencing factors in a typical eutrophic shallow lake, China
This study tracked seasonal changes in nitrogen-cycling bacteria in the sediments of a nutrient-rich lake in China, finding that key microbial processes shifted significantly between warmer and colder months. While focused on lake ecology rather than microplastics directly, the research is relevant because microplastics in lake sediments are known to alter microbial communities and nitrogen cycling processes. Understanding these baseline patterns helps scientists assess how microplastic contamination may further disrupt nutrient cycling in freshwater ecosystems.
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.
Mechanistic insights into the impact of multi-dimensional microplastic stress on nitrogen removal by heterotrophic nitrifying-aerobic denitrifying bacteria: A meta-transcriptomic analysis
Researchers studied how different types of microplastics affect bacteria that are used to remove nitrogen from wastewater. They found that PVC microplastics were particularly disruptive, interfering with enzyme function and gene expression needed for denitrification. The study provides molecular-level insights into how microplastic pollution could undermine biological wastewater treatment systems.
[Community Structure and Microbial Function Responses of Biofilms Colonizing on Microplastics with Vertical Distribution in Urban Water].
Biofilm communities colonizing microplastics at different depths in urban water bodies were found to differ significantly in community structure and metabolic function. Microplastics at different depths were exposed to varying light, oxygen, and nutrient conditions, which shaped the attached microbial communities. Understanding how microplastics host distinct microbial assemblages is important for assessing their role as vectors for pathogens and chemical pollutants.
Microplastics increase the microbial functional potential of greenhouse gas emissions and water pollution in a freshwater lake: A metagenomic study
A lab study found that adding common types of microplastics to freshwater lake water changed the microbial community in ways that could increase greenhouse gas production and water pollution. Microplastics, especially polyethylene, boosted genes involved in methane production and nitrogen loss from water. This suggests that microplastic pollution in lakes and reservoirs could have hidden environmental effects beyond direct toxicity, including contributing to climate change and degrading water quality.
Microplastics drive nitrification by enriching functional microorganisms in aquaculture pond waters
Researchers found that biofilms forming on microplastics in aquaculture pond water — known as the 'plastisphere' — enrich ammonia-oxidizing microorganisms, driving increased nitrification rates and altering the nitrogen cycle in ways not seen in surrounding water without microplastics.
Mechanistic insights into microplastic-mediated shifts in nitrogen metabolism and sensory quality across emergent and submerged-plant wetlands: Evidence from metagenomics and physiological indicators
Researchers exposed surface-flow constructed wetlands planted with emergent and submerged macrophytes to polystyrene microplastics and found a 12.64% reduction in total nitrogen removal in the emergent plant system, driven by shifts in nitrogen-cycling microbial communities. PS-MPs also altered sensory water quality indicators, with effects varying by plant type.
Microplastics perturb nitrogen removal, microbial community and metabolism mechanism in biofilm system
Researchers found that polystyrene and PET microplastics reduced total nitrogen removal by 7-16% in biofilm wastewater treatment systems by causing cell damage, altering microbial community structure, and suppressing key genes involved in denitrification and nitrogen conversion.
Non-synergistic effects of microplastics and submerged macrophytes on sediment microorganisms involved in carbon and nitrogen cycling
This study used genomic analysis to look at how polystyrene microplastics and aquatic plants (submerged macrophytes) together influence the microbial communities in lake sediments that control nutrient cycling. Rather than amplifying each other's effects, the two factors acted independently — microplastics increased microbial diversity while the plants shaped which metabolic functions dominated. The finding suggests that the ecological impact of microplastics in lakes cannot be predicted by looking at microplastics alone, without accounting for the vegetation already present.
Uniqueness and Dependence of Bacterial Communities on Microplastics: Comparison with Water, Sediment, and Soil
Researchers compared bacterial communities on microplastics with those in water, sediment, and soil in the Three Gorges Reservoir area, finding that microplastic-associated communities are unique in composition and ecological function compared to surrounding environments.
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.
Polystyrene microplastics induce microbial dysbiosis and dysfunction in surrounding seawater
Researchers used gene sequencing to study how polystyrene microplastics disrupt the microbial community and function in surrounding aquaculture water. The study found that microplastic exposure shifted the balance of beneficial and potentially harmful bacteria, altered nitrogen cycling pathways, and enriched antibiotic resistance genes, suggesting that microplastics in aquaculture settings could compromise water quality and ecosystem health.
Characteristics of microplastic pollution and analysis of colonized-microbiota in a freshwater aquaculture system.
Researchers found microplastics averaging 288.53 items per liter in freshwater aquaculture ponds in China, dominated by transparent fibers and cellulose particles, and discovered that bacterial communities on microplastic surfaces had significantly higher species richness and diversity than those in surrounding water. The plastisphere communities were enriched with Proteobacteria, including cellulose-degrading and potentially pathogenic species.
Response of microbial communities and biogeochemical cycling functions to sediment physicochemical properties and microplastic pollution under damming and water diversion projects
Researchers investigated how damming and water diversion projects affect microbial communities and biogeochemical cycling in reservoir sediments, with a focus on carbon, nitrogen, phosphorus, and sulfur cycle functional genes. They found that microplastic pollution in sediments interacted with these altered conditions to influence microbial function. The study highlights the complex interplay between infrastructure projects, microplastic contamination, and the microbial processes that drive nutrient cycling in freshwater systems.
Microplastics affect organic nitrogen in sediment: The response of organic nitrogen mineralization to microbes and benthic animals
Researchers investigated how different types of microplastics affect organic nitrogen cycling in sediments, measuring the responses of key nitrogen-transforming microorganisms. They found microplastics alter the composition of organic nitrogen and suppress certain nitrogen cycling processes.
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.
Disturbances of MPs on nitrogen in surface water: A case study of Chinese water bodies in the past three years
This study investigated whether the presence of microplastics in Chinese rivers and lakes correlates with nitrogen pollution — specifically ammonia nitrogen and total nitrogen levels. Analyzing water quality data collected over three years, the researchers found statistical associations suggesting that microplastics disturb nitrogen cycling in surface waters, potentially by affecting the microbial communities that process nitrogen compounds. Understanding this interaction matters because both microplastics and excess nitrogen are major threats to freshwater ecosystem health.
[Distribution Characteristics of Microplastic Surface Bacterial Communities Under Flooded and Non-flooded Conditions in Nanjishan Wetland of Poyang Lake].
A 16S sequencing study of bacterial communities in the Poyang Lake wetland found that microbial diversity on microplastic surfaces was lower than in surrounding sediment and water, with the microplastic biofilm community shifting between sediment-like (non-flooded) and water-like (flooded) profiles depending on water level. The plastisphere communities were dominated by distinct bacterial genera including elevated Proteobacteria, suggesting that microplastics select for specific microbial assemblages in natural wetland ecosystems.
In Situ Investigation of Plastic-Associated Bacterial Communities in a Freshwater Lake of Hungary
Researchers investigated plastic-associated bacterial communities on microplastic surfaces in a Hungarian freshwater lake, finding that the plastisphere harbored distinct microbial communities compared to surrounding water, including potential pathogens and plastic-degrading bacteria.
Effects of Microplastics on Microbial Community in Zhanjiang Mangrove Sediments
Researchers found that microplastics in mangrove sediments from Zhanjiang, China, altered the diversity and composition of microbial communities and may affect nitrogen cycling processes such as nitrification.