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61,005 resultsShowing papers similar to Spatial Distribution and Driving Factors of Nitrogen Cycle Genes in Urban Landscape Lake
ClearSpatial distribution and source apportionment of nitrogen in typical plain river networks and bacterial community response
This study characterized nitrogen types and bacterial community responses across typical plain river networks with different pollution sources (domestic, agricultural, aquaculture), finding that diverse nitrogen speciation in domestically polluted areas drove greater nitrogen cycling gene abundance and more complex bacterial ecological networks.
Metagenomics reveals the response of desert steppe microbial communities and carbon-nitrogen cycling functional genes to nitrogen deposition
Researchers used metagenomics to study how nitrogen deposition affects soil microbial communities and carbon-nitrogen cycling in desert steppe ecosystems. The study provides insights into how anthropogenic nitrogen inputs alter microbial functional gene expression, which can influence broader soil ecosystem processes.
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.
[Response of Relationship Between Microplastic Abundance and Nitrogen Metabolism Function Microorganisms and Genes in Water].
Researchers investigated the relationship between microplastic abundance and nitrogen-metabolizing microorganisms and genes in Lake Ulansuhai using microscopy and metagenomic sequencing, finding that microplastics in freshwater environments significantly influenced the composition and activity of nitrogen metabolism functional bacteria and associated genes.
Anthropogenic land uses shape denitrification-related microbial communities in freshwater river ecosystems
Researchers investigated how anthropogenic land uses (agricultural and urbanized) versus natural land uses shape denitrification-related microbial communities in the Weihe and Hanjiang Rivers in China's Qinling Mountains using deep 16S rRNA gene sequencing of water and sediment samples. Results revealed that land-use type significantly alters the composition and function of nitrogen-cycling microbial communities in freshwater river ecosystems.
Urbanization promotes specific bacteria in freshwater microbiomes including potential pathogens
Researchers used full-length 16S rRNA sequencing to compare freshwater microbial communities across urban and rural lakes in Germany, finding that urbanization consistently promoted specific bacterial genera including potential pathogens such as Escherichia/Shigella and Rickettsia, driven by warming, eutrophication, and wastewater inputs.
Effects of tire wear particles on freshwater bacterial-fungal community dynamics and subsequent elemental cycles using microcosms.
Researchers conducted freshwater microcosm experiments to assess how tire wear particles (TWPs) affect bacterial-fungal community dynamics and biogeochemical cycles in rural versus urban lake sediments and overlying water. They found TWPs altered microbial composition more strongly in water than sediment and increased bacteria-fungi network complexity, with cascading effects on nitrogen and carbon cycling.
Unveiling 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.
Abiotic and Biotic Effects on Microbial Diversity of Small Water Bodies in and around Towns
Metagenomic analysis of microbial communities in nine small urban water bodies across four seasons found that water quality had a greater influence on microbial community structure than habitat type, with alien species also contributing significantly to microbial diversity shifts.
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.
Urbanization promotes specific bacteria in freshwater microbiomes including potential pathogens
Urbanization significantly alters freshwater microbial communities, promoting potentially harmful bacterial groups including Escherichia/Shigella and Streptococcus in lakes near cities. Eutrophication driven by urban runoff creates conditions that favor pathogens, posing long-term public health risks as cities continue to grow.
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.
Spatial and Temporal Distribution of Bacterioplankton Molecular Ecological Networks in the Yuan River under Different Human Activity Intensity
Bacterioplankton co-occurrence networks in the Yuan River varied spatially and temporally with human activity intensity, with sites under heavy anthropogenic pressure showing simpler, less connected networks and reduced microbial diversity, suggesting that human disturbances destabilize aquatic microbial community interactions.
Water Bacterial and Fungal Community Compositions Associated with Urban Lakes, Xi’an, China
Bacterial and fungal communities in urban lakes in Xi'an, China were characterized, revealing diverse microbial assemblages influenced by nutrient levels and land use in the surrounding watershed. Understanding the microbial ecology of urban lakes provides context for how microplastic-associated microbial communities might interact with existing water quality challenges.
The Community Structure of eDNA in the Los Angeles River Reveals an Altered Nitrogen Cycle at Impervious Sites
Researchers used environmental DNA metabarcoding with six molecular markers to characterize bacterial, plant, fungal, fish, and invertebrate communities at concrete-lined and soft-bottom sites along the Los Angeles River, applying PCA and differential abundance analysis to reveal community structure. The study found that concrete-impervious sites were associated with altered nitrogen cycling driven by differential abundance of Proteobacteria.
Linking ecological niches to bacterial community structure and assembly in polluted urban aquatic ecosystems
Researchers examined how ecological niches shape bacterial community structure and assembly in polluted urban water ecosystems. The study found that the specific environmental conditions within different niches play a key role in determining how microbial communities respond to water pollution. These findings have implications for understanding microbial ecology and maintaining aquatic ecosystem health.
The Impact of Climate Change on Nitrogen Migration and Transformation in Inland Water Bodies: A Bibliometric Landscape Analysis
This review of over 2,600 studies found that climate change is creating a dangerous cycle with nitrogen pollution in lakes and rivers. As temperatures rise and weather patterns shift, nitrogen moves differently through water systems, which can worsen toxic algae blooms and release more greenhouse gases back into the atmosphere. This matters because it threatens our drinking water quality and makes climate change worse, showing why we need better strategies to manage nitrogen pollution as our planet warms.
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.
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.
Vegetation, salinity, and tides drive nitrogen cycling in Mangrove plastispheres
Researchers studied how microplastics affect nitrogen-cycling microbial communities in mangrove ecosystems under varying salinity and tidal conditions. They found that microplastic surfaces hosted distinct microbial communities with significantly higher abundances of nitrogen-cycling genes compared to surrounding soils. The study suggests that microplastics may act as hotspots for nitrogen transformation in mangrove environments, potentially disrupting natural nutrient cycling.
Identifying Microbial Distribution Drivers of Archaeal Community in Sediments from a Black-Odorous Urban River—A Case Study of the Zhang River Basin
This study investigated how urbanization, eutrophication, and heavy metal pollution shape archaeal (ancient microbial) community composition in sediments of blackened, odorous urban rivers. Understanding microbial responses to these stressors helps track the health of aquatic ecosystems heavily impacted by pollution, including microplastics.
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.
Phylogenetic distance–decay patterns are not explained by local community assembly processes in freshwater lake microbial communities
This paper is not about microplastics; it studies how environmental factors and spatial distance drive microbial community composition in freshwater lake water and sediment.
Study of Heavy Metals and Microbial Communities in Contaminated Sediments Along an Urban Estuary
Researchers studied heavy metal contamination and microbial community composition in estuarine sediments along an urban waterway, finding that urbanization-driven metal accumulation significantly altered microbial diversity and community structure.