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61,005 resultsShowing papers similar to Stream Microbial Community Structured by Trace Elements, Headwater Dispersal, and Large Reservoirs in Sub-Alpine and Urban Ecosystems
ClearFrom the Mountain to the Valley: Drivers of Groundwater Prokaryotic Communities along an Alpine River Corridor
Researchers sampled river water and groundwater from 59 sites along a 300 km transect of the Mur River valley in Austria and Slovenia, finding that dispersal limitation drives microbial community assembly at high altitudes while homogeneous selection dominates in lowland aquifers, with land use being a key determinant of groundwater microbiome composition throughout.
Cascade dams altered taxonomic and functional composition of bacterioplankton community at the regional scale
Researchers used 16S rRNA gene sequencing to investigate how cascade dams alter bacterioplankton community taxonomy and function at the regional scale in the Shaying River Basin, finding that dam-influenced zones created distinct environments with different community structures and interaction strengths compared to natural river sections.
Phytoplankton in headwater streams: spatiotemporal patterns and underlying mechanisms
Researchers compared phytoplankton communities in headwater streams to those in downstream plain rivers to understand patterns of algal diversity in less-impacted waterways. They found that headwater streams showed lower spatiotemporal variability in phytoplankton communities due to limited nutrients and strong water flow. The study reveals that these conditions actually promote greater phytoplankton diversity and provide new insights for ecological conservation of headwater ecosystems.
Spatial 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.
Partitional Clustering and Differential Abundance Analysis Reveal the Community Structure of eDNA in the Los Angeles River
Researchers used environmental DNA (eDNA) analysis and clustering methods to characterize microbial communities along the Los Angeles River. The study found that urbanization and concrete channel design significantly altered the biological communities compared to more natural river sections. Healthy, diverse river microbiomes can indicate water quality and ecosystem function relevant to understanding how pollution including microplastics affects aquatic life.
Stronger Geographic Limitations Shape a Rapid Turnover and Potentially Highly Connected Network of Core Bacteria on Microplastics
Core bacterial communities on microplastics were investigated across river ecosystems, revealing that geographic factors strongly limited microbial sharing between sites and that plastic-associated microbiota turned over rapidly along river gradients. The findings suggest that microplastics in rivers carry largely location-specific bacterial assemblages rather than universally dispersed communities.
Evaluation of the Influence of Habitat Heterogeneity and Human Activities on the Distribution of Microbial Diversity in a High Elevation Drop River
This is a freshwater microbiology study characterizing bacterial diversity in the Huotong River across different land-use zones in China; it is not a microplastics research paper.
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.
Bacterial Community Structure and Its Influencing Factors in Surface Sediments of the Nyang River in the Dry Season, China
Researchers analyzed bacterial community diversity in surface sediments of the Nyang River in Tibet using high-throughput sequencing, finding that climate warming and human activities along this plateau river have measurably shaped microbial composition and structure.
Longitudinal patterns of microplastic concentration and bacterial assemblages in surface and benthic habitats of an urban river
This study measured microplastic concentrations and microbial communities in a river from source to mouth, finding that both plastic levels and unique plastisphere bacterial communities increased downstream of wastewater treatment plant outflows. The results identify wastewater discharge as a key driver of both microplastic loading and microbial community shifts in rivers.
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.
Benthic Biofilm Bacterial Communities and Their Linkage with Water-Soluble Organic Matter in Effluent Receivers
Benthic biofilm bacterial communities and their associated water-soluble organic matter were characterized in rivers receiving wastewater treatment plant effluent, finding that effluent inputs shaped both the chemical composition of dissolved organic matter and the bacterial community structure of the biofilm. The study reveals tight coupling between wastewater-derived organic chemistry and the microbial ecology of downstream river biofilms.
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.
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.
The microbial community and functional indicators response to flow restoration in gradient in a simulated water flume
Researchers examined how microbial community structure and functional indicators respond to gradient flow restoration in a simulated water flume, finding that flow regime significantly influences river ecological systems including functional indicators and microbial community composition.
Bacterial signatures of anthropogenic pressures in a high-mountain river: a One Health study using full-length 16S profiling
Scientists studied bacteria in a Colombian mountain river and found that human activities like sewage discharge and industrial cooling dramatically changed the types of bacteria living in the water. Areas with more pollution had more harmful bacteria, including some linked to disease and antibiotic resistance. This research helps us understand how pollution affects water quality and could help communities better monitor and protect their water sources from health risks.
Spatiotemporal variability and key influencing factors of river fecal coliform within a typical complex watershed
Researchers monitored fecal coliform bacteria across 21 river sections in a mixed land-use watershed over 20 months and found that urbanization level explained spatial variation while environmental factors drove temporal dynamics, with rainfall events causing sharp short-term spikes in urban areas and landscape fragmentation of impervious surfaces amplifying non-point source bacterial export.
Microplastic in surface waters of urban rivers: concentration, sources, and associated bacterial assemblages
Researchers measured microplastic levels in the surface waters of the Chicago River and its urban tributaries, finding concentrations as high as 1.94 particles per cubic meter near wastewater outflows. They discovered that microplastic fibers and pellets were often colonized by bacterial communities distinct from those in the surrounding water. The study provides early evidence that urban rivers are significant conduits for microplastic pollution and that these particles may serve as rafts for microorganisms.
Urban non-point source pollutants cause microbial community homogenization via increasing deterministic processes
This study found that non-point source pollutants from urban areas homogenize microbial communities in rivers by increasing the dominance of deterministic processes over random ones. Microplastics from urban runoff are among the non-point source pollutants that can alter aquatic microbial diversity.
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.
Geographic Dispersal Limitation Dominated Assembly Processes of Bacterial Communities on Microplastics Compared to Water and Sediment
Researchers found that geographic dispersal limitation — rather than environmental filtering — was the dominant process shaping bacterial community assembly on microplastics in the Three Gorges Reservoir, distinguishing the 'plastisphere' microbiome from communities in surrounding water and sediment.
Anthropogenic Litter in Urban Freshwater Ecosystems: Distribution and Microbial Interactions
Researchers quantified anthropogenic litter in urban rivers and streams and found that microplastics dominated by mass and particle count compared to macroplastic items. The study highlights urban freshwater systems as major conduits for plastic pollution moving toward marine environments and documents distinct microbial communities on plastic surfaces.
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.
Spatial Persistence of Water Chemistry Patterns Across Flow Conditions in a Mesoscale Agricultural Catchment
This study found that spatial patterns in river water chemistry remain consistent across different flow conditions in an agricultural watershed. Persistent spatial patterns in pollution distribution could help predict where microplastics and other contaminants concentrate in river systems.