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lakes, etc ; aquatic environment; microplastics; rayon; sediments; Show all 5 Subjects
Abstract:
... Microplastic accumulation in the lake aquatic environment has attracted worldwide attention, but the long-term deposition characteristics and influencing factors of microplastics are not clear. Hence, we attempted to analyze the factors that influence the accumulation of microplastics during the process of natural environmental change and social development through the method of the sedimentologic ...
lakes, etc ; complementary DNA; fluorescence; genes; genetically modified organisms; nopaline; thymine; Show all 7 Subjects
Abstract:
... In this paper, we have found that adjacent double-strand DNA (dsDNA) can enhance the fluorescence intensity of the G-triplex (G31)-thioflavin T (ThT) complex. By connecting the newly formed dsDNA with the G31 sequence, terminator nopaline synthase (TNOS) gene and Hg²⁺ were detected. The intermolecular duplex hybridization (e.g., TNOS gene and its complementary DNA), or the intramolecular mismatche ...
lakes, etc ; cold; dissolved oxygen; eutrophication; mathematical models; methane; methane production; sediments; sulfates; uncertainty; China; Show all 11 Subjects
Abstract:
... Clarifying the role of sulfate and dissolved oxygen (DO) in methane production may allow for precise and accurate modeling of methane emissions in eutrophic lakes. We conducted field observations of sulfate, methane, and DO concentrations in Lake Abashiri, a typical brackish and eutrophic lake in a cold region, to develop a DO-based method for quantitively estimating methane production in a eutrop ...
lakes, etc ; applied research; biodiversity; environment; groundwater; habitats; macrophytes; questionnaires; water flow; water management; Europe; Show all 11 Subjects
Abstract:
... The characterization of lake hydromorphology is crucial to understand the dynamics of biodiversity. In Europe, it is also a regulatory requirement of the Water Framework Directive. However, according to the literature, few methods include this characterization. The aim of this study is to review the state of the art of the methods currently used or under development in European countries to assess ...
lakes, etc ; Oncorhynchus; copper; environment; environmental impact; habitats; rivers; sediment contamination; sediments; trout; winter; British Columbia; Show all 12 Subjects
Abstract:
... Failures of mine tailings storage facilities (TSF) can have profound and long-lasting effects on the downstream receiving environment. Virtually all spills to date have been into river systems without large lakes that may buffer downstream impacts. In August 2014, the failure of the Mount Polley copper (Cu)-gold mine TSF in British Columbia, Canada, released ~25 × 10⁶ m³ of water and solids; globa ...
lakes, etc ; absorption; case studies; chemical oxygen demand; color; environment; models; satellites; water quality; China; Yangtze River; Show all 11 Subjects
Abstract:
... Chemical oxygen demand concentration (CCOD) is widely used to indicate the degree of organic pollution of lakes, reservoirs and rivers. Mastering the spatiotemporal distribution of CCOD is imperative for understanding the variation mechanism and controlling of organic pollution in water. In this study, a hybrid approach suitable for Sentinel 3A/Ocean and Land Colour Instrument (OLCI) data was deve ...
lakes, etc ; algae; dissolved organic matter; eutrophication; fluorescence; humification; ligands; mineralization; molecular weight; phosphorus; temperature; total phosphorus; China; Show all 13 Subjects
Abstract:
... The seasonal changes in dissolved organic matter (DOM), and its correlation with the release of internal nutrients during the annual cycle of cyanobacteria in the eutrophic Lake Chaohu, China, were investigated from four sampling periods between November 2020 and July 2021. The DOM fluorescence components were identified as protein-like C1, microbial humic-like C2, and terrestrial humic-like C3. T ...
lakes, etc ; Bayesian theory; case studies; data collection; ecosystems; environment; freshwater; models; phosphorus; poisonous algae; spring; uncertainty; Lake Erie; Show all 13 Subjects
Abstract:
... Ecological models help provide forecasts of ecosystem responses to natural and anthropogenic stresses. However, their ability to create reliable predictions requires forecasts with track records sufficiently long to build confidence, skill assessments, and treating uncertainty quantitatively. We use Lake Erie harmful algal blooms as a case study to help formalize ecological forecasting. Key challe ...
Mitchell L. Kay; Izabela Jasiak; Wynona H. Klemt; Johan A. Wiklund; Jelle A. Faber; Lauren A. MacDonald; James V.K. Telford; Cory A.M. Savage; Colin A. Cooke; Brent B. Wolfe; Roland I. Hall
lakes, etc ; antimony; arsenic; bitumen; floodplains; gold; highlands; nickel; oils; pollution; research; river deltas; sediments; temporal variation; vanadium; Alberta; Show all 16 Subjects
Abstract:
... Abundant reserves of metals and oil have spurred large-scale mining developments across northwestern Canada during the past 80 years. Historically, the associated emissions footprint of hazardous metal(loid)s has been difficult to identify, in part, because monitoring records are too short and sparse to have characterized their natural concentrations before mining began. Stratigraphic analysis of ...
lakes, etc ; Enterobacteriaceae; antibiotic resistance; antibiotic resistance genes; antibiotics; bacterial communities; biogeography; community structure; data collection; metagenomics; risk; sediments; stochastic processes; China; Show all 14 Subjects
Abstract:
... Lakes act as one of the reservoirs and dispersal routes of antibiotic resistance genes (ARGs) and pathogenic resistant bacteria in aquatic environments. Previous studies reported the occurrence and distribution of ARGs in lakes worldwide; however, few investigated the biogeography and diversity patterns of antibiotic resistome in the environment. To fill this gap, a large-scale data set of sedimen ...
lakes, etc ; agricultural pollution; bioavailability; biogeochemical cycles; esters; nuclear magnetic resonance spectroscopy; organic matter; orthophosphates; pH; principal component analysis; risk; rivers; sediments; China; Show all 14 Subjects
Abstract:
... Phosphorus (P) in sediments plays an important role in shallow lake ecosystems and has a major effect on the lake environment. The mobility and bioavailability of P primarily depend on the contents of different P forms, which in turn depend on the sedimentary environment. Here, sediment samples from Baiyangdian (BYD) lake were collected and measured by the Standards, Measurements, and Testing proc ...
... Psychoactive substances have been identified as a kind of emerging contaminants in aquatic environment and pose potential adverse effects on aquatic animals. Yangtze finless porpoise, a critically endangered species in China, is also facing the threat of psychoactive substances. In this study, the accumulation characteristics and risk prioritization of psychoactive substances were investigated in ...
lakes, etc ; carbon; catechol; chemical species; cupric oxide; electrochemistry; electrodes; electron transfer; nanocomposites; nanocrystals; oxidation; photochemistry; porous media; research; river water; surface area; titanium dioxide; Show all 17 Subjects
Abstract:
... Creating mesoporous architecture on the surface of metal oxides without using pore creating agent is significant interest in electrochemical sensors because these materials act as an efficient electron transfer process between the electrode interface and the analytes. Recent advances in mesoporous titanium dioxide (TiO₂)-based materials have acquired extraordinary opportunities because of their in ...
lakes, etc ; Daphnia magna; Gammarus fossarum; acute toxicity; aggregation behavior; benthic organisms; dose response; environment; mineral water; nanoplastics; neonates; pH; plankton; polystyrenes; principal component analysis; risk assessment; Show all 16 Subjects
Abstract:
... Despite progress in evaluation of risk assessment, knowledge gaps largely exist understanding the toxicity of nanoplastics in aquatic systems considering nanoplastics surface properties, environmental media characteristics and species ecological traits. In this study, amidine - functionalized polystyrene nanoparticles (PS-NPLs) of 20, 40, 60 and 100 nm are considered using Geneva lake water and mi ...
lakes, etc ; chlorophyll; macrophytes; microcystins; nitrates; nitrogen; orthophosphates; phosphorus; phytoplankton; pollution; public health; risk; risk assessment; sediments; total nitrogen; total organic carbon; total phosphorus; water management; China; Show all 19 Subjects
Abstract:
... Understanding the history of microcystins (MCs) pollution in large lakes can help inform future lake management. We collected sediment cores from Lake Taihu to: investigate the long-term record of MCs (MC-LR, MC-YR, and MC-RR), explore the main environmental drivers of MCs, and assess their public health and ecological risks. Results showed that MCs content in all cores increased over time. The co ...
lakes, etc ; 2-methylisoborneol; Ceratophyllum demersum; Hydrilla verticillata; Myriophyllum spicatum; Potamogeton crispus; Pseudanabaena; Vallisneria; algae; cell growth; freshwater; macrophytes; metabolism; nutrient uptake; odors; off flavors; pioneer species; risk; water quality; Show all 19 Subjects
Abstract:
... The off-flavor compound 2-methylisoborneol (2-MIB) is generally associated with the proliferation and metabolism of filamentous cyanobacteria in shallow freshwater ecosystems. Here field monitoring in East Taihu Lake from July to October 2021, along with cultural experiments, was conducted to determine the impact of submerged macrophytes on the growth and 2-MIB production of filamentous cyanobacte ...
lakes, etc ; Actinobacteria; Bacteroidetes; Cyanobacteria; Firmicutes; Planctomycetes; Proteobacteria; ammonium nitrogen; aquatic environment; bacterial communities; community structure; enzymes; genes; nutrient content; rivers; summer; surface water; temperature; total nitrogen; total organic carbon; total phosphorus; China; Show all 22 Subjects
Abstract:
... The temporal and spatial characteristics of urban river bacterial communities help us understand the feedback mechanism of bacteria to changes in the aquatic environment. The Fuhe River plays an important role in determining the water ecological environment of Baiyangdian Lake. 16S rRNA gene sequencing was used to study the microbial distribution characteristics in the Fuhe River in different seas ...
... Two new nematode species of the genus Eudorylaimus Andrássy, 1959 found in Lake El’gygytgyn (Chukotka, Russia)—E. chukotkanus sp. n. and E. mylnikovi sp. n.—are described and illustrations are provided. E. chukotkanus sp. n. is close to E. similis (de Man, 1876) and E. imitatoris Gagarin, 1982. It differs from both species by a longer body and odontostyle, comparatively longer prerectum, longer sp ...
... The article presents the results of geochemical studies of Lake Onego. The chemical composition of the water was investigated, the uneven distribution of elements (Fe, Mn, Al, Cu, Zn, and Cr) and the forms of their migration along the lake water area were revealed. It is shown that the suspended form of metals prevails in bays exposed to an anthropogenic load. The study of the chemical composition ...
... Sustaining environmental flows (e‐flows) is a basic requirement for river, lake and marsh management. Rivers, lakes and marshes have close hydrological and ecological connections in a river basin, and form river–lake‐marsh systems. Any measure that is designed to address problems related to only one of these water bodies in isolation of the others may lead to unexpected, undesired and sub‐optimal ...