92,517 results match your criteria Aquatic Ecosystem Health & Management[Journal]

Molecular and morphological characterization of Dollfustrema bagarii (Digenea: Bucephalidae) metacercariae from aquaculture channel catfish (Ictalurus punctatus) in northern Vietnam.

J Fish Dis 2022 May 21. Epub 2022 May 21.

Department of Parasitology and Aquatic Diseases, Institute of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark.

White grub metacercariae were found in the livers and kidneys of diseased specimens of an introduced channel catfish, Ictalurus punctatus (Rafinesque), in Vietnam. Based on morphological features and 28S rDNA sequence analysis, the isolated metacercariae were identified as Dollfustrema bagarii (Digenea: Bucephalidae) Moravec & Sey. Histopathological examination shows that encysted metacercariae can change the tissue structure of the infected organs and is often accompanied by haemorrhaging and the presence of eosinophilic granular cell infiltration. Read More

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Essential oils loaded on polymeric nanoparticles: bioefficacy against economic and medical insect pests and risk evaluation on terrestrial and aquatic non-target organisms.

Environ Sci Pollut Res Int 2022 May 21. Epub 2022 May 21.

INBIOSUR, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS) - CONICET, B8000CPB, Buenos Aires, Argentina.

This paper introduces the lethal, sublethal, and ecotoxic effects of peppermint and palmarosa essential oils (EOs) and their polymeric nanoparticles (PNs). The physicochemical analyses indicated that peppermint PNs were polydisperse (PDI > 0.4) with sizes of 381 nm and loading efficiency (LE) of 70. Read More

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The role of microplastics biofilm in accumulation of trace metals in aquatic environments.

World J Microbiol Biotechnol 2022 May 22;38(7):117. Epub 2022 May 22.

International Clean Water Institute, Manassas, VA, USA.

Microplastics are one of the major contaminants of aquatic nature where they can interact with organic and inorganic pollutants, including trace metals, and adsorb them. At the same time, after the microplastics have entered the aquatic environments, they are quickly covered with a biofilm - microorganisms which are able to produce extracellular polymeric substances (EPS) that can facilitate sorption of trace metals from surrounding water. The microbial community of biofilm contains bacteria which synthesizes EPS with antimicrobial activity making them more competitive than other microbial inhabitants. Read More

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Toxic effects of polystyrene nanoplastics and polybrominated diphenyl ethers to zebrafish (Danio rerio).

Fish Shellfish Immunol 2022 May 18. Epub 2022 May 18.

College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China; Institute of Eco-Environmental Research, Guangxi Academy of Sciences, Nanning, 530007, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangzhou, 510006, China. Electronic address:

Nanoplastics (NPs) are good carriers of persistent organic pollutants (POPs) such as polybrominated diphenyl ethers (PBDEs), and can alter their bioavailability and toxic impacts to aquatic organisms. This study highlights the single and combined toxic effects of polystyrene nanoplastics (PS-NPs) and 2,2',4,4'-tetrabromodiphenyl ether (BDE-47, one of the dominant congeners of PBDEs) on zebrafish embryos after an exposure duration of up to 120 hpf. Results showed that PS-NPs and BDE-47 co-exposure exacerbated the morphological deformities in terms of pericardial edema, yolk sac edema and curved tail in zebrafish larvae. Read More

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Nutrient levels and prokaryotes affect viral communities in plateau lakes.

Sci Total Environ 2022 May 18:156033. Epub 2022 May 18.

Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming 650091, China. Electronic address:

Viruses are the most abundant organisms in aquatic environments. Recent advances of viral metagenomic have greatly expanded our understanding of aquatic viral communities. However, little is known about the difference of viral communities and driving factors in freshwater lake. Read More

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Salt marshes as the final watershed fate for meso- and microplastic contamination: A case study from Southern Brazil.

Sci Total Environ 2022 May 18:156077. Epub 2022 May 18.

Laboratório de Microcontaminantes Orgânicos e Ecotoxicologia Aquática, Instituto de Oceanografia da Universidade Federal do Rio Grande (FURG), Av. Itália, Km 8, Carreiros, CEP: 96203-900 Rio Grande, RS, Brazil.

Plastics pose a major threat to aquatic ecosystems especially in smaller size fractions. Salt marshes play a crucial role in maintaining the coastal zone and aquatic food web, yet their contamination, including by plastic materials, is still poorly investigated. This work investigated meso- (MEP, 5-25 mm) and microplastic (MIP, 1 μm-5 mm) contamination of a salt marsh, which reached average levels of 279. Read More

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Backgrounds as a potentially important component of riverine nitrate loads.

Sci Total Environ 2022 May 18:155999. Epub 2022 May 18.

Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; Center of Plant Ecology, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China. Electronic address:

Nitrate (NO) is a major trigger for river eutrophication. While efforts have been made to understand the anthropogenic NO pollution in rivers, the role of background NO in determining NO loads remains to be studied. In this study, we used dual-isotopes (δN/δO-NO) and an isotope-mixing model to reveal the natural and anthropogenic processes regulating the NO loads in a forest river that acts as a headwater source for the China's South to North Water Transfer Project. Read More

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Interrelation between macrophytes roots and cathode in constructed wetland-microbial fuel cells: Further evidence.

Sci Total Environ 2022 May 18:156071. Epub 2022 May 18.

Department of Ecology, Institute of Hydrobiology, Jinan University, Guangzhou 510632, PR China; Engineering Research Center of Tropical and Subtropical Aquatic Ecological Engineering, Ministry of Education, Guangzhou, PR China. Electronic address:

As an essential component in constructed wetland-microbial fuel cells (CW-MFC) system, the macrophytes play multiple roles in bioelectricity generation and decontaminants performance. However, the interrelation between macrophytes roots and cathode has not been fully investigated despite the fact that plant cultivation strategy is a critical issue in practice. For the first time, this study was designed to explore the interaction between macrophytes and cathode in CW-MFC by planting Cyperus altrnlifolius at relatively different positions from the cathode. Read More

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Comparison of the formation of N-nitrosodimethylamine (NDMA) from algae organic matter by chlor(am)ination and UV irradiation.

Sci Total Environ 2022 May 18:156078. Epub 2022 May 18.

Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control, College of Civil Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China; Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun 130118, PR China. Electronic address:

Microcystis aeruginosa (M. aeruginosa, blue-green algae) blooms frequently in drinking water reservoirs and subsequently causes the formation of disinfection by-products (DBPs) after disinfection, which may pose a potential health risk. In this study, the formation of N-nitrosodimethylamine (NDMA) was evaluated from algal organic matter (AOM) including extracellular organic matter (EOM) and intracellular organic matter (IOM) during the disinfection process of chlorination, chloramination, or ultraviolet (UV) irradiation. Read More

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Validation and application of diffusive gradient in thin-film (DGT) equipped novel cyclodextrin polymer gels for monitoring endocrine disrupting chemicals (EDCs) and environmental risk assessment in the Taihu lake basin.

Environ Res 2022 May 18:113391. Epub 2022 May 18.

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, PR China; Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources Environmental & Chemical Engineering, Nanchang University, Nanchang, 330031, China; Jiangxi Nanxin Environmental Protection Technology Co. LTD, Jiujiang City of Jiangxi Province, 330300, China. Electronic address:

Taihu Lake is the most important drinking water source of the major cities in the Yangtze River Delta. The pollution of endocrine disruptors (EDCs)in Taihu Lake has been increasing recently, the accurate determination is an important guide for predicting its health risks and developing appropriate controls. Monitoring organic pollutants in water using the diffusive gradient in thin film technique (DGT) has attracted much attention due to more accuracy and convenience than the grab sampling methods. Read More

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High-temperature stress will put the thermo-sensitive teleost yellow catfish (Tachysurus fulvidraco) in danger through reducing reproductivity.

Ecotoxicol Environ Saf 2022 May 18;239:113638. Epub 2022 May 18.

College of Fisheries, Engineering Research Center of Green development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Huazhong Agricultural University, Wuhan, PR China. Electronic address:

Recently, concerns for species that sex differentiation is influenced by temperature in the context of global warming have increased because disrupted operational sex ratios could threaten population maintenance. In contrast, little attention has been given to the reproductive ability of populations that experienced elevated temperatures. In this study, we demonstrated that high temperature (HT) would decrease population size via three different aspects of reproductive ability for the first time. Read More

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Multi-mineral fingerprinting analysis of the Chinese mitten crab (Eriocheir sinensis) in Yangcheng Lake during the year-round culture period.

Food Chem 2022 May 7;390:133167. Epub 2022 May 7.

Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China; Key Laboratory of Fishery Ecological Environment Assessment and Resource Conservation in Middle and Lower Reaches of the Yangtze River, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China. Electronic address:

Chinese mitten crabs (Eriocheir sinensis), originating from Yangcheng Lake, are valuable aquatic products in China. To characterize changes in nutrients in this species in Yangcheng Lake during the year-round culture period, the contents of ten mineral elements in the third pereiopod were evaluated. Principal component analysis revealed that mineral elements changed substantially in the first three months. Read More

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Occurrence, contamination level and ecological risk assessment of dissolved and particulate trace elements in rivers entering the southwestern Mediterranean Sea.

Mar Pollut Bull 2022 May 18;180:113723. Epub 2022 May 18.

Aix-Marseille University, CNRS, IRD, INRA, Coll France, CEREGE, Aix-en-Provence, France.

Metal pollution in rivers should not be overlooked before their entry into the sea. However, there are few studies for estimating such contamination in rivers entering the Algerian coastal waters. Semimonthly quantification of dissolved and particulate metals, near the mouths of two industrial-tainted rivers, El Harrach and Mazafran rivers, was carried out during a period of one year. Read More

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Fate of face masks after being discarded into seawater: Aging and microbial colonization.

J Hazard Mater 2022 May 5;436:129084. Epub 2022 May 5.

Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060 Guangdong, China. Electronic address:

Billions of discarded masks have entered the oceans since the outbreak of the COVID-19 pandemic. Current reports mostly discuss the potential of masks as plastic pollution, but there has been no study on the fate of this emerging plastic waste in the marine environment. Therefore, we exposed masks in natural seawater and evaluated their aging and effects on the microbial community using a combination of physicochemical and biological techniques. Read More

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Responses of submerged macrophyte Ceratophyllum demersum to the gradient concentrations of microcystin-LR (MC-LR).

Environ Sci Pollut Res Int 2022 May 21. Epub 2022 May 21.

College of Fisheries, Henan Normal University, Xinxiang, Henan, People's Republic of China, 453007.

The responses of Ceratophyllum demersum to gradient concentrations (0, 0.8, 3.2, and 10 µg/L) of microcystin-LR (MC-LR) were comprehensively investigated by laboratory simulation experiments. Read More

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Community structure and function of microbiomes in polluted stretches of river Yamuna in New Delhi, India, using shotgun metagenomics.

Environ Sci Pollut Res Int 2022 May 21. Epub 2022 May 21.

Indian Council of Agricultural Research, New Delhi, India.

The large population residing in the northern region of India surrounding Delhi mostly depends on water of River Yamuna, a tributary of mighty Ganga for agriculture, drinking and various religious activities. However, continuous anthropogenic activities mostly due to pollution mediated by rapid urbanization and industrialization have profoundly affected river microflora and their function thus its health. In this study, potential of whole-genome metagenomics was exploited to unravel the novel consortia of microbiome and their functional potential in the polluted sediments of the river at Delhi. Read More

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Considering Fish as Recipients of Ecosystem Services Provides a Framework to Formally Link Baseline, Development, and Post-operational Monitoring Programs and Improve Aquatic Impact Assessments for Large Scale Developments.

Environ Manage 2022 May 21. Epub 2022 May 21.

Canadian Rivers Institute, University of New Brunswick, Fredericton, NB, Canada.

In most countries, major development projects must satisfy an Environmental Impact Assessment (EIA) process that considers positive and negative aspects to determine if it meets environmental standards and appropriately mitigates or offsets negative impacts on the values being considered. The benefits of before-after-control-impact monitoring designs have been widely known for more than 30 years, but most development assessments fail to effectively link pre- and post-development monitoring in a meaningful way. Fish are a common component of EIA evaluation for both socioeconomic and scientific reasons. Read More

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A melting cryosphere constrains fish growth by synchronizing the seasonal phenology of river food webs.

Glob Chang Biol 2022 May 21. Epub 2022 May 21.

Pacific Northwest Research Station, USDA Forest Service, Juneau, Alaska.

Mountain watersheds often contain a mosaic of glacier-, snow-, and rain-fed streams that have distinct hydrologic, temperature, and biogeochemical regimes. However, as glaciers diminish and precipitation shifts from snow to rain, the physical and chemical characteristics that make glacial or snowmelt streams distinct from rain-fed streams will fade. Among the unforeseen consequences of this hydrologic homogenization could be the loss of unique food webs that sustain aquatic consumers. Read More

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Mitochondrial PEP Carboxylase contributes to carbon fixation in the diatom Phaeodactylum tricornutum at low inorganic carbon concentrations.

New Phytol 2022 May 21. Epub 2022 May 21.

Fachbereich Biologie, Universität Konstanz, 78457, Konstanz, Germany.

Photosynthetic carbon fixation is often limited by CO availability, which led to the evolution of CO concentrating mechanisms (CCMs). Some diatoms possess CCMs that employ biochemical fixation of bicarbonate, similar to C plants, but it is controversially discussed whether biochemical CCMs are a commonly found in diatoms. In the diatom Phaeodactylum tricornutum, Phosphoenolpyruvate Carboxylase (PEPC) is present in two isoforms, PEPC1 in the plastids and PEPC2 in the mitochondria. Read More

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Life cycle assessment of a wind farm in Turkey.

Environ Sci Pollut Res Int 2022 May 20. Epub 2022 May 20.

Environmental Engineering Department, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey.

The aim of this study is to investigate the environmental impacts of a full-scale wind farm using life cycle assessment methodology. The facility in question is an onshore wind farm located in Turkey with a total installed capacity of 47.5 MW consisting of 2. Read More

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Gene flow in a pioneer plant metapopulation (Myricaria germanica) at the catchment scale in a fragmented alpine river system.

Sci Rep 2022 May 20;12(1):8570. Epub 2022 May 20.

Swiss Federal Institute for Forest, Snow and Landscape Research, WSL, Zürcherstrasse 111, 8903, Birmensdorf, Switzerland.

River alterations for natural hazard mitigation and land reclamation result in habitat decline and fragmentation for riparian plant species. Extreme events such as floods are responsible for additional local species loss or population decline. Tributaries might provide refugia and subsequent source populations for the colonization of downstream sites in connected riverine networks with metapopulations of plant species. Read More

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Reply to "Marine abundance and its prehistoric past in the Baltic".

Nat Commun 2022 May 20;13(1):2824. Epub 2022 May 20.

School of Geography, Politics and Sociology, Newcastle University, Newcastle upon Tyne, UK.

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Palate evolution in early-branching crocodylomorphs: Implications for homology, systematics, and ecomorphology.

Anat Rec (Hoboken) 2022 May 20. Epub 2022 May 20.

Evolutionary Studies Institute, University of Witwatersrand, Johannesburg, South Africa.

Living crocodylomorphs have an ossified secondary palate with a posteriorly positioned choana that enables their semi-aquatic, predatory ecology. In contrast, the earliest branching members of Crocodylomorpha have an open palate with anteriorly positioned choanae. The evolution of an ossified secondary palate and a posteriorly positioned choana features strongly in hypotheses of broad-scale phylogenetic relationships within Crocodylomorpha. Read More

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Open Hardware in Science: The Benefits of Open Electronics.

Integr Comp Biol 2022 May 20. Epub 2022 May 20.

Chapman University, Environmental Science and Policy Program, 1 University Drive, Orange, CA 92866, USA.

Openly shared low-cost electronic hardware applications, known as open electronics, have sparked a new open-source movement, with much untapped potential to advance scientific research. Initially designed to appeal to electronic hobbyists, open electronics have formed a global "maker" community and are increasingly used in science and industry. In this perspective article we review the current costs and benefits of open electronics for use in scientific research ranging from the experimental to the theoretical sciences. Read More

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Controlling factors of microplastic fibre settling through a water column.

Sci Total Environ 2022 May 17:156011. Epub 2022 May 17.

Environmental Engineering, School of Civil Engineering, The University of Sydney, Sydney, New South Wales, Australia; Sydney Institute of Agriculture, Carbon, Soil and Water, The University of Sydney, Australia.

Microplastic fibres are the most abundant microplastics in waterways worldwide. The settling of fibres is distinct from other particles because of their aspect ratio and shape. In this paper, we test the hypothesis that length, curliness, and settling orientation control the settling velocity of microplastic fibres in a suite of laboratory experiments. Read More

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Receptor model-oriented sources and risks evaluation of metals in sediments of an industrial affected riverine system in Bangladesh.

Sci Total Environ 2022 May 17:156029. Epub 2022 May 17.

University of Chinese Academy of Sciences, Beijing 100049, China; Aquatic Eco-Health Group, Fujian Key Laboratory of Watershed Ecology, Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.

Toxic metals in river sediments may represent significant ecological concerns, although there has been limited research on the source-oriented ecological hazards of metals in sediments. Surface sediments from an industrial affected Rupsa River were utilized in this study to conduct a complete investigation of toxic metals with source-specific ecological risk assessment. The findings indicated that the average concentration of Ni, Cr, Cd, Zn, As, Cu, Mn and Pb were 50. Read More

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Nano Pd doped Ni foam electrode stimulated electrochemical reduction of tetrabromobisphenol A: Optimization strategies and function mechanism.

Sci Total Environ 2022 May 17:156007. Epub 2022 May 17.

State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address:

Tetrabromobisphenol A (TBBPA), a hazardous and persistent flame retardant, has been widely detected in the natural aquatic system. The acceleration of reductive debromination (rate-limiting process) is vital during the decomposition and detoxification of TBBPA. This study achieved superior TBBPA electrochemical reductive debromination performance by nano Pd doped Ni foam electrode (4. Read More

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Long non-coding RNA LTCONS7822 positively regulates innate immunity by targeting MITA in miiuy croaker (Miichthys miiuy).

Fish Shellfish Immunol 2022 May 17. Epub 2022 May 17.

Laboratory of Fish Molecular Immunology, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China; Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Shanghai Ocean University), Ministry of Education, China; National Pathogen Collection Center for Aquatic Animals, Shanghai Ocean University, China. Electronic address:

Accumulated studies have shown that long non-coding RNA (lncRNA) is considered a critical regulatory factor in mammals, with a length greater than 200 nucleotides, and it can participate in gene imprinting, dose compensation, transcription enhancement, and antisense regulation. Most of the above studies are carried out in mammals, and there are very few studies on lncRNA of lower vertebrates. Here, we report a novel lncRNA, LTCONS7822, which can play a positive regulatory effect on antiviral immunity in miiuy croaker, Miichthys miiuy. Read More

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cMOS enhanced the mucosal immune function of skin and gill of goldfish (Carassius auratus Linnaeus) to improve the resistance to Ichthyophthirius multifiliis infection.

Fish Shellfish Immunol 2022 May 17. Epub 2022 May 17.

Department of Aquaculture, College of Animal Science & Technology, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China.

Methods: of supporting mucosal immune barrier integrity and prevention of some pathogenic infections in aquatic species, are key areas of active study, often focusing on feed additives. The objectives of this study were to explore the effects of feeding cMOS (concentrated mannan oligosaccharide) on the gill and skin mucosal barriers of goldfish (Carassius auratus Linnaeus) and evaluate health status during Ichthyophthirius multifiliis infection. After feeding the cMOS-containing diet for 60 days, Hematoxylin and eosin (H&E) staining showed greater length of gill lamella and thicker dermal dense layer, while Alcian Blue and Periodic acid-Schiff (AB-PAS) staining showed higher numbers of mucin cells in cMOS fed fish. Read More

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The interplay between atmospheric deposition and soil dynamics of mercury in Swiss and Chinese boreal forests: A comparison study.

Environ Pollut 2022 May 17:119483. Epub 2022 May 17.

State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China; Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xian, 710061, China. Electronic address:

Taking advantage of the different histories of Hg deposition in Davos Seehornwald in E-Switzerland and Changbai Mountain in NE-China, the influence of atmospheric deposition on Hg soil dynamics in forest soil profiles was investigated. Today, Hg fluxes in bulk precipitation were similar, and soil profiles were generally sinks for atmospherically deposited Hg at both sites. Noticeably, a net release of 2. Read More

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