81,616 results match your criteria Aquatic Ecosystem Health & Management[Journal]

Internalization of polystyrene microplastics in Euglena gracilis and its effects on the protozoan photosynthesis and motility.

Aquat Toxicol 2021 Apr 18;236:105840. Epub 2021 Apr 18.

College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, P.R. China.

In this study, effects of polystyrene microplastics (MPS) on Euglena gracilis were investigated via examination on its photosynthesis and motility, two typical properties of the protozoan. No adverse effects were observed after 4-d exposure except for decrease in motility at two high MPS concentrations (5 and 25 mg/L). After 8-d duration, MPS at 1 mg/L had no obvious effects on E. Read More

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Ternary metal oxide embedded carbon derived from metal organic frameworks for adsorption of methylene blue and acid red 73.

Chemosphere 2021 Apr 28;280:130567. Epub 2021 Apr 28.

College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China. Electronic address:

Organic dyes can enter water bodies through industrial wastes and may pose a threat to the health of aquatic organisms and human. Metal organic framework derived carbon materials (CMOFs) have shown excellent performance for aqueous dye adsorption. However, few have studied multimetallic CMOFs for dye removal. Read More

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General statistical scaling laws for stability in ecological systems.

Ecol Lett 2021 May 4. Epub 2021 May 4.

Department of Physiological Diversity, Helmholtz Centre for Environmental Research (UFZ), Leipzig, Germany.

Ecological stability refers to a family of concepts used to describe how systems of interacting species vary through time and respond to disturbances. Because observed ecological stability depends on sampling scales and environmental context, it is notoriously difficult to compare measurements across sites and systems. Here, we apply stochastic dynamical systems theory to derive general statistical scaling relationships across time, space, and ecological level of organisation for three fundamental stability aspects: resilience, resistance, and invariance. Read More

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A Review of Water Quality Factors that Affect Nickel Bioavailability to Aquatic Organisms: Refinement of the Biotic Ligand Model for Nickel in Acute and Chronic Exposures.

Environ Toxicol Chem 2021 May 4. Epub 2021 May 4.

NiPERA, Durham, NC, 27713.

A review of nickel (Ni) toxicity to aquatic organisms was conducted to determine the primary water quality factors that affect Ni toxicity, and to provide information for the development and testing of a biotic ligand model (BLM) for Ni. Acute and chronic data for 66 aquatic species were compiled for this review. This review found that dissolved organic carbon (DOC) and hardness act as toxicity modifying factors (TMFs) because they reduced Ni toxicity to fish and aquatic invertebrates and these effects were consistent in acute and chronic exposures. Read More

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Dead or alive: microbial viability treatment reveals both active and inactive bacterial constituents in the fish gut microbiota.

J Appl Microbiol 2021 May 4. Epub 2021 May 4.

Faculty of Science Engineering and Built Environment, School of Life and Environmental Sciences, Deakin University, Geelong, Vic., Australia.

Aims: This study evaluated the microbial viability of fish gut microbiota in both digesta (faecal) and mucosal samples using a modified propidium monoazide (PMA) protocol, followed by 16S ribosomal RNA (rRNA) gene sequencing.

Methods And Results: Digesta and gut mucosal samples from farmed yellowtail kingfish (Seriola lalandi) were collected and a modified PMA treatment was applied prior to DNA extraction to differentiate both active and nonviable microbial cells in the samples. All samples were then sequenced using a standard 16S rRNA approach. Read More

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Investigating the spatial distribution of polychlorinated biphenyls in sediment in the Pearl River Delta, South China.

Environ Monit Assess 2021 May 4;193(6):321. Epub 2021 May 4.

Shunde Polytechnic, Foshan, 528300, China.

One hundred forty-three surface sediment (0-5 cm depth) samples were collected from locations representing industrialized areas, less-industrialized areas, and e-waste recycling areas in the Pearl River Delta (PRD). The spatial distribution of polychlorinated biphenyls (PCBs) and their potential adverse effects on aquatic organisms were investigated. The average PCB concentration in the less-industrialized areas (background) in the PRD was approximately 10 ng/g dry weight (dw), which was generally half that found in the industrialized areas (approximately 22 ng/g dw). Read More

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Exploring the vertebrate fauna of the Bird's Head Peninsula (Indonesia, West Papua) through DNA barcodes.

Mol Ecol Resour 2021 May 3. Epub 2021 May 3.

USR LEEISA- Laboratoire Ecologie, Interactions des Systèmes amazoniens, Centre de Recherche de Montabo, Evolution, BP 70620, 97334, French Guiana.

Biodiversity knowledge is widely heterogeneous across the Earth's biomes. Some areas, due to their remoteness and difficult access, present large taxonomic knowledge gaps. Mostly located in the tropics, these areas have frequently experienced a fast development of anthropogenic activities during the last decades and are therefore of high conservation concerns. Read More

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Global variation in freshwater physico-chemistry and its influence on chemical toxicity in aquatic wildlife.

Biol Rev Camb Philos Soc 2021 May 4. Epub 2021 May 4.

Biosciences, University of Exeter, Exeter, Devon, EX4 4QD, U.K.

Chemical pollution is one of the major threats to global freshwater biodiversity and will be exacerbated through changes in temperature and rainfall patterns, acid-base chemistry, and reduced freshwater availability due to climate change. In this review we show how physico-chemical features of natural fresh waters, including pH, temperature, oxygen, carbon dioxide, divalent cations, anions, carbonate alkalinity, salinity and dissolved organic matter, can affect the environmental risk to aquatic wildlife of pollutant chemicals. We evidence how these features of freshwater physico-chemistry directly and/or indirectly affect the solubility, speciation, bioavailability and uptake of chemicals [including via alterations in the trans-epithelial electric potential (TEP) across the gills or skin] as well as the internal physiology/biochemistry of the organisms, and hence ultimately toxicity. Read More

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Evolution reverses the effect of network structure on metapopulation persistence.

Ecology 2021 May 3:e03381. Epub 2021 May 3.

Department of Ecology, Evolution, and Natural Resources, Rutgers University, New Brunswick, NJ, USA.

Global environmental change is challenging species with novel conditions, such that demographic and evolutionary trajectories of populations are often shaped by the exchange of organisms and alleles across landscapes. Current ecological theory predicts that random networks with dispersal shortcuts connecting distant sites can promote persistence when there is no capacity for evolution. Here, we show with an eco-evolutionary model that dispersal shortcuts across environmental gradients instead hinder persistence for populations that can evolve because long-distance migrants bring extreme trait values that are often maladaptive, short-circuiting the adaptive response of populations to directional change. Read More

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Substrate vibrations and their potential effects upon fishes and invertebrates.

J Acoust Soc Am 2021 Apr;149(4):2782

PACSYS Ltd., Strelley Hall, Nottingham NG8 6PE, United Kingdom.

This paper reviews the nature of substrate vibration within aquatic environments where seismic interface waves may travel along the surface of the substrate, generating high levels of particle motion. There are, however, few data on the ambient levels of particle motion close to the seabed and within the substrates of lakes and rivers. Nor is there information on the levels and the characteristics of the particle motion generated by anthropogenic sources in and on the substrate, which may have major effects upon fishes and invertebrates, all of which primarily detect particle motion. Read More

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Microplastics are a hotspot for antibiotic resistance genes: Progress and perspective.

Sci Total Environ 2021 Jun 6;773:145643. Epub 2021 Feb 6.

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; Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China. Electronic address:

Antibiotic resistance genes (ARGs) and microplastics in the environment are of great public concern due to their potential risk to human health. Microplastics can form distinct bacterial communities and absorb pollutants from the surrounding environment, which provide potential hosts and exert possible selection pressure of ARGs. We provide a practical evaluation of the scientific literature regarding this issue. Read More

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Assessing pesticide uses with potentials for down-the-drain transport to wastewater in California.

Sci Total Environ 2021 Jun 5;773:145636. Epub 2021 Feb 5.

California Department of Pesticide Regulation, 1001 I Street, Sacramento, CA 95812, United States.

Pesticides and degradates are ubiquitously detected in municipal wastewater influent in the United States. However, little detailed information exists on their sources. The aim of this study is to investigate California Pesticide Use Report (PUR) and sales data to identify pesticide uses with a high potential for indoor down-the-drain (DtD) transport. Read More

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Trends in environmental and toxicity research on organic ultraviolet filters: A scientometric review.

Sci Total Environ 2021 Jun 5;773:145628. Epub 2021 Feb 5.

Centre for Environmental Sustainability and Remediation (EnSuRe), School of Science, RMIT University, Melbourne, Victoria 3000, Australia.

In recent decades, the potential toxicological and environmental effects of organic ultraviolet filters (OUVF) have received growing attention. The number of studies in this area has increased; however, presently there is no scientometric perspective addressing this topic. The purpose of this study is to identify the intellectual base and research front using the visualization and analysis software, CiteSpace. Read More

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Enzymatic degradation of polyethylene terephthalate nanoplastics analyzed in real time by isothermal titration calorimetry.

Sci Total Environ 2021 Jun 3;773:145111. Epub 2021 Feb 3.

Department of Environmental Microbiology, Helmholtz-Centre for Environmental Research - UFZ, Permoserstraße 15, D-04318 Leipzig, Germany. Electronic address:

Plastics are globally used for a variety of benefits. As a consequence of poor recycling or reuse, improperly disposed plastic waste accumulates in terrestrial and aquatic ecosystems to a considerable extent. Large plastic waste items become fragmented to small particles through mechanical and (photo)chemical processes. Read More

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Multi-region assessment of chemical mixture exposures and predicted cumulative effects in USA wadeable urban/agriculture-gradient streams.

Sci Total Environ 2021 Jun 4;773:145062. Epub 2021 Feb 4.

U.S. Geological Survey, Austin, TX, USA.

Chemical-contaminant mixtures are widely reported in large stream reaches in urban/agriculture-developed watersheds, but mixture compositions and aggregate biological effects are less well understood in corresponding smaller headwaters, which comprise most of stream length, riparian connectivity, and spatial biodiversity. During 2014-2017, the U.S. Read More

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Multiple stressors shape invertebrate assemblages and reduce their trophic niche: A case study in a regulated stream.

Sci Total Environ 2021 Jun 4;773:145061. Epub 2021 Feb 4.

Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622 Villeurbanne, France.

Few studies have addressed how the diversity of basal resources change with stream regulation and the potential consequences on river biota. We sampled invertebrates above and below a series of dams, over two years, at both downwelling and upwelling zones. In each zone, we recorded the daily temperature and flow variations, estimated the algal development, measured the available resources, and analysed carbon and nitrogen stable isotope compositions of the invertebrate community. Read More

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A review and assessment of the Shared-Pathway Hypothesis for the maintenance of signal honesty in red ketocarotenoid-based coloration.

Integr Comp Biol 2021 May 3. Epub 2021 May 3.

Department of Biological Sciences, Auburn University, Auburn, AL 36849 USA.

For decades, scientists have noted connections between individual condition and carotenoid-based coloration in terrestrial and aquatic animals. Organisms that produce more vibrant carotenoid-based coloration tend to have better physiological performance and behavioral displays compared to less colorful members of the same species. Traditional explanations for this association between ornamental coloration and performance invoked the need for color displays to be costly, but evidence for such hypothesized costs is equivocal. Read More

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Production of selenium-enriched microalgae as potential feed supplement in high-rate algae ponds treating domestic wastewater.

Bioresour Technol 2021 Apr 28;333:125239. Epub 2021 Apr 28.

GEMMA-Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya·BarcelonaTech, Jordi Girona 1-3, Building D1, 08034 Barcelona, Spain.

This study assessed the selenium (Se) removal efficiency of two pilot-scale high-rate algae ponds (HRAPs) treating domestic wastewater and investigated the production of Se-enriched microalgae as potential feed supplement. The HRAP-Se had an average Se, NH-N, total phosphorus and COD removal efficiency of, respectively, 43%, 93%, 77%, and 70%. Inorganic Se taken up by the microalgae was mainly (91%) transformed to selenoamino acids, and 49-63% of Se in the Se-enriched microalgae was bioaccessible for animals. Read More

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Perfluoroalkyl substances in drinking water sources along the Yangtze River in Jiangsu Province, China: Human health and ecological risk assessment.

Ecotoxicol Environ Saf 2021 Apr 30;218:112289. Epub 2021 Apr 30.

Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China; Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Ministry of Ecology and Environment, Nanjing 210042, China. Electronic address:

Perfluoroalkyl substances (PFASs) in source water is of growing concern for its adverse effects on human health and wildlife as well. The Yangtze River is the vital drinking water source in Jiangsu Province of China, but little attention has been paid on PFASs. The occurrence, spatial distribution and temporal trend of PFASs in 21 water sources along the Jiangsu section of the Yangtze River was investigated with sampling from 2018 to 2020. Read More

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Cadmium-induced toxicity to amphibian tadpoles might be exacerbated by alkaline not acidic pH level.

Ecotoxicol Environ Saf 2021 Apr 30;218:112288. Epub 2021 Apr 30.

College of Ecology, Lishui University, Lishui 323000, Zhejiang, China.

Heavy metal pollution in natural water bodies generally interacting with other environmental stressors produces toxic effects on aquatic organisms. However, toxicological studies exploring interactive effects of these stressors are still limited. Here, tadpoles of the Zhenhai brown frog (Rana zhenhaiensis) were exposed to a 3 × 3 factorial combination, with three cadmium (Cd) concentrations (0, 10 and 100 μg/L) and three pH levels (5. Read More

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Seagrass beds reveal high abundance of microplastic in sediments: A case study in the Baltic Sea.

Mar Pollut Bull 2021 Apr 30;168:112417. Epub 2021 Apr 30.

Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 5, 51014 Tartu, Estonia.

Microplastic (MPL) contamination in the marine environment is extensively studied yet little is known about the extent of MPL abundance in seagrass beds. The aim of this study was to evaluate MPL accumulation in coastal seagrass (Zostera marina) beds in the Baltic Sea, Estonia. Surface water was sampled by pumping using 40 μm plankton net, and sediments by trowel. Read More

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Identification of hazardous nanoparticles present in the Caribbean Sea for the allocation of future preservation projects.

Mar Pollut Bull 2021 Apr 30;168:112425. Epub 2021 Apr 30.

Faculdade Meridional, IMED, 304-, Passo Fundo, RS 99070-220, Brazil.

The deposition of remaining nanoparticles in the Caribbean Sea generates the formation of potentially dangerous elements, which influence at the imbalance of ecosystems. The detection of nanoparticles is not simple and the use of conventional methods is difficult application, which is why we highlight the immediacy and importance of this research for the areas of marine biology, urbanism, engineering and geosciences, applied in the Caribbean Sea. The general objective of this study is to evaluate the use of advanced methods for the determination of toxic nanoparticles, which can directly affect the development of marine organisms in the aquatic ecosystem in waters of the Caribbean Sea, favoring the construction of future international public policies with the elaboration of projects capable of mitigating these levels of contamination. Read More

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Environmental adaptation of E. coli within private groundwater sources in southeastern Ontario: Implications for groundwater quality monitoring and human health.

Environ Pollut 2021 Apr 28;285:117263. Epub 2021 Apr 28.

School of Environmental Studies, Queen's University, Kingston, Ontario, Canada; Public Health Ontario, Kingston, Ontario, Canada.

Groundwater quality monitoring typically employs testing for the presence of E. coli as a fecal indicator of recent ingress of human or animal fecal material. The efficacy of fecal indicator organisms is based on the primary criteria that the organism does not reproduce in the aquatic environment. Read More

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Effects of bisphenol A or diethyl phthalate on cartilage development and the swimming behavior of zebrafish (Danio rerio) through maternal exposure.

Comp Biochem Physiol C Toxicol Pharmacol 2021 Apr 30:109057. Epub 2021 Apr 30.

Department of Aquatic Biosciences, National Chiayi University, Chiayi 600, Taiwan. Electronic address:

Waterborne bisphenol A (BPA) and diethyl phthalate (DEP) are endocrine disruptive chemicals that impact the reproductive system of fish. The present study checks the effectiveness of the reproductive capacity on zebrafish after BPA and DEP exposure, and consequently investigates its effect on their development and the swimming behavior of its offspring. The exposure of BPA and DEP to zebrafish reveals that the levels of ovarian 17β-estradiol (E2) and relative mRNA expression (RRE) ratios (Treatment/Control) of hepatic vitellogenin (vtg1) could be induced and decreased. Read More

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Domestication affected stress and immune response markers in Perca fluviatilis in the early larval stage.

Fish Shellfish Immunol 2021 Apr 30. Epub 2021 Apr 30.

Department of Gametes and Embryo Biology, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Tuwima 10, 10-748 Olsztyn, Poland. Electronic address:

It is already known that domestication modifies stress and immune responses in juveniles and adults of several fish species. However, there is a lack of information on whether these modulations result from adaptability along the life cycle or if they are pre-determined in very early developmental stages. To shed light on mechanisms that help to explain the process of domestication, a study was conducted to analyze comparatively Eurasian perch larval performance, stress, and immune status between wild and domesticated specimens. Read More

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Dose-dependent co-infection of Argulus sp. and Aeromonas hydrophila in goldfish (Carassius auratus) modulates innate immune response and antioxidative stress enzymes.

Fish Shellfish Immunol 2021 Apr 30. Epub 2021 Apr 30.

Aquatic Environment and Health Management Division, ICAR- Central Institute of FisheriesEducation, Mumbai, 400061, Maharashtra, India. Electronic address:

Co-infection with parasites and bacteria is of frequent occurrence in aquaculture, leads to growth impedance otherwise mortality in fish depending on the varying degree of a load of primary pathogen either parasite or bacteria. The mechanistic regulation of immune response during co-infection in fish has merely documented.The aim of this study was to determine the impact of co-infection with Aeromonas hydrophila at three exposure doses of Argulus sp. Read More

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Inflammatory responses associated with hyposaline stress in gill epithelial cells of the spotted scat Scatophagus argus.

Fish Shellfish Immunol 2021 Apr 30. Epub 2021 Apr 30.

Shenzhen Key Laboratory of Marine Bioresource & Eco-environmental Science,College of Life Science,Shenzhen University,Shenzhen,China. Electronic address:

The molecular processes of immune responses in mucosal tissues such as fish gills under environmental stress are poorly understood. In the present study, pro-inflammatory response under hyposaline stress and its regulation by cortisol/corticosteroid receptors (CRs) in gill epithelial cells of the spotted scat Scatophagus argus were analyzed. The fish were transferred to freshwater for 6 days (144 hours) of acclimation. Read More

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Degradation of ester linkages in rice straw components by Sphingobium species recovered from the sea bottom using a non-secretory tannase-family α/β hydrolase.

Environ Microbiol 2021 May 3. Epub 2021 May 3.

Gunma University Center for Food Science and Wellness, 4-2 Aramaki, Maebashi, Gunma, 371-8510, Japan.

Microbial decomposition of allochthonous plant components imported into the aquatic environment is one of the vital steps of the carbon cycle on earth. To expand the knowledge of the biodegradation of complex plant materials in aquatic environments, we recovered a sunken wood from the bottom of Otsuchi Bay, situated in northeastern Japan in 2012. We isolated Sphingobium with high ferulic acid esterase activity. Read More

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Evaluation of the acute effects and oxidative stress responses of phenicol antibiotics and suspended particles in Daphnia magna.

Environ Toxicol Chem 2021 May 3. Epub 2021 May 3.

Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian, 361021, China.

Suspended particles (SP) exist widely in various water systems and are able to adsorb other pollutants in water, producing ecotoxic effects on aquatic non-target species. Till now, however, few studies have focused on the effects of SP on antibiotics. Therefore, this study aims to investigate the effects of the mixtures of SP and phenicol antibiotics (chloramphenicol: CAP; thiamphenicol: TAP) on acute toxicity and oxidative stress responses in Daphnia magna. Read More

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Analysis of recently duplicated TYRP1 genes and their effect on the formation of black patches in Oujiang-color common carp (Cyprinus carpio var. color).

Anim Genet 2021 May 3. Epub 2021 May 3.

Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, 201306, China.

Tyrp1 gene, as a member of the tyrosinase family, has undergone a recent duplication event during fourth-round whole genome duplication in common carp. In this research, three Tyrp1 genes were identified in Oujiang-color common carp (Cyprinus carpio var. color). Read More

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