72,474 results match your criteria Aquatic Living Resources[Journal]


Oxidation of salicylic acid in water by the O and UV/O processes: removal and reaction byproducts.

Water Sci Technol 2020 Feb;81(4):753-762

School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China E-mail:

In this study, the removal of salicylic acid (SA) in water by ozone (O) and ultraviolet/ozone (UV/O) processes was investigated. Results showed that more than 50% of SA (10 mg/L) could be effectively removed after 1 min during these two processes. However, the UV/O process was much more effective than the O process for SA mineralization, and the total organic carbon reduction after 30 min was 69. Read More

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http://dx.doi.org/10.2166/wst.2020.155DOI Listing
February 2020

Occurrences of benzalkonium chloride in streams near a pharmaceutical manufacturing complex in Korea and associated ecological risk.

Chemosphere 2020 May 18;256:127084. Epub 2020 May 18.

School of Public Health, Seoul National University, Seoul, 08826, Republic of Korea. Electronic address:

Benzalkonium chloride (BKC) is a commonly used preservative in personal care products and pharmaceutical preparations. However, its ecological risks are not well understood because of lack of monitoring data and ecotoxicological information. In the present study, occurrence of BKC was investigated in the waters near a pharmaceutical manufacturing complex of South Korea and its acute and chronic ecotoxicities were evaluated using Daphnia magna and Japanese medaka (Oryzias latipes). Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127084DOI Listing

Microplastics aggravate the adverse effects of BDE-47 on physiological and defense performance in mussels.

J Hazard Mater 2020 May 13;398:122909. Epub 2020 May 13.

International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China; Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, 201306, China. Electronic address:

The highly hydrophobic surfaces make microplastics a potential carrier of organic pollutants in the marine environment. In order to explore the toxic effects of polybrominated diphenyl ethers (BDE-47) combined with microplastics on marine organisms, we exposed the marine mussel Mytilus coruscus to micro-PS combined with BDE-47 for 21 days to determine the immune defense, oxidative stress and energy metabolism of the mussels. The results showed that the clearance rate (CR) of mussels exposed to single micro-PS, single BDE-47 or both was lower than control group. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.122909DOI Listing

Pharmaceuticals and personal care products in a Brazilian wetland of international importance: Occurrence and environmental risk assessment.

Sci Total Environ 2020 May 14;734:139374. Epub 2020 May 14.

Post-Graduate Program in Technological and Environmental Chemistry, Escola de Química e Alimentos, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Universidade Federal do Rio Grande, Av Itália, km 8, Rio Grande, RS 96201-900, Brazil. Electronic address:

Despite the fact that the occurrence of emerging contaminants in the environment has become frequent in recent decades, the seasonal dynamics of contaminants in different environmental compartments are little studied in protected areas influenced by effluent discharges. In this study, the seasonal and spatial occurrence of 33 pharmaceuticals and personal care products (PPCPs) was investigated in surface waters and sediments from Anil and Bacanga rivers (northeast of Brazil). The studied area is located within a Wetland of International Importance by Ramsar Convention (Amazon Estuary and its Mangroves). Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.139374DOI Listing

Preventing and controlling Cryptosporidium spp. in aquatic facilities: environmental health practitioners' experiences in Victoria, Australia.

Aust N Z J Public Health 2020 May 27. Epub 2020 May 27.

Department of Chemistry and Biotechnology, Swinburne University of Technology, Victoria.

Objective: To identify barriers and enablers to preventing and controlling Cryptosporidium spp. in aquatic facilities as perceived by environmental health practitioners (EHPs).

Methods: A qualitative, constructivist study with a purposive sample of seven EHPs from Victoria, Australia, was conducted. Read More

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http://dx.doi.org/10.1111/1753-6405.12984DOI Listing

Inter-Population Similarities and Differences in Predation Efficiency of a Mosquito Natural Enemy.

J Med Entomol 2020 May 27. Epub 2020 May 27.

Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, Northern Ireland.

Predation is a critical factor that mediates population stability, community structure, and ecosystem function. Predatory natural enemies can contribute to the regulation of disease vector groups such as mosquitoes, particularly where they naturally co-occur across landscapes. However, we must understand inter-population variation in predatory efficiency if we are to enhance vector control. Read More

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http://dx.doi.org/10.1093/jme/tjaa093DOI Listing

Contrasting stoichiometric dynamics in terrestrial and aquatic grazer-producer systems.

J Biol Dyn 2020 May 27:1-31. Epub 2020 May 27.

Department of Mathematical and Statistical Sciences, University of Alberta, Edmonton, Canada.

The turnover rate of producer biomass in aquatic ecosystems is generally faster than in terrestrial. That is, aquatic producer biomass grows, is consumed, and is replaced considerably faster than terrestrial. The WKL model describes the flow of phosphorus and carbon through a grazer-producer system, hence varying the model parameters allows for analysis of different ecosystems of this type. Read More

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http://dx.doi.org/10.1080/17513758.2020.1771442DOI Listing

Evolutionary links between intra- and extracellular acid-base regulation in fish and other aquatic animals.

J Exp Zool A Ecol Integr Physiol 2020 May 26. Epub 2020 May 26.

Department of Zoology, University of British Columbia, Vancouver, Canada.

The acid-base relevant molecules carbon dioxide (CO ), protons (H ), and bicarbonate (HCO ) are substrates and end products of some of the most essential physiological functions including aerobic and anaerobic respiration, ATP hydrolysis, photosynthesis, and calcification. The structure and function of many enzymes and other macromolecules are highly sensitive to changes in pH, and thus maintaining acid-base homeostasis in the face of metabolic and environmental disturbances is essential for proper cellular function. On the other hand, CO , H , and HCO have regulatory effects on various proteins and processes, both directly through allosteric modulation and indirectly through signal transduction pathways. Read More

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http://dx.doi.org/10.1002/jez.2367DOI Listing

Determination of biogenic amines in Chub Mackerel from different storage methods.

J Food Sci 2020 May 26. Epub 2020 May 26.

Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln, 7647, New Zealand.

The eight biogenic amines (BA), which are histamine (HIS), tryptamine, putrescine, 2-phenylethylamine, cadaverine, tyramine, spermidine, and spermine, were determined in Chub Mackerel under different storage conditions after being freshly caught. The storage time and temperature were varied and the guts either present or removed. This study describes a reverse-phase high-performance liquid chromatography (HPLC) with a fluorescence detector following precolumn derivation with dansyl chloride method for the determination of BA in in Chub Mackerel samples. Read More

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http://dx.doi.org/10.1111/1750-3841.15146DOI Listing

Cyanotoxin release from the benthic, mat-forming cyanobacterium Microseira (Lyngbya) wollei in the St. Lawrence River, Canada.

Environ Sci Pollut Res Int 2020 May 26. Epub 2020 May 26.

Environment and Climate Change Canada, 105 McGill, Montréal, Québec, H2Y 2E7, Canada.

Benthic cyanobacterial mats occurring in the St. Lawrence River fluvial lakes Saint-Louis and Saint-Pierre are dominated by Microseira (Lyngbya) wollei which produce several cyanotoxins including LWTX-1 that is characteristic of Microseira wollei. This cyanotoxin is not only present in the filaments forming benthic mats, but was also measured in the water overlying the mats. Read More

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http://dx.doi.org/10.1007/s11356-020-09290-2DOI Listing

Biosynthesis of the starch is improved by the supplement of nickel (Ni) in duckweed (Landoltia punctata).

J Plant Res 2020 May 27. Epub 2020 May 27.

College of Life Sciences, Sichuan University , Chengdu, 610064, China.

Duckweed is a kind of floating aquatic plant and increasing its starch production is favorable for bioenergy. In this study, we found that starch biosynthesis was greatly promoted by the supplement of nickel ion (Ni) through the comparison of other different ions. The starch content in duckweed was increased by nearly eightfold when duckweed was treated with 20 µM Ni. Read More

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http://dx.doi.org/10.1007/s10265-020-01204-0DOI Listing

Insights into Dietary Switch in Cetaceans: Evidence from Molecular Evolution of Proteinases and Lipases.

J Mol Evol 2020 May 26. Epub 2020 May 26.

Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, No. 1 Wenyuan Road, Nanjing, 210046, China.

Fossil evidence suggests that cetaceans evolved from artiodactylans. Thus, there was a major dietary change from herbivorous to carnivorous during their transition from a terrestrial to an aquatic environment. However, the molecular evolutionary mechanisms underlying this dietary switch have not been well investigated. Read More

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http://dx.doi.org/10.1007/s00239-020-09952-2DOI Listing

The Effects of Oral Polysaccharide Administration on Immune Responses, Antioxidant Activity and Resistance Against in the Common Carp, L.

Front Immunol 2020 8;11:904. Epub 2020 May 8.

College of Fisheries, Henan Normal University, Xinxiang, China.

The effects of the oral administration of polysaccharide (RGP-1) on the immunoregulatory properties, antioxidant activity, and resistance against in L. were investigated. The purified RGP-1 (250, 500, and 1,000 μg/mL) was co-cultured with the head kidney cells of the common carp. Read More

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http://dx.doi.org/10.3389/fimmu.2020.00904DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7225328PMC

Metabolic Insights Into Infochemicals Induced Colony Formation and Flocculation in Unraveled by Quantitative Proteomics.

Front Microbiol 2020 7;11:792. Epub 2020 May 7.

Department of Chemical and Biological Engineering, University of Sheffield, Sheffield, United Kingdom.

Microalgae can respond to natural cues from crustacean grazers, such as , by forming colonies and aggregations called flocs. Combining microalgal biology, physiological ecology, and quantitative proteomics, we identified how infochemicals from trigger physiological and cellular level changes in the microalga , underpinning colony formation and flocculation. We discovered that flocculation occurs at an energy-demanding 'alarm' phase, with an important role proposed in cysteine synthesis. Read More

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http://dx.doi.org/10.3389/fmicb.2020.00792DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7220994PMC

Impact of Salinity on the Gastrointestinal Bacterial Community of .

Front Microbiol 2020 8;11:683. Epub 2020 May 8.

Centre for Limnology, Estonian University of Life Sciences, Tartu, Estonia.

Differences in salinity are boundaries that act as barriers for the dispersal of most aquatic organisms. This creates distinctive biota in freshwater and brackish water (mesohaline) environments. To test how saline boundaries influence the diversity and composition of host-associated microbiota, we analyzed the microbiome within the digestive tract of , an organism able to cross the freshwater and mesohaline boundary. Read More

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http://dx.doi.org/10.3389/fmicb.2020.00683DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7225522PMC

Generic Emergence of Modularity in Spatial Networks.

Authors:
Luis J Gilarranz

Sci Rep 2020 May 26;10(1):8708. Epub 2020 May 26.

Department of Aquatic Ecology, Eawag (Swiss Federal Institute of Aquatic Science and Technology) Überlandstrasse 133, 8600, Dübendorf, ZH, Switzerland.

Landscape's spatial structure has vast implications for the dynamics and distribution of species populations and ecological communities. However, the characterization of the structure of spatial networks has not received nearly as much attention as networks of species interactions counterparts. Recent experiments show the dynamical implications of modularity to buffer perturbations, and theory shows that several other processes might be impacted if spatial networks were modular, from disease transmission to gene flow. Read More

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http://dx.doi.org/10.1038/s41598-020-65669-8DOI Listing

A novel cyanobacterial geosmin producer, revising GeoA distribution and dispersion patterns in Bacteria.

Sci Rep 2020 May 26;10(1):8679. Epub 2020 May 26.

Instituto Gulbenkian de Ciência, Rua da Quinta Grande n°6, 2780-156, Oeiras, Portugal.

Cyanobacteria are ubiquitous organisms with a relevant contribution to primary production in all range of habitats. Cyanobacteria are well known for their part in worldwide occurrence of aquatic blooms while producing a myriad of natural compounds, some with toxic potential, but others of high economical impact, as geosmin. We performed an environmental survey of cyanobacterial soil colonies to identify interesting metabolic pathways and adaptation strategies used by these microorganisms and isolated, sequenced and assembled the genome of a cyanobacterium that displayed a distinctive earthy/musty smell, typical of geosmin, confirmed by GC-MS analysis of the culture's volatile extract. Read More

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http://dx.doi.org/10.1038/s41598-020-64774-yDOI Listing

Genomic adaptations to aquatic and aerial life in mayflies and the origin of insect wings.

Nat Commun 2020 May 26;11(1):2631. Epub 2020 May 26.

GEM-DMC2 Unit, The CABD (CSIC-UPO-JA), Ctra. de Utrera km 1, 41013, Seville, Spain.

The evolution of winged insects revolutionized terrestrial ecosystems and led to the largest animal radiation on Earth. However, we still have an incomplete picture of the genomic changes that underlay this diversification. Mayflies, as one of the sister groups of all other winged insects, are key to understanding this radiation. Read More

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http://dx.doi.org/10.1038/s41467-020-16284-8DOI Listing

Hypoxia acclimation alters reactive oxygen species homeostasis and oxidative status in estuarine killifish ().

J Exp Biol 2020 May 26. Epub 2020 May 26.

Department of Biology, McMaster University, Hamilton, Ontario, Canada.

Hypoxia is common in aquatic environments, and exposure to hypoxia followed by reoxygenation is often believed to induce oxidative stress. However, there have been relatively few studies of reactive oxygen species (ROS) homeostasis and oxidative status in fish that experience natural hypoxia-reoxygenation cycles. We examined how exposure to acute hypoxia (2 kPa O) and subsequent reoxygenation (to 20 kPa O) affects redox status, oxidative damage, and antioxidant defenses in estuarine killifish (), and whether these effects were ameliorated or potentiated by prolonged (28 day) acclimation to either constant hypoxia or intermittent cycles of nocturnal hypoxia (12 h normoxia: 12 h hypoxia). Read More

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http://dx.doi.org/10.1242/jeb.222877DOI Listing

Contamination and health risks assessment in a dam in the southeast region of Brazil using ecotoxicological methods.

J Toxicol Environ Health A 2020 May 27:1-8. Epub 2020 May 27.

Institute of Biotechnology, Umuarama Campus, Federal University of Uberlândia , Minas Gerais, Brazil.

Concerned with water quality, specialists have resorted to ecotoxicology as a tool to assess suspected contamination, enabling creation of strategies to repair the observed damage. Organisms such as fish and micro crustaceans are widely used in acute tests due to several characteristics in common among them including (1) accessibility of multiple samples, and (2) enhanced sensitivity when exposed to pollutants. Thus, the objective of this investigation was to determine the degree of toxicity at different points of a dam in Coromandel, Minas Gerais, using and as bioindicator organisms. Read More

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http://dx.doi.org/10.1080/15287394.2020.1767250DOI Listing

Development of an In Situ Analyzer Based on Sequential Injection Analysis and Liquid Waveguide Capillary Flow Cell for the Determination of Dissolved Reactive Phosphorus in Natural Waters.

Sensors (Basel) 2020 May 24;20(10). Epub 2020 May 24.

State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.

This study presents an innovative technique for the in situ analysis of aquatic biochemical elements detected through wet chemical processes. A new compact in situ phosphate analyzer based on sequential injection analysis, liquid waveguide capillary flow cell and spectrophotometry was developed, and a safe and modular electronics-chemical separation mechanical structure was designed. The sequential injection system of this analyzer was optimized, and the major functions of this analyzer were studied and estimated. Read More

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http://dx.doi.org/10.3390/s20102967DOI Listing

Influence of Aquatic Therapy in Children and Youth with Cerebral Palsy: A Qualitative Case Study in a Special Education School.

Int J Environ Res Public Health 2020 May 23;17(10). Epub 2020 May 23.

Department of Physical Therapy, Occupational Therapy, Rehabilitation and Physical Medicine, Rey Juan Carlos University, Alcorcón, 28922 Madrid, Spain.

Cerebral palsy results in the progressive loss of motor functions, with a negative impact on daily activities and participation. Despite the well described benefits of aquatic therapy in children, little is known about the effects of the same in school settings. This study aimed to describe the experience of children and youth with cerebral palsy participating in an aquatic therapy program within a special education school considering their educational and therapeutic perspectives. Read More

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http://dx.doi.org/10.3390/ijerph17103690DOI Listing

Response of (Chlorophyceae) to Salt Stress Considering Nutrient Enrichment and Intracellular Proline Accumulation.

Int J Environ Res Public Health 2020 May 21;17(10). Epub 2020 May 21.

Human and Eco-Care Center, Konkuk University, Seoul 05029, Korea.

Aquatic organisms are exposed to a wide range of salinity, which could critically affect their survival and growth. However, their survival and growth response to salinity stress remain unclear. This study evaluates the growth response and intracellular proline accumulation of green algae, , isolated from brackish water, against dissolved salts stress with N and P enrichment. Read More

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http://dx.doi.org/10.3390/ijerph17103624DOI Listing

First Isolation and Characterization of SKNUCL01, Isolated from Diseased Pond loach () in Korea.

Pathogens 2020 May 21;9(5). Epub 2020 May 21.

Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08826, Korea.

Loaches are widely distributed throughout the natural environment and are consumed for medicinal purposes in East Asia. Usually, loaches are cultured in ponds where the water conditions can easily cause bacterial infections. Infections due to bacterial pathogens such as have been well described in cultured loaches; however, there is no report regarding infection. Read More

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http://dx.doi.org/10.3390/pathogens9050397DOI Listing

Insight into the Lifestyle of Amoeba during Bioreactor Growth Using Transcriptomics and Proteomics.

Microorganisms 2020 May 21;8(5). Epub 2020 May 21.

Aix-Marseille Univ., Institut de Recherche pour le Développement IRD 198, Assistance Publique-Hôpitaux de Marseille (AP-HM), Microbes, Evolution, Phylogeny and Infection (MEΦI), UM63, 13005 Marseille, France.

C2c maky is a thermophilic free-living amoeba strain that showed ability to eliminate , a pathogenic bacterium living in the aquatic environment. The amoeba industry has proposed the use of as a natural biocide to control proliferation in cooling towers. Here, transcriptomic and proteomic studies were carried out in order to expand knowledge on produced in a bioreactor. Read More

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http://dx.doi.org/10.3390/microorganisms8050771DOI Listing

Seasonal Shift in Physicochemical Factors Revealed the Ecological Variables that Modulate the Density of Species in Freshwater Resources.

Int J Environ Res Public Health 2020 May 21;17(10). Epub 2020 May 21.

SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice 5700, Eastern Cape, South Africa.

Certain environmental variables are responsible for the survival of microorganisms in aquatic environments. The influence of these environmental factors in each season (winter, autumn, spring and summer) of the year can be used to track changes in a microbial population in freshwater resources. In this study, we assessed the effect of seasonal shifts in environmental variables including temperature, pH, total dissolved solids (TDS), total suspended solids (TSS), biochemical oxygen demand (BOD) and turbidity (TBS) among others on the density of species in the Great Fish, Keiskamma and Tyhume rivers in the Eastern Cape Province, South Africa. Read More

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http://dx.doi.org/10.3390/ijerph17103606DOI Listing

Does Formation of Multicellular Colonies by Choanoflagellates Affect Their Susceptibility to Capture by Passive Protozoan Predators?

J Eukaryot Microbiol 2020 May 26. Epub 2020 May 26.

Department of Integrative Biology, University of California, Berkeley, California, 94720-3140, USA.

Microbial eukaryotes, critical links in aquatic food webs, are unicellular, but some, such as choanoflagellates, form multicellular colonies. Are there consequences to predator avoidance of being unicellular versus forming larger colonies? Choanoflagellates share a common ancestor with animals and are used as model organisms to study the evolution of multicellularity. Escape in size from protozoan predators is suggested as a selective factor favoring evolution of multicellularity. Read More

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http://dx.doi.org/10.1111/jeu.12808DOI Listing

Locomotory behaviour of the intertidal marble crab () supports the underwater spring loaded inverted pendulum as fundamental model for punting in animals.

Bioinspir Biomim 2020 May 26. Epub 2020 May 26.

The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa, Toscana, ITALY.

In aquatic pedestrial locomotion, the dynamics of terrestrial and aquatic environments are coupled. Here we study terrestrial running and aquatic punting locomotion of the marine-living crab. We detected both active and passive phases of running and punting through the observation of crab locomotory behavior in standardized settings and by 3D kinematic analysis of its dynamic gaits using high speed video cameras. Read More

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http://dx.doi.org/10.1088/1748-3190/ab968cDOI Listing

UV light and temperature induced fluridone degradation in water and sediment and potential transport into aquifer.

Environ Pollut 2020 May 17;265(Pt A):114750. Epub 2020 May 17.

Land Air and Water Resources Department, University of California-Davis, Davis, CA, 95616, USA.

Fluridone is widely used in ambient water bodies to control the spread of invasive aquatic plants. While the ability of fluridone to control aquatic weeds such as water hyacinth is well reported, an improved understanding of fluridone persistence in water and sediment is still needed to determine potential residues of fluridone in the water column and bed sediment of ambient water bodies. In this study, experiments were conducted over a three-month period to examine the degradation of fluridone in saturated sediment and water under various levels of UV-light (0-1000 μW/cm), and temperature (4-40 °C). Read More

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http://dx.doi.org/10.1016/j.envpol.2020.114750DOI Listing

Determination of dextromethorphan and dextrorphan solar photo-transformation products by LC/Q-TOF-MS: Laboratory scale experiments and real water samples analysis.

Environ Pollut 2020 May 10;265(Pt A):114722. Epub 2020 May 10.

Solar Energy Research Centre (CIESOL), Joint Centre University of Almería-CIEMAT, Ctra de Sacramento s/n. 04120, Almería, Spain; Department of Chemistry and Physics, University of Almería, Spain. Electronic address:

This work discusses the identification of the transformation products (TPs) generated during the photolytic degradation of dextromethorphan (DXM) and its metabolite dextrorphan (DXO), under simulated solar radiation in aqueous solutions (Milli-Q water and river water) in order to determinate its behavior into the aquatic environment. Tentative identification of the TPs was performed by liquid chromatography/quadrupole time-of-flight mass spectrometry (LC/QTOF-MS), following a suspect screening approach. The use of high resolution-mass spectrometry (HRMS) allowed the tentative identification of DXM and DXO photoproducts based on the structure proposed by an in silico software, the accurate mass measurement, the MS/MS fragmentation pattern and the molecular formula finding. Read More

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http://dx.doi.org/10.1016/j.envpol.2020.114722DOI Listing

Population-level variation in neonicotinoid tolerance in nymphs of the Heptageniidae.

Environ Pollut 2020 May 14;265(Pt B):114803. Epub 2020 May 14.

Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN, 47907, USA.

Anthropogenic activities can have significant ecological and evolutionary consequences on populations and communities. In the United States, neonicotinoid insecticides are widespread across the agricultural Midwest and frequently detected in stream systems. Their effect on Heptageniidae mayflies is a major concern because they are highly sensitive to neonicotinoids and have some of the lowest reported tolerance values of any organism. Read More

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http://dx.doi.org/10.1016/j.envpol.2020.114803DOI Listing

Dietary administration of probiotic Lactobacillus rhamnosus modulates the neurological toxicities of perfluorobutanesulfonate in zebrafish.

Environ Pollut 2020 May 17;265(Pt B):114832. Epub 2020 May 17.

State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China. Electronic address:

Perfluorobutanesulfonate (PFBS), an aquatic pollutant of emerging concern, is found to disturb the neural signaling along gut-brain axis, whereas probiotic additives have been applied to improve neuroendocrine function of teleosts. Both PFBS and probiotics can commonly target nervous system. However, whether and how probiotic bacteria can modulate the neurotoxicities of PFBS remain not explored. Read More

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http://dx.doi.org/10.1016/j.envpol.2020.114832DOI Listing

Titanium nitride nanoparticle embedded membrane for photothermal membrane distillation.

Chemosphere 2020 May 11;256:127053. Epub 2020 May 11.

State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing, 100085, China; National Engineering Laboratory for Industrial Wastewater Treatment, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing, 100085, China. Electronic address:

To meet the increasing worldwide need for freshwater, it has become critical to exploit non-potable saline water. Solar membrane distillation (MD) is a promising desalination technique, which does not require conventional energy and can reduce the cost of water production. We developed a cost-effective and high-efficiency photothermal membrane that employs TiN nanoparticles as an absorber of sunlight and energy converter. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127053DOI Listing

Effects of environmental factors on the growth and microcystin production of Microcystis aeruginosa under TiO nanoparticles stress.

Sci Total Environ 2020 May 15;734:139443. Epub 2020 May 15.

State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210046, China.

Due to the growing use and release of nanomaterials, their toxic impacts on aquatic ecosystems have drawn widespread attention in recent years. In this study, we exposed Microcystis aeruginosa to 5 mg/L titanium dioxide nanoparticles (nTiO) under different culture conditions (pH 6, 7, 8, 9; 20 °C, 25 °C, 30 °C). The results showed that algae had the worst growth status with lowest biomass, lowest photosynthetic activity and highest reactive oxygen species (ROS) generation under 5 mg/L nTiO at pH 6 and 20 °C. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.139443DOI Listing

Effects of low flow and co-occurring stressors on structural and functional characteristics of the benthic biofilm in small streams.

Sci Total Environ 2020 May 11;733:139331. Epub 2020 May 11.

Department of Biology, Aarhus University, Denmark.

Low flow and co-occurring stress is a more and more frequent phenomenon these years in small agricultural streams as a consequence of climate change. In the present study we explored short and longer term structural responses of the stream benthic algae community and biofilm metabolism to multiple stress in small streams applying a semi-experimental approach. We hypothesized that i) a reduction in flow in combination with secondary stress (nutrients and sediments) have immediate effects on the benthic algae community in terms of biomass (chlorophyll a, biovolume), taxonomic and trait (lifeform and size distribution) compositions as well as on metabolism (GPP and CR), and ii) that changes in the benthic algae community persist due to altered environmental settings but that functional redundancy among benthic algae species provides a high level of resilience in metabolism (GPP and CR). Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.139331DOI Listing

Soy glycinin-soyasaponin mixtures at oil-water interface: Interfacial behavior and O/W emulsion stability.

Food Chem 2020 May 18;327:127062. Epub 2020 May 18.

College of Food Science and Technology, Bohai University, Food Safety Key Lab of Liaoning Province, National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, Jinzhou, Liaoning 121013, China. Electronic address:

Soy glycinin (11S) was mixed with soyasaponin (Ssa) to elucidate the mechanism(s) involved in the stabilization of emulsions by mixed systems based on dynamic interfacial tension and dilatational rheology at the oil-water interface. The short/long-term properties of oil-in-water emulsions stabilized by 11S-Ssa mixtures included droplet-size distribution, droplet ζ-potential, microstructure, and Turbiscan stability index. The combination of Ssa (0. Read More

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http://dx.doi.org/10.1016/j.foodchem.2020.127062DOI Listing

Effects of triphenyl phosphate on ciliate protozoa Tetrahymena thermophila following acute exposure and sub-chronic exposure.

Ecotoxicol Environ Saf 2020 May 23;200:110757. Epub 2020 May 23.

College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China. Electronic address:

Triphenyl phosphate (TPHP) is one of the most widely used organophosphate flame retardants (OPFRs) and is frequently detected in a variety of environmental media. Previous studies reported that TPHP had toxic effects on vertebrates, but little toxic information was available in lower trophic aquatic organisms which were more sensitive to the exposure of many toxic substances. In this study, protozoa Tetrahymena thermophila (T. Read More

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http://dx.doi.org/10.1016/j.ecoenv.2020.110757DOI Listing

Seaweed-coral competition in the field: effects on coral growth, photosynthesis and microbiomes require direct contact.

Proc Biol Sci 2020 May 27;287(1927):20200366. Epub 2020 May 27.

School of Biological Sciences, Aquatic Chemical Ecology Center, and Center for Microbial Dynamics and Infection, Georgia Institute of Technology, Atlanta, GA 30332-0230, USA.

A number of tropical reefs have transitioned from coral to macroalgal dominance, but the role of macroalgal competition in coral decline is debated. There is a need to understand the relative roles of direct coral-algal effects versus indirect, microbially mediated effects shaping these interactions, as well as the relevant scales at which interactions operate under natural field, as opposed to laboratory, conditions. We conducted a manipulative field experiment investigating how direct contact versus close proximity (approx. Read More

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http://dx.doi.org/10.1098/rspb.2020.0366DOI Listing

Universal metabolic constraints shape the evolutionary ecology of diving in animals.

Proc Biol Sci 2020 May 27;287(1927):20200488. Epub 2020 May 27.

Marine Biology and Ecology Research Centre, School of Biological and Marine Sciences, University of Plymouth, Drake Circus, Plymouth PL4 8AA, UK.

Diving as a lifestyle has evolved on multiple occasions when air-breathing terrestrial animals invaded the aquatic realm, and diving performance shapes the ecology and behaviour of all air-breathing aquatic taxa, from small insects to great whales. Using the largest dataset yet assembled, we show that maximum dive duration increases predictably with body mass in both ectotherms and endotherms. Compared to endotherms, ectotherms can remain submerged for longer, but the mass scaling relationship for dive duration is much steeper in endotherms than in ectotherms. Read More

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http://dx.doi.org/10.1098/rspb.2020.0488DOI Listing

Iron-biomineralizing organelle in magnetotactic bacteria: function, synthesis and preservation in ancient rock samples.

Environ Microbiol 2020 May 25. Epub 2020 May 25.

Aix-Marseille University, CNRS, CEA, UMR7265 Institute of Biosciences and Biotechnologies of Aix-Marseille, CEA Cadarache, F-13108 Saint-Paul-lez-Durance, France.

Magnetotactic bacteria (MTB) are ubiquitous aquatic microorganisms that incorporate iron from their environment to synthesize intracellular nanoparticles of magnetite (Fe O ) or greigite (Fe S ) in a genetically controlled manner. Magnetite and greigite magnetic phases that allow MTB to swim towards redox transitions zones where they thrive. MTB may represent some of the oldest microorganisms capable of synthesizing minerals on Earth, and have been proposed to significantly impact the iron biogeochemical cycle by immobilizing soluble iron into crystals that subsequently fossilize in sedimentary rocks. Read More

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http://dx.doi.org/10.1111/1462-2920.15098DOI Listing

Application of Biomarker Tools using Bivalve Models Towards the Development of Adverse Outcome Pathways (AOPs) for Contaminants of Emerging Concern.

Environ Toxicol Chem 2020 May 25. Epub 2020 May 25.

US Environmental Protection Agency, ORD-CEMM, Atlantic Coastal Environmental Sciences Division, 27 Tarzwell Drive, Narragansett, RI, 02882, USA.

As contaminant exposures in aquatic ecosystems continue to increase, the need for streamlining research efforts in environmental toxicology using predictive frameworks also grows. One such framework is the Adverse Outcome Pathway (AOP). An AOP framework organizes and utilizes toxicological information to connect measurable molecular endpoints to an adverse outcome of regulatory relevance via a series of events at different levels of biological organization. Read More

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http://dx.doi.org/10.1002/etc.4757DOI Listing

Occurrence of pharmaceutical and personal care products in Cau River, Vietnam.

Environ Sci Pollut Res Int 2020 May 26. Epub 2020 May 26.

School of Environmental Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet Road, Hanoi, Vietnam.

This study evaluated the occurrence of PPCPs in Cau River (Vietnam). Surface water and sediment samples were collected to determine PPCP concentrations. The analysis results showed the presence of 36 out of 56 investigated PPCPs in samples. Read More

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http://dx.doi.org/10.1007/s11356-020-09195-0DOI Listing

Coupling of natural organic matter-metal binding and laccase-catalyzed oxidation of tetrabromobisphenol A.

Environ Sci Pollut Res Int 2020 May 25. Epub 2020 May 25.

College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China.

Laccases are a group of copper-containing oxidase enzymes found in aquatic and terrestrial environment. They can catalyze one-electron oxidation of phenolic compounds to radical intermediates using molecular oxygen as the electron accepter. The radical intermediates can subsequently couple to each other to form dimers. Read More

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http://dx.doi.org/10.1007/s11356-020-09352-5DOI Listing

Naegleria fowleri: differential genetic expression following treatment with Hesperidin conjugated with silver nanoparticles using RNA-Seq.

Parasitol Res 2020 May 26. Epub 2020 May 26.

Department of Biology, Chemistry and Environmental Sciences, College of Arts and Sciences, American University of Sharjah, University City, Sharjah, United Arab Emirates.

Naegleria fowleri causes a deadly infection known as primary amoebic meningoencephalitis (PAM). To our knowledge, there are very few transcriptome studies conducted on these brain-eating amoebae, despite rise in the number of cases. Although the Naegleria genome has been sequenced, currently, it is not well annotated. Read More

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http://dx.doi.org/10.1007/s00436-020-06711-6DOI Listing

Isolation and Complete Genome Sequence of a Novel Cyanophage S-B68.

Curr Microbiol 2020 May 25. Epub 2020 May 25.

College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China.

Cyanophages, which play a significant role in food web and global biochemical cycle, are one of the main causes of microbial death in aquatic environment. A novel cyanophage S-B68 was isolated from the surface water of the Bohai Sea, northern China. It can infect marine Synechococcus sp. Read More

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http://dx.doi.org/10.1007/s00284-020-02045-9DOI Listing

Digital multiplex ligation assay for highly multiplexed screening of β-lactamase-encoding genes in bacterial isolates.

Commun Biol 2020 May 25;3(1):264. Epub 2020 May 25.

Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH-8600, Dübendorf, Switzerland.

Increasing incidence of antibiotic resistance in clinical and environmental settings calls for increased scalability in their surveillance. Current screening technologies are limited by the number of samples and genes that can easily be screened. We demonstrate here digital multiplex ligation assay (dMLA) as a low-cost targeted genomic detection workflow capable of highly-parallel screening of bacterial isolates for multiple target gene regions simultaneously. Read More

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http://dx.doi.org/10.1038/s42003-020-0980-7DOI Listing

Species better track climate warming in the oceans than on land.

Nat Ecol Evol 2020 May 25. Epub 2020 May 25.

Laboratoire Evolution et Diversité Biologique, UMR5174, Université Toulouse III - Paul Sabatier, CNRS, IRD and UPS, Toulouse, France.

There is mounting evidence of species redistribution as climate warms. Yet, our knowledge of the coupling between species range shifts and isotherm shifts remains limited. Here, we introduce BioShifts-a global geo-database of 30,534 range shifts. Read More

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http://dx.doi.org/10.1038/s41559-020-1198-2DOI Listing

Effects of carbon nanotubes on the toxicities of copper, cadmium and zinc toward the freshwater microalgae Scenedesmus obliquus.

Aquat Toxicol 2020 May 15;224:105504. Epub 2020 May 15.

Department of Crop and Soil Sciences, University of Georgia, Griffin, GA 30223, United States.

Due to their unique structure and properties, carbon nanotubes (CNTs) released into the aquatic environment can potentially influence the behavior of other coexisting pollutants, thereby altering their toxicity to aquatic organisms. In this study, the toxicities of multi-walled CNTs and three heavy metals, copper (Cu), cadmium (Cd) and zinc (Zn) were determined individually. Following this, CNTs with low concentrations (1 and 5 mg/L) were co-exposed with Cu, Cd or Zn to the microalgae Scenedesmus obliquus, to investigate the effects and underlying mechanisms of CNTs on metal toxicity. Read More

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http://dx.doi.org/10.1016/j.aquatox.2020.105504DOI Listing

Environmental status of (micro)plastics contamination in Portugal.

Ecotoxicol Environ Saf 2020 May 22;200:110753. Epub 2020 May 22.

Centre for Environmental and Marine Studies (CESAM) & Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal. Electronic address:

Plastics and microplastics are ubiquitous contaminants in aquatic ecosystems. This critical review is the first attempt at analyzing sources, concentration, impacts and solutions of (micro)plastic litter in Portugal based on all currently available literature. We found that, besides sea-based sources (e. Read More

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http://dx.doi.org/10.1016/j.ecoenv.2020.110753DOI Listing

Ecotoxicity of chlorpyrifos to aquatic organisms: A review.

Ecotoxicol Environ Saf 2020 May 22;200:110731. Epub 2020 May 22.

Ocean College of Hebei Agricultural University, Qinhuangdao, Hebei Province, PR China. Electronic address:

Pesticides play an important role in promoting agricultural development, while their unreasonable use has led to environmental problems. Chlorpyrifos (CPF), a typical organophosphate pesticide, is used globally as an insecticide in agriculture. The extensive application of CPF has resulted in water contamination, and CPF has been detected in rivers, lakes, seawater, and even in rain. Read More

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http://dx.doi.org/10.1016/j.ecoenv.2020.110731DOI Listing