34,459 results match your criteria species freshwater


Intracellular Biotransformation of Cu(II)/Cu(I) Explained High Cu Toxicity to Phytoplankton .

Environ Sci Technol 2021 Oct 14. Epub 2021 Oct 14.

School of Energy and Environment and Hong Kong Branch of the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China.

The toxicity of Cu is related to its redox species, but the differential toxicity of Cu(II) and Cu(I) remains unknown. In the present study, we developed a novel protocol to simultaneously detect the biologically produced extracellular Cu(I) and internalized Cu(II) in a freshwater phytoplankton . The intracellular Cu(I) was further imaged using a fluorometric probe. Read More

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October 2021

Genome-wide analysis reveals demographic and life-history patterns associated with habitat modification in landlocked, deep-spawning sockeye salmon ().

Ecol Evol 2021 Oct 23;11(19):13186-13205. Epub 2021 Aug 23.

Department of Biology University of British Columbia Kelowna BC Canada.

Human-mediated habitat fragmentation in freshwater ecosystems can negatively impact genetic diversity, demography, and life history of native biota, while disrupting the behavior of species that are dependent on spatial connectivity to complete their life cycles. In the Alouette River system (British Columbia, Canada), dam construction in 1928 impacted passage of anadromous sockeye salmon (), with the last records of migrants occurring in the 1930s. Since that time, persisted as a resident population in Alouette Reservoir until experimental water releases beginning in 2005 created conditions for migration; two years later, returning migrants were observed for the first time in ~70 years, raising important basic and applied questions regarding life-history variation and population structure in this system. Read More

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October 2021

Full-Length Transcriptome: A Reliable Alternative for Single-Cell RNA-Seq Analysis in the Spleen of Teleost Without Reference Genome.

Front Immunol 2021 27;12:737332. Epub 2021 Sep 27.

Fisheries College, Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Jimei University, Xiamen, China.

Fish is considered as a supreme model for clarifying the evolution and regulatory mechanism of vertebrate immunity. However, the knowledge of distinct immune cell populations in fish is still limited, and further development of techniques advancing the identification of fish immune cell populations and their functions are required. Single cell RNA-seq (scRNA-seq) has provided a new approach for effective in-depth identification and characterization of cell subpopulations. Read More

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September 2021

First Report of Causing Calyx and Receptacle Blight on Strawberry in China.

Plant Dis 2021 Oct 13. Epub 2021 Oct 13.

Shenyang Agricultural University, 98428, College of Plant protection, Shenyang, China;

Strawberry () is widely cultivated in Liaoning Province, the most important strawberry production area in China. In November 2020, extensive brown spotting on the calyces and receptacles and dark brown necrotic lesions on the leaves of 'YanLi' strawberry plants were observed in the greenhouse, College of Horticulture, in Shenyang Agriculture University of Liaoning Province, China. The incidence ranged from 15% to 20% in the greenhouse. Read More

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October 2021

First Report of on in southern Arizona.

Plant Dis 2021 Oct 13. Epub 2021 Oct 13.

Colorado State University, 3447, Department of Bioagricultural Sciences and Pest Management, 1177 Campus Delivery, Fort Collins, Colorado, United States, 80523;

In 2019, a decline of Quercus emoryi (Emory oak) was observed on the Coronado National Forest located in southeastern Arizona. Symptoms associated with oak mortality included crown die-back and large cankers revealing charcoal-like stromal growth. Trunks and root collars showed girdling and many affected trees also displayed evidence of gold-spotted oak borer activity. Read More

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October 2021

How to build single-celled cnidarians with worm-like motility: Lessons from Myxozoa.

J Anat 2021 Oct 13. Epub 2021 Oct 13.

Department of Life Sciences, Natural History Museum, London, UK.

Metazoans with worm-like morphologies across diverse and disparate groups typically demonstrate motility generated by hydrostatic skeletons involving tissue layers (muscles and epithelia). Here we present representative morphological, behavioural and molecular data for parasitic cnidarians (myxozoans) that demonstrate unprecedented variation in form and function, developing as cellular hydrostats. Motile elongate plasmodia characterise a remarkable radiation of species in the genus Ceratomyxa. Read More

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October 2021

Biochemical and morphological characterization of freshwater microalga Tetradesmus obliquus (Chlorophyta: Chlorophyceae).

Protoplasma 2021 Oct 13. Epub 2021 Oct 13.

Department of Food Technology, Universidade Federal de Viçosa, Viçosa, Brazil.

Tetradesmus is a microalgal genus with biotechnological potential due to its rapid production of biomass, which is plenty in proteins, carbohydrates, lipids, and bioactives. However, its morphology and physiology need to be determined to guide better research to optimize the species cultivation and biocompounds processing. Thus, this study describes the biochemistry and morphology of the strain Tetradesmus obliquus BR003, isolated from a sample of freshwater reservoirs in a Brazilian municipality. Read More

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October 2021

Putative intranuclear coccidium in Mauremys leprosa (Schweigger) from Morocco.

Folia Parasitol (Praha) 2021 Aug 17;68. Epub 2021 Aug 17.

Laboratory of Water, Biodiversity and Climate Change, Faculty of Sciences, Semlalia, Cadi Ayyad University, Marrakech, Morocco.

Although intranuclear coccidiosis was first identified in chelonians less than 30 years ago, it is now considered an important emerging disease. Symptoms include anorexia, weakness and weight loss, potentially leading to death of the infected animal. The use of molecular tools has led to improved diagnosis and has also led to an increase in known host species. Read More

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Prediction of Geosmin at Different Depths of Lake Using Machine Learning Techniques.

Int J Environ Res Public Health 2021 Sep 30;18(19). Epub 2021 Sep 30.

Department of Life Science, Hanyang University, Seoul 04763, Korea.

Geosmin is a major concern in the management of water sources worldwide. Thus, we predicted concentration categories of geosmin at three different depths of lakes (i.e. Read More

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September 2021

Differences of Gut Microbiota in the Freshwater Blackworm (: Oligochaeta) in Two Different Habitat Conditions.

Int J Environ Res Public Health 2021 Sep 29;18(19). Epub 2021 Sep 29.

Department of Biology, Kyung Hee University, Seoul 02447, Korea.

The distribution of organisms is governed by their habitat condition. We analyzed bacterial communities in the gut of the blackworm by pyrosequencing of the extracted intestinal metagenomic DNA. Blackworms were collected from two sampling sites with differences in irradiance and riparian vegetation, where site GP7 was covered by riparian vegetation and site GP8 was exposed to sunlight. Read More

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September 2021

Mitochondrial Genomes, Phylogenetic Associations, and SNP Recovery for the Key Invasive Ponto-Caspian Amphipods in Europe.

Int J Mol Sci 2021 Sep 24;22(19). Epub 2021 Sep 24.

Department of Genetics and Marine Biotechnology, Polish Academy of Sciences, Institute of Oceanology, Powstańców Warszawy 55, 81-712 Sopot, Poland.

The Ponto-Caspian region is the main donor of invasive amphipods to freshwater ecosystems, with at least 13 species successfully established in European inland waters. spp. and are among the most successful, due to their strong invasive impact on local biota. Read More

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September 2021

Draft genome of Semisulcospira libertina, a species of freshwater snail.

Genomics Inform 2021 Sep 30;19(3):e32. Epub 2021 Sep 30.

Department of Orthopaedic Surgery, Gyeongsang National University Hospital, Jinju 52727, Korea.

Semisulcospira libertina, a species of freshwater snail, is widespread in East Asia. It is important as a food source. Additionally, it is a vector of clonorchiasis, paragonimiasis, metagonimiasis, and other parasites. Read More

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September 2021

Let it rip: The mechanics of self-bisection in asexual planarians determines their population reproductive strategies.

Phys Biol 2021 Oct 12. Epub 2021 Oct 12.

Biology Department, Swarthmore College, 500 College Ave, Swarthmore, Pennsylvania, 19081-1306, UNITED STATES.

Asexual freshwater planarians reproduce by transverse bisection (binary fission) into two pieces. This process produces a head and a tail, which fully regenerate within 1-2 weeks. How planarians split into two offspring - using only their musculature and substrate traction - is a challenging biomechanics problem. Read More

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October 2021

Toxicity of α-AgWO microcrystals to freshwater microalga Raphidocelis subcapitata at cellular and population levels.

Chemosphere 2021 Oct 9:132536. Epub 2021 Oct 9.

Department of Hydrobiology, Federal University of São Carlos (UFSCar), Rodovia Washington Luís, Km 235, 13565-905, São Carlos, SP, Brazil.

Silver-based materials have microbicidal action, photocatalytic activity and electronic properties. The increase in manufacturing and consumption of these compounds, given their wide functionality and application, is a source of contamination to freshwater ecosystems and causes toxicity to aquatic biota. Therefore, for the first time, we evaluated the toxicity of the silver tungstate (α-AgWO), in different morphologies (cube and rod), for the microalga Raphidocelis subcapitata. Read More

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October 2021

Invertebrate biodiversity and conservation.

Curr Biol 2021 Oct;31(19):R1214-R1218

German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, 04103 Leipzig, Germany; Institute of Biology, Leipzig University, Puschstrasse 4, 04103 Leipzig, Germany. Electronic address:

Biodiversity is changing at alarming rates as a result of human activities; yet biodiversity is the basis for ecosystem services upon which humans depend. Most of what we know about past, current, and projected biodiversity trends, as well as the ecosystem consequences of biodiversity change, is based on charismatic species, mostly plants and vertebrates. But 31 out of 32 animal phyla are invertebrates, representing roughly 75% of all described species on Earth. Read More

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October 2021

Long-Term Toxicity of Gadolinium to the Freshwater Crustacean Daphnia magna.

Bull Environ Contam Toxicol 2021 Oct 12. Epub 2021 Oct 12.

Laboratory of Environmental Toxicology, National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618, Tallinn, Estonia.

The lanthanides are considered emerging contaminants but information on their long-term toxicity to aquatic species under environmentally relevant conditions is scarce. We aimed to fill this gap by evaluating the long-term adverse effects of gadolinium on the freshwater model-crustacean Daphnia magna. The exposure of D. Read More

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October 2021

Hepatic nodular alterations in wild fish from a hyper-eutrophic freshwater system with cyanobacterial blooms: a species and seasonal comparison.

Environ Sci Pollut Res Int 2021 Oct 11. Epub 2021 Oct 11.

Department of Zoology, University of Venda, Thohoyandou, 0950, South Africa.

This paper reports on the seasonal and species comparison of hepatic nodular alterations in two indicator fish species from the hyper-eutrophic Roodeplaat Dam in South Africa. This freshwater system is characterized by seasonal cyanobacterial algal blooms which release bio-toxins, including hepato-toxins, which can have negative effects on the health of the resident fish population. A total of 115 Clarias gariepinus (Burchell) and 98 Oreochromis mossambicus (Peters) were collected seasonally across six different surveys over a period of 3 years. Read More

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October 2021

Impact assessment of a large river on the sediments and fish from its continental shelf: using Solea solea as sentinel in the Ebro river mouth (NW Mediterranean, Spain).

Environ Sci Pollut Res Int 2021 Oct 11. Epub 2021 Oct 11.

Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Universitat Autònoma de Barcelona, 08193, Barcelona, Spain.

Many studies have been carried out along mighty rivers with heavily industrialized watersheds to evaluate pollutants and their effects on freshwater organisms. However, their impact on marine organisms is virtually unknown. In order to cover this gap, Solea solea, one of the most important commercial fish species, together with sediments, were sampled during 2013-2015 offshore from the Ebro Delta river mouth. Read More

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October 2021

Evaluating the effect of microalga Haematococcus pluvialis bioaugmentation on aerobic membrane bioreactor in terms of performance, membrane fouling and microbial community structure.

Sci Total Environ 2021 Sep 14;807(Pt 1):149908. Epub 2021 Sep 14.

Department of Nutrition and Dietetics, Nişantaşı University, Maslak, 34469 Istanbul, Turkey.

In this study, considering the enhancement potential of microalgae and MBRs for wastewater treatment, the microalgae Haematococcus pluvialis, which is a freshwater species of Chlorophyta with a high capacity to synthesize astaxanthin, was bioaugmented into an aerobic MBR to investigate its potential on treatment of antibiotics in wastewater, reducing membrane biofouling, and impact on the microbial community structure. For this purpose, two control MBRs, with and without antibiotics, alongside an MBR bioaugmented with H. pluvialis, were set under mesophilic conditions, using inoculum from a local wastewater treatment facility and synthetic wastewater. Read More

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September 2021

How does Three Gorges Dam regulate heavy metal footprints in the largest freshwater lake of China.

Environ Pollut 2021 Oct 8;292(Pt A):118313. Epub 2021 Oct 8.

Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China.

Herein, a two-dimensional (2-D) vertically-averaged hydrodynamic model was applied to study the heavy metal particle footprints pre- and post-Three Gorges Dam (TGD) in Poyang Lake. Two defined indexes-Reserve Impact Index (σ) and Species Impact Index (η) were applied to assess the potential impact of the copper footprint on nature reserves and sensitive species quantitatively. The results demonstrated that the movement speed, distribution, and trajectory of copper particle footprints differed enormously pre- and post-TGD. Read More

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October 2021

Effects of river-lake disconnection and eutrophication on freshwater mollusc assemblages in floodplain lakes: Loss of congeneric species leads to changes in both assemblage composition and taxonomic relatedness.

Environ Pollut 2021 Oct 8;292(Pt A):118330. Epub 2021 Oct 8.

College of Life Sciences, Zaozhuang University, Zaozhuang, 277160, China.

River floodplain ecosystems host one of the highest freshwater molluscan biodiversity on Earth. However, multiple human disturbances, such as loss of hydrological connectivity and deterioration of water quality, are seriously threatening most floodplain lakes throughout the world. Given the high imperilment rate of freshwater molluscs but the scarcity of studies examining the anthropogenic effects on this fauna, we test the response of mollusc assemblages to river-lake disconnection and eutrophication in 30 lakes in the Yangtze River floodplain, China. Read More

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October 2021

Unparalleled disjunction or unexpected relationships? Molecular phylogeny and biogeography of Melanopsidae (Caenogastropoda: Cerithioidea), with the description of a new family and a new genus from the ancient continent Zealandia.

Cladistics 2019 Aug 9;35(4):401-425. Epub 2018 Dec 9.

Department of Animal Diversity, Center of Natural History (CeNak), Zoological Museum, Universität Hamburg, Martin-Luther-King-Platz 3, D-20146, Hamburg, Germany.

Melanopsidae are an important component of the freshwater fauna of the subtropical to temperate regions of the Western Palaearctic and also are reported from Zealandia, representing an unparalleled disjunction among a group of freshwater animals. We sequenced markers for species of all constituent genera covering the entire range of the group. Our phylogenetic analyses indicate that Melanopsidae are only monophyletic when excluding Holandriana from the Balkans, which was found to be more closely related to Pleuroceridae (eastern North America) and Semisuclospiridae (western North America and eastern Asia) than to the remaining melanopsids. Read More

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Dynamic Subspecies Population Structure of Vibrio cholerae in Dhaka, Bangladesh.

Microb Ecol 2021 Oct 11. Epub 2021 Oct 11.

Department of Biological Sciences, University of Alberta, Edmonton, AB, T6G 2E9, Canada.

Cholera has been endemic to the Ganges Delta for centuries. Although the causative agent, Vibrio cholerae, is autochthonous to coastal and brackish water, cholera occurs continually in Dhaka, the inland capital city of Bangladesh which is surrounded by fresh water. Despite the persistence of this problem, little is known about the environmental abundance and distribution of lineages of V. Read More

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October 2021

Description of a New Genus with Two New Species of Freshwater Crab (Decapoda: Brachyura: Gecarcinucidae) from the Southwestern Ghats, India.

Zool Stud 2021 6;60:e14. Epub 2021 Apr 6.

Lee Kong Chian Natural History Museum, Faculty of Science, National University of Singapore, 2 Conservatory Drive, Singapore 117377, Republic of Singapore. E-mail: (Ng).

A new genus of freshwater crab, gen. nov., and two species, sp. Read More

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Biosynthesized silver nanoparticles induce phytotoxicity in L.

Physiol Mol Biol Plants 2021 Sep 21;27(9):2115-2126. Epub 2021 Sep 21.

Department of Botany, The University of Azad Jammu And Kashmir (UAJK), Muzaffarabad, 13100 Pakistan.

With the recent developments in the field of nanotechnology, the biosynthesis of nanoparticles has increased tremendously. Silver nanoparticles (SNPs) are among the most synthesized nanoparticles and this extensive synthesis can elevate the amounts of SNPs in the environment, which, consequently, pose a serious threat to the ecosystem and can bring unwanted environmental effects. As plants are an important part of ecosystem, investigation of toxic effects of SNPs on plants is particularly interesting. Read More

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September 2021

A long-term atmospheric baseline for intercontinental exchange of airborne pathogens.

Environ Int 2021 Oct 6;158:106916. Epub 2021 Oct 6.

Integrative Freshwater Ecology Group & LTER-AT Research Group, Centre of Advanced Studies of Blanes-Spanish Council for Research CEAB-CSIC, Blanes E-17300, Spain. Electronic address:

The atmosphere is a potential pathway for global-scale and long-range dispersal of viable microorganisms, promoting biological interconnections among the total environment. We aimed to provide relevant baseline information for long-range long-term intercontinental exchange of potentially infectious airborne microorganisms of major interest in environmental and health-related disciplines. We used an interannual survey (7-y) with wet depositions fortnightly collected above the boundary layer (free troposphere) at a remote high-elevation LTER (Long-Term-Ecological-Research) site, analyzed by 16S and 18S rRNA genes, and compared to a database of 475 well-known pathogens. Read More

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October 2021

Optimizing invasive species management using mathematical programming to support stewardship of water and carbon-based ecosystem services.

J Environ Manage 2021 Oct 6;301:113803. Epub 2021 Oct 6.

Center for Global Discovery and Conservation Science, Arizona State University, Hilo, HI, USA.

Invasive species alter hydrologic processes at watershed scales, with impacts to biodiversity and the supporting ecosystem services. This effect is aggravated by climate change. Here, we integrated modelled hydrologic data, remote sensing products, climate data, and linear mixed integer optimization (MIP) to identify stewardship actions across space and time that can reduce the impact of invasive species. Read More

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October 2021

Transient exposure to sublethal concentrations of a pesticide mixture (chlorpyrifos-difenoconazole) caused different responses in fish species from different trophic levels of the same community.

Comp Biochem Physiol C Toxicol Pharmacol 2021 Oct 7;251:109208. Epub 2021 Oct 7.

Instituto Regional de Estudios en Sustancias Tóxicas, Central American Institute for Studies on Toxic Substances (IRET), Costa Rica. Electronic address:

The assessment of early effects caused in biota by sublethal exposure to pesticide mixtures should enhance the realism in the ecological risk assessment for agricultural landscapes. This study aimed to evaluate sub-individual responses in fish, which can be linked with outcomes at higher levels of biological organization and affect their trophic relationships. A multilevel biomarker approach was applied to assess the effects of a 48 h exposure of two freshwater mesoamerican fish species (Parachromis dovii and Poecilia gillii) to a mixture of sublethal concentrations of chlorpyrifos (5 μg/L) and difenoconazole (325 μg/L). Read More

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October 2021

Unravelling unknown cyanobacteria diversity linked with HCN production.

Mol Phylogenet Evol 2021 Oct 7;166:107322. Epub 2021 Oct 7.

Department of Botany, School of Biology, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece. Electronic address:

Cyanobacteria are ecologically versatile microorganisms, occupying diverse habitats, from terrestrial caves to coastal shores and from brackish lakes to thermal springs. Cyanobacteria have also been linked with hydrogen cyanide (HCN), mainly for their ability to catabolize HCN by the nitrogenase enzyme. In this context, we sampled disparate environments, spanning from Canary Islands and Iceland to Estonia and Cyprus. Read More

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October 2021

A phylogenomic perspective on the evolutionary history of the stonefly genus Suwallia (Plecoptera: Chloroperlidae) revealed by ultraconserved genomic elements.

Mol Phylogenet Evol 2021 Oct 6:107320. Epub 2021 Oct 6.

Department of Natural and Environmental Sciences, Western Colorado University, Gunnison, CO, USA. Electronic address:

Evolutionary biologists have long sought to disentangle phylogenetic relationships among taxa spanning the tree of life, an increasingly important task as anthropogenic influences accelerate population declines and species extinctions, particularly in insects. Phylogenetic analyses are commonly used to identify unique evolutionary lineages, to clarify taxonomic designations of the focal taxa, and to inform conservation decisions. Advances in DNA sequencing techniques have increasingly facilitated the ability of researchers to apply genomic methods to phylogenetic analyses, even for non-model organisms. Read More

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October 2021