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https://www.readbyqxmd.com/read/28528484/current-contamination-status-of-perfluoroalkyl-substances-in-tapwater-from-17-cities-in-the-eastern-china-and-their-correlations-with-surface-waters
#1
Ke-Yan Tan, Guo-Hui Lu, Hai-Tao Piao, Shu Chen, Xing-Chun Jiao, Nan Gai, Eriko Yamazaki, Nobuyoshi Yamashita, Jing Pan, Yong-Liang Yang
The contamination status of perfluoroalkyl substances (PFASs) were investigated in 64 tapwater samples collected from 17 cities and 45 surface water samples from adjacent areas in the eastern China. The total PFAS concentrations in tapwater ranged from 1.4 to 175 ng/L; relatively higher PFAS levels were observed in samples collected from the Yangtze River Delta region, which was similar to the geographical distribution pattern of PFAS levels observed in rivers and lakes. The highest total PFASs in tapwater was found in Changshu, where several fluorine-related industries are located, whereas the lowest was observed in Beijing...
May 20, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28527741/reeling-in-the-damages-harmful-algal-blooms-impact-on-lake-erie-s-recreational-fishing-industry
#2
David Wolf, Will Georgic, H Allen Klaiber
Lake Erie is one of the most valuable natural resources in the United States, providing billions of dollars in benefits each year to recreationalists, homeowners and local governments. The ecosystem services provided by Lake Erie, however, are under threat due to harmful algal blooms. This paper provides recreational damage estimates using spatially and temporally varying algae measures and monthly fishing permit sales collected between 2011 and 2014. Results indicate that fishing license sales drop between 10% and 13% when algal conditions surpass the World Health's Organization's moderate health risk advisory threshold of 20,000 cyanobacteria cells/mL...
May 18, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28527389/dynamics-of-dissolved-organic-matter-in-riverine-sediments-affected-by-weir-impoundments-production-benthic-flux-and-environmental-implications
#3
Meilian Chen, Sung-Han Kim, Heon-Jae Jung, Jung-Ho Hyun, Jung Hyun Choi, Hyo-Jin Lee, In-Ae Huh, Jin Hur
In order to understand the characteristics and dynamics of dissolved organic matter (DOM) in the sediment of rivers affected by impoundments, we examined the vertical profiles and the benthic fluxes of DOM in four different core sediments located at upstream sites of weirs in major rivers of South Korea. In three out of four sites, exponential accumulation of dissolved organic carbon (DOC) with depth was observed with the signature of seasonal variability. Except for the site displaying a below-detection limit of Fe(II), the general accumulation trends of DOC with depth was concurrent with the increases of Fe(II) and NH4(+) and the decrease of PO4(3-), signifying a close linkage of the DOM dynamics with anaerobic respiration via iron reduction, an important early diagenesis pathway...
May 12, 2017: Water Research
https://www.readbyqxmd.com/read/28527378/life-cycle-assessment-of-superheated-steam-drying-technology-as-a-novel-cow-manure-management-method
#4
Mohammadmatin Hanifzadeh, Zahra Nabati, Pairote Longka, Pomthong Malakul, Defne Apul, Dong-Shik Kim
Common methods of managing dairy manure are directly applying it to the farm field as a fertilizer. For direct application without any type of treatment, the majority of nutrients in the manure run off to the local river and lake during precipitation periods. The algae bloom is one of the environmental outcomes due to eutrophication of the lakes, which may jeopardize the quality of drinking water. In this study, superheated steam drying (SSD) technology is investigated as an alternative manure management method...
May 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28526121/rates-of-nitrogen-uptake-by-cyanobacterially-dominated-assemblages-in-lake-taihu-china-during-late-summer
#5
Jingjing Yang, Han Gao, Patricia M Glibert, Yu Wang, Mengmeng Tong
Lake Taihu has suffered an increasing number of cyanobacteria harmful algal blooms (CyanoHABs) over the past three decades, bringing about formidable ecological and economical losses. Efforts to control phosphate (P) and/or nitrogen (N) have been applied to mitigate these blooms, but there has been much less attention paid to N and its different forms on the ecology of the blooms. Therefore, kinetic and nutrient enrichment experiments were conducted to assess N uptake rates under differing conditions, and to examine effects of changes in N forms (NH4(+), NO3(-) and urea) and P availability on phytoplankton community physiology...
May 2017: Harmful Algae
https://www.readbyqxmd.com/read/28525783/toolset-for-assessment-of-natural-recovery-from-legacy-contaminated-sediment-case-study-of-pallanza-bay-lake-maggiore-italy
#6
Diana Lin, Yeo-Myoung Cho, Amy Oen, Espen Eek, Jake P Tommerdahl, Richard G Luthy
The aim of this study was to develop a toolset that can be used by site managers to assess and monitor natural attenuation processes in sediments contaminated with legacy hydrophobic organic contaminants. The toolset is composed of sediment traps to measure quality and deposition rate of incoming sediment under different hydrodynamic conditions, sediment cores to show trends in sediment bed concentrations over time, and passive samplers attached to a porewater probe frame to assess the mobility of buried contaminants and possible contaminant flux from sediment...
May 12, 2017: Water Research
https://www.readbyqxmd.com/read/28525656/a-snapshot-on-prokaryotic-diversity-of-the-solim%C3%A3%C2%B5es-river-basin-amazon-brazil
#7
D Toyama, C D Santos-Júnior, L T Kishi, T C S Oliveira, J W Garcia, H Sarmento, F P Miranda, F Henrique-Silva
The Amazon region has the largest hydrographic basin on the planet and 
is well known for its huge biodiversity of plants and animals. However, 
there is a lack of studies on aquatic microbial biodiversity in the 
Solimões River, one of its main water courses. To investigate the 
microbial biodiversity of this region, we performed 16S rRNA gene clone 
libraries from Solimões River and adjacent rivers and lakes. Our question was which microorganisms inhabit the different types of aquatic 
environments in this part of the basin, and how diversity varies among 
these environments (rivers and lakes)...
May 18, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28524869/characterising-and-predicting-cyanobacterial-blooms-in-an-8-year-amplicon-sequencing-time-course
#8
Nicolas Tromas, Nathalie Fortin, Larbi Bedrani, Yves Terrat, Pedro Cardoso, David Bird, Charles W Greer, B Jesse Shapiro
Cyanobacterial blooms occur in lakes worldwide, producing toxins that pose a serious public health threat. Eutrophication caused by human activities and warmer temperatures both contribute to blooms, but it is still difficult to predict precisely when and where blooms will occur. One reason that prediction is so difficult is that blooms can be caused by different species or genera of cyanobacteria, which may interact with other bacteria and respond to a variety of environmental cues. Here we used a deep 16S amplicon sequencing approach to profile the bacterial community in eutrophic Lake Champlain over time, to characterise the composition and repeatability of cyanobacterial blooms, and to determine the potential for blooms to be predicted based on time course sequence data...
May 19, 2017: ISME Journal
https://www.readbyqxmd.com/read/28523826/occurrence-and-abundance-of-ammonia-oxidizing-archaea-and-bacteria-from-the-surface-to-below-the-water-table-in-deep-soil-and-their-contributions-to-nitrification
#9
Lei Zheng, Xue Zhao, Guibing Zhu, Wei Yang, Chao Xia, Tao Xu
Using molecular biology methods (qualitative and quantitative PCR), we determined the occurrence and abundance of ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) from a dry inland soil in Basel, Switzerland, and from the riparian zone of Baiyangdian Lake, China. We also determined the contributions of these microorganisms to ammonia oxidization at different depths based on the nitrification rate. The number of archaeal amoA genes (the key functional gene in AOA) was larger than the number of bacterial amoA genes in each sample, suggesting a dominant role for the AOA amoA gene in environments with a low ammonium concentration...
May 19, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28523397/the-heterogeneity-of-composition-and-assembly-processes-of-the-microbial-community-between-different-nutrient-loading-lake-zones-in-taihu-lake
#10
Dayong Zhao, Xinyi Cao, Rui Huang, Jin Zeng, Feng Shen, Huimin Xu, Sichen Wang, Xiaowei He, Zhongbo Yu
To investigate the differences in the microbial community composition and assembly process in two lake zones (Meiliang Bay (MLB) and Xukou Bay (XKB) in Taihu Lake, China) with different nutrient loadings, water samples were collected. Both the 16S ribosomal RNA (rRNA) gene for the bacterial community and the 18S rRNA gene for the microeukaryote community were investigated using the Illumina second-generation sequencing platform (2 × 250 paired-end). The results indicated that both the bacterioplankton and microeukaryote community composition derived from the two lake zones were significantly different...
May 18, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28522869/ancient-river-inference-explains-exceptional-oriental-freshwater-mussel-radiations
#11
Ivan N Bolotov, Alexander V Kondakov, Ilya V Vikhrev, Olga V Aksenova, Yulia V Bespalaya, Mikhail Yu Gofarov, Yulia S Kolosova, Ekaterina S Konopleva, Vitaly M Spitsyn, Kitti Tanmuangpak, Sakboworn Tumpeesuwan
The concept of long-lived (ancient) lakes has had a great influence on the development of evolutionary biogeography. According to this insight, a number of lakes on Earth have existed for several million years (e.g., Baikal and Tanganyika) and represent unique evolutionary hotspots with multiple intra-basin radiations. In contrast, rivers are usually considered to be variable systems, and the possibility of their long-term existence during geological epochs has never been tested. In this study, we reconstruct the history of freshwater basin interactions across continents based on the multi-locus fossil-calibrated phylogeny of freshwater mussels (Unionidae)...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28522726/draft-genome-sequences-of-bacillus-cereus-e41-and-bacillus-anthracis-f34-isolated-from-algerian-salt-lakes
#12
Mohamed Seghir Daas, Albert Remus R Rosana, Jeella Z Acedo, Farida Nateche, Salima Kebbouche-Gana, John C Vederas, Rebecca J Case
Two strains of Bacillus, B. cereus E41 and B. anthracis F34, were isolated from a salt lake in Aïn M'lila-Oum El Bouaghi, eastern Algeria, and Ain Baida-Ouargla, southern Algeria, respectively. Their genomes display genes for the production of several bioactive secondary metabolites, including polyhydroxyalkanoate, iron siderophores, lipopeptides, and bacteriocins.
May 18, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28520973/mode-of-action-analysis-for-rat-hepatocellular-tumors-produced-by-the-synthetic-pyrethroid-momfluorothrin-evidence-for-activation-of-the-constitutive-androstane-receptor-car-and-mitogenicity-in-rat-hepatocytes
#13
Yu Okuda, Masahiko Kushida, Kayo Sumida, Hirohisa Nagahori, Yoshimasa Nakamura, Hashihiro Higuchi, Satoshi Kawamura, Brian G Lake, Samuel M Cohen, Tomoya Yamada
High dietary levels of momfluorothrin, a non-genotoxic synthetic pyrethroid, induced hepatocellular tumors in male and female Wistar rats in a 2-year bioassay. The mode of action (MOA) for rat hepatocellular tumors was postulated to occur via activation of the constitutive androstane receptor (CAR), as momfluorothrin is a close structural analogue of the pyrethroid metofluthrin, which is known to produce rat liver tumors through a CAR-mediated MOA. To elucidate the MOA for rat hepatocellular tumor formation by momfluorothrin, this study was conducted to examine effects on key and associative events of the CAR-mediated MOA for phenobarbital based on the International Programme on Chemical Safety (IPCS) framework...
May 17, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28518020/outbreaks-of-tilapia-lake-virus-infection-thailand-2015-2016
#14
Win Surachetpong, Taveesak Janetanakit, Nutthawan Nonthabenjawan, Puntanat Tattiyapong, Kwanrawee Sirikanchana, Alongkorn Amonsin
During 2015-2016, several outbreaks of tilapia lake virus infection occurred among tilapia in Thailand. Phylogenetic analysis showed that the virus from Thailand grouped with a tilapia virus (family Orthomyxoviridae) from Israel. This emerging virus is a threat to tilapia aquaculture in Asia and worldwide.
June 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28516498/non-parallel-divergence-across-freshwater-and-marine-three-spined-stickleback-gasterosteus-aculeatus-populations
#15
J M Pujolar, A L Ferchaud, D Bekkevold, M M Hansen
This work investigated whether multiple freshwater populations of three-spined stickleback Gasterosteus aculeatus in different freshwater catchments in the Jutland Peninsula, Denmark, derived from the same marine populations show repeated adaptive responses. A total of 327 G. aculeatus collected at 13 sampling locations were screened for genetic variation using a combination of 70 genes putatively under selection and 26 neutral genes along with a marker linked to the ectodysplasin gene (eda), which is strongly correlated with plate armour morphs in the species...
May 17, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28516406/degradation-and-adsorption-of-tralkoxydim-in-chinese-soils-and-water-sediment-environments
#16
Wen Zhu Wu, Zheng Jun Shan, De Yang Kong, Jian He
Tralkoxydim is a cyclohexanedione herbicide primarily used for gramineous weed control in China. In this paper, we present results of a tralkoxydim laboratory environmental fate study characterizing its degradation, adsorption, and mobility behavior in three different soils and two water-sediment systems (river and lake) in China. Degradation half-life of tralkoxydim in soil under aerobic conditions was 5.1, 7.7, and 7.9 days in Jiangxi red soil, Taihu paddy soil, and Northeast China black soil, respectively...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28516210/antibiotic-resistance-genes-in-surface-water-of-eutrophic-urban-lakes-are-related-to-heavy-metals-antibiotics-lake-morphology-and-anthropic-impact
#17
Yuyi Yang, Chen Xu, Xinhua Cao, Hui Lin, Jun Wang
Urban lakes are impacted by heavy human activities and represent potential reservoirs for antibiotic resistance genes. In this study, six urban lakes in Wuhan, central China were selected to analyze the distribution of sulfonamide resistance (sul) genes, tetracycline resistance (tet) genes and quinolone resistance (qnr) genes and their relationship with heavy metals, antibiotics, lake morphology and anthropic impact. sul1 and sul2 were detected in all six lakes and dominated the types of antibiotic resistance genes, which accounted for 86...
May 17, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28515873/brain-morphology-of-the-threespine-stickleback-gasterosteus-aculeatus-varies-inconsistently-with-respect-to-habitat-complexity-a-test-of-the-clever-foraging-hypothesis
#18
Newaz I Ahmed, Cole Thompson, Daniel I Bolnick, Yoel E Stuart
The Clever Foraging Hypothesis asserts that organisms living in a more spatially complex environment will have a greater neurological capacity for cognitive processes related to spatial memory, navigation, and foraging. Because the telencephalon is often associated with spatial memory and navigation tasks, this hypothesis predicts a positive association between telencephalon size and environmental complexity. The association between habitat complexity and brain size has been supported by comparative studies across multiple species but has not been widely studied at the within-species level...
May 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28515237/increasing-the-illumination-slowly-over-several-weeks-protects-against-light-damage-in-the-eyes-of-the-crustacean-mysis-relicta
#19
Martta L M Viljanen, Noora E Nevala, Cecilia L Calais-Granö, K Magnus W Lindström, Kristian Donner
The eyes of two glacial-relict populations of opossum shrimp Mysis relicta inhabiting the different photic environments of a deep, dark-brown freshwater lake and a variably lit bay of the Baltic Sea differ in their susceptibility to functional depression from strong light exposures. The lake population is much more vulnerable than the sea population. We hypothesized that the difference reflects physiological adaptation mechanisms operating on long time scales rather than genetically fixed differences between the populations...
May 17, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28514630/speciation-and-the-latitudinal-diversity-gradient-insights-from-the-global-distribution-of-endemic-fish
#20
Patrick J Hanly, Gary G Mittelbach, Douglas W Schemske
The nearly universal pattern that species richness increases from the poles to the equator (the latitudinal diversity gradient [LDG]) has been of intense interest since its discovery by early natural-history explorers. Among the many hypotheses proposed to explain the LDG, latitudinal variation in (1) productivity, (2) time and area available for diversification, and (3) speciation and/or extinction rates have recently received the most attention. Because tropical regions are older and were formerly more widespread, these factors are often intertwined, hampering efforts to distinguish their relative contributions to the LDG...
June 2017: American Naturalist
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