Causes for high concentration of copper and zinc in the water of some lakes in the Southern Urals

Rogozin, A. G.; Gavrilkina, Svetlana V.

doi:10.1134/s0097807808060092

Cited by 5 publications

(2 citation statements)

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“…There is a complete or partial change of the macrophyte community, determined primarily by changing the physical and chemical factors of the environment [17]. The mineralization level and its connection with different quantitative and qualitative characteristics of the macrophyte community formation have been researched repeatedly in different regions [10,12,14,16,17]. But the impact of mineralization factors and pH on the number of individual species has not been quantified.…”

Section: Study Areamentioning

confidence: 99%

Biomonitoring Lake Chebarkul Water on Macrophyte Community, Russia

Mashkova¹

2020

GEOMATE

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The article studies macrophyte biodiversity in Lake Chebarkul (Russia) and the influence of water chemistry on it. The macrophyte community composition is sensitive to any environmental changes. Higher or lower trophic status is the most important factor responsible for changing taxons of high environmental value (sensitive taxon) into potentially ruderal species. This is typical for the areas with an increased anthropogenic impact on the lake. This paper identifies species diversity, the taxonomic structure of aquatic flora for each section of the lake. Macrophytes were studied along the lake shore both with the help of qualitative and quantitative analysis. The lake flora was listed for each lake profile, and then the general list of differences and similarities for all the studied sites was compiled. The final flora list includes about 90 spices plants. According to the study results, the macrophyte species composition of the studied sites is different. 59 % of the total number of taxa was present at all sites, while 9 % of them, mostly sensitive taxa, were found only in a group of points with relatively clean water. However, the overgrowth was highest in the fourth group (102 %), slightly lower at the points of the third group (92 %) and significantly lower in the second (58 %) and first (44 %) groups. The article considers the possibility of bioindication quality with the biomass of common macrophytes-

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Section: Study Areamentioning

confidence: 99%

Biomonitoring Lake Chebarkul Water on Macrophyte Community, Russia

Mashkova¹

2020

GEOMATE

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“…Several stressors affecting transfer of ARGs have been identified; for instance, different kinds of metals such as Cu, Zn, and Hg might influence the occurrence and mobilization of ARGs in the environment since antibiotic and metal resistance genes often co-exist in the same MGE ( Ji et al, 2012 ; Pal et al, 2015 ). These metals can be found in downstream water from mining and industrial areas ( Rogozin and Gavrilkina, 2008 ; Agramont et al, 2020 ). In Bolivia, lakes and rivers located upstream of the La Paz River basin have been shown to be highly impacted by acid mining drainage discharges due to the intensive mining activity carried out during the last century ( Agramont et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Conjugative transfer of multi-drug resistance IncN plasmids from environmental waterborne bacteria to Escherichia coli

et al. 2022

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Watersheds contaminated with municipal, hospital, and agricultural residues are recognized as reservoirs for bacteria carrying antibiotic resistance genes (ARGs). The objective of this study was to determine the potential of environmental bacterial communities from the highly contaminated La Paz River basin in Bolivia to transfer ARGs to an Escherichia coli lab strain used as the recipient. Additionally, we tested ZnSO4 and CuSO4 at sub-inhibitory concentrations as stressors and analyzed transfer frequencies (TFs), diversity, richness, and acquired resistance profiles. The bacterial communities were collected from surface water in an urban site close to a hospital and near an agricultural area. High transfer potentials of a large set of resistance factors to E. coli were observed at both sites. Whole-genome sequencing revealed that putative plasmids belonging to the incompatibility group N (IncN, IncN2, and IncN3) were predominant among the transconjugants. All IncN variants were verified to be mobile by a second conjugation step. The plasmid backbones were similar to other IncN plasmids isolated worldwide and carried a wide range of ARGs extensively corroborated by phenotypic resistance patterns. Interestingly, all transconjugants also acquired the class 1 integron intl1, which is commonly known as a proxy for anthropogenic pollution. The addition of ZnSO4 and CuSO4 at sub-inhibitory concentrations did not affect the transfer rate. Metal resistance genes were absent from most transconjugants, suggesting a minor role, if any, of metals in the spread of multidrug-resistant plasmids at the investigated sites.

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