The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform

Elena Krupa - One of the best experts on this subject based on the ideXlab platform.

  • The ecological preferences of Eurytemora affinis (Poppe, 1880) in the water bodies of Kazakhstan (Central Asia) and some notes about Eurytemora caspica Sukhikh & Alekseev, 2013
    Crustaceana, 2020
    Co-Authors: Elena Krupa
    Abstract:

    Abstract The purpose of this work is to analyse the influence of external factors on quantitative variables of Eurytemora affinis in water bodies of Kazakhstan. In 1997-2018, more than 150 water bodies located in various regions of the country were surveyed. The results obtained and analysis of the published literature showed that E. affinis primarily inhabits small shallow water bodies of Central and Eastern Kazakhstan. Populations from the North-Eastern Caspian Sea, originally identified as “Eurytemora affinis”, could be attributed to the recently described species Eurytemora caspica. In the water bodies examined, E. affinis was found at water temperatures from 12 to 25°C and at salinities from 0.2 to 7.1 g/dm3. The highest abundance of Eurytemora was recorded at 21-22°C and a salinity of 1.0-3.0 g/dm3. The optimum temperature range in the water bodies examined in an extreme continental climate is higher than the values given for E. affinis in water bodies in a moderately temperate climate. The optimal TDS [Total Dissolved Solids] value (1.0-3.0 g/dm3) has shifted towards more truly fresh waters than was stated for E. affinis collected from the sea (6.2-8.2), and this was confirmed in experiments (from 3.0-10.0 to 10.0-15.0). In the majority of the examined water bodies of Kazakhstan, males dominated the Eurytemora populations. Male dominance in E. affinis populations might be due to the adverse effect of elevated temperature on the lifespan of females, and it was also connected with the level of Toxic Pollution of the water bodies. It seems that E. affinis endures a relatively high content of heavy metals, but it does not inhabit water bodies with very high Toxic Pollution. The revealed features of E. affinis’ biology in Kazakhstan water bodies might be associated with both the heterogeneity of its populations from different parts of the range, and the existence of a complex of closely related species that at present is collectively named “Eurytemora affinis”.

  • The Role of Planktonic Algae in the Ecological Assessment of Storage-Reservoirs of the ILI-Balkhash Basin
    Transylvanian Review of Systematical and Ecological Research, 2018
    Co-Authors: Sophia Barinova, Elena Krupa, Sophia Romanova
    Abstract:

    Abstract The largest wastewater treatment systems include Sorbulak and Kurty reservoirs, and the small storage ponds were studied in the summer of 2017 and characterized mainly by organic Pollution. Phytoplankton communities were represented by species tolerant of organic and Toxic Pollution. Cyanobacteria dominated in the reservoirs, and dinophyte algae were only in the Kurty Reservoir. According to the results of CCA analysis, only Cr and certain nutrients had a significant effect on the abundance of algae. A statistically positive significant association between the Shannon index and the average algal cell mass was established. The results obtained are a particular example reflecting the non-linearity of changes in plankton communities in the gradient of nutrient loading and eutrophication of aquatic ecosystems.

  • Structural characteristics of zooplankton of the Shardarinskoe Reservoir and their use in water quality assessment
    Water Resources, 2007
    Co-Authors: Elena Krupa
    Abstract:

    Data on the Shardarinskoe Reservoir are used to assess the indicator role of zooplankton community under unstable hydrological regime. The structural characteristics of zooplankton featured significant seasonal variations. The averaged indices characterized reservoir water quality at the level of mesotrophic and eutrophic water bodies. The possible use of cyclopidas to characterize Toxic Pollution of water is discussed.

  • Population Densities, Sex Ratios of Adults, and Occurrence of Malformations in Three Species of Cyclopoid Copepods in Waterbodies with Different Degrees of Eutrophy and Toxic Pollution
    Journal of Marine Science and Technology, 2005
    Co-Authors: Elena Krupa
    Abstract:

    The population structure of three common cyclopoid copepods, Acanthocyclops robustus Sars, Cyclops vicinus Uljanin, and Thermocyclops crassus Fischer, inhabiting waterbodies with different degrees of eutrophy and levels of Toxic Pollution is examined in this paper. Degree of eutrophy was estimated using phosphorus concentration (total PO4-P), and the level of Toxic Pollution by the concentration of heavy metals. The following population characters were studied: density, sex ratio of adults, and the presence and frequency of morphological abnormalities. Dominance of Acanthocyclops robustus increased with increasing eutrophy. Cyclops vicinus formed summer generations in eutrophic waterbodies. Thermocyclops crassus is typical of mesotrophic waterbodies with phosphorus concentrations about 20-50μg l^(-1). A trend toward population masculinization appeared in Acanthocyclops robustus, and was positively correlated with the degree of eutrophy. The observed sex ratio in Cyclops vicinus varied widely from male dominance to female dominance. Females of Thermocyclops crassus dominated in almost all the waterbodies examined. Malformed specimens of Acanthocyclops robustus and Cyclops vicinus were found in waterbodies with heavy-metal concentrations above 15-20μg l^(-1).

Werner Brack - One of the best experts on this subject based on the ideXlab platform.

  • Microbial reporter gene assay as a diagnostic and early warning tool for the detection and characterization of Toxic Pollution in surface waters
    Environmental toxicology and chemistry, 2015
    Co-Authors: Christine Hug, Xiaowei Zhang, Miao Guan, Martin Krauss, Robert Bloch, Tobias Schulze, Tim Reinecke, Henner Hollert, Werner Brack
    Abstract:

    Surface water samples constantly receive a vast mixture of micropollutants mainly originating from wastewater treatment plants (WWTPs). High-throughput live cell arrays provide a promising method for the characterization of the effects of chemicals and the associated molecular mechanisms. In the present study, this test system was evaluated for the first time for the characterization of a set of typical surface water extracts receiving effluent from WWTPs. The extracts containing complex mixtures of micropollutants were analyzed for the expression of 90 stress responsive genes in the Escherichia coli reporter gene assay. The most affected pathways and the genes most sensitive to surface water samples suggested prominent stress-responsive pathways for wastewater-impacted surface water, such as oxidative stress, DNA damage, and drug resistance. Samples strongly affecting particular pathways were identified by statistical analysis of gene expression. Transcription data were correlated with contamination data from chemical screening and percentages of wastewater in the samples. Samples with particular effects and outstanding chemical composition were analyzed. For these samples, hypotheses on the alteration of the transcription of genes involved in drug resistance and DNA repair attributable to the presence of pharmaceuticals were drawn.

  • Innovative biodiagnosis meets chemical structure elucidation - New tools in effect directed analysis to support the identification and monitoring of emerging Toxicants on a European scale (EDA-EMERGE)
    2012
    Co-Authors: Werner Brack, Jaroslav Slobodnik, H. Hollert, Marja Lamoree, Selim Ait-aissa, Valeria Dulio, J. Hollender, K. Schirmer, M. Schriks, M. Ahel
    Abstract:

    EDA-EMERGE aims to train a new generation of young scientists in the interdisciplinary techniques required to meet the major challenges in the monitoring, assessment and management of Toxic Pollution in European river basins considering the enormous complexity of contamination, effects and cause-effect relationships. By integrating innovative mode-of-action based biodiagnostic tools including in vitro tests, transgenic organisms and 'omics'techniques with powerful fractionation and cutting edge analytical and computational structure elucidation tools, a new generation of effect directed analysis (EDA) approaches will be developed for the identification of Toxicants in European surface and drinking waters. Innovative method development by young researchers at major universities, research centres and private companies will be closely interlinked with a joint European demonstration program and higher tier EDA and extensive training courses. EDA-EMERGE ESRs will learn to organise and run international and interdisciplinary sampling and monitoring campaigns and benefit from the expertise of one of the most experienced private companies in this field. Strong networking between academia, the private sector and leading regulators in the field of river basin management and Pollution management ensures the relevance of the research for practice and excellent employment opportunities for EDA-EMERGE ESRs.

A. Benhammou - One of the best experts on this subject based on the ideXlab platform.

  • Detection of Toxic Pollution in Waste Water by Short-Term Respirometry
    Environmental Chemistry, 2005
    Co-Authors: S. Le Bonté, Olivier Potier, C. Plançon, A. Alinsafi, M.-n. Pons, A. Benhammou
    Abstract:

    A short-term batch respirometric test coupled with ultraviolet (UV) photometry was developed to detect the presence in waste water of Toxic substances such as heavy metals, cleaning and sanitising agents, and textile dyes. Tests have been performed on a waste water plant containing various Toxic substances in order to assess the usefulness of this global sensor for detecting Toxic events. Short-term respirometry gives an estimation of the immediate biological activity, which is influenced by the consumption of rapidly biodegradable pollutants and by potential inhibition. To separate both effects, we combined short-term respirometry with a rapid estimation of Pollution by UV-spectrophotometry.

Christine Hug - One of the best experts on this subject based on the ideXlab platform.

  • Microbial reporter gene assay as a diagnostic and early warning tool for the detection and characterization of Toxic Pollution in surface waters
    Environmental toxicology and chemistry, 2015
    Co-Authors: Christine Hug, Xiaowei Zhang, Miao Guan, Martin Krauss, Robert Bloch, Tobias Schulze, Tim Reinecke, Henner Hollert, Werner Brack
    Abstract:

    Surface water samples constantly receive a vast mixture of micropollutants mainly originating from wastewater treatment plants (WWTPs). High-throughput live cell arrays provide a promising method for the characterization of the effects of chemicals and the associated molecular mechanisms. In the present study, this test system was evaluated for the first time for the characterization of a set of typical surface water extracts receiving effluent from WWTPs. The extracts containing complex mixtures of micropollutants were analyzed for the expression of 90 stress responsive genes in the Escherichia coli reporter gene assay. The most affected pathways and the genes most sensitive to surface water samples suggested prominent stress-responsive pathways for wastewater-impacted surface water, such as oxidative stress, DNA damage, and drug resistance. Samples strongly affecting particular pathways were identified by statistical analysis of gene expression. Transcription data were correlated with contamination data from chemical screening and percentages of wastewater in the samples. Samples with particular effects and outstanding chemical composition were analyzed. For these samples, hypotheses on the alteration of the transcription of genes involved in drug resistance and DNA repair attributable to the presence of pharmaceuticals were drawn.

S. Le Bonté - One of the best experts on this subject based on the ideXlab platform.

  • Detection of Toxic Pollution in Waste Water by Short-Term Respirometry
    Environmental Chemistry, 2005
    Co-Authors: S. Le Bonté, Olivier Potier, C. Plançon, A. Alinsafi, M.-n. Pons, A. Benhammou
    Abstract:

    A short-term batch respirometric test coupled with ultraviolet (UV) photometry was developed to detect the presence in waste water of Toxic substances such as heavy metals, cleaning and sanitising agents, and textile dyes. Tests have been performed on a waste water plant containing various Toxic substances in order to assess the usefulness of this global sensor for detecting Toxic events. Short-term respirometry gives an estimation of the immediate biological activity, which is influenced by the consumption of rapidly biodegradable pollutants and by potential inhibition. To separate both effects, we combined short-term respirometry with a rapid estimation of Pollution by UV-spectrophotometry.