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Auflistung nach Autor:in "Hodovsky, Jan"

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  • Konferenzbeitrag
    Data Analysis and Processing of Biomonitoring Data in the Arrow Project for the Evaluation of Ecological State of Surface Waters in the Czech Republic According to WFD EU
    (Environmental Informatics and Systems Research, 2007) Jarkovsky, Jiri; Kubosova, Klara; Klapka, Radim; Kubik, Vratislav; Racek, Jaroslav; Hodovsky, Jan; Petras, Miroslav
    The project ARROW (Assessment and Reference Reports of Water monitoring http://www.cba.muni.cz/arrow/eng) is focused on the implementation of the EU Water Framework Directive in the monitoring of surface waters of the Czech Republic. The project incorporates both WFD EU demands and complex solution of sampling, biological, analytical and ICT problems. The integral part of the project is also the definition and calibration of reference network of sites. The project is based on long term development of this field in the Czech Republic and is related to parallel project of Ministry of the Environment of the Czech Republic connected to monitoring programs. The solution of the project binds many experts from both scientific and commercial institutions in this field. The focus of the presented paper is the data analysis and processing of data of biological communities in biomonitoring networks for the evaluation of the ecological state of the surface water.
  • Konferenzbeitrag
    Implementation of Data Sources for Analysis of Obligatory Level of Taxa Determination for Routine Biomonitoring
    (Managing Environmental Knowledge, 2006) Nemethova, Danka; Jarkovsky, Jiri; Gelnarova, Eva; Kubosova, Klara; Racek, Jaroslav; Hodovsky, Jan
    Although taxonomy or generally biological determination is unavoidable indication component in most of ecological risk assessment studies, its implementation in standard methodical guidelines is often limited by complicated structure of biological communities. The species richness thus increases cost of the determination as well as requirements for experts and time. Our aim here is to document feasibility of optimizing reduction of taxonomic units that are necessary to guarantee still representative and safe scenario of risk assessment studies. This analysis should ensure i) acquisition of information on relationship between the communities and their environment, ii) decreased time and financial costs paid for taxonomic determination, iii) prevention of wrong determination with no relevance to the assessed situation. The proposed environmentally-oriented scoring of taxa consists of two steps, both requires also experts from given biological field and therefore are community-specific. First of all, the index of determination quality and the index of taxon indicative power are computed over reference data set. In the second step, the analysis of valences, similarity of species traits and joint occurrence of species are used for their aggregation in taxonomic tree where we can easily find the proper “cut-off” levels. Proper taxonomic level should be characterized by low demand on determination, however accompanied with still clear association with environmental conditions. The proposed scoring of macrozoobenthos taxa was tested over the dataset of more than 600 reference and contaminated sites. The data sources for analysis are databases of the Czech national information systems storing long-term environmental monitoring data. The results will be incorporated in the standard biomonitoring network of the Czech Republic according to implementation rules of WFD EU.
  • Konferenzbeitrag
    Information System of ARROW Project: Assessment of Ecological State of Surface Waters
    (Managing Environmental Knowledge, 2006) Jarkovsky, Jiri; Racek, Jaroslav; Nemethova, Danka; Pavlis, Petr; Braabec, Petr; Hrebicek, Jiri; Hodovsky, Jan
    The ARROW (Assessment and Reference Reports of Water monitoring http://www.cba.muni.cz/arrow/eng) project is the project of implementation of EU Water Framework Directive in the monitoring of surface waters of the Czech Republic and covers all aspects of this problem from data sampling to informatics solution (focusing on the ecostat). The project is based on long term development of this field in the Czech Republic and it is carried out under the supervision of the Ministry of the Environment of the Czech Republic. The important part of the ARROW project is the development and implementation of a Czech approach to the evaluation of the ecological state of surface waters using an analysis of monitoring data. The main idea of the system is an approach based on a network of reference sites and robust multivariate modeling of expected environmental and biological conditions (could be called “RIVPACS type”). The approach presented is compatible with the EU Water Framework Directive and will be implemented in the national-wide information system of the ecological state of surface waters of the Czech Republic.