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@article{710585, author = {Kokeš, J. and Zahrádková, Světlana and Němejcová, Denisa and Hodovský, Jan and Jarkovský, Jiří and Soldán, T.}, article_location = {Netherlands}, article_number = {566}, keywords = {benthic macroinvertebrates; ecological quality; stream assessment; typology; classification}, language = {eng}, issn = {0018-8158}, journal = {Hydrobiologia}, title = {The PERLA system in the Czech Republic: a multivariate approach for assessing the ecological status of running waters}, volume = {2006}, year = {2006} }
TY - JOUR ID - 710585 AU - Kokeš, J. - Zahrádková, Světlana - Němejcová, Denisa - Hodovský, Jan - Jarkovský, Jiří - Soldán, T. PY - 2006 TI - The PERLA system in the Czech Republic: a multivariate approach for assessing the ecological status of running waters JF - Hydrobiologia VL - 2006 IS - 566 SP - 343-354 EP - 343-354 PB - Kluwer Academic Publishers SN - 00188158 KW - benthic macroinvertebrates KW - ecological quality KW - stream assessment KW - typology KW - classification N2 - The assessment of running water quality has a long tradition in the Czech Republic, but in the past it focused on the evaluation of organic pollution using the saprobic system. Considering the modern trends of stream ecological status evaluation in water management a new assessment system named PERLA was developed. The system is a complex of biological methods of ecological status assessment of running waters and connected activities in the Czech Republic. It involves 300 reference sites with respective biotic and abiotic data and a prediction model using a newly developed software HOBENT. The model generally follows the published mathematical principles of RIVPACS and represents the site specific and stressor non-specific approaches. The HOBENT software allows the prediction of the target assemblage of benthic macroinvertebrates for any site based on a set of environmental variables (latitude, longitude, distance from source, altitude, slope, catchment area, and stream order) which characterise the site. The predicted assemblage can be compared with the fauna observed at the same site. The comparison makes it possible to evaluate the extent of disturbance, expressed by index B. The model allows to evaluate spring, summer, and autumn seasonal data of the majority of wadable streams in the Czech Republic. The practical application of the PERLA system has started in 2001. ER -
KOKEŠ, J., Světlana ZAHRÁDKOVÁ, Denisa NĚMEJCOVÁ, Jan HODOVSKÝ, Jiří JARKOVSKÝ a T. SOLDÁN. The PERLA system in the Czech Republic: a multivariate approach for assessing the ecological status of running waters. \textit{Hydrobiologia}. Netherlands: Kluwer Academic Publishers, 2006, roč.~2006, č.~566, s.~343-354, 11 s. ISSN~0018-8158.
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