Other formats:
BibTeX
LaTeX
RIS
@proceedings{567277,
author = {Zahrádková, Svetlana and Brabec, Karel and Jarkovský, Jiří and Hodovský, Jan and Kokeš, Jiří and Pařil, Petr and Němejcová, Denisa and Dušek, Ladislav and Štefelová, Bohdana and Hájek, Ondej},
booktitle = {In SIL XXIX Congress Lahti Finland.},
keywords = {Type specific; site specific; typology; species assemblages; benthic macroinvertebrates; Water Framework Directive; PERLA system},
language = {eng},
title = {Abiotic stream types and species assemblages: Is there any simple linkage? Czech streams and benthic macroinvertebrates as an example},
year = {2004}
}
TY - CONF
ID - 567277
AU - Zahrádková, Svetlana - Brabec, Karel - Jarkovský, Jiří - Hodovský, Jan - Kokeš, Jiří - Pařil, Petr - Němejcová, Denisa - Dušek, Ladislav - Štefelová, Bohdana - Hájek, Ondej
PY - 2004
TI - Abiotic stream types and species assemblages: Is there any simple linkage? Czech streams and benthic macroinvertebrates as an example
KW - Type specific
KW - site specific
KW - typology
KW - species assemblages
KW - benthic macroinvertebrates
KW - Water Framework Directive
KW - PERLA system
N2 - Ecological status assessment of water bodies according to the European Water Framework Directive (WFD) is generally based on the comparison of a reference and observed status. There are two basic approaches to define the reference conditions for a particular water body: a site-specific and a type-specific. For the latter, required by the Directive, it is necessary to create a typology of water bodies. The Directive offers two ways (system A, system B) of their inherence based on abiotic descriptors. Within the assessment based on biological elements, various metrics derived from the species assemblage composition are used. The type-specific approach is associated with a multimetric system, i.e. sets of metrics for selected stressors and specific water body types (AQEM consortium 2002). The site-specific approach, which is independent on typology and deals with abiotic conditions (descriptors) of a particular site or stretch, is associated with predictive models like the British RIVPACS (WRIGHT et al. 1993) or analogous the Czech PERLA (KOKEŠ et al. 2001). More or less detailed knowledge of biotic and abiotic conditions of pristine or near natural sites is necessary for both approaches. Due to the fact that the metrics are generally derived from taxonomic composition of the species assemblages, a correspondence between types and these assemblages is essential for the truthfulness of the type-specific approach. Therefore, the selection of abiotic descriptors should be done very carefully. The correspondence among species assemblages of reference sites and abiotic types was tested on Czech streams and benthic macroinvertebrates.
ER -
ZAHRÁDKOVÁ, Svetlana, Karel BRABEC, Jiří JARKOVSKÝ, Jan HODOVSKÝ, Jiří KOKEŠ, Petr PAŘIL, Denisa NĚMEJCOVÁ, Ladislav DUŠEK, Bohdana ŠTEFELOVÁ and Ondej HÁJEK. Abiotic stream types and species assemblages: Is there any simple linkage? Czech streams and benthic macroinvertebrates as an example. In \textit{In SIL XXIX Congress Lahti Finland.}. 2004.
|
