Publication details

Rozšíření invazních neofytů podél toků severovýchodní Moravy a Slezska

Title in English Distribution of invasive neophytes along the streams in northeastern Moravia and Silesia


Year of publication 2012
Type Article in Periodical
Magazine / Source Zprávy ČBS
MU Faculty or unit

Faculty of Science

Field Botany
Keywords Czech Republic;Moravskoslezské Beskydy Mountains;riparian zones;species richness
Description In summers of 2007, 2008 and 2009 I mapped the occurrence of invasive neophytes along the Morávka, Ostravice, Černá Ostravice, Bílá Ostravice, Baštice, Olešná, Bystrý, Čeladenka and Mohelnice streams in the northeastern Moravia and Silesia, Czech Republic. In total, 163 km of river courses were investigated. I focused on 39 species of invasive neophytes, majority of which belonging to Asteraceae family. The most abundant species growing along the streams were Solidago canadensis (86% of river kilometres), Impatiens parviflora (85%), Reynoutria japonica (66%), I. glandulifera (60%), Juncus tenuis (58%), Erigeron annuus subsp. septentrionalis (57%) and Epilobium ciliatum (49%). The river sections in towns had more invasive species, whereas the river sections outside the towns had fewer invasive species but these species were more abundant. All the surveyed streams were mapped from their sources to their mouths. Species richness of invasive neophytes was influenced mainly by elevation: it strongly decreased towards higher altitudes. It also decreased in river sections with canyons or forests, but it accumulated in towns, villages, in areas with abundant bushes, in places with alluvial gravel accumulation and stream regulation. The number of invasive species was also higher in river sections richer to habitat types.
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