<abstract xmlns="http://www.w3.org/1999/xhtml"><p> This study compares the vegetation and seed deposits of free-flowing parts of a river with those regulated by straightening, as well as identifying the correlation between the breadth of the river-bed, existent vegetation and distribution of plant species along the river corridor. The 31 sampling plots in the Ukrainian Carpathians, at an equal distance of four km from each other, were positioned across different vegetation zones. Vegetation and seed bank data were collected. The study showed that effective distribution of plants has a place in native (non-regulated) river-corridors with a river-bed breadth of 15-30 m. The reduction and straightening of the river-bed decrease the number of species that can be dispersed along river. The percentage of seeds of alien species greatly increases, from 0.1% in the free-flowing to 10% in the regulated parts of rivers. River regulation causes transformation of native vegetation communities in these plots into associations of invasive herbaceous perennial species; such as associations of Helianthus tuberosus and Solidago gigantea. The analyses do not show a clear link between the breadth of the river-bed and number of invasive species in the vegetation community. The research suggests that river regulation has a clear negative effect on vegetation by decreasing the resistance of plant communities to alien species</p></abstract>

This study compares the vegetation and seed deposits of free-flowing parts of a river with those regulated by straightening, as well as identifying the correlation between the breadth of the river-bed, existent vegetation and distribution of plant species along the river corridor. The 31 sampling plots in the Ukrainian Carpathians, at an equal distance of four km from each other, were positioned across different vegetation zones. Vegetation and seed bank data were collected. The study showed that effective distribution of plants has a place in native (non-regulated) river-corridors with a river-bed breadth of 15-30 m. The reduction and straightening of the river-bed decrease the number of species that can be dispersed along river. The percentage of seeds of alien species greatly increases, from 0.1% in the free-flowing to 10% in the regulated parts of rivers. River regulation causes transformation of native vegetation communities in these plots into associations of invasive herbaceous perennial species; such as associations of Helianthus tuberosus and Solidago gigantea. The analyses do not show a clear link between the breadth of the river-bed and number of invasive species in the vegetation community. The research suggests that river regulation has a clear negative effect on vegetation by decreasing the resistance of plant communities to alien species

Effects of River Regulation on Plant Dispersal and Vegetation

National Academy of Sciences of Ukraine, State Museum of Natural History, Teatralna Street 18, Lviv, Ukraine, UA-79008

WWF Danube-Carpathian Programe in Ukraine, Mushaka Street 42, Lviv, Ukraine

Transylvanian Review of Systematical and Ecological Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"Effects of River Regulation on Plant Dispersal and Vegetation"}

This study compares the vegetation and seed deposits of free-flowing parts of a river with those regulated by straightening, as well as identifying the...

Effects of River Regulation on Plant Dispersal and Vegetation

Publié en ligne: 08 sept. 2015

Pages: 145 - 154

DOI: https://doi.org/10.1515/trser-2015-0009

Mots clés
river corridors, seed bank, river regulation, plant dispersal invasions

© 2015

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Effects of River Regulation on Plant Dispersal and Vegetation

Publié en ligne: 08 sept. 2015

Pages: 145 - 154

DOI: https://doi.org/10.1515/trser-2015-0009

Mots clésriver corridors, seed bank, river regulation, plant dispersal invasions

© 2015

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Mots clés
river corridors, seed bank, river regulation, plant dispersal invasions