<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The studies of the pioneer vegetation of freshwater shorelines of water bodies are of particular interest owing to the specific ecology of these habitats and the short cycle for their development in which periods of flooding and subsequent drainage alternate. Using the methods of phytosociological classification and cluster analysis based on the interpretation of 414 phytosociological relevés, the syntaxonomic structure of the pioneer vegetation of freshwater shorelines of the water bodies of Ukraine has been established that are represented by the phytosociological classes <italic>Isoëto-Nanojuncetea</italic> and <italic>Bidentetea</italic>. The class <italic>Isoëto-Nanojuncetea</italic> includes 8 associations that belong to 2 alliances and 1 order and the class <italic>Bidentetea</italic> includes 10 associations belonging to 2 alliances and 1 order. Phytocoenoses of both classes are more typical for the Polissia region and the forest-steppe zone of Ukraine, where there are favourable habitats with a flat relief, low degree of dissection and a high level of soil humidity. Using a DCA ordination analysis of associations their position in ecological space was determined. It was established that the main factors of ecological differentiation for <italic>Isoëto-Nanojuncetea</italic> habitats are soil humidity, soil aeration, nitrogen content, as well as temperature regime. Differentiation in the hyperspace of abiotic factors of the class <italic>Bidentetea</italic> occurs mainly along the gradients of soil humidity, salt regime and acidity. The ecological distribution of syntaxa of this class is also significantly influenced by the concentration of mineral nitrogen compounds in the soil.</p>
</abstract>

The studies of the pioneer vegetation of freshwater shorelines of water bodies are of particular interest owing to the specific ecology of these habitats and the short cycle for their development in which periods of flooding and subsequent drainage alternate. Using the methods of phytosociological classification and cluster analysis based on the interpretation of 414 phytosociological relevés, the syntaxonomic structure of the pioneer vegetation of freshwater shorelines of the water bodies of Ukraine has been established that are represented by the phytosociological classes Isoëto-Nanojuncetea and Bidentetea. The class Isoëto-Nanojuncetea includes 8 associations that belong to 2 alliances and 1 order and the class Bidentetea includes 10 associations belonging to 2 alliances and 1 order. Phytocoenoses of both classes are more typical for the Polissia region and the forest-steppe zone of Ukraine, where there are favourable habitats with a flat relief, low degree of dissection and a high level of soil humidity. Using a DCA ordination analysis of associations their position in ecological space was determined. It was established that the main factors of ecological differentiation for Isoëto-Nanojuncetea habitats are soil humidity, soil aeration, nitrogen content, as well as temperature regime. Differentiation in the hyperspace of abiotic factors of the class Bidentetea occurs mainly along the gradients of soil humidity, salt regime and acidity. The ecological distribution of syntaxa of this class is also significantly influenced by the concentration of mineral nitrogen compounds in the soil.

Syntaxonomy and ecological differentiation of the pioneer vegetation of Ukraine Classes: <italic>Isoëto-Nanojuncetea, Bidentetea</italic>

Department of Geobotany and Ecology, M.G. Kholodny Institute of Botany

Environmental & Socio-economic Studies

This work is licensed under the Creative Commons Attribution 4.0 International License.

Syntaxonomy and ecological differentiation of the pioneer vegetation of Ukraine Classes: 

The studies of the pioneer vegetation of freshwater shorelines of water bodies are of particular interest owing to the specific ecology of these habitats and...

Syntaxonomy and ecological differentiation of the pioneer vegetation of Ukraine Classes: Isoëto-Nanojuncetea, Bidentetea

Published Online: Sep 30, 2021

Page range: 32 - 52

Received: Apr 13, 2021

Accepted: Aug 25, 2021

DOI: https://doi.org/10.2478/environ-2021-0016

Keywords
phytocoenoses, classification, newly formed ecotopes, DCA ordination, Ukraine

© 2021 Dmytro V. Dubyna et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Syntaxonomy and ecological differentiation of the pioneer vegetation of Ukraine Classes: Isoëto-Nanojuncetea, Bidentetea

Published Online: Sep 30, 2021

Page range: 32 - 52

Received: Apr 13, 2021

Accepted: Aug 25, 2021

DOI: https://doi.org/10.2478/environ-2021-0016

Keywordsphytocoenoses, classification, newly formed ecotopes, DCA ordination, Ukraine

© 2021 Dmytro V. Dubyna et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
phytocoenoses, classification, newly formed ecotopes, DCA ordination, Ukraine