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Plant communities in drainage ditches – conditions, characteristics and environmental functions

100%

Kiryluk A.

Studia Quaternaria

2022

tom Vol. 39, Nr 1

31--40

Ditches and drainage canals are an important element in the post-bog meadows. Their basic function is to regulate air-water relations in ecosystems, mainly in agrocenoses. The environmental functions of ditches and canals consist of maintaining a large diversity of flora and fauna species due to high humidity of these ecosystems. The study of plant communities in the ditches in the post-bog meadows habitat of the Supraśl Dolna valley structure in 2010–2020 was carried out. There were 23–27 species of plants in the ditches. Species diversity did not change significantly during this period, while changes in individual species’ coverage and viability were found. The species were classified into two rush communities: reed rush ( Phragmitetum australis) and rush ( Phalaridetum arundinaceae). As a result of the lack of maintenance of the ditches, an invasive species of flapped barbed ( Echinocystis lobata) was found. The natural valorization carried out by the Oświt method showed that plant communities in the drainage ditches are in the lowest valorization classes.

Flood protection in highly valuable river ecosystems - middle delta system of the Nida River

58%

Struzynski A.

Electronic Journal of Polish Agricultural Universities. Series Environmental Development

2011

tom 14

nr 2

Peat soils as a buffer system for valley ecosystems

58%

Wozniak L.

tom 26

The research was carried out in the drained lowland bogs of the Lower San Valley.Special attention was paid to the role of peatbogs in reducing migration of the surplus biogenic and toxic elements.Land drainage carried out in the routine was together with synergistic drainage exploitationof deep waters results in progressing degradation of peat soils. Their capability of accumulating nitrogen,calcium and phosphorus, basic biogenic elements influencing eutrophication of the waters is declining. Mineralizing organic matterbecomes a secondary source of pollution, releasing huge amounts of biogenes and toxic heavy metals store on the surface; this process can be seen well in the profile of degraded fragments of the objest under research. Hydrophobic muck horizons also lose their ability to neutralise extreme conditions of droughts and floods. The remaining peat soils of the San Valley require protection, and even renaturization.