Macrophytobenthos of artificial ponds in the parks of Odessa city

Keywords: macrophytobenthos; bioindicators; freshwater artificial ponds; pollution; ecology; Odessa

Abstract

Complex eco-floristic investigation of water vegetation of the artificial ponds in the park zones of Odessa city has not been conducted. Thus, the purpose of this work was determination of species diversity of macrophytes, their systematic structure and indicator role in four ponds in the park of the city. In sum, 21 species of macrophytes were identified, among them 15 species of macrophyte algae and 6 species of vascular water plants. The main part of the revealed species of macrophyte algae belongs to Chlorophyta (8) and Charophyta (4). Cyanoprocaryota were presented by 2 species, and Ochrophyta (Xanthophyceae) were presented by 1 species. 6 widely distributed species were revealed among higher water plants. Composition and distribution of macrophytes in the investigated ponds were influenced primarily by the level of water mineralization, eutrophication and heavy metals contamination. Elevated concentration of organic Carbon was registered in the ponds where waterfowl birds were presented together with water plants. The biggest floristic diversity of macrophytes is registered in the upper pond of the Dyukovsky Park (17 species). It is one of the largest artificial ponds of the city. The characteristic feature of the pond’s vegetation is the presence of an extensive field of Charophyta with a monodominant Chara vulgaris. The presence of the Charophyta is the evidence of the relative ecologic well-being of the investigated pond. Charophyta, as well as the other algae, are obviously the main providers of organic Carbon in the pond (Corg.=1.38%). By the quantity of macrophytes species (10) the lower pond of the Dyukovsky Park is on the second place. The content of organic Carbon is the highest in this pond (Corg.=4.48%). Except for the water vegetation, a considerable contribution in this parameter is obviously made by the decorative ducks which are kept in the fenced off with a net part of the pond by the bank restaurant. The minimum number of species of algae and higher water plants is registered in the Savitsky Park (5) and the Victory Park (6). In the Savitsky Park the excessive biogenic substances cause massive development of meso-eutrophic species of macrophytes – Lemna minor which covers almost the entire surface of the pond and creates adverse light regime for the development of algae. In the water column only sparse specimens of green algae Scenedesmus quadricauda (Turpin) Brebisson and Desmidium sp. were registered. Among the bank of the pond intermitted thicket of Typha angustifolia and Persicaria hydropiper is located. Macrophytes are the primary producers of organic substances here (Corg.=1.94%). Indicator species of algae and higher water plants in the investigated ponds were presented mostly by β-mesosaprobic group. It is the evidence of the medium level of their organic contamination.

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Author Biographies

F. Tkachenko, Odessa I.I.Mechnikov National University

Dvoryanskaya Str., 2, Odessa, Ukraine, 65082, tvf@ukr.net

M. Sidorenko, Odessa I.I.Mechnikov National University

Dvoryanskaya Str., 2, Odessa, Ukraine, 65082, m.v.sidorenko2000@gmail.com

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Published
2019-02-22
Cited
How to Cite
Tkachenko, F., & Sidorenko, M. (2019). Macrophytobenthos of artificial ponds in the parks of Odessa city. The Journal of V.N.Karazin Kharkiv National University. Series «Biology», 31(31), 31-38. https://doi.org/10.26565/2075-5457-2018-31-4
Section
BOTANY