ANALYSIS OF THE DEPENDENCE OF THE COMPOSITION OF THE METABOLOME OF HIGHER AQUATIC VEGETATION AND PHYTOPLANKTON ASSOCIATIONS TO ASSESS THE ECOLOGICAL STATE OF THE WATER ECOSYSTEM (LAKE SUURI)
Published: 21 Sep 2020
Abstract: Aquatic and coastal macrophytes play an important role in the formation of the chemical composition of organic matter in fishery reservoirs. The success of the study of low-molecular-weight organic compounds of aquatic plants shows that they are one of the most important factors in the formation of hydrobiocenoses in the littoral of lakes. Higher aquatic plants are one of the key components of inland water bodies, performing an important ecological function due to biologically active substances. This paper presents the results of the study of the volatile low molecular weight organic compounds of perennial higher aquatic vegetation of the following species: Potamogeton perfoliatus L., Potamogeton natans L., Equisetum fluviatile L. Plant material was collected from Lake Suuri, Leningrad region. Research has shown that these species are capable of synthesizing over 79 secondary metabolites. Secondary metabolites of macrophytes have an allelopathic effect on unicellular algae, which can be divided into suppressive and stimulating. Also in the course of the work, the dominant species of phytoplankton communities in plant associations, total biomass, abundance, biomass and abundance by divisions of algae were identified. The limnological characteristics of the reservoir in the places where higher aquatic plants grow are shown. The composition of low-molecular organic compounds of macrophytes was studied by gas chromatography-mass spectrometry. For a number of algal species, saprobity values have been established. In the investigated reservoir of the Leningrad region, more than 27 indicators of saprobity were revealed. It is shown that the indicator role of phytoplankton is determined not only by the presence or absence of certain species in the reservoir, but also by the degree of their quantitative development in the associations of higher aquatic plants. Specific biologically active volatile low-molecular-weight organic compounds have been identified, which can serve as an indicator of the state of the aquatic ecosystem under study. The regularity between the quantitative and qualitative composition of low-molecular organic substances of aquatic plants and the ecological situation of the habitat is shown.
Keywords: aquatic macrophytes, low-molecular-weight organic compounds, low-molecular-weight metabolic profiles, gas chromatography-mass spectrometry, anthropoge
Cite this article: Khodonovich V. V., Iavid E. Ia., Krylova Y. V., Kurashov E. A., Bakulina A. E.. ANALYSIS OF THE DEPENDENCE OF THE COMPOSITION OF THE METABOLOME OF HIGHER AQUATIC VEGETATION AND PHYTOPLANKTON ASSOCIATIONS TO ASSESS THE ECOLOGICAL STATE OF THE WATER ECOSYSTEM (LAKE SUURI). Journal of International Scientific Publications: Ecology & Safety 14, 122-128 (2020). https://www.scientific-publications.net/en/article/1002127/
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