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Title: HYDROECOLOGICAL STATE OF THE SMALL UPLAND ARMENIAN LAKES
HYDROECOLOGICAL STATE OF THE SMALL UPLAND ARMENIAN LAKES

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Irina Fedorova; Larisa Ghazaryan; Vsevolod Rudakov; Elizaveta Chezhina; Grigorii Fedorov
10.5593/sgem2024/3.1/s12.13
10.5593/sgem2024/3.1
1314-2704
978-619-7603-70-5
English
24
3.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Hydrology and Water Resources
During summer-autumn 2023 hydrophysical, hydrochemical, and hydrobiological measurements had been done on six small upland Armenian lakes. For the first time colored dissolved organic matter (CDOM) and methane (CH4) – emission were observed.
Studied lakes are on 1479-3312 m a.s., has maximal depth up to 12 m with groundwater springs input. Anoxic conditions were noticed on the lake bottom in August but changed to oxygen in October. Conductivity range was 0-231 ?S cm-1, TDS - 3-102 mg l-1, pH – 6.4-9.4 for surfaces of all lakes. Main part of nutrients was silicates Si, phosphates PO4 and ammonium NH4. CH4 flux was quite high – reached 13 gCH4 m-2 d-1. Colored dissolved organic matter changes in 12 times range for the lakes, shows allochthonous and autochthonous source of organic matter, ecosystems have low ability to photo degradation.
Ecosystems of lakes depends on altitudes. Thus, pelagic zooplankton of Shushanalich (1552 m a.s.) presented Rotifera, Cladocera and Cyclopoida mostly, whereas Lessing lake (3312 m a.s.) had only Copepoda (Calanus sp.). Numerous diatoms were in plankton and sediments.
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The work is supported by the Ministry of Education, Science, Culture and Sports of Armenia (project – 23IRF-1E02). Authors thanks Resource Centres (Methods for the analysis of the composition of a substance and X-ray diffraction research methods) of St. Petersburg State University for hydrochemical and isotopic analyses of water samples and OSL in Arctic and Antarctic Research Institute for CDOM results. Individual thanks to G. Nigamatzyanova and L. Hambaryan for help in interpretation of zooplankton and diatom analysis results correspondingly.
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https://doi.org/10.5593/sgem2024/3.1/s12.13
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Proceedings of 24th International Multidisciplinary Scientific GeoConference SGEM 2024
24th International Multidisciplinary Scientific GeoConference SGEM 2024, 1 - 07 July, 2024
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
103-110
1 - 07 July, 2024
website
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alpine lakes, Armenia, ecosystems, hydrochemistry

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