A comparative analysis of the diversity, abundance, biomass, composition of dominant species, size characteristics of phytoplankton and saprobity of the waters of shallow large overgrown lakes Vozhe, Lacha, as well as the rivers Svid and Onega in June 2015 is presented. The data obtained are compared with the results of previous studies in the 1970s years. It was found that in the 2000s, there was a significant increase in the number of phytoplankton in lakes and a change in the composition of dominant species. Non-heterocyst cyanoprokaryotes (Aphanocapsa holsatica, Planktolyngbya limnetica) began to dominate in phytoplankton, which is associated with increase of ammonium concentration. The average biomass of phytoplankton in lakes (2.6 g/m3) has remained practically unchanged since the 1970s and was typical for mesotrophic type waters. In the Lacha Lake characterized by lower transparency, high degree of overgrowth, salinity and saprobity of waters, phytoplankton was distinguished by lower floristic diversity, higher abundance, dominance level, and the smallest cell sizes.
Vozhe and Lacha lakes, phytoplankton diversity, dominant species, abundance, biomass, saprobity, eutrophication
1. Vtoroy ocenochnyy doklad Rosgidrometa ob izmeneniyah klimata i ih posledstviyah na territorii Rossiyskoy Federacii. Obschee rezyume. M., Rosgidromet, 2014. 61 s.
2. Gidrobiologiya ozer Vozhe i Lacha (V svyazi s prognozom kachestva vod, perebrasyvaemyh na yug). L.: Nauka, 1978. 276 s.
3. Gidrologiya ozer Vozhe i Lacha. L.: Nauka, 1979. 288 s.
4. Kitaev S.P. Osnovy limnologii dlya gidrobiologov i ihtiologov. Petrozavodsk: Karel'skiy nauch. centr RAN, 2007. 394 s
5. Korneva L.G. Fitoplankton Rybinskogo vodohranilischa: sostav, osobennosti raspredeleniya, posledstviya evtrofirovaniya // Sovremennoe sostoyanie ekosistemy Rybinskogo vodohranilischa. Spb.: Gidrometeoizdat, 1993. S. 50–113.
6. Korneva L.G. Fitoplankton vodohranilisch basseyna Volgi. Kostroma: Kostromskoy pechatnyy dom, 2015. 284 s.
7. Kostyaev V.Ya. Biologiya i ekologiya azotfiksiruyuschih sinezelenyh vodorosley presnyh vod. L.: Nauka, 1986. 136 s.
8. Kuz'menko M.I. Miksotrofizm sinezelenyh vodorosley i ego ekologicheskoe znachenie. Kiev: Naukova Dumka, 1981. 212 s.
9. Makarenkova N.N. Sostav i dinamika dominiruyuschih grupp vodorosley v fitoplanktone krupnyh ozer vologodskoy oblasti v 2009–2014 gg. // Aktual'nye problemy biologii i ekologii. Mat. XXII Vseross. mol. konferencii. Syktyvkar: Komi nauchnyy centr UrO RAN, 2015. S. 31–35.
10. Makarenkova N.N. Sostoyanie fitoplanktona ozera Vozhe v vesenniy period 2014–2015 gg. // Rybohozyaystvennye issledovaniya na vnutrennih vodoemah. Mat. II Vseros. mol. Konf. Sankt-Peterburg, 2016. S. 214–219.
11. Metodika izucheniya biogeocenozov vnutrennih vodoemov. M.: Nauka, 1975. 239 s.
12. Miheeva T.M. Struktura i funkcionirovanie fitoplanktona pri evtrofirovanii vod. Avtoref. dicc. ... dokt. biol. nauk. Minsk, 1992. 63 s.
13. Ozera Lacha i Vozhe. Materialy kompleksnyh issledovaniy. L.: Nauka, 1975. 35 s.
14. Otchet o vypolnenii nauchno-issledovatel'skoy raboty na temu: Issledovanie sostoyaniya i razrabotka nauchno obosnovannyh rekomendaciy po vosstanovleniyu urovennogo rezhima vodnoy sistemy oz. Vozhe – r. Svid' – oz. Lacha. Borok, 2015. 236 s.
15. Rastopchinova E.S. Sravnitel'naya harakteristika sovremennogo sostoyaniya fitoplanktona melkovodnogo ozera Vozhe i ego pritokov: pervye rezul'taty // Biologicheskie resursy Belogo morya i vnutrennih vodoemov evropeyskogo Severa. Mat. IV (XXVII) mezhd. Konf. Vologda, 2005. S. 83–85.
16. Blomqvist P., Pettersson A., Hyenstrand P. Ammonium-nitrogen: A key regulatory factor causing dominance of non-nitrogen-fixing cyanobacteria in aquatic systems // Arch. Hydrobiol. 1994. Vol. 132. № 2. P. 141–164.
17. Coops H., Beklioglu M., Crisman T. The role of water-level fluctuations in shallow lake ecosystems – workshop conclusions // Hydrobiologia. 2003. Vol. 506–509. P. 23–27.
18. Gibson C.E., Foy R.H., Lennox S.D. The rise and rise Planktothrix agardhii in Lough Neagh 1969-1997 [27 Congress of the Inter. Ass. of Theor. and Appl. Limnol. Dublin, 1998] // Int. Ver. Theor. and angew. Limnol. 2001. Vol. 27. № 5. P. 2913–2916.
19. Havens K.E., Philips E.J., Cichra M.F., Li B.-L. Light availability as a possible regulator of cyanobacteria species composition in a shallow subtropical lake // Freshwater Biology. 1998. Vol. 39. № 3. P. 547–556.
20. Hindak F., Trifonova I.S. Morphology and ecology of three Limnothrix species (Cyanophyta) from the hypolimnion of highly eutrophic lake in Latvia, USSR // Biologia (Bratislava). 1989. № 1. P. 1–11.
21. Nõges P., Kägu M., Nõges T. Role of climate and agricultural practice in determining matter discharge into large, shallow Lake Võrtsjarv, Estonia // Hydrobiologia. 2007. Vol. 581. P. 125–134.
22. Reynolds C., Huszar V., Kruk C., Naselli-Flores L., Melo S. Towards a functional classification of the freshwater phytoplankton // J. Plankton Res. 2002. Vol. 24. P. 417–428.
23. Scheffer M., Rinaldi S., Gragnani A., Mur L.R., Van Nes E.H. On the dominance of filamentous Cyanobacteria in shallow, turbid lakes // Ecology. 1997. Vol. 78 (1). P. 272–282.
24. Sládeček V. System of Water Quality from the Biological Point of View // Arch. Hydrobiol. 1973. Beih. 7. Ergebnisse der Limnologie. H. 7. 218 s.
25. Wegl R. Index für die Limnosaprobität // Wasser und Abwasser. 1983. Band 26. 175 s.
