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Green Tides: New Consequences of the Eutrophication of Natural Waters (Invited Review) / M. I. Gladyshev, Y. I. Gubelit // Contemp. Probl. Ecol. - 2019. - Vol. 12, Is. 2. - P109-125, DOI 10.1134/S1995425519020057. - Cited References:134. - This study was supported by a state task as part of fundamental research program of the Russian Federation no. VI. 51.1.9, no. 6.1504.2017/PCh, and no. AAAA-A19-119020690091-0. . - ISSN 1995-4255. - ISSN 1995-4263

РУБ Ecology
Рубрики:
CLADOPHORA-GLOMERATA CHLOROPHYTA
BENTHIC ALGAL COMMUNITY
MACROALGAL
Кл.слова (ненормированные):
nuisance algal blooms -- Ulva -- Cladophora -- Spirogyra -- metaphyton -- benthification
Аннотация: In recent decades, alongside the comparatively well-studied bloom caused by phytoplankton, a bloom of marine and fresh waters caused by littoral benthic macroalgae of three generaUlva, Cladophora, and Spirogyrahave become a global phenomenon. In the present review, an attempt is made to gain an understanding of why it is these taxa of green filamentous algae that start to grow rapidly in the spring in many water bodies and streams, including oligotrophic waters, and then float up from the bottom, forming floating mats (metaphyton); then their decaying masses are washed ashore and cause substantial ecological and economical losses. Peculiar and common ecological and physiological features of Ulva, Cladophora, and Spirogyra favorable for the formation of green tides are considered. Although eutrophication (the supply of nitrogen and phosphorus from agricultural lands, industrial and domestic wastewaters, and aquaculture) is the evident cause of the increase in algal biomass, it is suggested that the location of external fluxes of inorganic nutrients (surface runoff or groundwater discharge), as well as the biogenic redirection of internal fluxes of nitrogen and phosphorus from pelagial to littoral (benthification), play a key role in the formation of green tides. Measures for controlling green tides are discussed. The necessity for detailed studies of the metaphytonic form of vegetation of benthic macroalgae is emphasized. Obviously, a revision of the present concept of oligotrophic/eutrophic waters which considers only the pelagic compartments of aquatic ecosystems is required.

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Scopus
Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Krasnoyarsk Sci Ctr, Siberian Branch, Inst Biophys, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Zool Inst, St Petersburg 199034, Russia.

Доп.точки доступа:
Gladyshev, M. I.; Gubelit, Y. I.; state task as part of fundamental research program of the Russian Federation [51.1.9, 6.1504.2017/PCh, AAAA-A19-119020690091-0]

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Isotope Composition of Nitrogen and Stoichiometric Ratios of Elements in Biomass of Spirogyra in Lake Baikal / M. I. Gladyshev, L. A. Glushchenko, E. S. Kravchuk [et al.] // Doklad. Biochem. Biophys. - 2020. - Vol. 491, Is. 1. - P70-72, DOI 10.1134/S1607672920020088 . - ISSN 1607-6729
Кл.слова (ненормированные):
C:N:P stoichiometry -- inorganic nutrients -- “green tide,” green filamentous algae
Аннотация: Abstract: Using stable isotope analysis of nitrogen, for the first time the hypothesis on different sources of inorganic nutrients for two groups of littoral algae in Lake Baikal was confirmed. Strongly attached filamentous algae of genus Ulothrix, which developed in the wave-braking zone at depth 0.5 m, and loosely attached filamentous algae of genus Spirogyra, which developed in deeper layers 3.0–5.0 m in a low-turbulence zone, get inorganic nutrients presumably from surface discharge and groundwater inputs, respectively. Besides, stoichiometric ratios C:N and N:P in biomass of the algae indicated that growth of Spirogyra in Lake Baikal was likely limited by nitrogen, while growth of Ulothrix was limited by phosphorus. © 2020, Pleiades Publishing, Ltd.

Scopus
Держатели документа:
Institute of Biophysics, Krasnoyarsk Scientific Center of the Russian Academy of Sciences, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Moscow State University, Moscow, 119991, Russian Federation

Доп.точки доступа:
Gladyshev, M. I.; Glushchenko, L. A.; Kravchuk, E. S.; Anishchenko, O. V.; Kolmakova, A. A.; Kolobov, M. Y.; Razgoniaeva, V. A.; Sushchik, N. N.

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Phytoplankton and Phytoperiphyton Characteristics of Lake Pyasino and Its Tributaries after an Accidental Fuel Spill in 2020 / E. S. Kravchuk, A. V. Kotovshchikov, E. A. Ivanova // Contemp. Probl. Ecol. - 2021. - Vol. 14, Is. 4. - P368-379, DOI 10.1134/S1995425521040065. - Cited References:30. - The study was supported by economic agreement no. 223-EP-2020/07 with the Siberian Branch of the Russian Academy of Sciences. . - ISSN 1995-4255. - ISSN 1995-4263

РУБ Ecology
Рубрики:
OIL-SPILLS
Кл.слова (ненормированные):
fuel pollution -- freshwater ecosystems -- phytoplankton -- phytoperiphyton -- photosynthetic pigments -- Lake Pyasino -- Ambarnaya River
Аннотация: An assessment of the species composition, abundance, biomass, and pigment characteristics of phytoperiphyton and phytoplankton of Lake Pyasino, its tributaries (Bezymyannyi Stream, Daldykan, Ambarnaya, and Norilskaya rivers), and the head of the Pyasina River has been carried out after a manmade accident (a diesel-fuel spill near the city of Norilsk in May 2020). A significant decline in the biomass and changes in the species composition of phytoperiphyton after the water was contaminated by fuel is revealed only near the spillage site (in the Daldykan River and the Ambarnaya River downstream the mouth of the Daldykan). Downstream, in the Ambarnaya mouth zone, as a response to the release of a large amount of nutrients during the decomposition of fuel products and dead organisms, as well as the mechanical cleaning of the bank line, there has been a massive growth of diatom and green algae (Tabularia tabulata, Spirogyra sp.) in the water column and the appearance of indicators of organic pollution (Euglenophyceae and Cryptophyceae). No significant changes in the plankton of Lake Pyasino and the Pyasina River in comparison with the data obtained in the second half of the 20th century (i.e., long before the accident) are found. Species composition and quantitative features, as well as amount and ratio of pigments, characterized the phytoplankton and phytoperiphyton of Lake Pyasino and the Pyasina River as a normally functioning freshwater community of oligotrophic waters. All this indicates the absence of a negative impact of the accidental fuel spill on the ecosystem of Lake Pyasino and the Pyasina River.

WOS
Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Inst Biophys,Fed Res Ctr, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Siberian Branch, Inst Water & Environm Problems, Barnaul 656038, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Kravchuk, E. S.; Kotovshchikov, A. V.; Ivanova, E. A.; Siberian Branch of the Russian Academy of SciencesRussian Academy of Sciences [223-EP-2020/07]

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