Phytoplankton structure and microcystine concentration in the highly eutrophic Nero Lake

Babanazarova, O. V.; Kurmayer, Rainer; Сиделев, С. И.; Aleksandrina, E. M.; Сахарова, Е. Г.

doi:10.1134/s0097807811020023

Cited by 19 publications

(9 citation statements)

References 12 publications

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“…Decreasing role of Aphanizomenon flos-aquae and species of the genus Anabaena was reported earlier (Lyashenko et al, 2002), but these algae made a significant contribution to biomass (up to 80%) during our studies. As it was observed in September 2001 (Lyashenko et al, 2002), during our studies, phytoplankton of the Lake Vashutinskoe was similar in composition of the dominant complex (genera Microcystis and Limnothrix) with other shallow eutrophic lakes, for example, the Lake Nero (Babanazarova et al, 2011).…”

Section: Algal Florasupporting

confidence: 87%

The current state and dynamics of the flora of several small lakes of the Yaroslavl Region, Russia

Belyakov¹,

Сахарова²,

Sokolova³

2020

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The phytoplankton and vascular aquatic plants have been studied in small lakes Vashutinskoe, Chashnitskoe, Ryumniki, and Zaozer’e, located in the southern part of the Yaroslavl Region, Russia. The taxonomic composition of phytoplankton comprised 137 species of algae belonging to 8 divisions, 18 orders, and 76 genera. The studied water bodies were characterized by high biomass of cyanobacteria. Aphanizomenon flos-aquae (L.) Ralfs ex Born et Flah. and the species of the genus Anabaena had a significant contribution to the phytoplankton biomass in the lakes Zaozer’e, Chashnitskoe, and Ryumniki, Limnothrix planctonica (Wołosz.) Meff. and Microcystis aeruginosa (Kütz.) Kütz, in the Lake Vashutinskoe. In terms of phytoplankton biomass, the pelagial and shallow areas of the Lake Vashutinskoe belonged to eutrophic reservoirs, of the Lake Ryumniki, to oligotrophic. The phytoplankton biomass in the pelagial zone of the lakes Chashnitskoe and Zaozer’e indicated the mesotrophic status of these water bodies, in the littoral zone, eutrophic. The study of the phytoplankton of the lakes was carried episodically and was often performed at different periods of the growing season. Therefore, the obtained data did not allow one to assess the direction of the successional changes in the algal flora. The flora of vascular plants of lakes was represented by 118 species belonging to 4 divisions, 5 classes, 22 orders, and 37 families. Thirty-four species were common to all studied water bodies. The differences in the The differences in the flora of vascular aquatic plantsof the studied lakes were associated with differences in their trophic status, the presence of various biotopes, the nature of anthropogenic load, and the degree of eutrophication. During a hundred years of observations, some species have disappeared, but some have appeared, including adventive species (such as Elodea canadensis Michx., Bidens frondosa L., Epilobium adenocaulon Hausskn, Zizania latifolia Griseb., and Juncus tenuis Willd.). The study of the current state of rare and protected species of vascular plants made it possible to reveal the eventual causes and period of disappearance of some species from the lakes. The taxonomic and ecological structure of phytoplankton and vascular plants of lakes was quite diverse and usual for the water bodies of the European part of Russia.

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Section: Algal Florasupporting

confidence: 87%

The current state and dynamics of the flora of several small lakes of the Yaroslavl Region, Russia

Belyakov¹,

Сахарова²,

Sokolova³

2020

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“…Lake Nero (latitude, 57°06’ to 57 °12’ N; longitude, 39 °21’ to 39° 30’ E) provides a good example of the contrasting seasonal extremes, allowing a detailed study of the link between summer algal communities and the under-ice biota. The lake has been intensely studied during the past few decades [ 20 - 22 ]. Lake Nero is a shallow, polymictic, slightly alkaline hypertrophic lake with low transparency and high TN/TP ratio, dominated typically by solitary, filamentous Cyanobacteria, from the beginning of summer to late autumn [ 20 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

“…The lake has been intensely studied during the past few decades [ 20 - 22 ]. Lake Nero is a shallow, polymictic, slightly alkaline hypertrophic lake with low transparency and high TN/TP ratio, dominated typically by solitary, filamentous Cyanobacteria, from the beginning of summer to late autumn [ 20 , 22 ]. Following the classical phytosociological nomenclature, Reynolds et al [ 23 ] term the preponderance of this group of filamentous Oscillatoriales as Planktotrichetum - S1 codon.…”

Section: Introductionmentioning

confidence: 99%

The structure of winter phytoplankton in Lake Nero, Russia, a hypertrophic lake dominated by Planktothrix-like Cyanobacteria

2013

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BackgroundThe permanent dominance of Planktothrix-like сyanobacteria has been often reported for shallow eutrophic\hypertrophic lakes in central Europe in summer\autumn. However studies on phytoplankton growth under ice cover in nutrient-rich lakes are very scarce. Lake Nero provides a good example of the contrasting seasonal extremes in environmental conditions. Moreover, the ecosystem underwent a catastrophic transition from eutrophic to hypertrophic 2003–05, with dominance of filamentous cyanobacteria in summer\autumn. Towards the end of the period of ice cover, there is an almost complete lack of light and oxygen but abundance in nutrients, especially ammonium nitrogen, soluble reactive phosphorus and total phosphorus in lake Nero. The aim of the present study was to describe species composition and abundance of the phytoplankton, in relation to the abiotic properties of the habitat to the end of winters 1999–2010. We were interested if Planktothrix-like сyanobacteria kept their dominant role under the ice conditions or only survived, and how did the under-ice phytoplankton community differ from year to year.ResultsSamples collected contained 172 algal taxa of sub-generic rank. Abundance of phytoplankton varied widely from very low to the bloom level. Cyanobacteria (Limnothrix, Pseudanabaena, Planktothrix) were present in all winter samples but did not always dominate. Favourable conditions included low winter temperature, thicker ice, almost complete lack of oxygen and high ammonium concentration. Flagellates belonging to Euglenophyta and Cryptophyta dominated in warmer winters, when phosphorus concentrations increased.ConclusionA full picture of algal succession in the lake may be obtained only if systematic winter observations are taken into account. Nearly anoxic conditions, severe light deficiency and high concentration of biogenic elements present a highly selective environment for phytoplankton. Hypertrophic water bodies of moderate zone covered by ice in winter and dominated by Planktothrix - like сyanobacteria in summer/autumn may follow several scenarios in the end of winter. It may be intense proliferation сyanobacteria normally dominating in summer, or the switch to the other species like the euglenoids and cryptomonads flagellates, or almost total depletion of phytoplankton.

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“…A number of studies analyze the ecosystems of urbanized water bodies both in Russia (Babanazarova et al, 2011;Mingazova et al, 2014;Okhapkin et al, 2003;Protisty..., 2009) and overseas (Anneville, 2002;Barinova et al, 2006;Birch and McCaskie, 1999;Kleeberg, 2003;Reynolds et al, 2002). However, despite the large amount of information available, the data on the current state and changes in the ecosystems of small water bodies of the urbanized landscape, especially in the zone of influence of large industrial centers, are still relevant.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of the fish population of the high floodplain lake of the Oka River basin by the example of the Lake Erus, Ryazan Oblast, Russia

Ivancheva¹,

Иванчев²,

Lychkovskaya³

2020

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The long-term dynamics of the fish population was studied in the forest lake of the high floodplain of the Oka River, located in the southeastern Meshchera Lowlands. The maximum ecological capacity of the lake is fifteen fish species and the minimum, three fish species. The dynamics of the composition and species structure of the fish community depends on a number of factors. The most significant factors are the physico-chemical characteristics of the lake, the level of spring floods, and the interactions between aboriginal and invasive species.

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Phytoplankton structure and microcystine concentration in the highly eutrophic Nero Lake

Cited by 19 publications

References 12 publications

The current state and dynamics of the flora of several small lakes of the Yaroslavl Region, Russia

The current state and dynamics of the flora of several small lakes of the Yaroslavl Region, Russia

The structure of winter phytoplankton in Lake Nero, Russia, a hypertrophic lake dominated by Planktothrix-like Cyanobacteria

Dynamics of the fish population of the high floodplain lake of the Oka River basin by the example of the Lake Erus, Ryazan Oblast, Russia

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