Weather conditions influencing phosphorus concentration in the growing period in the large shallow Lake Peipsi (Estonia/Russia)

Tammeorg, Olga; Möls, Tõnu; Kangur, Külli

doi:10.4081/jlimnol.2014.768

Cited by 10 publications

(8 citation statements)

References 41 publications

(49 reference statements)

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“…Furthermore, several species of cyanobacteria are able to uptake and store bioavailable phosphorus, and thus the populations can sustain themselves on internal P storage [52]. Changes in the factors that regulate cyanobacteria abundance between early and late times of the growing season reported in the current study are most likely related to the changes in the relative importance of the sources of nutrient supply, as they are closely coupled to the seasonality of nutrient dynamics in Lake Peipsi [61,62]. Moreover, different cyanobacteria species may assimilate nutrients at different rates.…”

Section: Discussionmentioning

confidence: 68%

Using Microcystin Gene Copies to Determine Potentially-Toxic Blooms, Example from a Shallow Eutrophic Lake Peipsi

Panksep

Tamm

Mantzouki

et al. 2020

Toxins

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Global warming, paired with eutrophication processes, is shifting phytoplankton communities towards the dominance of bloom-forming and potentially toxic cyanobacteria. The ecosystems of shallow lakes are especially vulnerable to these changes. Traditional monitoring via microscopy is not able to quantify the dynamics of toxin-producing cyanobacteria on a proper spatio-temporal scale. Molecular tools are highly sensitive and can be useful as an early warning tool for lake managers. We quantified the potential microcystin (MC) producers in Lake Peipsi using microscopy and quantitative polymerase chain reaction (qPCR) and analysed the relationship between the abundance of the mcyE genes, MC concentration, MC variants and toxin quota per mcyE gene. We also linked environmental factors to the cyanobacteria community composition. In Lake Peipsi, we found rather moderate MC concentrations, but microcystins and microcystin-producing cyanobacteria were widespread across the lake. Nitrate (NO3−) was a main driver behind the cyanobacterial community at the beginning of the growing season, while in late summer it was primarily associated with the soluble reactive phosphorus (SRP) concentration. A positive relationship was found between the MC quota per mcyE gene and water temperature. The most abundant variant—MC-RR—was associated with MC quota per mcyE gene, while other MC variants did not show any significant impact.

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Section: Discussionmentioning

confidence: 68%

Using Microcystin Gene Copies to Determine Potentially-Toxic Blooms, Example from a Shallow Eutrophic Lake Peipsi

Panksep

Tamm

Mantzouki

et al. 2020

Toxins

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“…TP showed a decreasing trend in two (August, October) of the three months in a three-month-data in Lake Peipsi s.s. that determined the overall trend in years 2001–2019. As in other shallow lakes (e.g., Søndergaard et al, 2003 , Nürnberg, 2009 ), increases in TP approaching autumn are explained by P release from sediments in Lake Peipsi (internal P load; Tammeorg et al, 2014 ). Earlier studies demonstrated that internal P load in Lake Peipsi correlates positively with water temperature in August and water level in months from August to October ( Tammeorg et al, 2020 ).…”

Section: Discussionmentioning

confidence: 70%

Opportunities for combining data of Estonian and Russian monitoring to reflect on water quality in large transboundary Lake Peipsi

Tammeorg

Tuvikene

Kondratyev

et al. 2022

Journal of Great Lakes Research

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“…Выявлено влияние на концентрацию азота прибрежной растительности (Canham et al, 2012). На концентрацию общего фосфора в воде заметно влияют температура и уровень воды в озере, фотосинтетическая активность водных растений, ветер (Tammeorg et al, 2014).…”

Section: материал и методы исследованийunclassified

Long-term dynamics of hydrological and hydro-chemical indicators of Kytai Lake (Odessa region, Ukraine)

Джуртубаев

Urbanskaya²,

Dzhurtubaev

2016

Biosys. divers.

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Odessa region contains a unique natural complex – the Danube lakes. One of the largest is Kytai Lake. After their construction in the second half of the XX century, dams have drastically changed the ecological situation in the lakes, including hydrological and hydro-chemical parameters. 120 water samples were taken from the lake in the years 2004–2013. 1,390 measurements were taken according to 11 indicators. Our research also used historical data for 2004–2005. Studies have shown that the hydrological and hydrochemical situation in Kytai Lake deteriorated in the period 2004 to 2013. There was a marked decrease in the water transparency and a steady increase in the amount of suspended matter in the water (from 29.4 mg/dm³ in 2006 to 143.2 mg/dm³ in 2012). The salinity of the water greatly increased (up to 6200 mg/ dm³ in September – November 2012). Permanganate oxidization permanently and significantly exceeeds the maximum permissible value of BOD5. The amount of dissolved oxygen, total nitrogen, phosphorus, nitrates and pH conform to the permitted norm, although the situation with these indicators has also gradually worsened. The average annual temperature of the water was 11.4–15.8 °C, which corresponds to the temperature regime of the continental waters in the region. To improve the ecological situation in the lake, it is necessary to ensure that the pumping station supplies a stable inflow of water from the Danube, which would significantly lower the excessive salinity of the lake.

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Weather conditions influencing phosphorus concentration in the growing period in the large shallow Lake Peipsi (Estonia/Russia)

Abstract: The impact of water temperature (T), water level (L), photosynthetically active radiation (PAR), and wind speed (V) on the total phosphorus concentration (TP) in shallow eutrophic Lake Peipsi, the fourth largest lake in Europe, was studied. We used a long-term dataset

Cited by 10 publications

References 41 publications

Using Microcystin Gene Copies to Determine Potentially-Toxic Blooms, Example from a Shallow Eutrophic Lake Peipsi

Using Microcystin Gene Copies to Determine Potentially-Toxic Blooms, Example from a Shallow Eutrophic Lake Peipsi

Opportunities for combining data of Estonian and Russian monitoring to reflect on water quality in large transboundary Lake Peipsi

Long-term dynamics of hydrological and hydro-chemical indicators of Kytai Lake (Odessa region, Ukraine)

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