Chlorophyll and Its Role in Freshwater Ecosystem on the Example of the Volga River Reservoirs

Mineeva, Natalya

doi:10.5772/intechopen.105424

Cited by 10 publications

(5 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The data obtained in August are confined to the maximum warming of the water column and correspond to the summer maximum of phytoplankton, which is indicative for assessing the state of water bodies. Concentrations of chlorophyll (ΣCHL) in each reservoir were typical for this particular period of phytoplankton seasonal succession [10].…”

Section: Discussionmentioning

confidence: 98%

“…These features determine the uneven large-scale distribution of phytoplankton and, as a result, the significant difference between the maximum and minimum chlorophyll concentrations in each reservoir (Table 2). An increased amount of chlorophyll is usually observed in shallow water areas, in the mouth sections of tributaries, and in dam extensions [10]. Differences in weather conditions influenced the quantitative development of phytoplankton and changes in ∑CHL in the years of study.…”

Section: Discussionmentioning

confidence: 98%

“…Phytoplankton form the basis of the trophic pyramid in the largest river in Europe, the Volga River, which has now been transformed into a cascade of reservoirs [7,8]. Research of the pigments in the Volga River was started in the middle of the XX century [9], and these studies have been supplemented with new data [10][11][12], which are summarized in [13]. Most of these studies were carried out with the standard spectrophotometric method [14].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Chlorophyll Content and Photosynthetic Activity of Phytoplankton in Reservoirs of the Volga River (Russia)

Минеева

Semadeni

2023

Phycology

View full text Add to dashboard Cite

Using the fluorescent method in the modification of Krasnoyarsk State University, we studied the development (as chlorophyll content, ∑CHL) and photosynthetic activity of phytoplankton in seven large flat reservoirs of the Volga River cascade (Russia) in August 2015–2017. In the period of the maximal warming of water, average ∑CHL varied in limits of 19.4–33.7 μg L−1 in the Upper Volga, 8.5–27.8 μg L−1 in the Middle Volga, and 5.2–11.3 μg L−1 in the Lower Volga. The photosynthetic activity coefficient (PhAC) varied mostly in limits of 0.12–0.59, with an average of 0.22–0.38 and only in 2017 decreased to minimal < 0.10 and average < 0.20. The average PhAC values show the normal physiological state of the phytoplankton of the Upper Volga during all periods of observation, with an occasional decrease in PhAC in the Middle Volga and low photosynthetic activity in the Lower Volga. A decrease in the average ∑Chl and PhAC in 2017 was under cyclonic windy weather with a large amount of precipitation, low solar radiation, and large volume of flow. A trend towards a decrease in ∑CHL, like a decrease in PhAC from the Upper Volga to the Lower Volga, is explained by an increase in the flow rate and volume of runoff downstream of the Volga River.

show abstract

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Chlorophyll Content and Photosynthetic Activity of Phytoplankton in Reservoirs of the Volga River (Russia)

Минеева

Semadeni

2023

Phycology

View full text Add to dashboard Cite

show abstract

“…In the aquatic environment, the pigments can be degraded in response to chemical, photochemical and biological processes (Kuczynska et al, 2015). Chlorophylls depend on the phosphorus concentration in the water, which is necessary for algal growth (Mineeva, 2022), on the oxygen content, pH and nitrate (Dar et al, 2013;Horvatić et al, 2013). Specifically, these authors stated that the concentration of chlorophyll increases when the nutrients in the water are increased and that the amount of chlorophyll in the water is usually high in summer and low in winter, so monitoring chlorophyll at different times of the year is essential.…”

Section: Spatiotemporal Monitoring Of Water and Soil In Almyros Karst...mentioning

confidence: 99%

Spatiotemporal environmental monitoring of the karst-related Almyros Wetland (Heraklion, Crete, Greece, Eastern Mediterranean)

Kokinou,

Zacharioudaki,

Kokolakis

et al. 2023

Environ Monit Assess

View full text Add to dashboard Cite

Wetlands are of great importance for providing the appropriate conditions for the diversity of species and inhabitants living in these ecosystems and for a wide range of public goods and services (fresh water, air filtering, recreational and tourism opportunities). However, despite their importance, wetlands are continuously degraded due to various human activities at an alarming rate worldwide. In the context of this study and considering the rational management of wetlands and the inevitable impact of climate change, a wetland, spatiotemporal monitoring system is proposed, implemented in the karst wetland of Almyros Stream (Heraklion, Crete, Greece). The implementation of this system is based on robust techniques from the allied fields of chemistry, earth and ecology assisted by GIS techniques. Our results indicate that this Mediterranean karst wetland of great ecological importance is under pressure because of pollution, climate change and land change. This argument is supported by (a) the high concentrations of water photosynthetic pigments and nutrients at certain times of the year, both provided by chemical analysis and partially verified by geophysical monitoring (spectral induced polarization) and (b) the high values of soil magnetic susceptibility at sites close to human infrastructures that is an indicator of heavy metals concentrations.

show abstract

Section: Introductionmentioning

confidence: 99%

Chlorophyll Content and Photosynthetic Activity of Phytoplankton in Reservoirs of the Volga River (Russia)

Минеева¹,

Semadeni²

2023

Preprint

View full text Add to dashboard Cite

Using the fluorescent method in the modification of Krasnoyarsk State University, we study development (as chlorophyll content, ∑CHL) and photosynthetic activity of phytoplankton in seven large flat reservoir of the Volga River cascade (Russia) in August 2915–2017. In period of maximal warming of water, average ∑CHL varied in limits of 19.4–33.7 μg L–1 in the Upper Volga, 8.5–27.8 μg L–1 in the Middle Volga, and 5.2–11.3 μg L–1 in the Lower Volga. Photosynthetic activity coefficient (PhAC) varied mostly in limits of 0.12–0.59 with average of 0.22–0.38 and only in 2017 decreased to minimal <0.10 and average <0.20. The average PhAC values shows the normal physiological state of the phytoplankton of the Upper Volga during all periods of observation, occasional decrease of PhAC in the Middle Volga, and low photosynthetic activity in the Lower Volga. A decrease in the average ∑Chl and PhAC in 2017 was under cyclonic windy weather with a large amount of precipitation, low solar radiation, and large volume of flow. Trend towards a decrease in ∑CHL, like decrease in PhAC from the Upper Volga to the Lower Volga is explained by increasing in the flow rate and volume of runoff downstream the Volga River.

show abstract

Chlorophyll and Its Role in Freshwater Ecosystem on the Example of the Volga River Reservoirs

Cited by 10 publications

References 47 publications

Chlorophyll Content and Photosynthetic Activity of Phytoplankton in Reservoirs of the Volga River (Russia)

Chlorophyll Content and Photosynthetic Activity of Phytoplankton in Reservoirs of the Volga River (Russia)

Spatiotemporal environmental monitoring of the karst-related Almyros Wetland (Heraklion, Crete, Greece, Eastern Mediterranean)

Chlorophyll Content and Photosynthetic Activity of Phytoplankton in Reservoirs of the Volga River (Russia)

Contact Info

Product

Resources

About