Cited by Characteristics of phytoplankton functioning in urban water reservoires (based on the example of Basivkut Reservoir, Ukraine)

Dynamics of local phytoplankton communities in the upper-cascade Dnieper reservoirs under present conditions DOI

N.Ye. Semeniuk, V. I. Shcherbak, O. A. Davydov

et al.

Algologia, Journal Year: 2025, Volume and Issue: 35(1), P. 30 - 57

Published: March 4, 2025

Important factors, affecting the spatial and temporal dynamics structure of local phytoplankton communities in upper-cascade Dnieper reservoirs include global climate change manifesting abnormally high water temperatures unsteady mode HPP operation, which is registered or low level reservoirs. A strong positive correlation has been found between temperature Cyanobacteria Chlorophyta biomass inverse for Bacillariophyta. Two groups algae have distinguished, prevailing under different temperatures: 1) Bacillariophyta—Chlorophyta, when close to climatic norm; 2) Cyanobacteria—Chlorophyta, high. Besides, reduction cell size observed at cenotic level. The findings comparative analysis retrospective present data show an increase during recent decades. High count are recorded lower part Kyiv reservoir distinguished by large shallow-water areas, quickly get warm, upper Kaniv reservoir, where discharge. This phenomenon can be considered as mass effect – presence species untypical localities due speed dispersal from other localities. responded abnormal fluctuations Sorensen similarity indices levels, compared with normal When high, migration among becomes more intense, observed. During some algal benthos periphyton migrate phytoplankton. level, distance decay slows down, also regarded a manifestation effect.

Language: Английский

Citations

Is Everything Lost? Recreating the Surface Water Temperature of Unmonitored Lakes in Poland DOI

Mariusz Ptak, Mariusz Sojka, Katarzyna Szyga–Pluta

et al.

Resources, Journal Year: 2025, Volume and Issue: 14(4), P. 67 - 67

Published: April 18, 2025

One of the fundamental features lakes is water temperature, which determines functioning lake ecosystems. However, overall range information related to monitoring this parameter quite limited, both in terms number and duration measurements. This study addresses gap by reconstructing surface temperature (LSWT) six Poland from 1994 2023, where direct measurements were discontinued. The reconstruction based on Air2Water model, establishes a statistical relationship between LSWT air temperature. Model validation using historical observations demonstrated high predictive accuracy, with Nash–Sutcliffe Efficiency exceeding 0.92 root mean squared error ranging 0.97 °C 2.13 across lakes. A trend analysis Mann–Kendall test Sen’s slope estimator indicated statistically significant warming all lakes, an average increase 0.35 per decade. Monthly trends most pronounced June, September, November, 0.50 decade some cases. direction, pace, scale these changes are crucial for managing individual ecological economic perspective.

Language: Английский

Citations

Phytoplankton Characteristics in Various Ecosystems of the Dnieper River: Quantitative Indices, Dominant Complex, Response of Algae to the Influence of Certain Ecological Factors, and Water Quality DOI

V. I. Shcherbak,

N. Ye. Semenyuk,

P.S. Kutishchev

et al.

Hydrobiological Journal, Journal Year: 2025, Volume and Issue: 61(3), P. 3 - 29

Published: Jan. 1, 2025

In summertime, phytoplankton of the Kyiv Reservoir and Dnieper River estuary was characterized by high cell numbers biomass typical to highly trophic water bodies. At same time, in (in particular those Cyanobacteria) were almost one order magnitude higher than registered reservoir, which is likely conditioned a warmer climate region. Not only temperature, but also hydrological hydrochemical factors influenced long-term dynamics Cyanobacteria Reservoir. estuary, development mainly temperature regime. The increase mineralization results spread brackish-water marine species algae. this case, intensity process essentially that reservoir. Water quality both reservoir as «moderately contaminated waters», many lotic lentic ecosystems Ukraine European Union. obtained data can be used background for further assessment negative consequences military actions Russian Federation Ukraine.

Language: Английский

Citations

Characteristics of Cyanobacteria at Different Stages of Existence of the Kyiv Reservoir DOI

V. I. Shcherbak,

N. Ye. Semenyuk,

N. V. Maystrova

et al.

Hydrobiological Journal, Journal Year: 2023, Volume and Issue: 60(1), P. 3 - 27

Published: Dec. 8, 2023

The paper deals with the patterns of Cyanobacteria long-term succession at different stages existence Kyiv Reservoir. main ecological factors responsible for include current velocity, hydromorphological characteristics reservoir, content inorganic nitrogen (primarily ammonium) and phosphorus, ΣN : P ratio, global climate changes, competition higher aquatic plants in shallow water zone. trophic state hydroecosystem changed from mesotrophic (at stage non-regulated river) to eutrophic present time) depending on intensity development. With possible further deterioration quality, changes an increase temperature within range even 1-2°C, development will increase, especially pelagic zone where they have practically no natural biological competitors.

Language: Английский

Citations

Present-day characteristics of phytoplankton, microphytobenthos and phytoepiphyton of the Kaniv Reservoir DOI

V. I. Shcherbak, N.Ye. Semeniuk, O. A. Davydov

et al.

Algologia, Journal Year: 2023, Volume and Issue: 33(4), P. 247 - 277

Published: Dec. 15, 2023

The paper studies quantitative diversity and dominant complexes of phytoplankton, microphytobenthos phytoepiphyton in lotic lentic biotopes within the Kaniv Reservoir summer seasons 2017–2022, considers their association with some abiotic variables, assesses trophic state, information according to Shannon’s index water quality. cell count planktonic algae varied 2780–124155 thous. cells · dm–3, biomass – 0.631–11.636 mg benthic 390–13874 10 cm–2 0.162–2.651 cm–2, epiphytic 50–680 0.050–1.679 respectively. In phytoplankton was higher than due algal inflow from Kyiv tributaries. structural organization is represented by oligodominant Cyanobacteria Bacillariophyta respectively, monodominant complex Bacillariophyta. necessity distinguish has been proven. communities clearly divide into three clusters (for plankton, benthos epiphyton), each them two biotopes). Sorensen similarity between phytoepiphyton, which can be explained sedimentation forms on bottom under different ecological conditions. High biomass, diverse depend upon variables (solar radiation, photic layer thickness, temperature summer, nutrient content). According state assessed as eutrophic–polytrophic, contour oligo-mesotrophic–mesotrophic. This difference complies “alternative stable states” theory. That is, reservoir “turbid state”, when grow intensively, screen surface suppress photosynthesis communities. quality 1st–3rd classes (clean–satisfactory clean waters), there are no point diffuse sources pollution, mainly coincides retrospective data.

Language: Английский

Citations

Phytoplankton Characteristics in Various Ecosystems of the Dnieper River: Abiotic Factors and Phytoplankton Taxonomic Diversity DOI

V. I. Shcherbak, N.Ye. Semeniuk,

P.S. Kutishchev

et al.

Hydrobiological Journal, Journal Year: 2024, Volume and Issue: 60(4), P. 3 - 23

Published: Jan. 1, 2024

The paper deals with comparative analysis of the main abiotic factors and phytoplankton taxonomic characteristics in various ecosystems Dnieper River, including head cascade Kyiv Reservoir natural estuary. Investigations were carried out summer seasons 2014-2020. studied water bodies differ significantly their physical, geographic, climatic, hydrological, hydrochemical characteristics. However, they have some common features: both are large highly productive lentic similar morphometric parameters. As regards diversity, similarities include same rank distribution leading divisions high species richness phytoplankton. A number differences has also been observed: a higher share Bacillariophyta reservoir shares Cyanobacteria Miozoa estuary; estuary compared to Reservoir; species, occurring only one - 75 88 obtained data can serve as background for assessing an adverse effect Russia's military aggression arising hazards Ukraine.

Language: Английский

Citations

Characteristics of Phytoplankton Functioning in Urban Water Reservoirs (Based on the Example of Basivkut Reservoir, Ukraine) DOI

I. Sukhodolska, В. В. Грубінко, B. P. Masovets

et al.

International Journal on Algae, Journal Year: 2024, Volume and Issue: 26(3), P. 261 - 272

Published: Jan. 1, 2024

This study states fundamental patterns of development for species and taxonomic composition, structure seasonal population dynamics, biomass informational diversity phytoplankton in the Basivkut water store. Over course this research (June-October, 2022), we-identified 121 algae represented with 125 intraspecific taxa that belong to 84 genera, 45 families, 29 orders, 12 classes 8 divisions. Floristic aspect plankton is presented Chlorophyta (40.1% total number), Bacillariophyta (26.4% ), Euglenozoa (13.2% ) Cyanobacteria (12.4% ). The store ranged from 4654 thousand cells/dm3 14212 (August), 0.8732 mg/dm3 (July) 9.4828 (October). Shannon index fluctuated between 0.62-5.07 bit/mg according biomass, or 2.13-4.50 bit/sp. population. average values saprobic 1.74 2.14, corresponding third class quality (poorly polluted). author highlights increasing Cyanobacteria development, whose reached 86.1% 33.2% causing intensive algal blooms all summer months impact groups, on anthropogenic factors effect climate changes. Aphanizomenon flos-aquae (10.5-32.2% 10.6-12.4% Cuspidothrix issatschenkoi (11.6-31.2% 10.2-14.5% have dominated their biomass. impacted (39.5-74.0% (88.7-98.4% autumn. Small cell type Stephanodiscus hantzschii has been characterized significant (16.9-65.4% (51.1-92.9% increase storage.

Language: Английский

Citations

Plankton and contour algal communities in the Ukrainian section of the Western Bug River and its tributaries DOI

V. I. Shcherbak, N.Ye. Semeniuk, O. A. Davydov

et al.

Algologia, Journal Year: 2024, Volume and Issue: 34(3), P. 175 - 204

Published: Sept. 9, 2024

The paper deals with spatial dynamics of cell count, biomass, dominant species complexes, information diversity planktonic and contour algal communities in the Western Bug River its tributaries. trophic state water quality rivers under study have been assessed. heterogeneity phytoplankton, microphytobenthos phytoperiphyton brought about high count biomass values during low-water summer-autumn season. shown to increase from upper reaches downstream, correlating river bed width. High quantitative was due Bacillariophyta dominance. Cyanobacteria Chlorophyta were recorded as subdominants. aquatic ecosystems varied between oligotrophic eutrophic. Shannon’s index made up 1.58–4.62 bit/cell 1.60–4.40 bit/mg. assessed according higher than phytoplankton. This is indicative clear regime forming obtained findings differ data, published earlier for Kaniv Water Reservoir, where primary role belonged related complexes structure. As a rule, these are monodominant or oligodominant – complexes. assessment abiotic variables saprobiologic characteristics has that modal classes 2nd–3rd (clean waters satisfactory clean waters). Therefore, Ukrainian section tributaries does not pose any substantial hazard adjacent European countries.

Language: Английский

Citations

Taxonomic composition of phytoplankton in various continental aquatic hydroecosystems of Ukraine DOI

O. A. Davydov, V. I. Shcherbak, N.Ye. Semeniuk

et al.

Algologia, Journal Year: 2024, Volume and Issue: 34(4), P. 273 - 293

Published: Nov. 30, 2024

The paper deals with present-day taxonomic composition of phytoplankton in various continental aquatic ecosystems Ukraine (Kaniv Reservoir, the Western Bug River (with tributaries), Prypiat Sula (within Nyzhniosulskyi National Natural Park, ponds (Hostomel town), large lakes Danube River) according to modern algological nomenclature AlgaeBase. Within 2000–2022 under study 455 species algae were identified, represented by 467 infraspecies taxa from 206 genera, 102 families, 53 orders, 18 classes and 8 phyla. most diverse Bacillariophyta (25–50%), Chlorophyta (22–39%) Cyanobacteria (7–16% floristic spectrum). Phytoplankton responds present climate change increase share. hierarchy algae, identified plankton, is characterized following regression: > Ochrophyta Euglenozoa. Analysis at different levels their systematic (families, genera — Kendall index; (infraspecie taxa) Sørensen index) has made it possible reveal patterns. index for leading families varied within 0.31–0.72. highest level similarity was observed lotic ecosystems. between 0.11 0.59. one type, example, (the or lentic (ponds Hostomel town lakes). Cluster analysis shows that two clusters can be distinguished dendrogram: long-term data on (algae water column moment sampling) give evidence high diversity thereof Ukraine.

Language: Английский

Citations

Characteristics of phytoplankton functioning in urban water reservoires (based on the example of Basivkut Reservoir, Ukraine) DOI

I. Sukhodolska, В. В. Грубінко, B. P. Masovets

et al.

Algologia, Journal Year: 2023, Volume and Issue: 33(4), P. 278 - 291

Published: Dec. 15, 2023

The study states fundamental patterns of development for species and taxonomic composition, structure seasonal population dynamics, biomass informational diversity phytoplankton in Basivkut Reservoir. During the research (June–October, 2022) it has been identified 121 algae represented with 125 intraspecific taxa that belong to 84 genera, 43 families, 29 orders, 12 classes 8 divisions. Floristic aspect plankton is presented Chlorophyta (40.1% total number), Bacillariophyta (26.4%), Euglenozoa (13.2%) Cyanobacteria (12.4%). water storage was ranging from 4654 thous. cells/dm3 14212 (August), changing 0.8732 mg/dm3 (July) 9.4828 (October). Shannon index changed within 0.62–5.07 bit/mg according biomass, 2.13–4.50 bit/sp. population. average values saprobic have ranged 1.74 2.14 correspond third class quality (poorly polluted). author highlights increasing whose reached 86.1% 33.2% caused intensive algal blooms all summer months impact groups on anthropogenic factors effect climate changes. Aphanizomenon flos-aquae (10.5–32.2% 10.6–12.4%) Cuspidothrix issatschenkoi (11.6–31.2% 10.2–14.5%) dominated their biomass. impacted (39.5–74.0%) (88.7–98.4%) autumn. Small cell type Stephanodiscus hantzschii characterized significant (16.9–65.4%) (51.1–92.9%) focuses degree trophic level storage.

Language: Английский

Citations