Epiphyton Algae Communities of the River Section of the Kanev Reservoir Depending on Ecological Factors

Tarashchuk, O. S.

doi:10.1615/hydrobj.v45.i6.30

Cited by 3 publications

(5 citation statements)

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“…Дослідження фітоепіфітону Канівського вдсх розпочалося дещо пізніше (Tarashchuk, 2009;Shevchenko, 2011;Klochenko, Shevchenko, 2017;Semenyuk, Shcherbak, 2016;Shcherbak et al, 2016;Semenyuk, 2018;Shevchenko et al, 2019).…”

Section: вступunclassified

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

Shcherbak,

Semeniuk,

Davydov

et al. 2023

Algologia

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The paper considers the present-day taxonomic and ecological diversity, spatial patterns of phytoplankton and algae on the interface of two phases: water – substratum (microphytobenthos and phytoepiphyton) in the most typical biotopes of Kaniv Reservoir in summer seasons of 2017–2022. 301 species (311 intraspecific taxa) of algae have been identified from 142 genera, 75 families, 44 orders, 15 classes and 8 phyla. At the phyla level Bacillariophyta, Chlorophyta and Cyanobacteria dominated. The highest number of species and infraspecific taxa – 143 (146) have been found in microphytobenthos. The highest diversity at the level of genera (98), families (57), orders (37), classes (11) and phyla (7) was observed for the phytoplankton. The phytoplankton was dominated by Chlorophyta and Bacillariophyta, the microphytobenthos and phytoepiphyton – by Bacillariophyta. The highest level of species similarity has been recorded between the algal communities at the interface of two phases: water – substratum, the highest dissimilarity – between phytoplankton and phytoepiphyton. According to geographic distribution cosmopolite species prevail, according to saprobity – χ-ο- and β-mesosaprobic organisms, according to salinity preferences – indifferent species, according to pH preferences – alcalifilic species. According to biotopic preference typically planktonic and eurytopic forms dominate the phytoplankton, and benthic and eurytopic forms dominate the microphytobenthos and phytoepiphyton. Comparing the present-day findings with the retrospective data has not shown any significant changes in the phytoplankton and the microphytobenthos structures. As before, Chlorophyta, Bacillariophyta and, to a lesser extent, Cyanobacteria continue to dominate in phytoplankton, and Bacillariophyta and Chlorophyta – in microphytobenthos. It is explained by natural internal processes prevailing in Kaniv Reservoir, relatively stable level of human impact, and constant algal flow from Kyiv Reservoirs and tributaries. Nowadays phytoplankton, microphytobenthos and phytoepiphyton are distinguished by high taxonomic diversity and play an important role in Kaniv Reservoir biodiversity.

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Section: вступunclassified

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

Shcherbak,

Semeniuk,

Davydov

et al. 2023

Algologia

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“…До зарегулювання Середнього Дніпра фітоепіфітон не досліджувався. Кількісні показники фітоепіфітону Канівського вдсх представлені в роботах : Tarashchuk, 2009;Klochenko, Shevchenko, 2017;Shevchenko et al, 2019. Результати ґрунтовних досліджень фітоепіфітону викладені в роботах Semeniuk, Shcherbak, 2016;Shcherbak et al, 2016. При всьому масиві даних щодо кількісного різноманіття водоростей відсутні результати комплексних робіт, виконаних одночасно для водоростей різних екологічних груп. Не виконувався й порівняльний аналіз кількісного розвитку та домінуючих комплексів фітопланктону, мікрофітобентосу, фітоепіфітону лотичних і лентичних біотопів.…”

Section: сучасна характеристика фітопланктонуunclassified

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

Shcherbak,

Semeniuk,

Davydov

et al. 2023

Algologia

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

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“…In the downstream of Kaniv hydroelectric the flow rate reaches 1.0-1.5 m/s [14]. It should be noted that for communities of phytoepiphyton is typical inverse relationship: when the flow rate increases the density, biomass and diversity of communities -are falling [3].…”

Section: Fig 3 the Relationship Between The Total Biomass Of Periphmentioning

confidence: 99%

“…Вступ. Після опису виду Crataegus ucrainica [2] та наведення його у флорі України у вигляді окремих особин, виявлених у природі й долучених до гербарних колекцій [3], і виходячи з екологічної й ценотичної специфіки виду та стабільності морфологічних ознак, цей вид був віднесений до списку видів, що мають міжнародний статус охорони [4].…”

Section: зміни зооперифітонових угрупувань у нижньому б'єфі канівськоunclassified

“…Although the channel sections in downstream of dams of hydroelectric power plants, transform not so dramatically, compared with sections of reservoirs upstream of hydroelectric power plants, but also undergo significant changes associated with unusual for river ecosystems daily fluctuations in water level and flow velocity and changes in the hydrological and thermal regime of rivers, ice regime and others [1]. River sections of Dnieper reservoirs studied, in particular, on the example of part of Kaniv reservoir within the city of Kyiv [2,3,4]. In this case, the impact of hydropower was combined with strong anthropogenic influence of the city.…”

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confidence: 99%

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Change of Zooperiphyton Communities by Downstream of Kaniv Hydroelectric Power Plant in Autumn Period

Borysenko

Lukashov

2017

BTSNUKSB

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Epiphyton Algae Communities of the River Section of the Kanev Reservoir Depending on Ecological Factors

Cited by 3 publications

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

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

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

Change of Zooperiphyton Communities by Downstream of Kaniv Hydroelectric Power Plant in Autumn Period

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