Ecological and Morphological Structure of Microphytobenthos

Oksiyuk, O. P.; Davydov, O. A.; Karpezo, Yu. I.

doi:10.1615/hydrobj.v45.i2.20

Cited by 8 publications

(4 citation statements)

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“…У мікрофітобентосі автохтонні компоненти та індикаторна еколого-морфологічна група бентонтів виділені з урахуванням характеристик приуроченості водоростей до певних біотопів [1,4,7,14,15,16,17,19].…”

Section: матеріал і методи дослідженьunclassified

Мікрофітобентос Як Біоіндикатор Зміни Гідроморфометричних Параметрів Водного Об’єкту Міста Києва

Davydov

Larionova

2020

TernopilBioSciIssues

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A great number of water bodies within urban areas of Kyiv City are exposed to human impact. Hydrotechnical construction operations alter their morphometric and hydrological parameters, water bodies are contaminated with various inorganic and organic substances etc. Since human impact upon water bodies has diversified, bioindication is a well-established and effective method of assessing water bodies’ ecological status and measuring the rate of their ecosystems’ disturbance. Microphytobenthos is an important element of aquatic ecosystems and is widely used as a reliable biological indicator. While using microphytobenthos as an ecological community, it is required to evaluate the bioindication efficiency of its indicative structural elements, which respond distinctly to changes in anthropogenic factors on the whole and in the degree of human impact upon water bodies of different types. This paper considers the findings of studying microphytobenthos indicative structural element bioindication characteristics – ecological-morphological group of benthic filamentous blue-green algae and their role in forming the respective parameters among benthonts in the littoral area of Opechen Lower Lake, located within Kyiv City residential community. Large-scale hydrotechnical construction operations conducted in the lake in 2019 greatly affected its hydromorphometric parameters by reducing the shallow-water area and disturbing the bottom sediments stability, which resulted in increase of the human load. The objective of the study was to identify key characteristics of the microphytobenthos indicative structural element under conditions of the lake’s hydromorphometric parameters alteration. Benthic algae were sampled with the MB-TE microbenthometer within the littoral area at aquatic-vegetation-free sites located in the lake’s upper and lower sections. Algae sampling and laboratory processing of samples were performed in accordance with the methods generally accepted in hydrobiology. For diatoms identification permanent slides were made with using special high-resolution mounting media. Autochthonous components in microphytobenthos, the indicative ecological-morphological group of benthic filamentous blue-green algae were distinguished proceeding from algae’s association with particular biotopes. In addition to separate characteristics (species richness, number, biomass), a multimetric index was calculated for the benthonts’ indicative group as an arithmetic average of several characteristics. The degree of human impact upon the lake ecosystem was calculated according to the proven method, consisting in distinguishing the total number of the most obvious human factors with consideration taken of their different intensity. The findings of studying the key characteristics of phytomicrobenthos indicative structural element – benthic filamentous blue-green algae in 2018–2019 confirm their high bioindication efficiency and distinct response to hydromorphometric parameters alteration in Opechen Lower Lake. As a consequence of hydromorphometric alterations the share of these algae in the benthonts’ species richness, number and biomass has decreased by half, and the vegetation-period-average multimetric index has lowered by 1.7. This gives the evidence that the conditions for bottom algae vegetation have worsened.

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Section: матеріал і методи дослідженьunclassified

Мікрофітобентос Як Біоіндикатор Зміни Гідроморфометричних Параметрів Водного Об’єкту Міста Києва

Davydov

Larionova

2020

TernopilBioSciIssues

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“…У мікрофітобентосі еколого-морфологічні групи виділені з урахуванням характеристик приуроченості водоростей до певних біотопів [1,4,8,9,10,11,14,17].…”

Section: матеріал і методи дослідженьunclassified

“…Дослідження еколого-морфологічної структури мікрофітобентосу озер урбанізованих територій нечисленні [3,17], тому такі дослідження є актуальними.…”

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Еколого-Морфологічна Структура Мікрофітобентосу Озера Тельбін

Davydov

Kravtsova

2020

TernopilBioSciIssues

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The paper considers the findings of studies on ecological-morphological structure of microphytobenthos in Telbin Lake located in the residential community of Kyiv city. The research study aimed to distinguish ecological-morphological groups of algae in microphytobenthos of the human-impacted waterbody within the urban area and to evaluate the role of microphytobenthos structural components in forming a certain type of algal community. Microphytobenthos was sampled with the MB-TE microbenthometer within the littoral area at aquatic-vegetation-free sites and within the deep-water area of the lake. Algae sampling and laboratory processing of samples were performed in accordance with the methods generally accepted in hydrobiology. For diatoms identification permanent slides were made with special high-resolution mounting media. Ecological-morphological groups of benthic algae were distinguished considering the habitats of algae. The relative share in the microphytobenthos species richness was calculated for each group. The degree of human impact on the lake ecosystem was evaluated according to the proven method, consisting in distinguishing the total number of factors, which most frequently affect the lake ecosystem. The findings of studies on the ecological-morphological structure of microphytobenthos in Telbin Lake have made it possible to distinguish 7 ecological-morphological groups of algae. The species richness is mainly formed by periphytont and plankton, and benthonts are for the most part represented by the ecological-morphological group of eurytopic littoral diatoms. In the high-degree human impact waterbody (8 points) the share of benthonts’ major ecological-morphological groups in the species richness decreases in 1.6–2 times, and the shares of periphyton and plankton increase 1.3–2-fold respectively, as compared with low-degree human impact waterbody (3 points). The resulting unstable algal community consisting mainly of species getting to the lake bottom from other habitats is defined as algal aggregation, which is indicative of unfavorable conditions for residential algal flora development. Various waterbodies of Ukraine can differ significantly in the environmental variables playing a determining role in microphytobenthos structure and abundance. Microphytobenthos may act as a reliable biological indicator of aquatic ecosystem’s disturbance caused by human pressure upon waterbodies, responding to such pressure with the transformation of its structural elements. For several waterbodies of Ukraine detailed analysis of microphytobenthos ecological-morphological structure made it possible to characterize bottom algal communities and to distinguish algal cenoses, which allowed to assess ecological state deterioration in different areas of the waterbodies under study. The information on the microphytobenthos structural components of urban lakes is scarce. Therefore, studying the ecological-morphological structure of microphytobenthos in various waterbodies within Kyiv city is of high importance.

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“…Ecological characteristics of algae-indicators are given according to Coesel (1975), Van Dam & Mertens (1994), Barinova et al (2006), Štastný (2010). Recent publications (Oksiyuk 2009, Klochenko et al 2013 on the ecological groups of algae were also taken into account.…”

Section: Sampling and Laboratory Studiesmentioning

confidence: 99%

Assessment of the ecological state of the Kiev Reservoir by the bioindication method

Klochenko

Shevchenko

Barınova

et al. 2014

Oceanological and Hydrobiological Studies

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The ecological state of the Kiev Reservoir affected by intensive contamination as a result of the accident at the Chernobyl Nuclear Power Station in 1986 was assessed in terms of the species-indicators of epiphytic algae occurring in the fouling of higher aquatic plants. It has been found that inhabitants of slowly flowing and moderately warm waters, alkaliphiles, indifferent organisms in relation to water salinity, nitrogen-autotrophic taxa tolerating elevated concentrations of organically bound nitrogen, β-mesosaprobionts and eurysaprobes (in relation to organic contamination) and eutraphentic organisms (indicators of the trophic state) prevailed in phytoepiphyton of the Kiev Reservoir.As a result of comparison of the original results with literature data obtained prior to the accident, it has been found that over a span of about 30 years (from the 1970s-1980s to 2010-2013), the taxonomic structure of phytoepiphyton remained almost unchanged. At the same time, the intensity of eutrophication, alkalization, and thermofication processes increased.

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Ecological and Morphological Structure of Microphytobenthos

Cited by 8 publications

References 0 publications

Мікрофітобентос Як Біоіндикатор Зміни Гідроморфометричних Параметрів Водного Об’єкту Міста Києва

Мікрофітобентос Як Біоіндикатор Зміни Гідроморфометричних Параметрів Водного Об’єкту Міста Києва

Еколого-Морфологічна Структура Мікрофітобентосу Озера Тельбін

Assessment of the ecological state of the Kiev Reservoir by the bioindication method

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