Microphytobenthos Diatoms of the Black Sea: Biodiversity and Ecology

Ryabushko, L. I.; Balycheva, Daria; Ryabushko, V. I.

doi:10.37828/em.2017.14.6

Cited by 9 publications

(35 citation statements)

References 4 publications

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“…This species prefers water enriched with dissolved organic matter, and is capable to switch from autotrophic to heterotrophic or mixed type of nutrition ( Andreeva et al 2008 ). Additionally, these diatoms are ubiquitous, and widely distributed in seas and estuaries of temperate zones in habitats with a moderate level with increased level of human impact ( Kuzminova and Rudneva 2005 ; Ryabushko 2009 ).…”

Section: Resultsmentioning

confidence: 99%

Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city

Bilous¹,

Генкал²,

Zimmermann³

et al. 2021

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The diversity of centric diatoms is documented for the transitional zone of the lower part of the Southern Bug River (Ukraine) just before entering the Dnipro-Bug Estuary and compared to earlier results from the upstream sampling sites of the same river system. Benthic samples of the following sites were investigated: north of Mykolaiv City (approximately 5 km), in Mykolaiv City (near Varvarivskyi Bridge), and 5 km south of the city. Twenty-four centric diatom taxa belonging to 11 genera were identified, analysed, and documented by scanning electron microscopy (SEM) and light microscopy (LM). Among them, Aulacoseira nivalis is the first report for Ukraine, A. islandica and is the first confirmed record for the studied area since the 1930s. The maximum number of centric diatom taxa found in one station was 21, the minimum 10. Melosira subglobosa was the most common (documented in 57–80% of sites with centric diatoms) and abundant species 7.3–15.7% in relative abundance to all diatom taxa. The discovered diversity of taxa and its comparison with previous results is discussed with regard to the relevance of estuary zones in the research of diatoms.

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Section: Resultsmentioning

confidence: 99%

Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city

Bilous¹,

Генкал²,

Zimmermann³

et al. 2021

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“…The study of microalgae in farm areas is attracting the attention of ecologists because shellfish farming has a significant impact on the environment [2][3][4][5][6]. On mollusk farms, metabolites of cultivated mollusks and decomposition products of macrophytes accumulate in water and bottom sediments and can affect the species richness and quantitative characteristics of phytoplankton and microphytobenthos [7][8][9][10][11]. As a result, the concentration of organic matter increases, which can lead to an increase in the abundance of microalgae, including potentially toxic dinoflagellates [12][13][14] and diatoms [7,[15][16][17], thus posing a threat to animals and humans who consume seafood [14,[18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…On mollusk farms, metabolites of cultivated mollusks and decomposition products of macrophytes accumulate in water and bottom sediments and can affect the species richness and quantitative characteristics of phytoplankton and microphytobenthos [7][8][9][10][11]. As a result, the concentration of organic matter increases, which can lead to an increase in the abundance of microalgae, including potentially toxic dinoflagellates [12][13][14] and diatoms [7,[15][16][17], thus posing a threat to animals and humans who consume seafood [14,[18][19][20]. The worldwide expansion of shellfish farming has led to an increasing number of observations of bivalves contaminated with saxitoxins and domoic and okadaic acids that cause human poisoning [21].…”

Section: Introductionmentioning

confidence: 99%

“…Another important reason for studying microalgae in farm areas is that they are the main food for benthic invertebrates, including bivalves, echinoderms, etc. [7,[22][23][24]. For example, during the diatom bloom, the content of fatty acids in the soft tissues of cultivated oysters increased due to the increase in the contribution of planktonic and benthic food species [11].…”

Section: Introductionmentioning

confidence: 99%

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Seasonal Dynamics of Microphytobenthos Distribution in Three Ecotopes on a Mussel Farm (Black Sea)

Ryabushko,

Balycheva,

Kapranov

et al. 2023

JMSE

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As the production of cultured bivalve mollusks is increasing worldwide, there is a growing need to study the biodiversity and ecology of microalgae in the mariculture zones. This study presents multiannual data (obtained in 2015–2016 and 2018–2020) on the species composition, abundance, biomass, and community structure of microphytobenthos from three mussel farm ecotopes (mussel shells, the epiphyton of twenty macroalgal species, and sediments under collectors). In total, 150 microalgal taxa were found, including 135 diatom species with a predominance of benthic (76%), marine (65%), and cosmopolite (30%) ones. In all habitats, 10 potentially harmful species and 44 indicators of organic pollution were noted. The maximum values on the mussel shells (abundance N = 119 × 103 cells/cm2 and biomass B = 0.0489 mg/cm2) were recorded in winter with the dominance of Tabularia fasciculata; in summer, the epiphyton was on the brown alga Nereia filiformis (N = 1001 × 103 cells/cm2 and B = 2.06 mg/cm2) with the dominance of toxic Pseudo-nitzschia seriata, on the red alga Phyllophora crispa (N = 1118 × 103 cells/cm2 and B = 3.24 mg/cm2) with the dominance of T. fasciculata, and in sediments (N = 104 × 103 cells/cm3 and B = 0.046 mg/cm3) with the dominance of T. fasciculata and Bacillaria paxillifer. Statistically significant effects of the ecotope and sampling season on the diatom composition were noted. The strongest effect of temperature is observed for the mussel shell diatoms, for which the trend of abundance and biomass increase in winter and their decrease in summer is most noticeable. But in sediments, the effect of the season is reflected only in the permanent changes of the microalgae species composition. For the epiphyton, it was shown that it is temperature, rather than substrate macrophyte species, that affects its numerical structure.

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“…Different ecological groups of Black Sea diatoms have been actively studied, especially from the perspective of water quality assessment ( Petrov and Nevrova 2007 , Ryabushko et al 2017 , Ryabushko et al 2019 , Ryabushko et al 2021 ). Additionally, there is ongoing research on diatom diversity of specially protected natural sea areas of the Black Sea ( Nevrova 2015 , Ryabushko et al 2018 , Polyakova and Davidovich 2019 , Ryabushko et al 2021 , Davidovich and Polyakova 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Diatom diversity, distribution and ecology in Mediterranean ecosystems of Abrau Peninsula, north-western Caucasus

Neplyukhina¹,

Saifutdinov²,

Paskhina³

et al. 2022

BDJ

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The North Caucasus is an extensive region with a multitude of landscapes and high biological diversity. Amongst various ecosystems, the xerophytic sub-Mediterranean forests of the Abrau Peninsula (Utrish State Nature Reserve) and its vicinity are unique but have been poorly studied. The diversity of diatoms in North Caucasian ecosystems have been studied partially and only little information is available about their presence and distribution on the Abrau Peninsula. Here, we present a comprehensive check-list of diatoms sampled during a July 2021 field campaign. Samples were collected in 67 sites, including 39 permanent streams, 21 temporal (puddles) and seven permanent waterbodies. Results of the current study contribute to improving the knowledge about diatoms in the north-western Caucasus and its sub-Mediterranean ecosystems in particular. Here, we provide a detailed dataset that contains 215 freshwater and brackish diatom occurrences collected during a field campaign in July 2021. A total of 88 diatom (Bacillariophyta) taxa which belong to 12 orders, 25 families and 39 genera were collected. The genera with the highest number of occurrences per site were Gomphonema (26), Nitzschia (22), Navicula (20), Cocconeis (14), Amphora (14), Achnanthidium (14) and Planothidium (11). The genera with the highest number of infrageneric taxa were Nitzschia (8), Navicula (7), Gomphonema (6) and Mastogloia (5). Navicula blazencicae, known as the endemic of the Lake Prespa (Levkov 2007) is found from two sites in our study. Three specimens of the genus Mastogloia could not be assigned to a known species and may represent new diatom species. Distribution and ecology data are provided for each taxa. Occurrence data are given. Statistical analysis of diatom communities showed a significant dependence on habitat type and their ecological conditions.

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Microphytobenthos Diatoms of the Black Sea: Biodiversity and Ecology

Cited by 9 publications

References 4 publications

Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city

Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city

Seasonal Dynamics of Microphytobenthos Distribution in Three Ecotopes on a Mussel Farm (Black Sea)

Diatom diversity, distribution and ecology in Mediterranean ecosystems of Abrau Peninsula, north-western Caucasus

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