<i>Biecheleria tirezensis</i> sp. nov. (Dinophyceae, Suessiales), a new halotolerant dinoflagellate species isolated from the athalassohaline Tirez natural pond in Spain

Raho, Nicolás; Fraga, Santiago; Abad, José Pascual; Marı́n, Irma

doi:10.1080/09670262.2017.1386328

Cited by 12 publications

(7 citation statements)

References 49 publications

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“…Phylogenetic studies including both freshwater and marine representatives have indicated that marine to freshwater transitions are rather frequent in dinoflagellates (e.g. Logares et al 2007;Craveiro et al 2016;Gu et al 2016;Raho et al 2018;Čalasan et al 2019). The topology of the current tree recovered also supports such a transition for Peridiniopsis borgei after it diverged from a common ancestor with C. hexapraecingulum.…”

Section: Phylogenetic Position and Taxonomic Placementmentioning

confidence: 54%

Establishing a new genus, Chiharadinium gen. nov. (Peridiniales, Dinophyceae) for a tidal pool dinoflagellate formerly known as Scrippsiella hexapraecingula

Dawut

Yamaguchi

Horiguchi

2023

Phycological Research

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To determine its accurate taxonomic position, a tidal pool bloom-forming dinoflagellate, Scrippsiella hexapraecingula was re-investigated using light, scanning and transmission electron microscopy together with a phylogenetic analysis based on concatenated ribosomal DNA sequences. The culture strains used in this study were established from intertidal rock pool samples taken from Jogashima, Kanagawa prefecture and Heisaura, Chiba prefecture, Japan and were identified as S. hexapraecingula originally described by Horiguchi and Chihara from a tidal pool in Hachijo Island, Tokyo, Japan in 1983. The thecal plate arrangement was determined as Po, X, 4 0 , 3a, 6 00 , 6c, 5s, 5 000 , 2 0000 . The internal structure was investigated for the first time. The organism has typical dinoflagellate cellular organelles such as a dinokaryotic nucleus, mitochondria with tubular cristae, trichocysts and pusule. The chloroplast was single and connected to the central pyrenoid (stalked type). The eyespot found in the sulcus is of the B type with two rows of superficial intraplastidal lipid globules directly overlain by an extraplastidal single layer of crystalline bricks enveloped by a common membrane. The apical pore is plugged by a double-layered stub-like structure. Stalk building material for attachment covered the apical pore. Phylogenetic analysis indicated that S. hexapraecingula was most closely related to a freshwater dinoflagellate, Peridiniopsis borgei, the type species of the genus Peridiniopsis. However, clear differences exist between these two organisms, including their thecal plate arrangement, habitat and habit. As a result, a new genus, Chiharadinium Dawut & T. Horiguchi gen. nov. has been proposed rather than attempting to accommodate S. hexapraecingula in the genus Peridiniopsis. The new combination, Chiharadinium hexapraecingulum (T. Horiguchi & Chihara) Dawut & T. Horiguchi comb. nov. has been proposed.

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Section: Phylogenetic Position and Taxonomic Placementmentioning

confidence: 54%

Establishing a new genus, Chiharadinium gen. nov. (Peridiniales, Dinophyceae) for a tidal pool dinoflagellate formerly known as Scrippsiella hexapraecingula

Dawut

Yamaguchi

Horiguchi

2023

Phycological Research

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“…Several marine species belonging to the Dinophyceae Class emerged in August and September [e.g. Heterocapsa rotundata (Millette et al ., 2017), Peridinium sociale (Angles et al ., 2017), Amphidoma languida (Tillmann et al ., 2019), Stoeckeria changwonensis (Jeong et al ., 2014), Biecheleria tirezensis (Raho et al ., 2018), Gymnodinium dorsalisulcum (Luo et al ., 2018), Gyrodinium fusiforme (Daugbjerg et al ., 2000)]. The relative abundance of Fungi was less than 10% in all samples, except in July at Prosika when it reached 20%.…”

Section: Resultsmentioning

confidence: 99%

Adaptations of microbial communities and dissolved organics to seasonal pressures in a mesotrophic coastal Mediterranean lake

Selak

Osterholz

Stanković³

et al. 2022

Environmental Microbiology

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In lake ecosystems, changes in eukaryotic and prokaryotic microbes and the concentration and availability of dissolved organic matter (DOM) produced within or supplied to the system by allochthonous sources are components that characterize complex processes in the microbial loop. We address seasonal changes of microbial communities and DOM in the largest Croatian lake, Vrana. This shallow lake is connected to the Adriatic Sea and is impacted by agricultural activity. Microbial community and DOM structure were driven by several environmental stressors, including drought, seawater intrusion and heavy precipitation events. Bacterial composition of different lifestyles (free-living and particle-associated) differed and only a part of the particle-associated bacteria correlated with microbial eukaryotes. Oscillations of cyanobacterial relative abundance along with chlorophyll a revealed a high primary production season characterized by increased levels of autochthonous DOM that promoted bacterial processes of organic matter degradation. From our results, we infer that in coastal freshwater lakes dependent on precipitationevaporation balance, prolonged dry season coupled with heavy irrigation impact microbial communities at different trophic levels even if salinity increases only slightly and allochthonous DOM inputs decrease. These pressures, if applied more frequently or at higher concentrations, could have the potential to overturn the trophic state of the lake.

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“…This is because many suessiacean species are belong to monospecific genera. Moreover, in some genera within the Suessiaceae group, the 18S rRNA gene does not have sufficient resolution (Jang et al, 2017b;Raho et al, 2018;Jang et al, 2022). Due to the above, the data were classified as "Ansanella, Asulcocephalium, Biecheleria, Biecheleriopsis, Leiocephalium, Pelagodinium, Piscinoodinium, Polarella, and Yihiella, " and sequences that did not match these genera but belonged to the Suessiaceae family were categorized as "Unidentified. "…”

Section: Defining Taxonomic Groups Within Suessiacean Dinoflagellatesmentioning

confidence: 99%

“…Unlike Polarella, the genus Biecheleria tends to predominate in a wide range of aquatic environments without clear environmental restrictions. Biecheleria baltica is known to live in cold waters, whereas other Biecheleria species are mainly found in temperate waters (Kremp et al, 2005;Siano et al, 2009;Takahashi et al, 2014;Raho et al, 2018). For example, most isolates of Biecheleria cincta were collected from temperate waters (Siano et al, 2009;Kang et al, 2011;Luo et al, 2013).…”

Section: Global Distribution and Habitatmentioning

confidence: 99%

Assessment of biodiversity, global distribution, and putative ecological niches of suessiacean dinoflagellates by DNA metabarcoding

Jang

2022

Front. Ecol. Evol.

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Dinoflagellates in the family Suessiaceae, so-called suessiacean dinoflagellates, play diverse roles in aquatic ecosystems, being distributed from tropical to polar waters and from marine to freshwater habitats and encompassing free-living forms, symbionts, and parasites. Despite their importance due to the variety of ecological roles and biodiversity, very few studies have characterized small suessiacean species. Recent advances in molecular techniques could provide insights into the yet unexplored ecological roles they play in aquatic environments. Using a global DNA metabarcoding dataset, this study elucidated the hidden biodiversity, global distribution, and ecological characteristics of suessiacean dinoflagellates. The results of this study indicated that the family Suessiaceae was the sixth highest in terms of read count and the ninth highest in terms of amplicon sequence variant (ASV) richness from a total of 42 categorized dinoflagellate families, suggesting that their global abundance has been greatly underestimated. Furthermore, metabarcodes of suessiacean dinoflagellates were found to be cosmopolitan in distribution, although the ecological niche of each taxon was distinctly different within the group based on their latitudinal and vertical distribution patterns. Moreover, phylogenetic analysis discovered at least five new phylogenetic groups and three new individual species within the family. Collectively, the findings of this study highlight the significance of suessiacean dinoflagellates in global aquatic ecosystems and reveal the importance of big data obtained from environmental DNA in exploring the ecological functions of understudied species.

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Biecheleria tirezensis sp. nov. (Dinophyceae, Suessiales), a new halotolerant dinoflagellate species isolated from the athalassohaline Tirez natural pond in Spain

Cited by 12 publications

References 49 publications

Establishing a new genus, Chiharadinium gen. nov. (Peridiniales, Dinophyceae) for a tidal pool dinoflagellate formerly known as Scrippsiella hexapraecingula

Establishing a new genus, Chiharadinium gen. nov. (Peridiniales, Dinophyceae) for a tidal pool dinoflagellate formerly known as Scrippsiella hexapraecingula

Adaptations of microbial communities and dissolved organics to seasonal pressures in a mesotrophic coastal Mediterranean lake

Assessment of biodiversity, global distribution, and putative ecological niches of suessiacean dinoflagellates by DNA metabarcoding

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