Composition, diversity and distribution of microbenthos across the intertidal zones of Ryazhkov Island (the White Sea)

Azovsky, Andrey I.; Saburova, Maria; Tikhonenkov, Denis V.; Khazanova, Ksenya; Esaulov, Anton S.; Mazei, Yuri A.

doi:10.1016/j.ejop.2013.05.002

Cited by 22 publications

(11 citation statements)

References 34 publications

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“…The thecal plate arrangement of L. arabicus is also similar to those described in some strains of Durinskia baltica with seven precingular plates from Australian marine sediments (Murray ) and intertidal flats in the White Sea (Azovsky et al. ). Laciniporus arabicus is distinguished from Durinskia species by the shape of the first apical plate (meta‐ versus ortho‐type); the tiny size of the first precingular plate resulting in different arrangement of the ventral plate pattern; in possessing six rather than five cingular plates; in a much larger sulcal area with the anterior sulcal plate that extends into the epitheca; in the composition of the apical pore complex with distinct flap‐like projection; in possessing a single dinokaryon compared to binucleate diatom‐harboring Durinskia species; and finally, in lacking an eyespot.…”

Section: Discussionsupporting

confidence: 75%

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Laciniporus arabicusgen. et sp. nov. (Dinophyceae, Peridiniales), a new thecate, marine, sand‐dwelling dinoflagellate from the northern Indian Ocean (Arabian Sea)¹

Saburova

Chomérat

2018

Journal of Phycology

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A new thecate, photosynthetic, sand-dwelling marine dinoflagellate, Laciniporus arabicus gen. et sp. nov., is described from the subtidal sediments of the Omani coast in the Arabian Sea, northern Indian Ocean, based on detailed morphological and molecular data. Cells of L. arabicus are small (16.2-30.1 μm long and 13.1-23.2 μm wide), dorsoventrally compressed, with a small apical flap-shaped projection pointing to the left. The thecal plate pattern is distinguished by minute first precingular plate and sulcus, which extends into the epitheca, with large anterior and right sulcal plates. The Kofoidian thecal tabulation is Po, X, 4', 2a, 7'', 6c, 6s, 5''', 2''''. Morphologically, the revealed plate pattern has an affinity to the Peridiniales, and LSU rDNA based phylogenetic analyses placed L. arabicus within the Thoracosphaeraceae, close to calcareous-cyst producing scrippsielloids, predatory pfiesteriaceans, and photosynthetic freshwater peridinioids Chimonodinium lomnickii and Apocalathium spp. However, the thecal plate arrangement of L. arabicus differs noticeably from any currently described dinoflagellates, and the species stands out from closely related taxa by extensive differences in physiology and ecology.

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Section: Discussionsupporting

confidence: 75%

“…(); g – Murray (); h – Azovsky et al. (); i – Balech (); j – Lewis (); k – Janofske (); l – Hameed and Saburova (); m – Steidinger and Tangen (); n – Yamaguchi et al. (); o – Hoppenrath et al.…”

Section: Discussionmentioning

confidence: 99%

Laciniporus arabicusgen. et sp. nov. (Dinophyceae, Peridiniales), a new thecate, marine, sand‐dwelling dinoflagellate from the northern Indian Ocean (Arabian Sea)¹

Saburova

Chomérat

2018

Journal of Phycology

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“…On the other hand, the intertidal region provides a broad range of habitats such as mangrove, seagrass meadow, sandy beach, rocky shore, shallow coral and aquaculture area (Nordlund et al, 2014). Recent studies suggest that the intertidal region probably supports a vast biodiversity of microorganisms (Azovsky et al, 2013; Boehm et al, 2014). For example, using 454-pyrosequencing, thousands of unique bacterial OTU had been identified from intertidal sands of the California coast (Boehm et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

A High-Level Fungal Diversity in the Intertidal Sediment of Chinese Seas Presents the Spatial Variation of Community Composition

Wang

Bian

et al. 2016

Front. Microbiol.

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The intertidal region is one of the most dynamic environments in the biosphere, which potentially supports vast biodiversity. Fungi have been found to play important roles in marine ecosystems, e.g., as parasites or symbionts of plants and animals, and as decomposers of organic materials. The fungal diversity in intertidal region, however, remains poorly understood. In this study, sediment samples from various intertidal habitats of Chinese seas were collected and investigated for determination of fungal community and spatial distribution. Through ribosomal RNA internal transcribed spacer-2 (ITS2) metabarcoding, a high-level fungal diversity was revealed, as represented by 6,013 OTUs that spanned six phyla, 23 classes, 84 orders and 526 genera. The presence of typical decomposers (e.g., Corollospora in Ascomycota and Lepiota in Basidiomycota) and pathogens (e.g., Olpidium in Chytriomycota, Actinomucor in Zygomycota and unidentified Rozellomycota spp.), and even mycorrhizal fungi (e.g., Glomus in Glomeromycota) indicated a complicated origin of intertidal fungi. Interestingly, a small proportion of sequences were classified to obligate marine fungi (e.g., Corollospora, Lignincola, Remispora, Sigmoidea). Our data also showed that the East China Sea significantly differed from other regions in terms of species richness and community composition, indicating a profound effect of the huge discharge of the Yangtze River. No significant difference in fungal communities was detected, however, among habitat types (i.e., aquaculture, dock, plant, river mouth and tourism). These observations raise further questions on adaptation of these members to environments and the ecological functions they probably perform.

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“…The maximum density reached was 2.91 × 10 4 (± 1.59 × 10 3 ) cells/mL which represents a greater than 7 fold difference when compared with the maximum abundance recorded by Littman et al (2008). While this represents a high density relative to that reported by Littman et al (2008), other genera of benthic and epiphytic dinoflagellates are known to reach high densities, including Amphidinium britannicum which reached more than 10 4 cells cm 2 (Azovsky et al 2013) and Ostreopsis lenticularis, reaching densities of 23.58 × 10 4 cells g -1 Dictyota sp. (Ballantine et al 1988).…”

Section: Free-living Symbiodinium Cellsmentioning

confidence: 91%

The free-living Symbiodinium reservoir and scleractinian coral symbiont acquisition

Nitschke¹

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The genus Symbiodinium (Dinophyceae, Suessiales), a group of geographically widespread marine dinoflagellates, comprises numerous ecologically and genetically distinct taxa. Symbiodinium spp.establish intracellular symbioses with cnidarians, infecting hosts such as jellyfish, sea anemones, octocorals and reef-building corals. The energetic demands of hosts can be met at varying levels by Symbiodinium through translocation of photosynthetically-fixed carbon, assisting in the formation of coral reefs. The cnidarian-dinoflagellate symbiosis is relatively well studied. In contrast, empirical data for population dynamics, distribution, and physiology of free-living Symbiodinium are limited.Therefore this thesis aims to characterise the dynamics between free-living Symbiodinium cells, hosts, and their habitat.Free-living Symbiodinium cells have been identified in reef sediment, and this study investigated whether adult coral colonies are a significant source of benthic Symbiodinium cells. Acropora millepora colonies were translocated to bare patches of sediment (Heron Reef, Great Barrier Reef, Australia), and the surrounding sediment was sampled for Symbiodinium cells over a period of 18 months. An 8-fold increase in visually-identified cells relative to the background population was recorded from the sediment at the immediate base of coral colonies. Symbiodinium abundance returned to background levels after the removal of the coral. These fine-scale changes in the distribution of cells suggests that hard-coral may be an important 'passive' source of Symbiodinium.The 'active' supply of Symbiodinium cells to the benthos was investigated through direct contact of coral tissue with sediment. Symbiont loss was induced in the coral Pocillopora damicornis through burial of coral branches. Peak cell abundance in the sediment occurred after four days, but the photophysiology (F v /F m ) of the Symbiodinium cells was significantly impaired. By day 12, Symbiodinium cells were present only in low concentrations in sediment samples, and the majority of cells were substantially degraded. In this study, Symbiodinium appeared to survive only transiently following expulsion, with an approximate window of viability of seven days. Such a period may be sufficient for coral recruits to make contact with potential symbionts in situ.Elevated temperatures induce a range of serious, deleterious effects in Symbiodinium. The potential amelioration of these effects was investigated, testing the hypothesis that Symbiodinium cells find refuge from stress when cultured within sediment. An exclusively free-living clade A (not known to form symbioses) and the symbiosis-forming type A1 were grown with or without a microhabitat of carbonate sediment at 25°C, 28°C or 31°C. The exclusively free-living clade A was physiologically superior to symbiosis-forming A1 across all measured variables and treatment combinations: it iii reproduced faster within the sediment, exhibited high levels of motility and maintained a stable maximum quantum yield (F ...

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Composition, diversity and distribution of microbenthos across the intertidal zones of Ryazhkov Island (the White Sea)

Cited by 22 publications

References 34 publications

Laciniporus arabicusgen. et sp. nov. (Dinophyceae, Peridiniales), a new thecate, marine, sand‐dwelling dinoflagellate from the northern Indian Ocean (Arabian Sea)¹

Laciniporus arabicusgen. et sp. nov. (Dinophyceae, Peridiniales), a new thecate, marine, sand‐dwelling dinoflagellate from the northern Indian Ocean (Arabian Sea)¹

A High-Level Fungal Diversity in the Intertidal Sediment of Chinese Seas Presents the Spatial Variation of Community Composition

The free-living Symbiodinium reservoir and scleractinian coral symbiont acquisition

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Composition, diversity and distribution of microbenthos across the intertidal zones of Ryazhkov Island (the White Sea)

Cited by 22 publications

References 34 publications

Laciniporus arabicusgen. et sp. nov. (Dinophyceae, Peridiniales), a new thecate, marine, sand‐dwelling dinoflagellate from the northern Indian Ocean (Arabian Sea)1

Laciniporus arabicusgen. et sp. nov. (Dinophyceae, Peridiniales), a new thecate, marine, sand‐dwelling dinoflagellate from the northern Indian Ocean (Arabian Sea)1

A High-Level Fungal Diversity in the Intertidal Sediment of Chinese Seas Presents the Spatial Variation of Community Composition

The free-living Symbiodinium reservoir and scleractinian coral symbiont acquisition

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Laciniporus arabicusgen. et sp. nov. (Dinophyceae, Peridiniales), a new thecate, marine, sand‐dwelling dinoflagellate from the northern Indian Ocean (Arabian Sea)¹

Laciniporus arabicusgen. et sp. nov. (Dinophyceae, Peridiniales), a new thecate, marine, sand‐dwelling dinoflagellate from the northern Indian Ocean (Arabian Sea)¹