An enhanced underwater camera apparatus for seabed observation of megabenthic epifauna in the northern Yellow Sea

Yu, Nan; Sun, Song; Wang, Shiwei; Li, Qun; Zhang, Guangtao; Zhang, Fang; Sun, Xiaoxia

doi:10.1007/s00343-019-9122-9

Cited by 5 publications

(2 citation statements)

References 37 publications

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“…In this study, we focus on the gut microbiota communities of ophiuroids that lived in the Yellow Sea, a marginal sea between China and Korean Peninsula with hydrological phenomena and high biodiversity (Li, 2011). Four dominant microbenthic ophiuroids, including Stegophiura sladeni, Ophiopholis mirabilis, Ophiura sarsii vadicola, and Ophiura kinbergi (Peng et al, 2017), were selected for 16S rRNA sequencing of their gut microbial communities, which covered two feeding types, scavengers (O. sarsii vadicola, O. kinbergi, and S. sladeni;Harris et al, 2009) and suspension feeder (O. mirabilis; Yu et al, 2019). The alpha diversity and multivariate analysis revealed the spatial variation among nearshore and offshore ophiuroids, and their surrounding sediments.…”

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Gut Microbial Composition and Diversity in Four Ophiuroid Species: Divergence Between Suspension Feeder and Scavenger and Their Symbiotic Microbes

Dong

et al. 2021

Front. Microbiol.

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Gut microbiota have important roles in the survival and adaptation of the host. Ophiuroids, as the worldwide dominant benthos, have ecological roles in benthic–pelagic coupling in the sea floor. However, little is known about the composition and diversity of their gut microbiota and its potential functions in benthic ecosystems. In present study, we preformed 16S rRNA sequencing and function analysis in four dominant species (Stegophiura sladeni, Ophiopholis mirabilis, Ophiura sarsii vadicola, and Ophiura kinbergi) with two feeding types (suspension feeding/herbivores and scavenger/carnivores) from the Yellow Sea, China. Results showed that 56 phyla and 569 genera of microbiota were identified among ophiuroid guts. Multivariate and diversity analyses showed that the ophiuroid gut microbiota were independent and have higher biodiversity to the sediment microbial in the Yellow Sea. Phyla Proteobacteria, Firmicutes, Tenericutes, and Bacteroidetes were the dominant bacteria, with more than 80% abundance among the four ophiuroid species. A comparison among the gut microbial compositions among four ophiuroids showed the similarity of two offshore carnivore ophiuroids (S. sladeni and O. sarsii vadicola) and variation in the dominant microbiota types of three nearshore ophiuroids (S. sladeni, O. mirabilis, and O. kinbergi). The functional analysis revealed the significant differences of the environment-related expression in S. sladeni gut microbiota between nearshore and offshore environments. The Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt) functional annotation showed the significant divergence of metabolism pathways between two nearshore species, the herbivores O. mirabilis and carnivores S. sladeni, such as the Lipid metabolism, Carbohydrate metabolism, and Metabolism of cofactors and vitamins. The homolog search and phylogenetic analysis identified the first gut symbiotic Candidatus Hepatoplasma in S. sladeni with important roles for the nutrient metabolisms. Overall, our study reported the comprehensive data of ophiuroid gut microbiota, while the functional microbiome provides insight into the physiology and environmental adaptation in ophiuroids.

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confidence: 99%

Gut Microbial Composition and Diversity in Four Ophiuroid Species: Divergence Between Suspension Feeder and Scavenger and Their Symbiotic Microbes

Dong

et al. 2021

Front. Microbiol.

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“…The majority of species live in crevices and holes in coral or rock, submerged in muck, or at the bottom of the ocean [ 2 ]. O. mirabilis is a widespread species that aggregates at the bottom of the Yellow Sea and is found along the western coasts of the northern Pacific Ocean [ 5 , 6 ]. O. mirabilis is an epizoic organism that inhabits numerous hosts such as sponges, cnidarians, ascidians, echinoderms, algae, bryozoans, and seahorses without camouflage in the southwest Atlantic [ 7 ].…”

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confidence: 99%

Embryotoxicity and Teratogenicity of Steroidal Saponin Isolated from Ophiopholis mirabilis

Xu¹,

Yang

Zhang

et al. 2023

Toxics

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Benthic invertebrates produce secondary metabolites that serve as defenses against consumers and promote their fitness. To explore the chemical defense in marine benthic echinoderms, the chemical constituents of Ophiopholis mirabilis were investigated. A steroidal monoglycoside, asterosaponin P1, was isolated from O. mirabilis for the first-time using column chromatography. The chemical structure was characterized by spectroscopic and spectrometric methods. The embryotoxicity and teratogenicity of the isolated compound were assessed using the zebrafish embryo assay, a powerful vertebrate animal model system to study mechanisms of toxicity. When applied at high concentrations, asterosaponin P1 causes a significant increase in embryo mortality. A moderate LC50 of asterosaponin P1 appeared to be time- and concentration-dependent in its toxicity to zebrafish embryos. Teratogenicity in zebrafish embryos also included morphological defects, decreased hatchability, and a reduced heart rate. These findings revealed that steroidal saponin extracted from O. mirabilis exhibited acute toxic effects on zebrafish embryos, suggesting a potential chemical defense function in marine habitats.

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Distribution, abundance, and realized niches of meroplankton by two different mesh size nets during spring 2017 in the Southern Yellow Sea, China

Zhang,

Sun

et al. 2024

J. Ocean. Limnol.

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An enhanced underwater camera apparatus for seabed observation of megabenthic epifauna in the northern Yellow Sea

Cited by 5 publications

References 37 publications

Gut Microbial Composition and Diversity in Four Ophiuroid Species: Divergence Between Suspension Feeder and Scavenger and Their Symbiotic Microbes

Gut Microbial Composition and Diversity in Four Ophiuroid Species: Divergence Between Suspension Feeder and Scavenger and Their Symbiotic Microbes

Embryotoxicity and Teratogenicity of Steroidal Saponin Isolated from Ophiopholis mirabilis

Distribution, abundance, and realized niches of meroplankton by two different mesh size nets during spring 2017 in the Southern Yellow Sea, China

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