Exiguobacterium algae sp. nov. and Exiguobacterium qingdaonense sp. nov., two novel moderately halotolerant bacteria isolated from the coastal algae

Liu, Fangming; Li, Yangjie; He, Wenxuan; Wang, Wenqi; Zheng, Jinshui; Zhang, De-Chao

doi:10.1007/s10482-021-01594-8

Cited by 15 publications

(2 citation statements)

References 43 publications

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“…It is speculated that this may have been related to the specific selection of male and female algae. Many previous studies, such as those of López et al ( 58 ), Etemadifar et al ( 59 ), and Liu et al ( 60 ), have reported that Exiguobacterium has the characteristics of drought tolerance, UV radiation resistance, and salt tolerance. This also explains the increased abundance of Exiguobacterium on female S. thunbergii .…”

Section: Discussionmentioning

confidence: 97%

Effects of Water Loss Stress under Tidal Effects on the Epiphytic Bacterial Community of Sargassum thunbergii in the Intertidal Zone

Sun

Yang

et al. 2022

mSphere

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Periodic water loss caused by the tide is an important environmental factor that is faced by intertidal macroalgae, but the impact of periodic water loss on the epiphytic bacterial communities associated with macroalgae is still unknown. Through this study, we found that the diversity, the relative abundance of dominant taxa, the indicator species, and the abundance of the predicted functional genes in the epiphytic bacteria on S. thunbergii changed with the time of water loss.

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Section: Discussionmentioning

confidence: 97%

Effects of Water Loss Stress under Tidal Effects on the Epiphytic Bacterial Community of Sargassum thunbergii in the Intertidal Zone

Sun

Yang

et al. 2022

mSphere

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“…Halioglobus bacteria likely derive from loggerhead prey such as mussels or oysters rather than being an intrinsic property of sea turtle mucosal surfaces, given the limited information on hostassociated Halioglobus. Similarly, the high relative abundance of the genus Exiguobacterium in oral and cloacal samples of one juvenile loggerhead (ID069) sampled upon admission may indicate recent feeding, as some Exiguobacterium species are commonly found on shrimp or algae [43][44][45].…”

Section: Oral Bacterial Communities Harbour Distinct Taxa and Could R...mentioning

confidence: 99%

Bacterial and fungal assemblages of the gut and carapace of loggerhead sea turtles

Filek,

Vuković,

Žižek

et al. 2023

Preprint

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Background The research on microbial communities of marine megafauna species represents a valuable source of knowledge that could be used for species conservation programs. Loggerhead sea turtles are marine flagship species with a currently thriving population in the Mediterranean Sea due to strong conservation efforts. In our study we aimed to further understand their biology in relation to their associated microorganisms. We investigated bacterial and fungal community structure of cloacal, oral swabs and carapace biofilm samples obtained from 18 juvenile, subadult and adult turtles as well as 8 respective enclosures, during a period of 3 years, by amplicon sequencing of 16S rRNA gene and ITS2 region of nuclear ribosomal gene. Results Our results reveal a trend of decreasing diversity of distal gut bacterial communities with the age of turtles. Notably, Tenacibaculum genus shows higher relative abundance in juveniles than in adults. Differential abundance of genera like Tenacibaculum, Moraxellaceae, Cardiobacteriaceae, and Campylobacter was observed in both cloacal and oral samples in addition to having distinct microbial compositions such as Halioglobus genera in oral samples. Fungal communities in loggerheads' cloaca were diverse and varied significantly among individuals, differing from those of tank water. However, we could not identify discernible patterns related to age, sex, or clinical status due to study limitations. Conclusion This study provides a comprehensive view of the loggerhead sea turtle bacterial microbiota and marks the first report of distal gut fungal communities studied via amplicon sequencing. Our findings expand the known microbial diversity repertoire of loggerheads, highlighting interesting taxa specific to individual body sites. This contributes to establishing a baseline understanding of the loggerhead bacterial and fungal microbiome.

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Loggerhead Sea Turtles as Hosts of Diverse Bacterial and Fungal Communities

Filek,

Vuković,

Žižek

et al. 2024

Microb Ecol

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Research on microbial communities associated with wild animals provides a valuable reservoir of knowledge that could be used for enhancing their rehabilitation and conservation. The loggerhead sea turtle (Caretta caretta) is a globally distributed species with its Mediterranean population categorized as least concern according to the IUCN Red List of Threatened Species as a result of robust conservation efforts. In our study, we aimed to further understand their biology in relation to their associated microorganisms. We investigated epi- and endozoic bacterial and endozoic fungal communities of cloaca, oral mucosa, carapace biofilm. Samples obtained from 18 juvenile, subadult, and adult turtles as well as 8 respective enclosures, over a 3-year period, were analysed by amplicon sequencing of 16S rRNA gene and ITS2 region of nuclear ribosomal gene. Our results reveal a trend of decreasing diversity of distal gut bacterial communities with the age of turtles. Notably, Tenacibaculum species show higher relative abundance in juveniles than in adults. Differential abundances of taxa identified as Tenacibaculum, Moraxellaceae, Cardiobacteriaceae, and Campylobacter were observed in both cloacal and oral samples in addition to having distinct microbial compositions with Halioglobus taxa present only in oral samples. Fungal communities in loggerheads’ cloaca were diverse and varied significantly among individuals, differing from those of tank water. Our findings expand the known microbial diversity repertoire of loggerhead turtles, highlighting interesting taxa specific to individual body sites. This study provides a comprehensive view of the loggerhead sea turtle bacterial microbiota and marks the first report of distal gut fungal communities that contributes to establishing a baseline understanding of loggerhead sea turtle holobiont.

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Exiguobacterium algae sp. nov. and Exiguobacterium qingdaonense sp. nov., two novel moderately halotolerant bacteria isolated from the coastal algae

Cited by 15 publications

References 43 publications

Effects of Water Loss Stress under Tidal Effects on the Epiphytic Bacterial Community of Sargassum thunbergii in the Intertidal Zone

Effects of Water Loss Stress under Tidal Effects on the Epiphytic Bacterial Community of Sargassum thunbergii in the Intertidal Zone

Bacterial and fungal assemblages of the gut and carapace of loggerhead sea turtles

Loggerhead Sea Turtles as Hosts of Diverse Bacterial and Fungal Communities

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