Prevalence of differential microbiome in healthy, diseased and nipped colonies of corals, Porites lutea in the Gulf of Kachchh, north-west coast of India

Krishnaswamy, Veena Gayathri; Mani, Kabilan; Kumar, Praduman; Rangasamy, Gayathri; Sridharan, Rajalakshmi; Rethnaraj, Chandran; Ganesh, Sai Sruthi Amirtha; Kalidas, Suryasri; Palanisamy, Vignesh; Chellama, Nisha Jayasingh; Satyanarayana, Ch.; Parthasarathy, V.; Rajendran, Saravanan

doi:10.1016/j.envres.2022.114622

Cited by 11 publications

(7 citation statements)

References 56 publications

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“…Previous reports have also shown that a lower abundance of Vibrio was found in bleached Diploria strigosa and Siderastrea sidereal , both Caribbean coral species, while a higher abundance was observed in bleached Pavona duerdeni and Porites lutea of the Pacific coral reef ( 62 ). Similarly, consistent with our study, Krishnaswamy et al ( 63 ) did not observe significant pathogens like Vibrio in the diseased Porites lutea and suggested that “unique species owning a unique microbial composition” contribute to it ( 63 ). Changes in the abundance of Vibrio were shown to vary across both coral species and geographic locations.…”

Section: Discussionsupporting

confidence: 92%

“…Structural changes and functional varieties may have different sensitivities to stress. In fact, Krishnaswamy et al ( 63 ) and Pogoreutz et al ( 75 ) speculated that the functional redundancy of coral microorganisms contributes to the limited differences between the healthy and diseased groups. Based on this, we propose that the changed microbial communities associated with the relatively stable functions of coral are explained by the decoupling effect of taxonomy and function ( 76 ).…”

Section: Discussionmentioning

confidence: 99%

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Bacterial Communities Vary from Different Scleractinian Coral Species and between Bleached and Non-Bleached Corals

Cheng

Xiao

et al. 2023

Microbiol Spectr

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Bacterial Communities Vary from Different Scleractinian Coral Species and between Bleached and Non-Bleached Corals

Cheng

Xiao

et al. 2023

Microbiol Spectr

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“…Other examples include fermentative bacteria such as Limosilactobacillus ( Lactobacillaceae ), formerly classified as Bacillus , isolated from healthy coral mucus 77 , capable of forming stable associations with probiotic bacteria from the genus Lactobacillus 78 . Other fermentative bacteria include Rikenellaceae RC9 gut group, Saccharofermentas , Ruminococcus , Pseudobutyrivibrio , Butyrivibrio , and Christensenellaceae R-7 group, which may play a key role in carbon metabolism and nitrogen cycling within the coral holobiont 63 , 79 , 80 . They potentially contribute to the degradation of complex carbohydrates (i.e., starch) produced by Symbiodiniaceae 63 , 81 .…”

Section: Discussionmentioning

confidence: 99%

Probiotics reshape the coral microbiome in situ without detectable off-target effects in the surrounding environment

Delgadillo-Ordoñez,

Garcias-Bonet,

Raimundo

et al. 2024

Commun Biol

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Beneficial microorganisms for corals (BMCs), or probiotics, can enhance coral resilience against stressors in laboratory trials. However, the ability of probiotics to restructure the coral microbiome in situ is yet to be determined. As a first step to elucidate this, we inoculated putative probiotic bacteria (pBMCs) on healthy colonies of Pocillopora verrucosa in situ in the Red Sea, three times per week, during 3 months. pBMCs significantly influenced the coral microbiome, while bacteria of the surrounding seawater and sediment remained unchanged. The inoculated genera Halomonas, Pseudoalteromonas, and Bacillus were significantly enriched in probiotic-treated corals. Furthermore, the probiotic treatment also correlated with an increase in other beneficial groups (e.g., Ruegeria and Limosilactobacillus), and a decrease in potential coral pathogens, such as Vibrio. As all corals (treated and non-treated) remained healthy throughout the experiment, we could not track health improvements or protection against stress. Our data indicate that healthy, and therefore stable, coral microbiomes can be restructured in situ, although repeated and continuous inoculations may be required in these cases. Further, our study provides supporting evidence that, at the studied scale, pBMCs have no detectable off-target effects on the surrounding microbiomes of seawater and sediment near inoculated corals.

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“…This may be explained by the underdevelopment of functions associated with the juvenile corals’ immune system ( 89 ). In addition, stressed coral colonies have higher α-diversity and β-diversity than healthy coral colonies ( 45 , 91 – 93 ). Diazotroph diversity (Chao1, Shannon) in Mussismilia harttii significantly increased threefold after experiencing high-temperature treatments (+2.5°C and +4°C) ( 40 ).…”

Section: Discussionmentioning

confidence: 99%

Evolutionary radiation and microbial community dynamics shape the thermal tolerance of Fungiidae in the southern South China Sea

Wei,

Chen,

et al. 2024

Microbiol Spectr

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Fungiidae have shown increased thermal adaptability in coral reef ecosystems under global warming. This study analyzes the evolutionary divergence and microbial communities of Fungiidae in the Sanjiao Reef of the southern South China Sea and explores the impact of coral evolution radiation and microbial dynamics on the heat tolerance of Fungiidae. The results found that Cycloseris was an ancient branch of Fungiidae, dating back approximately 147.8953 Mya, and Fungiidae differentiated into two ancestral clades (clades I and II) before 107.0312 Ma. Fungiidae exhibited specific symbioses with the Cladocopium C27 sub-clade. Notably, the Cladocopium C1 sub-clade has a high relative abundance in clade I, whereas the heat-tolerant Cladocopium C40 and C3u sub-clades subdominante in clade II. Regarding bacterial communities, Cycloseris costulata , the earliest divergent species, had higher bacterial β-diversity, while the latest divergent species, Lithophyllon scabra , displayed lower bacterial α-diversity and higher community stability. Beneficial bacteria dominante Fungiidae’s bacterial community (54%). The co-occurrence network revealed that microbial networks in clade II exhibited lower complexity and greater resilience than those in clade I. Our study highlights that host evolutionary radiation and microbial communities shaped Fungiidae’s thermal tolerance. The variability in subdominant Symbiodiniaceae populations may contribute to interspecific differences in thermal tolerance along the evolutionary branches of Fungiidae. The presence of abundant beneficial bacteria may further enhance the thermal ability of the Fungiidae. Furthermore, the later divergent species of Fungiidae have stronger heat tolerance, possibly driven by the increased regulation ability of the host on the bacterial community, greater microbial community stability, and interaction network resistance. IMPORTANCE Coral reefs are facing significant threats due to global warming. The heat tolerance of coral holobionts depends on both the coral host and its microbiome. However, the association between coral evolutionary radiation and interspecific differences in microbial communities remains unclear. In this study, we investigated the role of evolutionary radiation and microbial community dynamics in shaping the thermal acclimation potential of Fungiidae in the Sanjiao Reef of the southern South China Sea. The study’s results suggest that evolutionary radiation enhances the thermal tolerance of Fungiidae. Fungiidae species that have diverged more recently have exhibited a higher presence of heat-tolerant Symbiodiniaceae taxa, more stable bacterial communities, and a robust and resilient microbial interaction network, improving the thermal adaptability of Fungiidae. In summary, this study provides new insights into the thermal adaptation patterns of corals under global warming conditions.

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Prevalence of differential microbiome in healthy, diseased and nipped colonies of corals, Porites lutea in the Gulf of Kachchh, north-west coast of India

Cited by 11 publications

References 56 publications

Bacterial Communities Vary from Different Scleractinian Coral Species and between Bleached and Non-Bleached Corals

Bacterial Communities Vary from Different Scleractinian Coral Species and between Bleached and Non-Bleached Corals

Probiotics reshape the coral microbiome in situ without detectable off-target effects in the surrounding environment

Evolutionary radiation and microbial community dynamics shape the thermal tolerance of Fungiidae in the southern South China Sea

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