Bacterial predation in a marine host-associated microbiome

Welsh, Rory M.; Zaneveld, Jesse; Rosales, Stephanie M.; Payet, Jérôme P.; Burkepile, Deron E.; Thurber, Rebecca Vega

doi:10.1038/ismej.2015.219

Cited by 84 publications

(74 citation statements)

References 19 publications

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“…Finally, coral-associated bacteria may support coral resistance to algal growth simulated by overfishing given that resident bacteria defend the coral from microbial invasions (Rypien et al, 2010;Shnit-Orland et al, 2012;Welsh et al, 2016), thus potentially providing protection from algae altering the coral microbiome (Vega Thurber et al, 2012). There are clearly multiple mechanisms that influence these microbial roles and, as demonstrated above, a conflicting base of evidence.…”

Section: Evidence That Coral Microbiomes Mediate Host Resistance To Smentioning

confidence: 97%

Responses of Coral-Associated Bacterial Communities to Local and Global Stressors

et al. 2017

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The microbial contribution to ecological resilience is still largely overlooked in coral reef ecology. Coral-associated bacteria serve a wide variety of functional roles with reference to the coral host, and thus, the composition of the overall microbiome community can strongly influence coral health and survival. Here, we synthesize the findings of recent studies (n = 45) that evaluated the impacts of the top three stressors facing coral reefs (climate change, water pollution and overfishing) on coral microbiome community structure and diversity. Contrary to the species losses that are typical of many ecological communities under stress, here we show that microbial richness tends to be higher rather than lower for stressed corals (i.e., in ∼60% of cases), regardless of the stressor. Microbial responses to stress were taxonomically consistent across stressors, with specific taxa typically increasing in abundance (e.g

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Section: Evidence That Coral Microbiomes Mediate Host Resistance To Smentioning

confidence: 97%

Responses of Coral-Associated Bacterial Communities to Local and Global Stressors

et al. 2017

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“…Scleractinian corals are the fundamental ecosystem engineers, creating large intricate reefs that support diverse and abundant marine life, and filter feeders such as sponges process large volumes of seawater, recycle essential nutrients and play roles in the erosion and stabilization of coral reef structure (Ruetzler, 2004;Bell, 2008). Each individual reef invertebrate hosts a diverse microecosystem comprised bacteria, archaea, fungi, protists and viruses (Kushmaro et al, 2001;Bourne et al, 2016;Webster and Thomas, 2016;Welsh et al, 2016). These microbial communities can be host species specific and extremely diverse, with thousands of unique microbial operational taxonomic units (OTUs) known to occupy some reef species .…”

Section: Introductionmentioning

confidence: 99%

Reef invertebrate viromics: diversity, host specificity and functional capacity

Laffy

Wood‐Charlson

Turaev

et al. 2018

Environmental Microbiology

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Recent metagenomic analyses have revealed a high diversity of viruses in the pelagic ocean and uncovered clear habitat-specific viral distribution patterns. Conversely, similar insights into the composition, host specificity and function of viruses associated with marine organisms have been limited by challenges associated with sampling and computational analysis. Here, we performed targeted viromic analysis of six coral reef invertebrate species and their surrounding seawater to deliver taxonomic and functional profiles of viruses associated with reef organisms. Sponges and corals' host species-specific viral assemblages with low sequence identity to known viral genomes. While core viral genes involved in capsid formation, tail structure and infection mechanisms were observed across all reef samples, auxiliary genes including those involved in herbicide resistance and viral pathogenesis pathways such as host immune suppression were differentially enriched in reef hosts. Utilising a novel OTU based assessment, we also show a prevalence of dsDNA viruses belonging to the Mimiviridae, Caudovirales and Phycodnaviridae in reef environments and further highlight the abundance of ssDNA viruses belonging to the Circoviridae, Parvoviridae, Bidnaviridae and Microviridae in reef invertebrates. These insights into coral reef viruses provide an important framework for future research into how viruses contribute to the health and evolution of reef organisms.

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“…These results suggest, at first sight, that these two families had likely a more limited impact on the community of heterotrophic bacteria in our lakes. However, it is noteworthy that recent studies have shown that a low abundance of BALOs is not necessarily directly correlated with a lower functional impact on the dynamics of their prey (Richards et al, 2012, Williams et al, 2016, Welsh et al, 2016. Hence, despite the very low abundances of Bdellovibrionaceae and Bacteriovoracaceae found in the context of this study, their functio na l role may be not necessarily negligible.…”

Section: Discussionmentioning

confidence: 51%

Bdellovibrio and like organisms bacterial predators are not equally distributed in peri-alpine lakes

Paix

Jacquet

2017

Preprint

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Microbes drive a variety of ecosystem processes and services but still many of them remain largely unexplored because of our lack of knowledge on both diversity and functionality of some potentially key microbiological compartments. This is typically the case with and within the group of bacterial predators collectively known as Bdellovibrio and like organisms (BALOs). Here we report for the first time the abundance, distribution and diversity of the three main families of these natural and obligatory predators of gram negative bacteria in three peri-alpine lakes (e.g. lakes Annecy, Bourget and Geneva) at different depths (surface vs. 45 or 50 m) and along a few months (from August 2015 to January 2016). We show that, using PCR-DGGE and cloning-sequencing approaches, the diversity appeared relatively low and very specific to fresh waters or even of the lakes themselves. While the Peredibacteraceae family was represented mainly by a single species (i.e. Peredibacter starii), it could constitute up to 7% of the total bacterial cell abundances. Comparati vel y, the abundances of the two other families (referred to as Bdellovibrionaceae and Bacteriovaracaceae) were significantly lower. More interestingly, the distribution in the water column was very different between the three groups suggesting various life strategies/niches for each of them:Peredibactereacea dominated near surface while the Bdellovibrionaceae and the Bacteriovaracaceae were more abundant at depth. All in all, our results suggest that these bacterial predators are likely to play a significant role in mortality, carbon fluxes and prokaryotic community structure in lakes.Date: September, 2017 Correspondence : S Jacquet, INRA, UMR CARRTEL, 75 avenue de Corzent, 4200 Thonon -les-Bains, France Email : stephan.jacquet@inra.fr 1 Current address : Laboratoire MAPIEM, Université de Toulon, CS 60584, 83041 Toulon cedex 9, France not peer-reviewed) is the author/funder. All rights reserved. No reuse allowed without permission.The copyright holder for this preprint (which was . http://dx.doi.org/10.1101/194688 doi: bioRxiv preprint first posted online Sep. 27, 2017; IntroductionOver the last few years, studies on western European large and deep peri-alpines lakes have shown that these ecosystems own a very diverse and dynamic auto-and heterotrophic prokaryotic community (Comte et al., 2006 ; Personnic et al., 2009 ;Debroas et al., 2009, Berdjeb et al., 2011Berdjeb et al., 2013 ;Domaizon et al., 2013 ;Ammini et al., 2014). These studies and others have also revealed that a large variety of both biotic and abiotic factors are likely to regulate these communities. Among these factors, inorganic nutrients, viruses, nanoflagellates and other heterotrophic grazers (including ciliates and/or metazooplankto n) have been identified as key players in the dynamics of abundance or community compositio n structure patterns (Domaizon et al., 2003 ; Comte et al., 2006 ;Personnic et al., 2009b ; Thomas et al., 2011 ; Berdjeb et al., 2011;Berdjeb et al., 2013;Perga ...

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Bacterial predation in a marine host-associated microbiome

Cited by 84 publications

References 19 publications

Responses of Coral-Associated Bacterial Communities to Local and Global Stressors

Responses of Coral-Associated Bacterial Communities to Local and Global Stressors

Reef invertebrate viromics: diversity, host specificity and functional capacity

Bdellovibrio and like organisms bacterial predators are not equally distributed in peri-alpine lakes

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