Emerging Sponge Models of Animal-Microbe Symbioses

Pita, Lucía; Fraune, Sebastian; Hentschel, Ute

doi:10.3389/fmicb.2016.02102

Cited by 52 publications

(42 citation statements)

References 96 publications

(98 reference statements)

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“…The search for common traits or functions that define host‐associated bacteria is of interest for understanding bacterial symbiosis (Pita et al ., ; Hernandez‐Agreda et al ., ). The genus Synechococcus seems to have experienced a stronger evolutionary pressure to adapt to the sponge environment than the other three genera studied here, as indicated by its sponge‐associated representatives having more unique genomic features than what would be predicted based on the ANI (Fig.…”

Section: Resultsmentioning

confidence: 99%

Detecting signatures of a sponge‐associated lifestyle in bacterial genomes

Díez‐Vives

Esteves

Costa

et al. 2018

Environ Microbiol Rep

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Sponges interact with diverse and rich communities of bacteria that are phylogenetically often distinct from their free-living counterparts. Recent genomics and metagenomic studies have indicated that bacterial sponge symbionts also have distinct functional features from free-living bacteria; however, it is unclear, if such genome-derived functional signatures are common and present in different symbiont taxa. We therefore compared here a large set of genomes from cultured (Pseudovibrio, Ruegeria and Aquimarina) and yet-uncultivated (Synechococcus) bacteria found in either sponge-associated or free-living sources. Our analysis revealed only very few genera-specific functions that could be correlated with a sponge-associated lifestyle. Using different sets of sponge-associated and free-living bacteria for each genus, we could however show that the functions identified as 'sponge-associated' are dependent on the reference comparison being made. Using simulation approaches, we show how this influences the robustness of identifying functional signatures and how evolutionary divergence and genomic adaptation can be distinguished. Our results highlight the future need for robust comparative analyses to define genomic signatures of symbiotic lifestyles, whether it is for symbionts of sponges or other host organisms.

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Section: Resultsmentioning

confidence: 99%

Detecting signatures of a sponge‐associated lifestyle in bacterial genomes

Díez‐Vives

Esteves

Costa

et al. 2018

Environ Microbiol Rep

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“…Sponges (phylum Porifera) are considered valuable model systems in host-microbiome research due to the abundance and diversity within their associated microbial communities (Pita, Fraune, & Hentschel, 2016), with a total of 52 bacterial phyla and candidate phyla discovered among sponge hosts (Thomas et al, 2016). Spongemicrobiome interactions are numerous and complex, and microbial symbionts may confer a number of benefits to their host including nutrition and waste metabolism (Freeman, Thacker, Baker, & Fogel, 2013;Karimi et al, 2018;Moitinho-Silva et al, 2017;Thomas, Rusch, et al, 2010), acclimation to ocean acidification (Ribes et al, 2016), reduction in host surface fouling (On, Lau, & Qian, 2006) and production of compounds that deter predation of the sponge host (Garate, Blanquer, & Uriz, 2015).…”

Section: Introductionmentioning

confidence: 99%

Host genetics and geography influence microbiome composition in the spongeIrcinia campana

Griffiths

Antwis

Lenzi

et al. 2019

Journal of Animal Ecology

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Marine sponges are hosts to large, diverse communities of microorganisms. These microbiomes are distinct among sponge species and from seawater bacterial communities, indicating a key role of host identity in shaping its resident microbial community. However, the factors governing intraspecific microbiome variability are underexplored and may shed light on the evolutionary and ecological relationships between host and microbiome.Here, we examined the influence of genetic variation and geographic location on the composition of the Ircinia campana microbiome.We developed new microsatellite markers to genotype I. campana from two locations in the Florida Keys, USA, and characterized their microbiomes using V4 16S rRNA amplicon sequencing.We show that microbial community composition and diversity is influenced by host genotype, with more genetically similar sponges hosting more similar microbial communities. We also found that although I. campana was not genetically differentiated between sites, microbiome composition differed by location.Our results demonstrate that both host genetics and geography influence the composition of the sponge microbiome. Host genotypic influence on microbiome composition may be due to stable vertical transmission of the microbial community from parent to offspring, making microbiomes more similar by descent. Alternatively, sponge genotypic variation may reflect variation in functional traits that influence the acquisition of environmental microbes. This study reveals drivers of microbiome variation within and among locations, and shows the importance of intraspecific variability in mediating eco‐evolutionary dynamics of host‐associated microbiomes.

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“…The acquisition of obligate symbionts may open up new ecological niches for the host and, thus, drive range expansion (Afkhami et al, 2014;Maher et al, 2017). Symbiont-driven ecological expansion has been documented in a wide diversity of symbiotic systems, from insects (Sudakaran et al, 2017) to corals (Silverstein et al, 2012), sponges (Pita et al, 2016), and angiosperms (Joy, 2013). It is thus important to consider how both abiotic and biotic factors determine range boundaries in mutualists (HilleRisLambers et al, 2013;Louthan et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Environment and host identity structure communities of green algal symbionts in lichens

et al. 2017

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SummaryAn understanding of how biotic interactions shape species' distributions is central to predicting host-symbiont responses under climate change. Switches to locally adapted algae have been proposed to be an adaptive strategy of lichen-forming fungi to cope with environmental change. However, it is unclear how lichen photobionts respond to environmental gradients, and whether they play a role in determining the fungal host's upper and lower elevational limits.Deep-coverage Illumina DNA metabarcoding was used to track changes in the community composition of Trebouxia algae associated with two phylogenetically closely related, but ecologically divergent fungal hosts along a steep altitudinal gradient in the Mediterranean region.We detected the presence of multiple Trebouxia species in the majority of thalli. Both altitude and host genetic identity were strong predictors of photobiont community assembly in these two species. The predominantly clonally dispersing fungus showed stronger altitudinal structuring of photobiont communities than the sexually reproducing host. Elevation ranges of the host were not limited by the lack of compatible photobionts.Our study sheds light on the processes guiding the formation and distribution of specific fungal-algal combinations in the lichen symbiosis. The effect of environmental filtering acting on both symbiotic partners appears to shape the distribution of lichens.

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Emerging Sponge Models of Animal-Microbe Symbioses

Cited by 52 publications

References 96 publications

Detecting signatures of a sponge‐associated lifestyle in bacterial genomes

Detecting signatures of a sponge‐associated lifestyle in bacterial genomes

Host genetics and geography influence microbiome composition in the spongeIrcinia campana

Environment and host identity structure communities of green algal symbionts in lichens

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