The Intestinal Microbiota of Tadpoles Differs from Those of Syntopic Aquatic Invertebrates

Lyra, Mariana L.; Bletz, Molly C.; Haddad, Célio F. B.; Vences, Miguel

doi:10.1007/s00248-017-1109-5

Cited by 18 publications

(13 citation statements)

References 20 publications

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“…Similarly, a study focused on non-human primates found that host phylogeny had a larger impact than dietary niche on gut microbiomes [33]. This finding is also supported by studies in other taxa including larval amphibians and aquatic invertebrates [71]. Previous studies found a more prominent role of host diet in shaping the gut microbiome [72,73], particularly within clades such as lizards [74], fish [32,67,75], birds [76,77], or mammals [78].…”

Section: Discussionmentioning

confidence: 66%

Host-associated microbiomes are predicted by immune system complexity and climate

et al. 2020

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Background: Host-associated microbiomes, the microorganisms occurring inside and on host surfaces, influence evolutionary, immunological, and ecological processes. Interactions between host and microbiome affect metabolism and contribute to host adaptation to changing environments. Meta-analyses of hostassociated bacterial communities have the potential to elucidate global-scale patterns of microbial community structure and function. It is possible that host surface-associated (external) microbiomes respond more strongly to variations in environmental factors, whereas internal microbiomes are more tightly linked to host factors. Results: Here, we use the dataset from the Earth Microbiome Project and accumulate data from 50 additional studies totaling 654 host species and over 15,000 samples to examine global-scale patterns of bacterial diversity and function. We analyze microbiomes from non-captive hosts sampled from natural habitats and find patterns with bioclimate and geophysical factors, as well as land use, host phylogeny, and trophic level/ diet. Specifically, external microbiomes are best explained by variations in mean daily temperature range and precipitation seasonality. In contrast, internal microbiomes are best explained by host factors such as phylogeny/immune complexity and trophic level/diet, plus climate. Conclusions: Internal microbiomes are predominantly associated with top-down effects, while climatic factors are stronger determinants of microbiomes on host external surfaces. Host immunity may act on microbiome diversity through top-down regulation analogous to predators in non-microbial ecosystems. Noting gaps in geographic and host sampling, this combined dataset represents a global baseline available for interrogation by future microbial ecology studies.

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Section: Discussionmentioning

confidence: 66%

Host-associated microbiomes are predicted by immune system complexity and climate

et al. 2020

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“…The microbiome of tadpoles from this study is slightly different than previous studies. Proteobacteria and Firmicutes dominated in other studies [31,[64][65][66] but here we found that Fusobacteria were also important. Alpha and phylogenetic diversity were also mostly higher in our study than in previous ones [31,[64][65][66].…”

Section: Discussionsupporting

confidence: 66%

“…Proteobacteria and Firmicutes dominated in other studies [31,[64][65][66] but here we found that Fusobacteria were also important. Alpha and phylogenetic diversity were also mostly higher in our study than in previous ones [31,[64][65][66]. The knowledge about the gut microbiome of tadpoles is still limited to a few species and quantitative comparisons of diversity across studies is problematic because of differences in sampling procedures, sample processing, data cleaning, and the algorithms and databases.…”

Section: Discussionsupporting

confidence: 66%

Multilevel community assembly of the tadpole gut microbiome

Corrêa

Rodríguez²,

Emer

et al. 2020

Preprint

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AbstractThe assembly of local communities is likely to reflect the effects of local environmental factors associated with filters that act at larger spatial scales. Dissecting these multiscale effects remains a timely challenge that is particularly important for host-associated microbiomes. We investigated the relative roles of local selection (due to host species identity) and regional effects (due to water body identity) on the community structure of bacteria in the gut of tadpoles from three biogeographic areas and used graph theory and metanetwork approaches to explore and illustrate the distribution of bacteria across different ponds. The pond of origin, which represents a regional species pool of bacteria, was in general more important in shaping the gut microbiome of tadpoles than host species identity. The resulting metanetworks are modular and indicate relatively few species of bacteria occurring in more than one pond. Thus, each pond represents a relatively distinct species pool of bacteria available for community assembly of the tadpole microbiomes. Our findings indicate that microbiome community assembly in amphibian larvae, as in many other communities, is a multiscale process with important regional effects that constrain how local (i.e. host-dependent) filters act to influence microbiome community composition.

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“…1b) in this study. In another study, the composition and abundance of intestinal microbiota was found to be quite different in aquatic invertebrates collected from a single small pond [33]. These results suggested that certain microorganisms derived from the environment might be selectively colonized and established in the gut of the host.…”

Section: Discussionmentioning

confidence: 99%

Spatial structure of the microbiome in the gut of Pomacea canaliculata

Lü

et al. 2019

BMC Microbiol

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Background: Gut microbes can contribute to their hosts in food digestion, nutrient absorption, and inhibiting the growth of pathogens. However, only limited studies have focused on the gut microbiota of freshwater snails. Pomacea canaliculata is considered one of the worst invasive alien species in the world. Elucidating the diversity and composition of the microbiota in the gut of P. canaliculata snails may be helpful for better understanding the widespread invasion of this snail species. In this study, the buccal masses, stomachs, and intestines were isolated from seven P. canaliculata snails. The diversity and composition of the microbiota in the three gut sections were then investigated based on high-throughput Illumina sequencing targeting the V3-V4 regions of the 16S rRNA gene.Results: The diversity of the microbiota was highest in the intestine but lowest in the buccal mass. A total of 29 phyla and 111 genera of bacteria were identified in all of the samples. In general, Ochrobactrum, a genus of putative cellulose-degrading bacteria, was the most abundant (overall relative abundance: 13.6%), followed by Sediminibacterium (9.7%), Desulfovibrio (7.8%), an unclassified genus in the family Aeromonadaceae (5.4%), and Cloacibacterium (5.4%). The composition of the microbiota was diverse among the different gut sections. Ochrobactrum (relative abundance: 23.15% ± 7.92%) and Sediminibacterium (16.95 ± 5.70%) were most abundant in the stomach, an unclassified genus in the family Porphyromonadaceae (14.28 ± 7.29%) and Leptotrichia (8.70 ± 4.46%) were highest in the buccal mass, and two genera in the families Aeromonadaceae (7.55 ± 4.53%) and Mollicutes (13.47 ± 13.03%) were highest in the intestine. Conclusions:The diversity and composition of the microbiome vary among different gut sections of P. canaliculata snails. Putative cellulose-degrading bacteria are enriched in the gut of P. canaliculata.

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The Intestinal Microbiota of Tadpoles Differs from Those of Syntopic Aquatic Invertebrates

Cited by 18 publications

References 20 publications

Host-associated microbiomes are predicted by immune system complexity and climate

Host-associated microbiomes are predicted by immune system complexity and climate

Multilevel community assembly of the tadpole gut microbiome

Spatial structure of the microbiome in the gut of Pomacea canaliculata

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