Abstract
Identifying the major forces driving variation in gut microbiomes enhances our understanding of how and why symbioses between hosts and microbes evolved. Gut prokaryotic community variation is often closely associated with host evolutionary and ecological variables. Whether these same factors drive variation in other microbial taxa occupying the animal gut remains largely untested. Here, we present a one-to-one comparison of gut prokaryotic (16S rRNA metabarcoding) and microeukaryotic (18S rRNA metabarcoding) community patterning among 12 species of wild lemurs. Lemurs were sampled from dry forests and rainforests of southeastern Madagascar and display a range of phylogenetic and ecological niche diversity. We found that while lemur gut prokaryotic community diversity and composition vary with host taxonomy, diet, and habitat, gut microeukaryotic communities have no detectable association with any of these factors. We conclude that gut microeukaryotic community composition is largely random, while gut prokaryotic communities are conserved among host species. It is likely that a greater proportion of gut microeukaryotic communities comprise taxa with commensal, transient, and/or parasitic symbioses compared with gut prokaryotes, many of which form long-term relationships with the host and perform important biological functions. Our study highlights the importance of greater specificity in microbiome research; the gut microbiome contains many “omes” (e.g., prokaryome, eukaryome), each comprising different microbial taxa shaped by unique selective pressures.
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Data Availability
Data accessibility: 18S rRNA raw reads have been uploaded to the NCBI database (BioProject PRJNA913825) and will be released upon manuscript acceptance. 16S rRNA reads were published under NCBI BioProject PRJNA723621.
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Acknowledgements
We thank the Madagascar Ministry of Environment, Forests, and Ecology; and Madagascar National Parks in Andringitra National Park, Isalo National Park, Ranomafana National Park, and Zombitse-Vohibasia National Park for allowing us to conduct this field research. We thank Centre ValBio research station and MICET/ICTE for providing logistical support in Madagascar.
Funding
This work was supported by the following funders: the Animal Behaviour Society Student Research Grant; the American Society of Primatologists General Small Grant; the Global Wildlife Conservation’s Lemur Conservation Action Fund and IUCN’s Save Our Species (SOS); Grant-in-Aid of Research from Sigma Xi, The Scientific Research Society; HHMI Sustaining Excellence-2014 grant (#52008116), Primate Conservation, Inc.; Rowe-Wright Primate Fund; Society of Systematic Biologists Graduate Research Award; a Stony Brook University Graduate Student Employment Union Professional Development Award; a Stony Brook University Interdepartmental Doctoral Program in Anthropological Sciences Research Award; and the University of Kentucky Ribble Endowment Fund.
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M. E. D., Z. L. H., C. E. K., and D. W. W. conceived and designed this study. M. E. D., A. K. R., L. J. R., F. Z., and S. N. collected samples. M. E. D, A. K. R., P. C. W., and D. W. W. contributed field equipment, facilities, and/or reagents. M. E. D., Z. L. H., and C. E. K. conducted laboratory work. M. E. D., Z. L. H., C. E. K., and K. M. E. analyzed the data. M. E. D., Z. L. H., and C. E. K. wrote the first draft of the manuscripts and all coauthors helped write and edit subsequent drafts.
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Patricia C. Wright is on the advisory board of Primate Conservation, Inc. (PCI), one of the funders of this project. She did not advise PCI on funding this project. All other authors declare no competing interests.
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Donohue, M.E., Hert, Z.L., Karrick, C.E. et al. Lemur Gut Microeukaryotic Community Variation Is Not Associated with Host Phylogeny, Diet, or Habitat. Microb Ecol 86, 2149–2160 (2023). https://doi.org/10.1007/s00248-023-02233-7
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DOI: https://doi.org/10.1007/s00248-023-02233-7