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Gut Microbial Diversity and Ecological Specialization in Four Sympatric Lemur Species Under Lean Conditions

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Abstract

The gut microbiome is gaining recognition for its role in primate nutrition, but we stand to benefit from microbiome comparisons across diverse hosts and environmental conditions. We compared gut microbiome structure in four lemur species from four phylogenetic lineages, including 9 individual mouse lemurs (Microcebus danfossi), 6 brown lemurs (Eulemur fulvus), 20 sifakas (Propithecus coquereli), and a single sportive lemur (Lepilemur grewcockorum). In northwestern Madagascar, these species are sympatric, but use different feeding strategies to cope with environmental challenges, including relying on tree gums and insects (mouse lemurs), and some vs. significant leaf matter (brown lemurs vs. sifakas and sportive lemurs). From one fecal sample collected per lemur in the dry season in the Anjajavy Forest, we determined gut microbiome diversity, variability, and membership via 16S rRNA sequencing. The lemurs harbored strongly species-specific gut microbiomes. Brown lemurs showed more diverse and generalized consortia; mouse lemurs, sifakas, and the sportive lemur had less diverse consortia with more distinct memberships. Consistent with their fallback foods, mouse lemur microbiomes included taxa putatively associated with gum and insect digestion, whereas those of sifakas and the sportive lemur showed stronger and distinct signatures of leaf fiber and secondary compound metabolism. These results point to feeding strategy, intertwined with host phylogeny, as a driver of gut microbiome composition, but highlight real-time dietary specificity as a contributing driver of microbiome diversity. While illuminating how gut microbiomes facilitate host nutrition on challenging foods, these results help explain how ecologically diverse primates living in sympatry may differentially cope with seasonal or stochastic lean times.

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Acknowledgments

We thank the managers, guides, and staff of the Anjajavy Lodge and Reserve for project facilitation, as well as the staff of MICET and the University of Antananarivo’s Mention Zoologie et Biodiversité Animale for help securing permits. We thank Dr. Bobby Schopler for his help sampling nocturnal lemurs. Sarah Owens and the Argonne National Laboratory provided timely sequencing data. Funding was provided by the NSF (BCS-1749898 to LKG and CMD); the Global Wildlife Conservation’s Lemur Conservation Action Fund and IUCN SOS (to MBB and LKG); the John Simon Guggenheim Foundation (to ADY), the Duke Lemur Center (to MBB and LKG); and Anjajavy le Lodge (to LKG, ER, HAR, and MBB). This is Duke Lemur Center publication #1488.

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LKG and MBB conceived of the study. LKG, ADY, CMD, and MBB acquired funding. LKG, ER, HAR, and MBB performed field work. LKG performed laboratory work under CMD. LKG and EDF completed bioinformatic and statistical analyses under ADY. LKG drafted the manuscript with help from MBB. All authors contributed to final manuscript preparation.

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Correspondence to Lydia K. Greene.

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Handling Editor: Joanna Setchell.

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Greene, L.K., Rambeloson, E., Rasoanaivo, H.A. et al. Gut Microbial Diversity and Ecological Specialization in Four Sympatric Lemur Species Under Lean Conditions. Int J Primatol 42, 961–979 (2021). https://doi.org/10.1007/s10764-021-00257-9

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  • DOI: https://doi.org/10.1007/s10764-021-00257-9

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