Abstract
Gut microbiota can be transmitted either environmentally or socially and vertically at intraspecific level; however, whether gut microbiota interact along trophic levels has been largely overlooked. Here, we characterized the gut bacterial communities of weevil larvae of Curculio arakawai that infest acorns of Mongolian oak (Quercus mongolica) as well as acorn-eating mammals, Siberian chipmunk (Tamias sibiricus), to test whether consumption of seed-borne larvae remodels the gut bacterial communities of T. sibiricus. Ingestion of weevil larvae of C. arakawai significantly altered the gut bacterial communities of T. sibiricus. Consequently, T. sibiricus fed larvae of C. arakawai showed higher capability to counter the negative effects of tannins, in terms of body weight maintenance, acorn consumption, N content in feces, urine pH, and blood ALT activity. Our results may first show that seed-borne insects as hidden players have a potential to alter the gut microbiota of seed predators in the tripartite system.
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Acknowledgments
The authors would like to give thanks to Dr. Xihua Zhao, Shunbao Lu, Xiaomei Sha, and Zhenxing Wang for facilitating the analyses of fecal N and blood samples.
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Data are deposited in Qufu Normal University and are accessible if requested.
Funding
This study was supported by the National Natural Science Foundation of China (32070447 and 31760156) and the Young Talents Invitation Program of Shandong Provincial Colleges and Universities (20190601).
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XY conceived and designed the study. MW and CX carried out the experiments. JG and MJ performed data analyses. XY wrote the first draft of the manuscript, and all authors contributed substantially to revisions.
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Yi, X., Guo, J., Wang, M. et al. Inter-trophic Interaction of Gut Microbiota in a Tripartite System. Microb Ecol 81, 1075–1087 (2021). https://doi.org/10.1007/s00248-020-01640-4
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DOI: https://doi.org/10.1007/s00248-020-01640-4