State-Threatened Gopher Tortoise (Gopherus polyphemus) Gut Microbiome Analysis Reveals Health Insights into Southeastern Florida Population

Author:

Giakoumas Dimitrios S.ORCID,Moore JonORCID,Stamper EriccaORCID,Bernot Kelsie M.ORCID,Mincer Tracy J.ORCID

Abstract

AbstractThe gopher tortoise (Gopherus polyphemus), endemic to the southeastern part of the United States, is a keystone species that provides ecological support to over 350 species. Deforestation, urbanization, road mortality, and disease, over the past 100 years, have caused population decline by over 80%, causing Florida to declare the gopher tortoise a threatened species. Little is known about the gopher tortoise gut microbiome, which could play a major role in tortoise health. This study aimed to better understand the health and biology of this threatened keystone species through the characterization and analysis of their gut microbiomes in the Abacoa Greenway of Southeastern Florida using next-generation sequencing to survey the gut microbiome. Major findings include: high levels of alpha diversity; lack of significant difference of male and female alpha diversity and taxonomic composition profiles and, counterintuitively, male beta diversity was less disparate than female beta diversity; phyla associated with fiber fermentation short-chain fatty acid metabolism, Firmicutes and Bacteroidetes, predominated all samples. Notable probiotic taxa present included: Lachnospiraceae andClostridium butyricum. Potentially pathogenic taxa included:Helicobactersp. and Mollicutes sp. Pathogenetic taxa undetected: gopher tortoiseHelicobacter, andMycoplasmaspp. These results add to the understudied reptiles and tortoise gut microbiome.

Publisher

Cold Spring Harbor Laboratory

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