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Bat Cutaneous Microbial Assemblage Functional Redundancy Across a Host-Mediated Disturbance.

Matthew Grisnik1,2, Donald M Walker3

  • 1Department of Biology, Middle Tennessee State University, Murfreesboro, TN, 37132, USA. mgrisnik@coastal.edu.

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Bat skin microbes change with seasons but maintain similar functions, indicating habitat shifts drive taxonomic changes, not functional ones. This research explores seasonal dynamics in bat cutaneous microbial communities.

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Area of Science:

  • Microbiology
  • Ecology
  • Host-Microbe Interactions

Background:

  • Host-associated microbial assemblages are crucial for host defense against pathogens.
  • Bat cutaneous bacteria exhibit antifungal properties against Pseudogymnoascus destructans.
  • Limited understanding of microbial assemblage fluctuations due to host habitat shifts.

Purpose of the Study:

  • To investigate how taxonomic and functional bat cutaneous microbial assemblages respond to seasonal habitat shifts.
  • To test hypotheses on taxonomic turnover and functional redundancy across seasons.
  • To examine seasonal and multi-winter differences in microbial assemblage structure and function.

Main Methods:

  • Comparative analysis of bat cutaneous microbial communities across different seasons (winter and summer).
  • Assessment of taxonomic structure and functional gene abundance.
  • Statistical analysis to detect differences in assemblage composition and function.

Main Results:

  • Bat cutaneous microbial assemblages are seasonally dynamic taxonomically but functionally redundant.
  • Complete taxonomic turnover observed between winter and summer assemblages.
  • No significant differences in assemblage structure or functional gene abundance across winters or seasons.

Conclusions:

  • Species sorting mechanisms, linked to host habitat shifts, drive taxonomic changes in bat cutaneous microbial communities.
  • Functional redundancy is maintained across seasons despite significant taxonomic alterations.
  • The study highlights the resilience of microbial functions despite seasonal environmental variations.