Species coexistence in simple microbial communities: unravelling the phenotypic landscape of co-occurring Metschnikowia species in floral nectar

Environmental Microbiology
María I PozoHans Jacquemyn

Abstract

Identifying the ecological processes that underlie the distribution and abundance of species in microbial communities is a central issue in microbial ecology and evolution. Classical trade-off based niche theories of resource competition predict that co-occurrence in microbial communities is more likely when the residing species show trait divergence and complementary resource use. We tested the prediction that niche differentiation explained the co-occurrence of two yeast species (Metschnikowia reukaufii and M. gruessii) in floral nectar. Assessment of the phenotypic landscape showed that both species displayed a significantly different physiological profile. Comparison of utilization profiles in single versus mixed cultures indicated that these two species did not compete for most carbon and nitrogen sources. In mixed cultures, M. reukaufii grew better in sucrose solutions and in the presence of the antimicrobial compound digitonin than when grown as pure culture. M. gruessii, on the other hand, grew better in mixed cultures in glucose and fructose solutions. Overall, these results provide clear evidence that M. reukaufii and M. gruessii frequently co-occur in nectar and that they differ in their phenotypic response to variat...Continue Reading

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Citations

Feb 25, 2018·Yeast·Callie R Chappell, Tadashi Fukami
Oct 7, 2016·Proceedings. Biological Sciences·Manpreet K DhamiTadashi Fukami
Jan 7, 2021·Microbial Ecology·Sergio Álvarez-PérezBart Lievens
Oct 13, 2021·Current Biology : CB·Bailey Crowley, Avery Russell

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