Strain-specific higher-order interactions break phylogenetic conservatism in microbial communities
- 1Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional, Unidad Irapuato, Mexico
Abstract
Whether strains of the same species sharing the same ecological role are truly interchangeable has not been directly tested experimentally in communities, where higher-order interactions govern outcomes. Using 79 co-occurring Bacillaceae isolates from the Cuatrocienegas Basin, we combined whole-genome analyses with systematic strain substitutions in BARS, a three-species community in which a resistant strain protects a sensitive strain from an antagonist. Trait conservatism strongly predicted pairwise antagonistic outcomes. Yet across 34 assembled triads, 13 showed rescue beyond pairwise expectations and five showed suppression; single-strain substitutions rarely restored protection, although protection was recovered in one fully reconfigured triad. These outcomes could not be inferred from taxonomic relatedness, pangenomic content or pairwise assays; phylogenetic conservatism thus reaches its limit at the transition from pairwise to higher-order interactions. To explain this limit, we propose that strains behave as non-equivalent biological tiles whose interaction edges must align, a dynamic biological tessellation.
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BibTeX
@misc{corderomartinez2026strainspecific,
title = {{Strain-specific higher-order interactions break phylogenetic conservatism in microbial communities}},
author = {E. Cordero-Martinez and M. Navarro-Miranda and O. Ramirez-Sanchez and E. D. Bustos-Diaz and V. M. Higareda-Alvear and G. Moreno-Hagelsieb and J. G. Rocha and M. Hernandez-Rosales and G. Olmedo-Alvarez},
howpublished = {bioRxiv},
year = {2026},
month = oct,
doi = {10.64898/2026.10.10.758215},
url = {https://www.biorxiv.org/content/10.64898/2026.10.10.758215v1},
note = {CC BY-NC-ND},
}
RIS
TY - UNPB
TI - Strain-specific higher-order interactions break phylogenetic conservatism in microbial communities
AU - E. Cordero-Martinez
AU - M. Navarro-Miranda
AU - O. Ramirez-Sanchez
AU - E. D. Bustos-Diaz
AU - V. M. Higareda-Alvear
AU - G. Moreno-Hagelsieb
AU - J. G. Rocha
AU - M. Hernandez-Rosales
AU - G. Olmedo-Alvarez
PY - 2026
DA - 2026/10/10
PB - bioRxiv
DO - 10.64898/2026.10.10.758215
UR - https://www.biorxiv.org/content/10.64898/2026.10.10.758215v1
AB - Whether strains of the same species sharing the same ecological role are truly interchangeable has not been directly tested experimentally in communities, where higher-order interactions govern outcomes. Using 79 co-occurring Bacillaceae isolates from the Cuatrocienegas Basin, we combined whole-genome analyses with systematic strain substitutions in BARS, a three-species community in which a resistant strain protects a sensitive strain from an antagonist. Trait conservatism strongly predicted pairwise antagonistic outcomes. Yet across 34 assembled triads, 13 showed rescue beyond pairwise expectations and five showed suppression; single-strain substitutions rarely restored protection, although protection was recovered in one fully reconfigured triad. These outcomes could not be inferred from taxonomic relatedness, pangenomic content or pairwise assays; phylogenetic conservatism thus reaches its limit at the transition from pairwise to higher-order interactions. To explain this limit, we propose that strains behave as non-equivalent biological tiles whose interaction edges must align, a dynamic biological tessellation.
ER -