Blurred Lines Between Determinism and Stochasticity in an Amphibian Phylosymbiosis Under Pathogen Infection DOI Open Access
Ana V. Longo, Jaiber J. Solano‐Iguaran, Andrés Valenzuela‐Sánchez

et al.

Molecular Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: March 21, 2025

ABSTRACT Selection, dispersal and drift jointly contribute to generating variation in microbial composition within between hosts, habitats ecosystems. However, we have limited examples of how these processes interact as hosts their microbes turn over across latitudinal gradients biodiversity climate. To bridge this gap, assembled an extensive dataset 580 skin bacteriomes from 22 amphibian species distributed a 10° range Chile. Amphibians are susceptible the fungal pathogen Batrachochytrium dendrobatidis ( Bd ), which infects skin, potentially leading changes normal microbiome (i.e., dysbiosis). Using comparative methods, accounting for infection implementing resampling schemes, found evidence phylosymbiosis, characterised by more similar bacterial communities closely related species. We also compared neutral affected assembly bacteria focusing on two widespread our dataset: Chilean four‐eyed frog Pleurodema thaul ) Darwin's Rhinoderma darwinii ). Neutral models revealed that chance largely facilitated occurrence ~90% both Deterministic (e.g., active recruitment microbes, microbe–microbe interactions) explained remaining fraction bacteriomes. Amphibian accounted 21%–32% variance non‐neutral taxa, whereas interaction with carried weaker but still significant effect. Our findings provide ectotherms most subject chance, yet contemporary historical contingencies leave strong signatures microbiomes even at large geographical scales.

Language: Английский

Blurred Lines Between Determinism and Stochasticity in an Amphibian Phylosymbiosis Under Pathogen Infection DOI Open Access
Ana V. Longo, Jaiber J. Solano‐Iguaran, Andrés Valenzuela‐Sánchez

et al.

Molecular Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: March 21, 2025

ABSTRACT Selection, dispersal and drift jointly contribute to generating variation in microbial composition within between hosts, habitats ecosystems. However, we have limited examples of how these processes interact as hosts their microbes turn over across latitudinal gradients biodiversity climate. To bridge this gap, assembled an extensive dataset 580 skin bacteriomes from 22 amphibian species distributed a 10° range Chile. Amphibians are susceptible the fungal pathogen Batrachochytrium dendrobatidis ( Bd ), which infects skin, potentially leading changes normal microbiome (i.e., dysbiosis). Using comparative methods, accounting for infection implementing resampling schemes, found evidence phylosymbiosis, characterised by more similar bacterial communities closely related species. We also compared neutral affected assembly bacteria focusing on two widespread our dataset: Chilean four‐eyed frog Pleurodema thaul ) Darwin's Rhinoderma darwinii ). Neutral models revealed that chance largely facilitated occurrence ~90% both Deterministic (e.g., active recruitment microbes, microbe–microbe interactions) explained remaining fraction bacteriomes. Amphibian accounted 21%–32% variance non‐neutral taxa, whereas interaction with carried weaker but still significant effect. Our findings provide ectotherms most subject chance, yet contemporary historical contingencies leave strong signatures microbiomes even at large geographical scales.

Language: Английский

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