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Microbial invasion of a toxic medium is facilitated by a resident community but inhibited as the community co-evolves.
Piccardi, Philippe; Alberti, Géraldine; Alexander, Jake M; Mitri, Sara.
Afiliação
  • Piccardi P; Département de Microbiologie Fondamentale, Université de Lausanne, Lausanne, Switzerland.
  • Alberti G; Département de Microbiologie Fondamentale, Université de Lausanne, Lausanne, Switzerland.
  • Alexander JM; Department of Environmental Systems Science, ETH Zurich, Zürich, Switzerland.
  • Mitri S; Département de Microbiologie Fondamentale, Université de Lausanne, Lausanne, Switzerland. sara.mitri@unil.ch.
ISME J ; 16(12): 2644-2652, 2022 12.
Article em En | MEDLINE | ID: mdl-36104451
Predicting whether microbial invaders will colonize an environment is critical for managing natural and engineered ecosystems, and controlling infectious disease. Invaders often face competition by resident microbes. But how invasions play out in communities dominated by facilitative interactions is less clear. We previously showed that growth medium toxicity can promote facilitation between four bacterial species, as species that cannot grow alone rely on others to survive. Following the same logic, here we allowed other bacterial species to invade the four-species community and found that invaders could more easily colonize a toxic medium when the community was present. In a more benign environment instead, invasive species that could survive alone colonized more successfully when the residents were absent. Next, we asked whether early colonists could exclude future ones through a priority effect, by inoculating the invaders into the resident community only after its members had co-evolved for 44 weeks. Compared to the ancestral community, the co-evolved resident community was more competitive toward invaders and less affected by them. Our experiments show how communities may assemble by facilitating one another in harsh, sterile environments, but that arriving after community members have co-evolved can limit invasion success.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Ecossistema / Espécies Introduzidas Idioma: En Ano de publicação: 2022 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Ecossistema / Espécies Introduzidas Idioma: En Ano de publicação: 2022 Tipo de documento: Article