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Interference Competition Among Household Strains of Pseudomonas
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Interference Competition Among Household Strains of Pseudomonas
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Journal Article
Interference Competition Among Household Strains of Pseudomonas
2016
Overview
Bacterial species exhibit biogeographical patterns like those observed in larger organisms. The distribution of bacterial species is driven by environmental selection through abiotic and biotic factors as well dispersal limitations. We asked whether interference competition, a biotic factor, could explain variability in habitat use by Pseudomonas species in the human home. To answer this question, we screened almost 8000 directional, pairwise interactions between 89 Pseudomonas strains including members of the Pseudomonas aeruginosa (n = 29), Pseudomonas fluorescens (n = 21), and Pseudomonas putida (n = 39) species groups for the presence of killing. This diverse set of Pseudomonas strains includes those isolated from several different habitats within the home environment and includes combinations of strains that were isolated from different spatial scales. The use of this strain set not only allowed us to analyze the commonality and phylogenetic scale of interference competition within the genus Pseudomonas but also allowed us to investigate the influence of spatial scale on this trait. Overall, the probability of killing was found to decrease with increasing phylogenetic distance, making it unlikely that interference competition accounts for previously observed differential habitat use among Pseudomonas species and species groups. Strikingly, conspecific P. aeruginosa killing accounted for the vast majority of the observed killing, and this killing was found to differ across the habitat type and spatial scale of the strains’ isolation. These data suggest that interference competition likely plays a large role in the within-species dynamics of P. aeruginosa but not other household Pseudomonas species.
Publisher
Springer Science + Business Media,Springer US,Springer Nature B.V
Subject
/ Biomedical and Life Sciences
/ Ecology
/ Geoecology/Natural Processes
/ Habitats
/ Humans
/ Microbial Interactions - physiology
/ Pseudomonas aeruginosa - classification
/ Pseudomonas aeruginosa - growth & development
/ Pseudomonas aeruginosa - isolation & purification
/ Pseudomonas fluorescens - classification
/ Pseudomonas fluorescens - growth & development
/ Pseudomonas fluorescens - isolation & purification
/ Pseudomonas putida - classification
/ Pseudomonas putida - growth & development
/ Pseudomonas putida - isolation & purification
/ Species
