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Stochastic assembly produces heterogeneous communities in the Caenorhabditis elegans intestine

Fig 5

Stochastic colonization shapes assembly of a simple multispecies community.

(A–B) The transition to bimodality was observed when adult AU37 worms were fed on a 50/50 mixture of Serratia marcescens and Enterobacter aerogenes at a range of colonization densities (106–1010 CFU/mL) for 5 d (see S1 Data). The distribution of communities at the highest colonization density is significantly different than that observed at any lower density (Mann–Whitney U test, p = 1.34 x 10−6–3.33 x 10−8). (C) The transition to bimodality in % E. aerogenes is demonstrated (bimodality coefficient [BC] calculations for bootstrapped data using 10,000 repetitions; see S3 Data for code).

Fig 5