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Fig. 1 | Environmental Microbiome

Fig. 1

From: Microbial diversity of co-occurring heterotrophs in cultures of marine picocyanobacteria

Fig. 1

Microbial diversity in enrichment cultures from the global oceans. a Origin of Prochlorococccus and Synechococcus cultures obtained over several decades and maintained in serial transfer batch cultures for 100 s – 1000s of generations. The size of each point on the map represents the number of cultures obtained from a given location. For date and methods of isolation see Table S1. b Richness of heterotrophic bacteria measured by the number of amplicon sequence variants (ASVs) exceeding a threshold relative abundance of 0.2% in Prochlorococcus (green) and Synechococcus (magenta) cultures. Richness is organized by the phylogeny of host organisms (built using the 16S–23S intertranscribed spacer (ITS) sequence, and collapsed to indicate monophyletic groups) indicated along the bottom. HL (high light) and LL (low light) designations in the triangles refer to light-adaptation features of Prochlorococcus ecotypes, as reviewed in (Biller et al. 2014 [39]), and 5.1a and 5.1b refer to subclusters of Synechococcus group 5.1 (Ahlgren and Rocap [40]). Colored boxes above each culture name indicate the years between when the culture was isolated and this analysis, as specified by the color bar in the upper left-hand corner. Inset: regression between culture age and richness

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