Collector's curves for the combined sequence datasets for Buildings 1 and 2. Collector's curves illustrating the observed and estimated OTU richness and the number of sequences sampled in the pooled datasets of Building 1 (A) and Building 2 (B) at the evolutionary distance of 0.03. ▲, estimated number of OTUs; -, observed number of OTUs.
Rintala et al. BMC Microbiology 2008 8:56 doi:10.1186/1471-2180-8-56