Quantification of specific and cosmopolitan taxa. Left side: percentage of specific taxa for the three levels of environmental classification. A particular taxa is defined as specific when a given percentage of its observations belong to a single environment. That percentage is shown in the abscissa axis. Right side: percentage of cosmopolitan taxa for the three levels of environmental classification, in relation to the number of environments in which the taxa is present.
Tamames et al. BMC Microbiology 2010 10:85 doi:10.1186/1471-2180-10-85