Map: Choptank River, outside of Washington, D.C. off the Chesapeake Bay
Caption: Populations of bacterial species such as Vibrio cholerae are very patchy in distribution—they vary over both time and space. We can see here how Vibrio species vary seasonally from spring to winter in the Choptank River, a tributary of the Chesapeake, and even markedly from one week to the next. This work was done by John Heidelberg, now at The Institute for Genomic Research.
Source: Adapted from J. Heidelberg, The Institute for Genomic Research
Website: http://www.tigr.org/
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