by Su­san S. Golden et al. — Tran­scrip­tomic and metage­nomic meth­ods make it pos­si­ble to take a snap­shot of the processes oc­cur­ring in a mixed mi­cro­bial pop­u­la­tion; sam­pling over a time course can trans­form that im­age into a mo­tion pic­ture...