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Images: The Oceans Are Filled with Microbes. Some Are Nasty

In July, WHOI physical oceanographer Jim Lerczak deployed surface drifters in the estuary of Plum Island Sound, north of Boston. (Photo by Ben Kirkup, Massachusetts Institute of Technology)

The surface drifters tracked the movements of surface waters in the estuary over 24-hour periods to test the effect of tidal changes on microbial populations. (Photo by Ben Kirkup, Massachusetts Institute of Technology)

Sarah Chang, a Wellesley College student, collects a water sample in the estuary of Plum Island Sound. Samples were collected each hour over a 24-hour period to explore vibrio population dynamics over tidal cycles. (Photo by Jim Lerczak, WHOI)