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Chesapeake Bay Grasses [chesapeakebay.net], designed by Stamen Design is an interactive map that tracks a quite exotic subject: the changes of the underwater grasses at Chesapeake Bay, the largest estuary in the United States.

Accordingly, the map reveals how the fluctuations in water temperature, salinity and turbidity correlate to grass abundance, as dominant species ebb and flow and grass beds shrink and expand over a period of 30 years.

More information about this project is also available here.