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Range 0 to 100 Units
patchy ← → dense i


Welcome to the Chesapeake Bay Grasses Map.

Below are some helpful tips to guide you in your exploration:


White outlines represent research segments of the Chesapeake Bay, such as BIGMH1 in Maryland.


Yellow markers highlight segments in which significant changes have occurred.

Bay Grasses

Shaded green areas indicate bay grass growth, from patchy (dark) to dense (light).


Click or drag the timeline to see bay grass densities from 1984 to 2010. Move the upper and lower sliders to compare densities in different years.

Click anywhere to get started!