• Atlantic Ocean beach at Cape Cod National Seashore

    Cape Cod

    National Seashore Massachusetts

There are park alerts in effect.
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  • Access at seashore locations; reduction in programming

    Stairs at Marconi Beach are being constructed, and the beach will remain closed until late June. Parts of the Nauset Marsh and Red Maple Swamp trails are closed. More »

Marine Plants / Algae

Seagrass monitoring

Scientists sample seagrass along a transect as part of a monitoring program put it place by the National Seashore.

Though relatively inconspicuous to most visitors (with notable exceptions; i.e. "mung"), marine plants and algae play a vital ecological role. Seagrass communities are unique marine ecosystems found close to shore in intertidal and subtidal zones, usually occurring in relatively shallow water. Seagrass beds provide a variety of important functions such as the filtering of nutrients and pollutants, and the stabilization of sediments in marine systems. These communities also serve as nurseries and habitat for a variety of commercially and ecologically important species. Terrestrial algae found in the sandy soils of the dunes prevent erosion and dessication, two factors that contribute to the natural succession of these systems. Learn more about marine plants and algae by clicking the links below:

Reports and Publications:

Seagrass Resource Brief

Algal Crusts of the Dunes

The What and Why of "Mung"

Illustrated Guide to Salt Marsh Plants and Animals

Did You Know?

directional compass

Coastal waters were the original highways of the Cape. Today’s common but puzzling terms “Lower Cape” and “Upper Cape” (referring to the northern and southern areas of Cape Cod) originated with sailors. Southwesterly winds meant ships heading north were sailing "down-wind" to the Lower Cape.