Closures for Winter
December 2, 2013- Acadia is now in winter mode. Most of Park Loop Road, including Cadillac Mountain Road, is closed. Still open is the Ocean Drive section, from Schooner Head overlook to Otter Cliff Road, and Jordan Pond area via Jordan Pond Road. More »
Field Guide to Marine Invertebrates - Echinoderms
Asterias rubens ("northern sea star") can be purple, reddish brown, orange, or yellow. It commonly feeds on blue mussels, restricting their lower range on the shore.
Strongylocentrotus droebachiensis ("green sea urchin") is found in the lower intertidal zone in tide pools and is abundant in the subtidal zone. In a natural cycle, large groups of urchins eat their way through kelp beds to create “urchin barrens” where seaweeds are scarce; then, the urchin population decreases because of lack of food, allowing the kelp beds to recover. Recent overfishing of urchins on the Maine coast caused notable increases in kelp populations near the shore.
Photos by Sarah Hall.
Did You Know?
Since 1999, propane-powered Island Explorer buses have carried more than two million passengers in Acadia National Park, eliminating more than 685,000 automobile trips and preventing 6,444 tons of greenhouse gases. The fare-free buses are supported by your entrance fees. More...