Closures for Winter
December 2, 2013: Acadia is now in winter mode, which means that most of Park Loop Road, including Cadillac Mt. road, is closed. Still open is the Ocean Drive section,from Schooner Head overlook to Otter Cliff Rd., and Jordan Pond area via Jordan Pond Rd. 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?
The historic carriage road system at Acadia National Park features 17 stone-faced bridges spanning streams, waterfalls, cliffs, and roads. The design of each bridge, such as Cobblestone Bridge, is unique.