Trail Closures: Peregrine Falcon Nesting
Precipice Cliff, Valley Cove, and Jordan Cliff areas are closed to all public entry until further notice for peregrine falcon nesting season. More »
Cultural Connections programs rescheduled for 7/16/2014 due to weather
Ash Log Pounding demo will take place today 11 am-3 pm at the Abbe Museum downtown (26 Mount Desert St, Bar Harbor). The Burnurwurbskek Singers have been rescheduled to perform on Cadillac Summit next Wed, July 23 at 11 am.
Trail Closure: Gorge Path weekdays, 7 am - 4 pm
The section of the Gorge Path between the Hemlock Path intersection and the A. Murray Young Trail intersection is closed until rehabilitation work is completed. The closure will be in effect Mondays through Fridays only, from 7 am to 4 pm.
Field Guide to Marine Invertebrates - Mollusks
Littorina littorea ("common periwinkle") is an introduced snail that is one of the most abundant and important herbivores in the intertidal zone. Littorinids are inactive in winter and become active when temperatures rise in spring.
Nucella lapillus (gastropod)
Mytilus edulis ("blue mussel") is a bivalve that attaches to rock by byssal threads. Blue mussels are filter feeders. During red tides, blue mussels feed on dinoflagellate algae containing saxitoxin in the phytoplankton. This makes the mussels unsafe to eat and causes closures of mussel beds to harvesting. Sea stars and crabs prey on mussels, restricting them to the mid- and upper intertidal zones. Larvae settle onto shores of Acadia National Park in autumn, when masses of young mussels can be observed on the rocky shore.
This limpet is an herbivore that feeds on algal crusts, including those of calcified red algae. It is found in tide pools and the lower intertidal zone. Young individuals are typically brown, but the shell is often worn and white in older animals.
Photos by Sarah Hall.
Did You Know?
Acadia National Park's carriage road system, built by John D. Rockefeller Jr., has been called “the finest example of broken stone roads designed for horse-drawn vehicles still extant in America.” Today, you can hike or bike 45 miles of these scenic carriage roads in the park.