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Rockweed (Fucus distichus) is a seaweed found in the middle intertidal zone of Glacier Bay National Park. According to the park’s website, "Gas-filled bladders at the tip of each branch help keep the plant floating near the surface when the tide is in, and thus increases the amount of light available for its energy needs. Light is filtered out rapidly as it passes through water. Rockweed also secretes a mucus-like substance which helps keep it moist during low tide."
Glacier Bay National Park is located in southeast Alaska. The park is also an important marine wilderness area known for its spectacular tidewater glaciers, icefields, and tall coastal mountains. The park a popular destination for cruise ships is also known for its sea kayaking and wildlife viewing opportunities.
Glacier Bay National Park is home to humpback whales which feed in the park's protected waters during the summer, both black and grizzly bears, moose, wolves, sea otters, harbor seals, steller sea lions, and numerous species of sea birds.
The dynamically changing park, known for its large, contiguous, intact ecosystems, is a United Nations biosphere reserve and a UNESCO World Heritage site.
- © John L. Dengler
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Alaska America Beardslee Islands Department of the Interior Fucus distichus GLBA Glacier Bay Glacier Bay National Park and Preserve NPS National Park Service North America U.S. US USA United States United States of America algae bladderwrack flora horizontal kelp nature outdoor outdoors outside plant plants popweed protected land rockweed seaweed southeast Alaska unnamed island #38 wilderness
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- Glacier Bay National Park, Alaska