Mearns Rock in 1992

Mearns Rock 1992   1992 Enlarged Quadrat

What You See


The boulder is now about 50% covered with larger, older seaweed (mainly Fucus). Barnacles are filling in spaces left by dying seaweed. The beach face is heavily covered with seaweed.
 
1992 Quadrat


Larger, older seaweed (mainly Fucus) is dying off. Light-colored barnacles are filling in spaces left by dying seaweed. The mussels appear larger now.

What's Happening

The Fucus that was young in the 1990 photo has aged and is now dying off. Why is it dying off?