These trees are on the north east edge of the University of California, Santa Barbara campus. Why are just the oaks by the roads dying? Local MTBE condenses in the trees and the water drips to the ground. The trees cannot photosynthesize with the watere bare of total dissolved oxygen and so the tree beetels take them over.
Below a 400 long stretch of dying live oaks.
The following are visable as the road goes toward Goleta beach. Another type of sudden oak death.