The author only gives two reasons for this loss
a ‘perfect storm’ = above average water temperature and an increase in sea urchin populations
From Monterey Herald
February 2, 2018
By Ross Clark, Earth Matters
The abundance of kelp along the California coast fluctuates, declining annually with winter storms. Since 2015, however, we have seen a “perfect storm” during which kelp abundance has declined by as much as 95 percent along the Northern California coastline. Above average water temperature and an increase in sea urchin populations have greatly reduced bull kelp abundance. The loss of this annual alga has had significant effects on other marine species, many of which rely on these forests for shelter and food.
One species that has been greatly affected by the loss of kelp is the red abalone. This mollusk relies heavily on fragments of drift kelp for food, reaching out from its rocky hiding…
View original post 535 more words