Mounds of kelp on the beaches is a good sign...http://www.ocregister.com/articles/kelp-640656-beach-beaches.html
The mounds of kelp that recently washed onto local beaches point to a thriving offshore ecosystem created by restoration efforts over the past decade, experts say.
Ten years ago, there was practically no kelp off Orange County’s coast. Pollution and an overabundance of predators such as sea urchins had decimated the kelp forests, killing 80 percent of what Southern California had a century ago.
But over the past decade, environmentalists and others planted nearly 5 acres of kelp along coastal Southern California. They planted lab-grown kelp, transplanted healthy kelp from existing beds, released kelp spores and removed kelp predators, namely sea urchins, which can take over and obliterate a kelp forest if left unchecked.
Those efforts seem to have paid off: The kelp is back.
“This is just a sign of how healthy our kelp forest has become. Just 10 years ago, there was almost no kelp on the Orange County coast,” said Ray Hiemstra, associate director of programs for Orange County Coastkeeper, who has worked on kelp restoration for 15 years.