More than 90% of a once-abundant bull kelp forest, which towered from ocean floor to the surface, has disappeared from the Sonoma and Mendocino coasts over the last decade […] researchers hope their experiment may hold the key to is survival, with the potential to begin regrowing a few lost kelp beds off the Sonoma Coast as early as this fall. The experiment is being conducted through the Greater Farallones National Marine Sanctuary and the nonprofit Greater Farallones Association. The goal is to find the best way to culture and capture kelp reproductive material for introduction to select offshore sites.