What the Kelp Holds

Giant kelp is a seaweed that behaves like a tree. It can grow two feet in a day. It holds the nearshore together — nursery, pantry, breakwater — and then, in a warm year, it can vanish in a season. From the bluff it is only a dark patch on the water. From underneath it is a cathedral that breathes with the swell.

The kelp forests off Point Dume and the Channel Islands are not scenery. They are the reason the water here still has a food web worth talking about. Garibaldi, sheephead, the slow work of urchins, the otters that used to keep those urchins honest. When the water warms, the forest thins. When we take too much, it thins. The return to the sea is not only a mood. It is a relationship with something that can leave.

You do not have to become a biologist. You have to look long enough to care what happens when you are not looking. That is the whole of conservation that actually works: attention that outlasts a weekend.

Go once this month with no other errand. Look at the dark patch. If you can, get in. The light down there is a color you will not find inland.