Here is lichens where primary succession has occurred.

Here Is lichens and mosses where primary succession has occurred

Here we see secondary succession a small weed that has come back

Secondary succession has occurred here and a small weed has returned

Here is climax community the final thing of completing this ecosystem and the redwood trees are really big and old not being able to grow

Since these are really big and old they have no more to gore being climax community.

As you can see this forest has no more to grow