Theodosius Dobzhansky said in 1973, "nothing in biology makes sense except in the light of evolution". In his book, The Serengeti Rules, Sean B. Carroll said, "nothing in biology makes sense except in the light of regulation". Life is regulated at all levels: at the ecosystem, community, population, and down to the cellular and molecular levels.
If you have never seen a Kelp Forest, here is a video!
The Purple Sea Urchin - Urchin Needs
Tipping Points Principles: Ocean Tipping Points
ESA: Principles for managing marine ecosystems prone to tipping points