Trophic Cascade ~ Discovery & Eco-Regeneration

PBS Nature shares The Serengeti Rules episode on keystone species in ecosystems and the notion of a "trophic cascade" plus ultimately the prospect of ecosystem regeneration via "upgrading". These ecologists and natural scientists used "living labs" to better disentangle the complexities of biomes, for example, comparing tidepool life with and without starfish, pond life with and without bass fish, Scottish highlands with and without grazing sheep, parks with and without wolves, and kelp forests with and without sea otters.