In the ecosystem when the top predator the wolf is removed and years later returned to the park. By looking at the delicate balance between different species, both scientists hope to learn how to manage and preserve these ecosystems and others worldwide. In panama, on Barro Colorado island an ecological preserve created through the making of the panama canal, Stuart Davies hopes to uncover some of the mysteries of a complex ecosystem the rainforest. Man im the director of the center for Tropical Forest science, which is a group who study the rainforests of the world. And we Work Together as one very Large Network to try to understand how rainforests function and how theyre gonna change in the future. Narrator tropical rainforests are believed to be the oldest terrestrial ecosystems on earth. They are home to over 5 million known species of plants, animals, and insects, with millions more yet to be discovered. And trees play an essential role in the diversity of these intricate ecosyste