Every member of an ecosystem community needs to be present in order to keep your land healthy and vibrant. That includes the carnivores - both terrestrial and avian. But one carnivore affects that ecosystem community more than the others: the keystone carnivore. And Coyotes play the role of the keystone carnivore in many of the landscapes of North America.
This posting discusses how global warming alters the ocean ecosystem to create ocean deserts. We use tropical oceans as an example of such deserts. Another example discussed is the creation of ocean dead zones by the over use of fertilizers.