BIO205H5 Lecture Notes - Lecture 17: Keystone Species, Eastern Gray Squirrel, Snowshoe Hare
Document Summary
Back to tadpoles and predators: different predators go after tadpoles. Communities can be organismic (clements: looking at an environment gradient, clear separations of communities. Communities can be individualistic (gleason: each species are adapted to a range of environmental conditions of its own, no clear separation between communities, there is a gradual change. Burdock community differs between locations: burdock grows everywhere, the insect communities changes as it goes from south to north, more individualistic pattern. Grasslands are different: fire is crucial in maintaining the grassland communities, larger plants don"t survive those fires. But maybe it"s not species that count. We also have to consider the structure of communities in ecology. Remember the lynx and snowshoe hare: links to other predators and preys and other animals, etc, more complicated than just direct link to lynx and snowshoe har. Taking in account of relationships between predators and prey because we want the relationship to go in one direction.
