BIOL 1116 Lecture Notes - Lecture 2: 30Th Parallel North, Lion Hunting, Keystone Species
Document Summary
When there are no fish and a lot of trout, the number of invertebrates rises. Eutrophic lakes have a lot of algae; eutrophic has the most primary productivity due to lots of algae. Oligotrophic lakes are clear and you can see to the bottom, because there are no algae. Inverterbrate population is low when trout is present and algae is high. Commensalism- one benefits the other has no effect. Lion hunting, hyena eats the food that the lion has hunted after the lion is done commensalism. Keystone species- wolves in yellowstone; have an impact on every species in the community. Fundamental niche- niche you inhabit when theres no competition. Realized niche- reality of the situation, with competitors; competition is main factor in difference between fundamental and realized niche. Event: parvovirus- direct effect is the wolf population went down; the indirect effect is that the moose increased.
