This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: 11/19/2009 1 Coexistence of species ? - competitive exclusion principle MIAMI - The alligator has some foreign competition at the top of the Everglades food chain. . A 13-foot Burmese python recently burst after it apparently tried to swallow a live, six- foot alligator whole, authorities said. Why cant we all just get along? Fact of the day Carrying capacity Logistic growth Testing assumptions Early laboratory cultures (Pearl 1927) Competition and coexistence 11/19/2009 2 Competition (-/-) Multiple organisms or species trying to maximize their own use of a pool of resources that are often (but not always) limited. Niche Ecological niche: total of species abiotic and biotic resource use. Niches: fundamental and realized fundamental fundamental niche niche realized niche realized niche realized niche realized niche often smaller due to biotic often smaller due to biotic limitations limitations fundamental niche fundamental niche defined by an organisms defined by an organisms abilites to live in a given abilites to live in a given abiotic environment abiotic environment Niche Fundamental vs. Realized n-dimensional hypervolume Environmental variables important to Loblolly pine 11/19/2009...
View Full Document
- Spring '10