ENVS200 Lecture Notes - Lecture 5: Intraspecific Competition, Exponential Growth, Semelparity And Iteroparity

• School: University of Waterloo
• Department: Environmental Studies
• Course: ENVS200
• Professor: Anne Grant

Document Summary

We use the term population to describe a group of individuals of one species. The processes that change the size of populations are birth, death, and movement (either into or out of that population). Unitary organisms: such as birds, insects, reptiles, and mammals. The whole form of unitary organisms, and their program of development, is predictable and. A spider that lived a long life would not grow more legs. Modular organism: such as trees, shrubs, and herbs, chain forming bacteria and algae, corals, sponges, and very many other marine invertebrates. Modular organisms grow by the repeated production of modules" (leaves, individual cells, coral polyps, etc). Iteroparous species: among both annuals and perennials, there are some iteroparous species, that breed repeatedly, devoting some of their resources during a breeding episode not to breeding itself, but to survival to further breeding episodes.