BIOA01H3 Lecture Notes - Herbaceous Plant, Cnidaria, Ecotone

• School: UTSC
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Mark Fitzpatrick

Document Summary

Population size = (birth rate + immigration) (death rate + emigration) (n) 100. Sea turtles large offspring , low survival rate. Mammals small offspring, parental involvement high survival rate. Diseases**, human intervention, pests* and competition** for: food, shelter, mates. A species has a number of variables that affect it and it affects. A 3d space that includes all variables the species requires and affect. Omnivore - animals that eat both vegetation and other animals. Paratism ( 1 benefits as the other loses) Commensalism (one benefits as the other is unaffected) Factors that affect the distribution of organisms include. Movement of individuals away from centers of high population density or from their area of origin. Organisms that are intentionally or accidentally relocated from their original distribution. Disrupt the communities or ecosystems to which they have been introduced. Invasive > if it spreads without predator. Some organisms do not occupy all of their potential range.