ENV 1301 Lecture Notes - Lecture 4: Cellular Respiration, Food Chain, Evolutionary Arms Race

• School: Baylor University
• Department: Environmental Studies
• Course: ENV 1301
• Professor: Marcum

Document Summary

Compettition: multiple organisms seek the same limited resource. Food, water, space, shelter, mates, sunlight, etc. Intraspecific competition: between members of the same species. Interspecific competition: between members of different species, results of interspecific competition. One species may exclude another from using the resource. Zebra mussels displaced native mussels in the great lakes. Quagga mussels are nor displacing zebra mussels. Or, competing species may be able to coexist. Natural selection favors individuals that use different resources or shared resources in different ways. Competing species coexist by specializing: by using different resources (small vs. large seeds, or using shared resources differently (active during the day vs. night) One member benefits while the other is harmed (+/- interactions: predations, parasitism, herbivory. Predation: process by which individuals of one species (predators) capture, kill, and consume individuals of another species (prey, effects the community. Interactions between predators and prey structure food webs. The number of predators and prey influences community composition.