1. Populations Section #2: How Species Interact With Each Other

2. Niche the unique role of a species within an ecosystem the pattern of use of its habitat the job a species plays in an ecosystem

3. Ways in Which Species Interact competition predation parasitism mutualism commensalism symbiosis coevolution

4. Competition attempts to use the same limited resource within or between species (niche overlap) indirect – one feeds a night, other during the day niche restriction – use less than they are capable of using

6. Predation predator feeds on prey prey have evolved mechanisms to avoid or defend predators –camouflage –warning coloration –mimicry –protective covering

8. Parasitism organism lives on or in another and feeds on the host host rarely is killed by parasite because its better for the parasite to keep the host alive – host just weakens or is exposed to disease

9. Mutualism a close relationship between 2 species where each provides a benefit for the other often survival depends on this relationship ex. = bacteria in our intestines

10. Commensalism relationship where one species receives benefit while other species is neither helped nor harmed ex. = sharks & remoras

11. Symbiosis relationship in which two organisms live in close association in most, at least one species benefits

12. Coevolution over time, organisms with symbiotic relationships coevolve where the species develop adaptations that improve the benefits received ex. = flowering plants & insects

13. Do Now: