Ecology Review

3. the study of interactions between organisms and their environment
7. a behavior where one animal disadvantages itself for the benefit of another or the group
9. a group of individuals of the same species living in the same area
11. an interaction between two organisms where one feeds on the “host”. The host is harmed while the other benefits
13. "pack behavior" that makes tasks easier
14. a mass movement of individuals to escape harsh conditions, find food, or find new mates
15. organisms that make their own food via photosynthesis
16. organisms that break down dead plant and animal matter, returning nutrients to the ecosystem

1. a ________ species has a disproportionate effect on the ecosystem
2. an interaction between two organisms where one organism benefits and the other is unaffected
4. organisms that consume other organisms for energy
5. natural environment in which an organism lives
6. an interaction between two organisms where both organisms benefit
8. an interaction where 2 organisms must compete for resources, mates, etc. both individuals are harmed
10. an organism’s role or job in its environment
12. the maximum population size that an ecosystem can support