ecology

2. living components of the ecosystem
4. a relationship I which both organisms benefit
9. the process of one community replacing another community that has been partially or completely destroyed
11. acommunity of organisms and their abiotic environment
12. tropical or temperate grasslands that have scattered deciduous trees and shrubs
15. one of the vast, nearly level, treeless plains of the arctic regions of Europe, Asia, and North America.
16. a close, long-term relationship between two organisms
17. the specific role of a species within its environment
18. the study of the interactions between organisms and other living and nonliving components in their environment

1. the place where an organism usually lives
3. a relationship where one organism is harmed and the other organism benefits Commensalism/ a relationship where one organism benefits while the other organism is not affected
5. deciduous forest trees that lose all of their leaves in the fall and regrow them each spring
6. a group of organisms that belong to the same species and live in a particular place at the same time Producers/ an organism that is able to make its own food
7. the development of a community in an area that has never supported life
8. the part of earth where life exists; includes all living organisms on earth
10. an organism that lives by breaking down organic matter from dead organisms
13. the introduction of harmful substances or products into the environment
14. non-living components of the ecosystem; physical and chemical characteristics of the environment