Ecology Terms Elijah Cook 7th

2. Only ten percent of energy will pass down a trophic level.
3. Relationship in which one organism is a food source for the other.
5. A species that is indigenous to a community.
7. An organism requiring organic compounds for its principal food source.
9. Process by which carbon dioxide, water, and inorganic salts are converted into carbohydrates.
11. A system of interconnected elements, formed by the interaction of a community of organisms with their environment.
12. The environment that a species lives in.
15. Branch of biology dealing with the relations and interactions between organisms and their environment.
17. An organism that lives and feeds on dead organic matter.
19. An organism that enters a community they are not apart of; with no natural predators.
20. Cycle by which nitrogen is converted into chemical forms.
21. An assemblage of interacting populations occupying a given area.

1. An organism that breaks down the cells of dead plants.
4. Colonization of new sites by communities of organisms.
6. Process by which moisture is carried through plants: evaporation of water from plant leaves.
8. The living together of two dissimilar organisms.
10. A pattern of growth in which the population increases, then balances.
13. The absence of life.
14. A relationship between two species of organisms in which both benefit from the association.
16. A series of organisms related by predator-prey interactions.
18. The individuals of one species in a given area.