Vocab

3. an environmental factor that is associated with or results from the activities of living organisms
6. an organism that eats other organisms or organic matter
8. the process by which cells use oxygen to produce energy from food
10. a triangular diagram that shows an ecosystem's loss of energy, which results as energy passes through the ecosystem's food chain; each row in the pyramid represents a trophic (feeding) level in an ecosystem, and the area of a row represents the energy stored in that trophic level
12. an organism that is killed and eaten by another organism
14. the number and variety of organisms in a given area during a specific period of time
15. an organism that can make its own food by using energy from its surroundings
17. a group of organisms that are closely related and can mate to produce fertile offspring
18. in ecology, an event that changes a community by removing or destroying organisms or by altering resource availability
19. an organism that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrients
21. an organism that eats only plants
22. the replacement of one type of community by another at a single location over a period of time

1. the process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to make food
2. an environmental factor that is not associated with the activities of living organisms
4. all of the populations of species that live in the same habitat and interact with each other
5. a diagram that shows the feeding relationships between organisms in an ecosystem
7. the ruin or alteration of a place inhabited by an ecological community
9. an organism that kills and eats all or part of another organism
11. a group of organisms of the same species that live in a specific geographical area
13. all of the living organisms and their nonliving environment in a specific area
16. ecological relationship in which two or more organisms depend on the same limited resource
20. a relationship in which two different organisms live in close association with each other