Ecology I

3. a linear sequence of organisms where nutrients and energy is transferred from one organism to the other
4. the living organisms that shape up the environment
7. organism that breaks down dead organic material
9. an interaction between organisms or species in which both require a resource that is in limited supply
11. an organism that cannot produce its own food and must eat other plants and/or animals to get energy
14. a non-living part of an ecosystem that shapes its environment
15. a simple learned behavior in which an animal gradually stops responding to a repeated stimulus
17. conversion of one form of energy into another, or the movement of energy from one place to another
18. the variety of all living things and their interactions
19. animals that are killed and eaten by other animals

1. an organism that causes ecological or economic harm in a new environment where it is not native
2. a community of living organisms (plants, animals and microbes) in a particular area
4. the sum total mass of living organisms in a specific area of habitat
5. an ecosystem's maximum number of organisms of a species that can survive in that particular environment
6. consists of all the food chains in a single ecosystem
8. each level in an ecosystem only gives 10% of its energy to the levels above it
10. an organism that creates its own food or energy
12. a place where an organism makes its home
13. the position an organism occupies in a food web
16. organisms that hunt and kill other organisms for food\