Unit 3 Ecology Part 1

1. only about 10 percent of energy stored as biomass in a trophic level is passed from one level to the next
4. the natural home or environment of an animal, plant, or other organism
7. any kind of green plant.
8. an organism that primarily obtains food by the killing and consuming of other organisms
9. is an organism that causes ecological or economic harm in a new environment where it is not native
10. is the inherent inclination of a living organism towards a particular complex behavior, containing both innate (inborn) and learned elements
11. organisms that predators kill for food
13. is a non-living part of an ecosystem that shapes its environment
14. a system of interlocking and interdependent food chains
15. series of organisms each dependent on the next as a source of food
16. step in a nutritive series, or food chain, of an ecosystem
17. a biological community of interacting organisms and their physical environment
18. is a living organism that shapes its environment
20. is a graphical representation of the energy found within the trophic levels of an ecosystem

2. is anything that constrains a population's size and slows or stops it from growing
3. an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material
5. a species' average population size in a particular habitat
6. the direct or indirect interaction of organisms that leads to a change in fitness when the organisms share the same resource
12. occurs when animals are exposed to the same stimuli repeatedly, and eventually stop responding to that stimulus
19. pertains to any of the organisms in most trophic levels in a food chain, except for producers and decomposers