Ecology Crossword

5. a biological community of interacting organisms and their physical environment.
8. all the inhabitants of a particular town, area, or country.
9. an organism that causes ecological and economic harm to an enviornment that is not native.
10. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
11. a person, company, or country that makes, grows, or supplies goods or commodities for sale.
13. when a new patch of land is created or exposed for the first time
14. the regions of the surface, atmosphere, and hydrosphere of the earth occupied by living organisms.
16. relating to or resulting from living things, especially in their ecological relations.
18. an association between two organisms in which one benefits and the other derives neither benefit nor harm.
19. the doctrine that mutual dependence is necessary to social well-being.
20. a system of interlocking and interdependent food chains.

1. the process through which populations of living organisms adapt and change.
2. a group of people living in the same place or having a particular characteristic in common.
3. any single identifiable source of pollution from which pollutants are discharged, such as a pipe, ditch, ship or factory smokestack.
4. is an important scientific tool, used to identify different organisms, based on the organism's observable traits.
6. the envelope of gases surrounding the earth or another planet.
7. when a climax community or intermediate community is impacted by a disturbance.
12. the practice of living as a parasite in or on another organism.
15. physical rather than biological; not derived from living organisms.
17. a person who purchases goods and services for personal use.