Across
- 1. he coined the phrase life zones
- 5. plants compete with other plants of the same species
- 7. This island is almost treeless
- 9. different plant communities grow until original plant community finally reestablishes itself
- 11. strong winds make the tree's branches all point in the same direction
- 12. consists of all organisms of the same species that inhabit a particular locality
- 14. a group of populations
- 15. these factors for plant growth might include nutrients, water and light
- 16. without stems
- 17. a species that is introduced from elsewhere
Down
- 2. Trash dumps of man or other animals
- 3. characterized by shrubs that form an open canopy
- 4. organisms that appear in a community where they were not previously found
- 6. this is at the top of the Great Basin Life Zones
- 7. Plants are oftentimes the first indicator of this
- 8. a important ecological indicator
- 10. competition between plants of different species
- 13. how many individuals of a particular species there are per unit of area