Across
- 3. colonization of barren land by pioneer species
- 4. the first organisms to grow on a new patch of cooled, hardened lava
- 7. the ability of an organism to withstand changes in biotic and abiotic environmental factors
- 8. sequence of changes that take place after a community is disrupted by natural disasters or human action
- 9. small organisms that drift and float in the waters of the photic zone
Down
- 1. a stable community that undergoes little or no change
- 2. any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms
- 5. the orderly, natural changes that take place in the communities of an ecosystem
- 6. a group of ecosystems with the same climax communities