unit 9 vocab

6. a system of food chains linked together
8. a stable, mature community that undergoes little or no change in species overtime
10. layer of ocean where sunlight can reach
13. a habitat where fresh and salt water meet
14. result of harmful substances being released into environment
15. native species in which an environment is dependent on
16. growing/livin underwater
19. permanently dark layer of the ocean below the photic zone
20. measurement of richness & variety in an ecosystem

1. ecological rule that states no 2 species can occupy the same niche in the same habitat at the same time
2. warming of Earth's climate by pollution
3. first species to populate in an area
4. opening in the sea floor where hot water flows
5. species that are found only within a limited area
7. fungus & algae
9. more organisms that resources in one area
11. organisms that are non-native and harmful to an environment
12. human Impact of removing trees at mass amounts from an ecosystem
17. group of ecosystems that share similar climates and environment
18. succession succession that begins where no biotic community previously existed