Biology

3. nutrient poor soils, canopy structure, very diverse species
8. seasons, deciduous forests
9. when succession begins from bare rock - no soil
10. communities of coral/polyps that build reefs/calcium carbonate barriers
14. area with aquatic plants in substrate/soil
15. when succesion begins with some soil present
16. between low and high tide, organisms deal with waves and partial dry times
17. where rivers meet the sea, sediments/nutrients often dropped from rivers, buffer between fresh and marine waters, very productive ecosystems
18. all the biotic and abiotic components interacting in an area
21. fires, very nutrient rich soils
22. measurement of the variety and richness of species in an ecosystem
23. fires, woody trees, wet/dry season
24. shallow seas

1. chemosynthesis supports food chain, pocket ecosystems
2. no light, no photosynthesis, depends on input from above
4. where light penetrates, photosynthesis
5. open water, sparse organisms
6. ocean seafloor, depend on nutrient input from above
7. an organism that helps define an entire ecosystem - without it, the ecosystem would be drastically different or collapse
11. Non-native species that is placed in a community
12. low growth, frozen desert, permafrost
13. sparse vegetation, mineral rich soil, biocrust
19. acidic soil, coniferous trees
20. open water
22. collection of ecosystems with similar temperatures, rainfall totals, and climax/mature communities