Bio 3 Chapter 21

2. rapid increase of algae in an aquatic system
3. nonliving components of the environment
5. study of interaction between living things and their environment
7. organism that kills and consumes another organism
10. deepest part of the ocean at depths of 4000 m or greater
14. point of origin of a river or stream
15. frozen chunks of ice and methane found at the bottom of the ocean
16. width of a river or stream from one bank to the other bank
17. portion of the ocean that light can penetrate
18. perennially frozen portion of the Arctic tundra soil
19. branches and foliage of trees that form a layer of overhead coverage in a forest

1. living components of the environment
2. total mass of aboveground living plants per area
4. part of the ocean where no light penetrates
6. long-term, predictable atmospheric conditions present in a specific area
8. services human benefits and services provided by natural ecosystems
9. individuals that are members of the same species
11. ocean ridges formed by marine invertebrates living in warm, shallow waters within the photic zone
12. animal species that eats plankton
13. invertebrates found within the calcium carbonate substrate of coral reefs