Chapter 6 Vocab

2. water that is so full of small particles, such as silt, that the water is no longer transparent but instead appears cloudy.
4. a wetland in which trees or woody shrubs predominate.
6. the community of organisms that live on or in the floor of a body of water, including rivers, lakes, estuaries, and oceans.
9. water that soaks into and refills an aquifer.
11. submerged rooted aquatic plants that tolerate salinity.
13. a chemical that an organism needs to live and grow that is taken from the environment; it can be an organ
14. an area in which the water contains low or no dissolved oxygen causing a condition known as hypoxia.
15. a group of plants and animals living and interacting with one another in a particular place
17. water that has more salinity than freshwater, but not as much as saltwater; often a result of mixing of freshwater and saltwater in estuaries.
18. a barrier or structure, natural or made by humans or animals, that is placed across a stream or river to hold water back from flowing downstream.
19. the shoulder-like sides of the stream channel from the water’s edge to the higher ground nearby.
20. the bed or channel in which a river flows.

1. a wetland dominated by reeds and other grass-like plants.
3. a long narrow island of sand that runs parallel to the mainland.
5. aquatic invertebrates with exoskeletons used as food, including various species of mollusks and crustaceans, such as crabs, shrimp, clams, and oysters.
7. study of the relationships living organisms has with each other their environment.
8. reservoirs created in river valleys by the placement of a dam across the river.
10. the number and variety of living things in an environment.
12. the bottom of a stream or river channel.
16. material that comes from plants or animals either dead or alive that is capable of decay; important in the transfer of nutrients from land to water.