Unit 8 Aquatic Ecosystems

3. Fish here must be able to survive in water that is sometimes salty and sometimes fresh, depending on tides and rainfall.
4. Lake containing LOTS of nutrients (oxygen-poor water).
5. Organisms here must hold onto rocks, because the fast current could otherwise carry them away.
9. One of earth's most fertile ecosystems.
11. Flooded forests.
13. Wider body of moving freshwater often with a slower current.
14. One of the main functions of wetlands, trapping sediments and pollutants before they reach larger bodies of water.
15. Mixture of freshwater and saltwater.
16. After a heavy rain, fertilizers wash into a lake, causing algae to grow rapidly. This overall process is known as ______.
17. Lake containing very little organic matter (mostly clear water).
19. Water that is "moving".
20. The measure of salt dissolved in a body of water.

1. Where nutrients become stuck due to moving currents & protected barrier.
2. This still-water ecosystem forms "layers", with warm water on top and colder water below.
6. Grassy wetlands.
7. Water that is not flowing.
8. This type of eutrophication happens due to human activities.
10. How cloudy/murky the water is.
12. Nitrogen and _____ are the 2 main nutrients found in artificial fertilizers.
18. Still-water ecosystem that is usually shallow enough for plants to grow across much of the bottom.