Aquatic Ecosystems

3. when dense, cooler, nutrient-rich water from deep water moves towards the ocean surface
9. a ridge of jagged rock, coral or sand below the surface of the ocean
11. unwanted catch that is often killed
12. a land area that channels all snowmelt and rainfall to a singular point
13. connects marine and freshwater systems
14. a measure of all the salts dissolved in water

1. microscopic organisms that float freely in aquatic ecosystems
2. decreases as you move away from the equator
4. a measure of acidity
5. make up 50% of our oxygen
6. loss of fish stocks caused by new fishing technologies
7. the variety of plant and animal life in an ecosystem
8. a measure of dissolved solutes
10. areas where water covers the soil or is present at the surface of the soil
15. ecosystems