Across
- 4. long narrow tanks with flowing water
- 5. nonnative species that causes harm
- 6. the natural home of an organism
- 8. position an organism holds in a food chain
- 13. buildup of soil in water
- 17. straightening or altering natural streams
- 18. number of individuals of one species
- 21. dissolved gas fish need to survive
- 22. organs fish use to breathe underwater
- 24. ratio comparing feed input to fish growth
- 27. variety of life in an ecosystem
- 28. area where land is saturated with water
- 29. number of fish per unit of water
- 30. living and nonliving things interacting together
- 33. a linear sequence showing how energy and nutrients move through an ecosystem
- 34. land area that drains water to one location
- 35. rapid growth of algae in water
- 37. cloudiness of water
- 38. farming fish and other aquatic organisms
- 39. water-based natural resources used by humans
Down
- 1. area where fish are managed or harvested
- 2. land along the edge of water
- 3. condition of water based on physical and chemical traits
- 6. facility where fish are raised
- 7. adding fish to a body of water
- 9. maximum population an ecosystem can support
- 10. an organism that is hunted for food
- 11. organism used to measure ecosystem health
- 12. farming a single species
- 14. an organism that hunts other organisms
- 15. practices that reduce disease risk
- 16. flat land that floods during high water
- 19. a limbless cold-blooded vertebrate animal with gills and fins and living wholly in water.
- 20. harvesting fish faster than they can reproduce
- 23. species that has a large impact on its ecosystem
- 25. process of fish laying eggs
- 26. careful use and protection of natural resources
- 31. farming multiple species together
- 32. species that naturally occur in an area
- 36. land area along rivers and streams