Across
- 3. puts nutrients in lakes
- 6. sunlit surface layer away from shore
- 9. destroy terrestrial and aquatic habitats
- 12. small amount of plant nutrients
- 13. high tide creature
- 14. add excess plant nutrients to lakes
- 16. 40% of Earth's photosynthesis
- 18. headwater streams are shallow
- 19. water accumulates in streams
- 20. between low and high tides
Down
- 1. provide recreation for birdwatchers
- 2. occurs from algal growth
- 4. many nutrients
- 5. oysters, sea stars
- 7. home of Nemo
- 8. protect against coastal damage
- 10. has lots of coastal wetlands
- 11. degrades ocean-bottom habitats
- 15. fall between extremes of enrichment
- 17. too dark for photosynthesis