Aquatic Ecosystems

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Across
  1. 4. capture of water and holding it in an area
  2. 5. shallow zone that light reaches
  3. 6. soils are filled with infiltrated water
  4. 12. area where rivers interface with the land around them
  5. 15. organisms that swim actively in open water
  6. 16. land that drains water
  7. 17. study of water
  8. 18. bottom-dwelling organisms
  9. 20. rainfall, snowfall, etc
  10. 21. shedding of water by leaves
Down
  1. 1. areas of land periodically under water
  2. 2. floating microscopic organisms
  3. 3. increase in the amount of nutrients
  4. 7. water turning to gas and returning the the atmosphere
  5. 8. species whose survival has far-reaching consequences in an ecosystem
  6. 9. settling or dropping out of sediments & particulates
  7. 10. catchment of rain by plants before it reaches the soil
  8. 11. region near the bottom
  9. 13. presence or absence gives signs on the health of an ecosystem
  10. 14. limestone ridges found in tropical climates
  11. 19. fresh and salt water meet