The water stuff

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Across
  1. 4. bog-like areas that are mainly fed by groundwater
  2. 5. the bottom
  3. 9. a submarine
  4. 10. when elevated water temperature causes coral to turn white then die
  5. 11. that form a barrier between the land and the sea
  6. 13. wooded wetlands
  7. 15. where the depths of the tide shift on land
  8. 16. shallow ecosystems in which the land is fully or partly submerged
  9. 17. isolated pieces of land surrounded by water
  10. 18. shallow wetlands that flood regularly
  11. 19. have distinct temperature zones
Down
  1. 1. the barrier between cold and warm water
  2. 2. areas of saturated ground
  3. 3. the most human settled biome
  4. 6. rivers that flow into the ocean
  5. 7. area below the surface that is cooler than the water above
  6. 8. the amount of accessible nutrients in an ecosystem
  7. 10. dense housings of small and large animals alike it is one of the most diverse ecosystems on the planet
  8. 12. place where 90% of wetlands have been destroyed
  9. 14. small trees that house many species around the coasts