Across
- 3. An aquatic ecosystem that has a thin layer of water over soil.
- 6. The proccess of one ecological community gradually chaning into another
- 7. The processof a water becomingnuitrent rich
- 8. A region along the coastline, where freshwater in rivers meets salt water in oceans
- 9. Underwater structure made from Coral.
Down
- 1. A stable community that no longer goes through major ecological changes.
- 2. The first species to colonize undisturbed land.
- 4. Ocean shore between the lowest low tide and highest high tide
- 5. The amount of dissolved salt in water.