Water Quality Vocabulary Crossword

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Across
  1. 4. Species A non-native organism that spreads and can harm the environment.
  2. 6. The process where excess nutrients cause rapid plant and algae growth, damaging aquatic ecosystems.
  3. 7. Simple water organisms that can multiply rapidly and form blooms.
  4. 9. Substances needed for growth that can cause problems when too many enter waterways.
  5. 10. The area of land where water drains into the same river, lake or lough.
  6. 11. A harmful substance produced by some types of blue-green algae.
  7. 13. A nutrient from sources such as fertilisers that can encourage algae growth.
Down
  1. 1. An animal without a backbone that can be used to assess water quality.
  2. 2. The variety of different living organisms found in an ecosystem.
  3. 3. Mussel An invasive freshwater species with striped shells that can change aquatic ecosystems
  4. 5. The farming of crops and animals, which can contribute to nutrient pollution.
  5. 8. Water flowing over land that can carry pollutants into rivers and lakes.
  6. 12. A nutrient found in fertilisers that can contribute to eutrophication.