land ecosystems

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Across
  1. 1. succession plants and animals that colonize a barren, lifeless habitat
  2. 3. the height of an object
  3. 4. a series of people or things that follow one after another
  4. 5. a vast, flat, treeless arctic region of Europe
  5. 7. a global ecosystem composed of living organisms
  6. 8. large open area of country covered in grass
  7. 10. shows average rainfall
  8. 13. major habitat
  9. 16. faced away from the wind
  10. 17. situated on the side facing the wind
  11. 18. forest forest that grows in regions of the northern hemisphere
Down
  1. 2. effect region having little rainfall
  2. 6. Thick subsurface layer of soil
  3. 9. angular distance of a place north or south of the equator
  4. 11. species species that first colonize new habitats created by disturbance
  5. 12. arid land with usually sparse vegetation
  6. 14. species plant species that can grow with limited resources
  7. 15. dense forest rich in biodiversity