Emilia's excellent crossword

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Across
  1. 7. plants that colonise bare ground
  2. 9. the original energy source
  3. 10. living organisms that share some of the same genetics
  4. 13. organism
  5. 15. 1m x 1m frame used to sample
  6. 16. process of change occurring in a new habitat
Down
  1. 1. number of organisms
  2. 2. producers/plants
  3. 3. the living place of an organism
  4. 4. a group of organisms that consist of a common ancestor and all its lineal evolutionary descendants
  5. 5. the types of organisms involved in the transfers and transformation
  6. 6. most common pattern of measuring distribution
  7. 8. greatest density of organisms that an area or resource can potentially support
  8. 11. combination of biotic and abiotic factors existing within a distinct government
  9. 12. N=Mxn/m
  10. 14. organisms undertake to fix carbon