Across
- 4. Species that signal environmental health.
- 8. Organisms that eat others for energy.
- 9. Traits improving survival and reproduction.
- 11. Positions in a food chain/web.
- 12. Substances needed for survival and growth
Down
- 1. Species with a major ecosystem impact.
- 2. Organisms that make their own food.
- 3. Pathways of energy flow in ecosystems.
- 5. Movement of nutrients in an ecosystem.
- 6. living environmental factors
- 7. Able to be maintained long-term.
- 10. Taking in food.