Across
- 2. Energy lost by egestion
- 4. Third layer of the tropical rainforest
- 5. Type of tree at emergent layer
- 6. One of endangered species
- 8. Phase in which natality is equal to mortality
- 10. Nitrogen into complex organic molecules
- 12. One of effects of unplanned management & development to the ecosystem
- 14. Begins when organisms produce nitrogen-containing wastes
- 16. Lesser biomass than that of zooplanktons
- 19. Lake ecosystem: zone of decomposition
- 21. Paramecium sp. population growth
Down
- 1. Method of sustainable development
- 3. Grow a series of different types of crops on same field in sequential years
- 7. One of sustainable fishery
- 9. When a piece of sloped plane is cut into platforms
- 11. Original source of energy
- 13. One of example biogeochemical
- 15. One of the affecting factors of population growth
- 17. Step in nitrogen cycle
- 18. One of the density dependent factor
- 20. "on-site" conservation