Across
- 3. The number of species in an ecosystem.
- 6. The preparation of soil by mechanical movement of various types, such as digging, stirring, and overturning
- 11. Organisms that feed on dead organic matter
- 13. The variety of life forms, their genes, and ecosystems.
- 15. The EVS belief that human beings are the central or most important entity on the planet
- 16. the top, dark, spongy, organic layer of soil, formed from the decomposition of plant and animal matter
- 18. A zone of the ocean where light does not penetrate.
- 19. The final stage of ecological succession
- 21. An area containing a high proportion of endemic species under threat.
Down
- 1. A sustainable management option to manage fish populations
- 2. The excessive growth of algae due to nutrient enrichment.
- 4. The combined process of water evaporating from land surfaces and transpiring from plants into the atmosphere
- 5. Water that exists beneath the Earth's surface in pore spaces and fractures of soil, sand, and rock
- 7. The amount of biomass produced by autotrophs in a given area and time.
- 8. The worldwide collection of ecosystems interacting with the atmosphere, lithosphere, and hydrosphere
- 9. The international agreement designed to protect endangered species.
- 10. A simplified way of showing how energy moves through an ecosystem
- 12. An approach where inputs, outputs, and energy transfers are all considered.
- 14. The process of wind or water removing topsoil.
- 17. The amount of energy that decreases as it moves through trophic levels
- 20. The area of land where all the water drains into one place