Across
- 2. nutrient circuits in ecosystems
- 5. amount of nutrients a plant can absorb
- 7. provided by the sun for plants
- 11. organisms that get their food from outside sources
- 12. organisms that produce their own food
- 16. amount of light energy converted to chemical energy
- 18. total primary production
- 19. biological variation
- 20. typically omnivores, fourth level of food chain
- 21. nonliving organic matter
- 24. _________ gases reflect infrared radiation back towards Earth
- 25. predator at the top of the food chain, not threatened by any other animals in the food chain
- 26. matter cannot be created or distroyed
- 27. element that is necessary for energy production to increase
Down
- 1. _______ is taken up and released by plants through photosynthesis and respiration
- 3. plants, first level of food chain
- 4. this happens due to the accumulation of chemicals and toxins in bodies of water
- 6. decomposers
- 8. concentrates toxins at higher trophic levels where biomass is lower
- 9. water transpired by plants and evaporated from a landscape
- 10. amount of chemical energy converted to new biomass
- 13. overgrowth of algae
- 14. changes to a population over generations
- 15. GPP minus energy used by primary producers
- 17. second level of food chain
- 22. what is the environment called where animals interact with other living things and abiotic factors?
- 23. third level of food chains, carnivores