Across
- 1. the maximum amount of a species that an environment can support; occurs at the top of an s-curve
- 4. when humans try to protect and save resources
- 5. when excess nutrients cause excess algae
- 10. shape of a the line on a graph of logistic growth
- 12. organisms that can make their own food
- 13. the study of the interactions of living and nonliving things in an environment
- 14. a group of organisms that can interbreed and produce fertile offspring
- 15. type of growth that occurs as a result of limiting factors
- 16. when the number of prey decreases, this happens to the number of predators
- 19. live on a plants roots and make nitrogen available to them
- 23. cutting down trees does this to the amount of carbon dioxide in the air
- 24. is the main way carbon is put into the atmosphere
- 26. burning fossil fuels does this to the amount of carbon in the air
- 27. is how carbon is taken out of the atmosphere
- 29. a way that nitrogen gets into the soil from the air
- 32. another word for heterotroph
- 33. nutrient that begins in rocks and is then taken in plants from the soil
- 35. created as a result of eutrophication; can block sunlight and release toxins into the water.
- 36. a nonliving thing that affects the stability of an ecosystem
- 38. the percent of energy remaining at each level of a food chain
- 39. a living thing that affects the stability of an ecosystem
- 41. things that have the ability to restrict the size of a population
- 42. the variety of living things in a community; more of this allows a community to be more resilient
Down
- 2. several interacting populations
- 3. the first eater in a food chain
- 6. these organsisms are the first to take in phosphorus from the ground
- 7. bacteria and fungi; they put carbon dioxide back into the air
- 8. a group of one type of organism
- 9. shape of the line on a graph of exponential growth
- 11. this happens to energy as you move up the food chain
- 14. practices that involve using renewable resources and decreasing use of nonrenewable resources
- 17. things that take in and hold carbon
- 18. cycle that involves gas in the air that is directly taken in by plants and converted into an organic compound that is used for energy by plants and animals
- 19. an organism's role or job in its environment
- 20. all of the living and nonliving things that interact in one place
- 21. all of the feeding relationships in an ecosystem
- 22. things that provide carbon to the atmosphere
- 25. type of growth that occurs when a population grows without limits
- 28. organisms that have to find a different way to get food; cannot make it themselves
- 30. a single step-wise flow of energy in an ecosystem
- 31. the only population growth that is represented by a j curve
- 33. another word for autotroph
- 34. one single living thing
- 37. where plants are in a food chain
- 40. a species that is introduced into a new environment and often takes over