Across
- 2. relationship in which two species live closely together
- 4. the area where an organism lives, including the biotic and abiotic factors that affect it
- 5. single species that is not usually abundant in a community yet exerts strong control on the structure of a community
- 7. symbiotic relationship in which one organism benefits and the other is neither helped nor harmed
- 9. material formed from decaying leaves and other organic matter
- 15. day-to-day conditions of the atmosphere, including temperature, precipitation, and other factors
- 16. series of gradual changes that occur in a community following a disturbance
- 17. microscopic organisms that live in aquatic environments; includes both phytoplankton and zooplankton
- 18. first species to populate an area during succession
- 19. average year-to-year conditions of temperature and precipitation in an area over a long period of time
- 20. kind of wetland formed where a river meets the ocean
- 22. the process in which certain gases (carbon dioxide, methane, and water vapor) trap sunlight energy in Earth's atmosphere as heat
- 23. dark layer of the oceans below the photic zone where sunlight does not penetrate
- 24. layer in a rain forest found underneath the canopy formed by shorter trees and vines
- 27. sunlight region near the surface of water
- 29. dense covering formed by the leafy tops of tall rain forest trees
- 30. organisms that live attached to or near the bottom of lakes, streams, or oceans
- 32. An interaction in which one organism captures and feeds on another organism
Down
- 1. symbiotic relationship in which one organism benefits at the expense of another organism
- 3. ability of an organism to survive and reproduce under circumstances that differ from their optimal conditions
- 4. interaction in which one animal (the herbivore) feeds on producers (such as plants)
- 6. biome with long cold winters and a few months of warm weather; dominated by coniferous evergreens; also called boreal forest
- 8. symbiotic relationship in which both species benefit from the relationship
- 10. environmental conditions within a small area that differs significantly from the climate of the surrounding area
- 11. principle that states that no two species can occupy the same niche in the same habitat at the same time
- 12. succession that occurs in an area in which no trace of a previous community is present
- 13. term used to refer to a type of tree that sheds its leaves during a particular season each year
- 14. layer of permanantly frozen subsoil found in the tundra
- 21. any necessity of life, such as water, nutrients, light, food, or space
- 25. Full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions
- 26. type of succession that occurs in an area that was only partially destroyed by disturbances
- 28. term used to refer to trees that produce seed-bearing cones and have thin leaves shaped like needles
- 31. ecosystem in which water either covers the soil or is present at or near the surface for at least part of the year