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Across 1. Fungi and bacteria that complete the breakdown process by recycling the nutrients like dead tissues and wastes back into the ecoystem 5. Frozen grassland or plain 7. Symbiosis in which one species benefits and one is harmed 8. A transition area that is formed when a freshwater river meets the ocean 12. Organisms that obtain energy from consuming other organisms 13. Large and still bodies of water 15. Fast moving freshwater biome; _____/stream 17. Organisms that become established outside their native range; ______ species 18. Forests that mainly contain large trees with broad leaves that fall off in autumn (2 Words) 22. Change that follows when a disturbance damages an existing community but leaves the soil intact (2 Words) 23. Environmental factors that arise from inorganic sources (2 Words) 25. A still body of water that is smaller than a lake 30. Environmental factors arising from organisms that may shape or affect the biosphere (2 Words) 33. The global ecosystem which encompasses all living things in the lithosphere, atmosphere, and hydrosphere and is characterized by patchiness 34. Type of lake that is nutrient poor and usually oxygen rich 35. Where the land meets the ocean; _____Zone 36. The pathway of food transfer from one trophic level to another (2 Words)

Down 2. When a community arises in a lifeless area that has no soil (2 Words) 3. Moist subarctic forests dominated by conifers that begin where the tundra ends 4. Organisims that produce their own food 6. Process that turns ammonium into solids usable by plants 9. It turns solid nitrogen back to gaseous form 10. A type of symbiosis that benefits one of the species but neither harms nor helps the either 11. An underwater landmass that extends from a continent, resulting in an area of relatively shallow water known as the ____ shelf 14. What biomke is characterized by grasslands with small trees located primarily near and immediately north and south of the equator 16. Habitat flooded with water at least some of the time 19. nutrient cycles consisting of biotic and abiotic components; ______ cycles 20. Organism that is not as abundant, but holds important ecological niches (2 Words) 21. Process that turns nitrogen gas into ammonium (2 Words) 24. Organisms that obtain chemical energy by feeding on the producers or on other ____s 26. Type of lake that is nutrient-rich and often depleted of oxygen in the deepest zone in the summer and is covered with ice in the winter 27. An area of dry land that is covered with bushes and short trees 28. The scientific study of interactions between organisms and their environment 29. Symbiosis in which both species benefit 31. When one species kills and eats the other 32. A major regional or global biotic community characterized mainly by the dominant forms of plant life and the prevailing climate