Biomes and Communities

5. the first species to take hold in an area
7. orderly natural changes and species replacements that take place in communities of an ecosystem
8. layer of permanently frozen ground
9. Belt of coniferous trees worldwide
11. ponds and lakes, streams and rivers, and wetlands.
12. The layers of the ground
14. All of earth’s water
15. rainforest that have moderate temperatures and clear seasonal changes
19. the number of people, other living organisms, or crops that a region can support without environmental decline
23. a large group of ecosystems that share the same type of climax community
24. shallow enough for sunlight
25. The ability an organism has to withstand changes in biotic and abiotic changes in the environment
27. grass roots that survive throughout the winter then enlarge and form a thick layer on the ground

1. Dominated by broad leaved hardwood trees that lose their foliage
2. the oceans, coral reefs, and estuaries
3. community a stable mature community that undergoes little to no change
4. excessive amounts of rain over 100 in rain
6. any biotic factor or a biotic factor that limits the number of organisms in an environment
10. succession that takes place after an existing community is severely disrupted in some way
13. Soil is dry - less than 25 cm rain per year
16. all earth's living things
17. succession that takes place on land where there is no living organisms
18. rainforest with Hot climate (77* lowest temp)
20. Large communities covered with rich soil, grasses and plants
21. all earth's air
22. A treeless land with long summer days and short periods of winter sunlight
26. coastal body of water, surrounded by land in which freshwater and saltwater mix