Biomes and Communities

2. Region with little to almost no plant life; the driest biome.
4. Any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms.
5. Biome that surrounds the north and south poles; treeless land with long summer days and short periods of winter sunlight.
6. Biome near the equator with warm temperatures, wet weather, and lots of plant growth.
12. Layer of permanently frozen soil that lies under the topsoil of the tundra.
13. Group of ecosystems with the same climax communities.
15. Part of the shore that lies between high tide and low tide lines.

1. A zone that is part of the marine biome and shallow enough for sunlight to reach.
2. Biome made up of forests of broad-leaved hardwood trees that lose their leaves every autumn.
3. Coastal body of water, partly surrounded by land, in which freshwater and saltwater mix.
5. Biome just south of the tundra; contains northern coniferous pine, fir, hemlock, and spruce trees and acidic, mineral-poor topsoil.
7. Orderly, natural changes, and species replacements that take place in ecosystem communities over time.
8. A type of community that is stable with little or no change over time.
9. Biome made up of large communities covered with grasses and similar small plants.
10. Part of the marine biome that is too deep for sunlight to reach.
11. When pioneer organisms move into new land is exposed by avalanches, volcanoes, or glaciers, a ____ succession takes place.
14. _____ succession happens after a community is affected by natural disasters or human activities.