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Biome
| Term | Definition |
|---|---|
| biome | a complex of terrestrial communities that covers a large area and is characterized by certain soil and climate conditions and particular assemblages of plants and animals |
| tolerance | ability to survive and reproduce under conditions that differ from their optimal conditions |
| microclimate | the climate in a small area that differs from the climate around it |
| canopy | dense covering of the leafy tops of tall rain trees |
| understory | layer in a rain forest formed by shorter trees and vines |
| deciduous | term used to describe a tree that sheds its leaves during a particular season each year |
| coniferous | term used to describe tees that produce seed-bearing cones |
| humus | a material formed from decaying leaves and other organic matter that makes soil fertile |
| taiga | also known as boreal forests; biomes characterized by dense evergreen forests of coniferous trees |
| permafrost | a layer of permanently frozen subsoil |