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13 Cards in this Set

  • Front
  • Back
Primary Succession
succession that occurs in an area in which no trace of a previous community is present.
Secondary Succession
type of succession that occurs in an area that was only partially destroyed by disturbances.
Canopy
dense covering formed by the leafy tops of tall rain forest trees.
Understory
layer in a rain forest found underneath the canopy formed by shorter trees and vines.
Deciduous
term used to refer to a type of tree that sheds its leaves during a particular season each year.
Coniferous
term used to refer to trees that produce seed-bearing cones and have thin leaves shaped like needles.
Humus
material formed from decaying leaves and other organic matter.
Taiga
biome with long cold winters and a few months of warm weather; dominated by coniferous evergreens; also called boreal forest.
Permafrost
layer of permanently frozen subsoil found in the tundra.
Photic Zone
sunlight region near the surface of water.
Aphotic Zone
dark layer of the oceans below the photic zone where sunlight does not penetrate.
Wetland
ecosystem in which water either covers the soil or is present at or near the surface for at least part of the year.
Estuary
kind of wetland formed where a river meets the ocean