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8.18 Mrs Jensen
Ecosystems
16
Science
8th Grade
12/29/2011

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Term
ecological succession
Definition
process of gradual change from one community of organisms to another
Term
primary succession
Definition
ecological succession that begins in a place that does not have soil
Term
pioneer community
Definition
first community of organisms to move into a new environment
Term
secondary succession
Definition
ecological succession that begins in a place that already has soil and was once the home of living organisms
Term
climax community
Definition
community that has reached the final stage of ecological succession
Term
biomes
Definition
large geographic areas with similar climates and ecosystems
Term
tundra
Definition
cold, dry, treeless biome located at latitude surrounding the north pole and that has winters six to nine months long
Term
taiga
Definition
cold region of cone-bearing evergreen trees that lies just below the tundra and is the world's largest terrestrial biome
Term
temperate deciduous forest
Definition
biome that lies at latitudes below about 50 degrees in both the northern and southern hemispheres, usually has four distinct seasons, and supports a wide variety of plants and animals
Term
tropical rain forest
Definition
hot, wet, equatorial biome that contains the largest number of species
Term
grasslands
Definition
temperate and tropical regions that receive between 25 cm and 75 cm of precipitation each year and are dominated by climax communities of grasses
Term
desert
Definition
driest biome on Earth, they receive less than 25 cm of rain each year and support little plant life
Term
plankton
Definition
microscopic algae, plants, and other organisms that float in warm, sunlit waters near the surface of freshwater lakes and ponds
Term
estuary
Definition
area where a river meets the ocean that contains a mixture of freshwater and salt water and serves as nursery for many species of ocean fish
Term
intertidal zone
Definition
portion of the shoreline that is covered with water at high tide and exposed to the air at low tide
Term
List the 6 common biomes
Definition
tundra, taiga, temperate forest, tropical rain forest, grassland, and desert
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