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10.4/Biomes
Different biomes and ecological succession
16
05/30/2011

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Term
Small to Big
Definition
• Cell  tissue  organ  organism  population  community  ecosystem  biome  biosphere
Term
Biome
Definition
• Large geographic area that is characterized by a predominant type of vegetation
• Vegetation depends on abiotic factors
• Contains several ecosystems
• Most are terrestrial, some are aquatic
• Not clear-cut—gradual changes from biome to biome
Term
Biosphere
Definition
• All the terrestrial and aquatic biomes—entire portion of Earth inhabited by life
Term
Ecological Succession
Definition
• Introduction of pioneer organisms into a disturbed environment after a disaster
• These organisms are replaced by other species, then are replaced by other species again
Term
Pioneer Organisms
Definition
• First organisms to inhabit a barren landscape during ecological succession
• Often lichen are pioneer organisms
Term
Climax Community
Definition
• Final organisms that appear during ecological succession
• Stable unless there is another disaster
Term
Tropical Rain Forest
Definition
• Terrestrial biome found along equator
• Most rainy biome on earth, warm temperature year round, little sunlight filters to the ground
• Life thrives! Monkeys, birds, lizards, snaks, orchids, vines, broadleaf trees
Term
Savanna/Grassland
Definition
• Terrestrial biome found along equator
• Seasonal rainfall—droughts can last 8 to 9 months, mild temperatures
• Mostly grasses and wimpy trees for vegetation; zebras, lions, hyenas, elephants, giraffes
Term
Desert
Definition
• Farther from equator than tropical rain forest/savanna
• Smallest annual amount of rainfall, huge temperature fluctuation
• Mostly cacti for plants; snakes, lizards, scorpions for animals
Term
Chaparral
Definition
• Wild west kind of biome
• Dry and warm summers, rest of seasons are cool, rainy winters
• Trees, shrubs, deer, goats, amphibians, reptiles, birds
Term
Temperate Forest
Definition
• Almost as much rain as troopical rain forest, cool autums, cold winters
• Not too much diversity of life: broadleaf trees like oaks, maples, chestnuts, hockories; animals like deer, squirrels, black bears, beavers, raccoons
Term
Coniferous Forest/Taiga
Definition
• Rainy, almost as much as tropical rain forest
• Cold winters  not much plant life: cone-bearing trees like pines, firs, hemlocks; animals like bears, wolves, moose
Term
Tundra
Definition
• Really cold—frozen topsoil
• Few plants, they’re small; many animals (caribou!) migrate south for winter
Term
Antarctic
Definition
• Only place on earth with no biome :(
Term
Freshwater Biomes
Definition
• Ponds, lakes, streams, rivers
• Organisms here need to be able to get rid of excess water gained by osmosis
Term
Saltwater Biomes
Definition
• Biggest ones are oceans—most stable ecosystems on Earth
• Salinity and temperature do not fluctuate that much because there’s so much water
• Organisms here need to keep water—the water outside is saltier so it leaves their cells by osmosis