Tundra Biome€¦ · Tundra Biome •located above 55 latitude •Soil is permanently frozen -...
Transcript of Tundra Biome€¦ · Tundra Biome •located above 55 latitude •Soil is permanently frozen -...
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Tundra Biome
• located above 55 latitude
• Soil is permanently frozen - permafrost
• short growing season (50-60 days)
• few year-round animals, many hibernate or
migrate (i.e., Musk Ox, Caribou, Reindeer, Polar
Bear, Snowshoe Hare, Artic Fox, Whales,
mosquitoes and insects common)
• about 1,700 plants – mostly low growing mosses
and lichens (i.e., Reindeer moss)
• few tall trees because roots can not penetrate
permafrost
• precipitation limited to 10 in/year
• temperature ranges from -18F to 60F
• historically a place where valuable minerals can be
found – gold, silver, oil – also trees
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Taiga Biome
• located geographically below the Tundra
• needle-bearing trees (Pine, Spruce, Fir, Hemlock) –
needles covered in wax to prevent water loss
• shed some needles in winter but retain needle
through winter so they can start growing soon in
the spring
• trees tend to grow in thick stands
• heavy snow fall in winter
• home to many migratory species of birds
• animals include fur bearers – mink, Lynx, grizzly
and black bears, Elk, Moose, Owls
• thin, rocky soils but susceptible to forest fires
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Deciduous Forests Biome
• located in the middle latitudes around the planet
• 30-60 in. of precipitation/year
• 4 distinct seasons
• trees include Oak, Beech, Maple, Elm, Walnut,
Basswood, Hickory, Chestnut – valuable woods to
humans for construction and industry
• lots of understory plants and animals (i.e., White
Tailed Deer, Virginia Blue Bells, Hepatica; Blood
Root, Ginseng) –many named by early settlers
• many plants used by humans for food, fiber and
medicine
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Trout Lilly
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Dutchman’s Breeches
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Wild Columbine or Crane’s Bill
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Hawk Weed
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Indian Paintbrush
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Fawn
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Ginseng
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Ginseng Roots
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Desert Biome
• can be hot or cold
• precipitation limited to 10 in/year or less
• many plants exist as seeds for most of the year –
waiting for rain or moisture
• many plants are allelopathic – produce chemicals
that inhibit germination of nearby seeds
• leaves often reduced in size or to spines to reduce
water loss
• animals produce dry or no urine
• many animals jump or leap to avoid hot sand
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Allelopathy
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Grassland Biome (aka Prairie, Steppes, Pampas)
• deep, rich soils – up to12 feet
• more rainfall than a desert
• 10-30 in of rainfall/year
• wide variety of plants and animals; tall and short
grasses, many flowers
• animals tend to live in groups and follow the rain -
American Bison (aka Buffalo), Prairie Dogs,
Prairie Chickens, also lots of scavengers like
Vultures, foxes, wolves
• place of great wealth for farming
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Grassland Biome (aka Prairie, Steppes, Pampas)
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Prairie Chicken
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Grassland Biome (aka Prairie, Steppes, Pampas)
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Rain Forest Biome
• located near the equator
• 70+in. rain/year
• high humidity, high temperature; wet and dry
seasons
• largest number of plant and animal species of any
biome
• plants exist in layers, flowers brightly colored –
emergent, canopy, understory, forest floor
• many animals brightly colored and poisonous
• soils are poor – nutrients leached out by high rain
fall but stored in living plants and animals
• source for many modern medicines and spices –
coffee, quinine, digitalis
• source for minerals such as oil, sulfur, and gold
and gems
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Oceans Biome - ??
• many oceans, all connected physically and by
currents
• salt concentrations from shallow to deep and top to
bottom
• lots of plankton and zooplankton – primary
producers
• many invertebrate animals, also fish and whales
• water pressure limits life forms – no external shells
• plant life limited to top 200 feet or so
• hydrothermal vents (1977) – use sulfur as a source
of energy instead of carbon, may be like living
systems on other planets like Jupiter
• historically a vast source of food for humans
• the avenue of transportation for humans for most
of history
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Urban Biome
• concrete instead of soil
• climate created by tall building
• few plants communities, mostly non-native
species
• most common animals are pests– rats, raccoons,
deer
• lots of undesirable social interactions among
human occupants