Hw 1. How does the greenhouse effect maintain the biosphere’s temperature range? And, how has it...
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Hw1. How does the greenhouse effect maintain the
biosphere’s temperature range? And, how has it effected Earth’s 3 main climate zones?
2. Describe ecological succession and how biotic and abiotic factors influence an ecosystem.
3. What interactions occur within communities?
Period 1:Lab – Thurs. Oct 16th Quiz – Mon. Oct. 20th Test – Wed. Oct. 22nd
Period 4:Lab – Thurs. Oct 16th Quiz – Mon. Oct. 20th Test – Wed. Oct. 22nd
Period 7:Lab – Fri. Oct. 17th Quiz – Tues. Oct. 21st Test – Thurs. Oct. 23rd
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Climate?
Greenhouse Effect?
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Three Main Climate Zones
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Biosphere• Part of the Earth in which life exists
Ecology is the study of….• Interactions of organisms with one another• And with their physical environment
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Ecosystem consist…• Physical features (abiotic factors)• Living Organisms (biotic factors)
Community• Organisms living together in an
ecosystem
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process through which an existing community is gradually replaced by another community
relatively stable collection of plants and animals that results from ecological succession
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A Biome ….• is an environment that has a characteristic
climax community. Most land biomes
• are named for their climax community, • or the dominant type of plant life
Major land biomes …• tundra, taiga, temperate deciduous forest, grassland,
tropical rain forest, and desert.
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Sahara in Africa - the world's largest desert • rain almost never falls• and the wind is hot and dry. • almost nothing grows• the landscape looks as barren as the
surface of the moon.
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some rainfall Rapidly growing plants grow, flower, fruit, and become
dormant until the next rainfall
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rainfall is more even sagebrush, cacti, and only a few
types of trees survive• home to many species of lizards, insects,
scorpions, snakes, and birds.
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mountains and plateaus high altitudes cause a decrease in
temperature brief rainy season that permits the
growth of grasses and shrubs
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Northern North America, Asia, and Europe northernmost land biome. nearly treeless covered by mosses, lichens, and grasses. Many animals migrate during the summer to feed
on the plants that grow there. Caribou and reindeer are two examples. In turn,
wolves, foxes, and hordes of mosquitoes feed on these animals.
many birds spend summer here, then fly south in early autumn.
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The most characteristic feature is permafrost,
layer of permanently frozen subsoil. • summer -the ground thaws to a depth of a few
centimeters becomes soggy and wet;
• winter it freezes again. • This cycle rips and crushes plant roots,• keeping the plants small and stunted.
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South of the tundra great coniferous, or cone-bearing, forests of fir, pine,
and spruce. North America and Asia, with a narrow band reaching
into Norway and Sweden (in Europe). rises to the higher elevations of many mountain
ranges in the United States, including the Rocky and Appalachian mountains. The taiga also extends along the coasts of Washington, Oregon, and northern California, where it is home to the giant redwoods - some of the tallest trees in the world. Redwoods can reach heights of more than 60 meters.
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winters are cold, summers are mild allow many animals and plants to reproduce. Many rivers, ponds, lakes, and bogs provide
homes for small birds and mammals either hibernate or move to warmer regions
during the long, cold winters. Typical inhabitants
• black bears, grizzlies, wolves, moose, elk, and dozens of smaller animals such as voles, wolverines, and grouse.
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eastern coast of the United States, the southern coast of Canada, most of Europe, and parts of Japan, China, and Australia
forests of oak, maple, beech, and birch trees that are deciduous, or shed their
leaves in autumn. rainfall is sufficient year round, cold winters
halt plant growth for several months. striking seasonal changes..
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a great number of animals once inhabited these forests• hunted to near extinction. • careful protection and hunting regulations,
deer, moose, gray foxes, and several other species are beginning to reappear.
• An enormous variety of birds spend their summers in this biome, and chipmunks, raccoons, opossums, and squirrels make it their permanent home.
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organic matter and nutrients are stored in a layer of decaying leaves and twigs called humus (HYOO-muhs).
these forests make good farmland. encouraged human activities
• greatly altered the biome. For example, forest land in New England was cleared of trees and used for farming. Fortunately, much of the original deciduous forest has since recovered.
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found in the interior portions of many continents
grasslands are vast areas covered with grasses and small leafy plants.
rainfall (25 to 75 centimeters per year), most of it falls in one season.
include the plains and prairies of North America, the steppes of Russia, the veld of South Africa, and the pampas of Argentina.
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hot summers and cold winters. tropical grasslands - little seasonal change
in temperature. • wet to very dry. • groves of trees, are called savannas.
do not undergo ecological succession because of the grazing of large animals
and periodic fires. • Serengeti grasslands of Africa, impala, gazelles,
wildebeests, and elephants graze.
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Wheat, corn, and other grains are heavily farmed in the
rich soils of temperate grasslands can support farming for many years.
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temperature stays warm rain falls year round receive 200 to 400 centimeters of
rainfall each year. constant at about 25°C covers large areas of South America,
Southeast Asia, Africa, and Central America.
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home to more species of plants and animals than can be found in all the rest of the land biomes combined!
trees grow to a height of 70 meters, and their tops form a dense covering called a canopy.
Animal life in the rain forests is rich and varied. • Colorful insects and birds are particularly
abundant. Reptiles, small mammals, and amphibians are common inhabitants of this biome.
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Many of the animals and plants that inhabit the rain forests produce chemicals that may be useful in fighting some types of diseases.
rain forests are being destroyed by the rapid growth of the human population. • If the destruction continues at its present rate,
almost all of the tropical rain forests will disappear by the end of this century! Along with the rain forests will go thousands of plant and animal species found only in this fascinating biome.
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1. Tropical Rain Forest2. Tropical Dry Forest3. Tropical Savanna4. Desert5. Temperate Grassland6. Temperate Woodland & Shrub7. Temperate Forest8. Northwestern Coniferous Forest9. Boreal Forest10. Tundra