Transcript Biome Notes - Tuslaw Local School District

State Standards
• 7th Grade Life 3 Explain how the number of organisms an
•
ecosystem can support depends on adequate biotic (living)
resources (e.g., plants, animals) and abiotic (non-living)
resources (e.g., light, water, soil).
7th – Life 5. Explain that some environmental changes occur
slowly while others occur rapidly (e.g. forest and pond
succession, fires and decomposition)
Learning Objectives
• The students will be able to define a biome
and ecosystem.
• The students will be able to identify the 8
major biomes.
Quick Write
QW #10:What is an ecosystem/
biome?
Ecosystems/ Biomes
• Ecosystems = A system of interacting
organisms and nonliving factors in a specified
area
• Biome = is a group of ecosystems with similar
climates and organisms
• Biodiversity = the number of different species
in an area
Biodiversity
• There are three areas that affect biodiversity in an
ecosystem include area, climate, and diversity of
niches
 #1 Area
• The greater the area the more organisms
 #2 Climate
• The average weather conditions over a period of time
 #3 Niches/ Habitats
• Coral Reefs make us less than 1 percent of the worlds oceans but
contain 20 percent of the worlds saltwater fish
Biome
• Keystone Species = a species that influences
the survival of many other species
Desert
• hot and dry, less than 25cm of annual
precipitation (cactus and gila monster)
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Grasslands
• warm temperatures and 25cm-75cm of annual
precipitation
• grasses, a few trees
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decompressor
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Deciduous Forest
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Temperatures vary throughout the year
trees lose their leaves
with at least 50cm of annual precipitation
white tail deer, black bear, squirrel, oak tree
and maple trees
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decompressor
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Boreal Forest Biomes (Coniferous Forest)
• very cold winters and moderate summers
• spruce and firs trees, deer, elk, wolverines
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decompressor
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decompressor
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Quic kT ime™ and a
dec ompress or
are needed to s ee this pi cture.
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QuickTime™ and a
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Tropical Rain Forest
• Very warm, humid, lots of precipitation,
millions of organisms
• 300cm + of annual precipitation
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decompressor
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decompressor
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Tundra
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• extremely cold and dry weather, it has no more
rain than a desert biome, there is a permafrost
• lichens, shrubs, grasses, dwarf trees, wolves,
caribou, fox, hares
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decompressor
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Freshwater Biomes
• free of salt
• ponds, lakes, rivers and streams
Marine Biome
• saltwater (oceans)
• estuaries = is found where the freshwater of a river
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and salt water of the ocean meet
Ocean zone (4)=
• Intertidal zone = along the rocky shore, closest to the beach, sections
between high tide and low tide
• Neritic Zone = just below low tide and extends over the continental
shelf
• Deep Zone = water is completely dark, bizarre-organisms
• Surface Zone = in the open waters, it is measured by the amount of
visible light
Mountains and Ice
• these do not fall into any of the major land
biomes
Ways Organisms Travel
• Dispersal = the movement of organisms from
one place to another (3 ways; wind, water and
other organisms)
• Continental Drift = the very slow movement of
the continents