Ecosystems and Biomes. Lesson 1 Cycles in Ecosystem Water cycle- continuous movement of water...
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Transcript of Ecosystems and Biomes. Lesson 1 Cycles in Ecosystem Water cycle- continuous movement of water...
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Ecosystems and Biomes
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Lesson 1 Cycles in EcosystemWater cycle- continuous movement of water
between Earth’s surface and the air, changing from liquid to gas to liquid
Evaporation- is the changing of a liquid into a gascondensation-changing of a gas into a liquidPrecipitation- is any form of water that falls from
the atmosphere and reaches the ground, such as rain,
sleet, snow, or hailRunoff- precipitation that flows across the land’s
surface and is not absorbed will flow into rivers, lakes, and streams
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Water Cycle
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Lesson 1 ContinuedCarbon cycle-the continuous exchange of carbon
among livings thingsNitrogen cycle- the continuous trapping of nitrogen
gas into compounds into soil and its return to the air
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Lesson 2 Changes in EcosystemsExtinct species-when the last member of a
species diesEndangered species- when a species is in danger
of becoming extinctThreatened species-species with low numbers
that could become endangered
Quagga: half zebra, half horse (extinct since 1883)
Thylacine: the Tasmanian Tiger
(extinct since 1936) Tyrannosaurus Rex
(extinct 65 million years ago)EXTINCTSPECIES
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ENDANGERED SPECIES
THREATENEDSPECIES
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Continued Lesson 2Pioneer community- along with microorganisms,
the pioneer species make up this community. The first living community in an otherwise lifeless area ( for example-lichens and mosses)
Climax community- is the final stage of succession (trees)
Primary Succession- a community where few, if any, living things exist, or where earlier communities were wiped out
Pioneer communityIntermediateCommunity
Climax Community
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Lesson 2 continued…
Secondary succession- is the beginning of a new community where a community had already existed
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Desert
TundraTaiga
Tropical Rain Forest
Grasslands Deciduous Forest
Lesson 3: 6 major land biomes
Biome- is one of Earth’s major land ecosystems with its own characteristic animals, plants, soil, and climate
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Lesson 3: Biomes continued…
Desert- a sandy, rocky biome, with little precipitation and little plant life, the main characteristic of a desert is lack of water
*Desert animals: kangaroos rats, lizards, and other reptiles
Tundra- a large treeless biome where the ground is frozen all year
*Tundra animals: caribou, polar bears, musk ox, arctic hares, and foxes
lizardArctic hare
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Lesson 3 continued…Taiga- a cool forest biome of conifers
found in the northern regions*taiga animals: snowshoe rabbit and wolverines
Grassland-a biome where grasses, not trees, are the main plant life, prairies are one kind of grassland. The African grassland is called the savanna.
*grassland animals: insects, toads, worms, mice, and prairie dogs
Wolverine Prairie dogs
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Lesson 3 Continued…Rain forest- a hot, humid biome near the
equator, with heavy rainfall and a wide variety of life
• Rainforest animals- insects, frogs, monkeys, bats, snakes
• Deciduous Forest- a forest biome with four distinct seasons and deciduous tress
• Deciduous animals- birds, squirrels, rabbits, raccoons, skunks, owls
Monkey
squirrel
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Lesson 4: Water Ecosystems
Organisms in the water are divided into three main categories; plankton, nekton, and benthos
nekton-an organisms that live in the water, nekton is the second group which includes the larger, active swimmers in a body of water. Fish, turtles, and whales are nekton.
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Lesson 4 continued…bathyal zone: home to large consumers like
sharks and squid abyssal zone: dark and cold because the sunlight
is completely blocked
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Lesson 4 continuedOcean Ecosystem Zones:intertidal zone: shallowest part of the
ocean ecosystemneritic zone: zone after intertidal-algae
and kelp grow here
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Lesson 4 continued…
estuary- the boundary where the fresh water feeds into the salt water