chapter 6 sections 6.3 and 6.4 stability in the ecosystem
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Chapter 6 Sections 6.3 and 6.4 Stability in the Ecosystem. Stability. The measure of how easily an ecosystem is affected by a disturbance and how quickly it returns to its original condition after a disturbance. Equilibrium. Is a state of balance. - PowerPoint PPT PresentationTRANSCRIPT
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Chapter 6Sections 6.3 and 6.4
Stability in the Ecosystem
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Stability• The measure of how easily an ecosystem is
affected by a disturbance and how quickly it returns to its original condition after a disturbance.
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Equilibrium
• Is a state of balance.• The disrupted ecosystem will return
to this state of balance or equilibrium.
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Disrupted Ecosystem
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Natural Rule
• Species and whole ecosystems evolve and may die out, but new species and ecosystems can evolve to replace them.
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Chaos Theory• Suggests that ecosystems
may be sensitive to very small changes, and that the initial state of an ecosystem is crucial to its later development.
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Human Impacts• Habitat destruction.• Introduction of invasive
species.• Pollution of water, soil
and air.
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Section 6.4Land Biomes
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Biome• A major type of
ecosystem with distinctive temperature, rainfall, and organisms.
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Biomes
• 8 Terrestrial • Aquatic
–Determined by water depth, nutrients, and nearness to land.
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Desert Biome
• Very little water.• Covers 25 % of Earth’s
land surface.
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Desert
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Tundra
•Little water.•Cold.
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Tundra
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Forest Biomes
•Coniferous•Deciduous•Rain forest
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Coniferous Forest
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Deciduous Forest
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Rain Forest
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Grassland Biomes
•Steppe•Prairie•Savanna
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Steppe
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Prairie
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Savanna
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Review• What are some of the human
impacts on the environment?• Compare and contrast the
three different types of forests.