Class 12b: The biosphere

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Class 12b The biosphere
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Biosphere

• Biogeography
• Ecology

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Ecosystems

• Ecosystems
• Abiotic
• Biotic

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Ecosystems

• Different environmental factors at different
  scales
• Limiting factor

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Limiting factors
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Ecosystem components

• Community
• Habitat

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Ecosystem components

• Niche

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Biogeochemical cycles
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Photosynthesis
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Respiration
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Productivity

• Net primary productivity

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Food chains and pyramids
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Carbon cycle
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Nitrogen cycle
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Ecosystem stability
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Ecosystem stability