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Day 72

Unit 4: Sustainable Ecosystems. Day 72. 1.1 Sustainability. Easter Islands. Discovered in 1722 Treeless Island After cutting down all trees, loss of trees led to erosion, no materials for making boats or fishing  population began declining.

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Day 72

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  1. Unit 4: Sustainable Ecosystems Day 72 1.1 Sustainability

  2. Easter Islands • Discovered in 1722 • Treeless Island • After cutting down all trees, loss of trees led to erosion, no materials for making boats or fishing  population began declining

  3. Ecosystem: all the interacting parts of a biological community and its environment • Sustainable ecosystem: an ecosystem that is capable of withstanding pressure and giving support (it must endure and support)

  4. Parts of an Ecosystem • Biotic: the living parts of an ecosystem • Abiotic: the non-living parts of an ecosystem

  5. CuPS For Biotic Interactions

  6. SNOWL - for Abiotic For Abiotic Interactions

  7. Cycling of Matter and Earth’s Spheres

  8. Cycling of Matter and Earth’s Spheres • Lithosphere: the hard part of Earth’s surface • Hydrosphere: all the water found on Earth, including lakes oceans and ground water • Atmosphere: the layer of gases above Earth’s surface • Biosphere: the regions of Earth where living organisms exist

  9. Nutrients: a chemical that is essential to living things and is cycled through ecosystems

  10. 4 Types of Nutrient Cycles • Water Cycle • Carbon Cycle • Nitrogen Cycle • Phosphorous Cycle

  11. The Water Cycle: the most vital abiotic part. Condensation, precipitation, evaporation abiotic

  12. The Carbon Cycle • Like water, carbon moves through Earth’s spheres. Carbon dioxide, a gas, moves from atmosphere into the biosphere and back again.CO2 is returned to the atmosphere when humans burn the fossil fuels for energy

  13. The Nitrogen Cycle • Nitrogen: 78% of atmosphere

  14. Terrestrial Ecosystem: a land-based ecosystem • Aquatic Ecosystem: a water-based, either fresh water or salt water, ecosystem

  15. The Phosphorous Cycle • Phosphorous is stored in the lithosphere (rocks and in sediment on ocean floor) • Humans mind for phosphate rock  used to make fertilizers and detergents • Phosphate is absorbed by plants through roots • As decomposers, bacteria break down dead organisms, releasing phosphate back into soil

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