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KEY CONCEPT Every ecosystem includes both living and nonliving factors.

KEY CONCEPT Every ecosystem includes both living and nonliving factors. plants. An ecosystem includes both biotic and abiotic factors. Biotic factors are living things. plants animals fungi bacteria. moisture temperature wind sunlight soil. Abiotic factors are nonliving things.

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KEY CONCEPT Every ecosystem includes both living and nonliving factors.

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  1. KEY CONCEPT Every ecosystem includes both living and nonliving factors.

  2. plants An ecosystem includes both biotic and abiotic factors. • Biotic factors are living things. • plants • animals • fungi • bacteria

  3. moisture • temperature • wind • sunlight • soil • Abiotic factors are nonliving things.

  4. Changing one factor in an ecosystem can affect many other factors. • Biodiversity is the assortment, or variety, of living things in an ecosystem.

  5. Tropical rainforests have the highest level of biodiversity.

  6. keystone • A keystone species is an organism that links many other species together. This species that has an unusually large effect on its ecosystem

  7. Salmon are keystone species in the temperate rainforest. • Critical fall food source for the grizzly bear, wolves, eagles and otters. • Act as fertilizer for the trees.

  8. light energy 6H2O + 6CO2 ----------> C6H12O6+ 6O2 6CO2 + 6H2O + 3H2S ----------> C6H12O6+ 3H2SO4 Sulfide Sulfuric Acid 13.2 Life in an ecosystem requires energy

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