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Interdepedence

Explore the interdependence of organisms and their environment through chemical cycles and energy transfer in ecosystems. Learn about the water cycle, carbon cycle, and how energy flows through food chains and food webs. Discover the importance of producers, consumers, and decomposers in maintaining balance in ecosystems.

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Interdepedence

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Presentation Transcript

  1. Interdepedence • We rely on and interact with our environment and everything in it.

  2. Ecosystem Recycling

  3. The Water Cycle

  4. The Carbon Cycle

  5. Avatar: Chemical Cycles Watch Avatar and then complete your lab over chemical cycles.

  6. Owl Pellet • What did the owl pellets teach us about what the owl ate? • What did those animals do for food? • Is anybody eating the owl?

  7. Put it all together…

  8. FOOD CHAIN FOOD WEB

  9. Food Chains and Food Webs Food Chain Food Web Interrelated food chains in an ecosystem • A single pathway of feeding relationships

  10. ENERGY So, if all life in earth gets its energy from the sun, then how do we actually receive that energy?

  11. Producers • Any organism that makes its own food • Photosynthesis and Chemosynthesis • Production of organic compounds or biomass

  12. Consumers • Any organism that can’t make its own food • Herbivores • Carnivores • Omnivores • Detritivores • Decomposers

  13. Energy Transfer In an ecosystem, energy flows from the sun to autotrophs, then to the organisms that eat the autotrophs, and then to organsisms that feed on other organisms.

  14. Trophic Level • Indicates the organism’s position in a sequence of energy transfers

  15. Energy Transfer • Only 10 % of energy is passed on to the next trophic level.

  16. Tertiary consumers 10 kcal Secondary consumers 100 kcal Primary consumers 1,000 kcal Producers 10,000 kcal 1,000,000 kcal of sunlight

  17. Why so low? • Some organisms escape being eaten • Energy used by the prey for cellular respiration cannot be used by the predator to make new biomass • Parts of the organism/prey can’t be consumed by the predator • No transfer of energy is 100% efficient

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