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Ecology Note Cards

Ecology Note Cards

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  • 1. Ecosystems Biology I Factoids
  • 2. Factoid 256
    • Section 15
    • An ecosystem is made up of communities and their environments.
  • 3. Factoid 257
    • Producers (autotrophs) make their own food.
  • 4. Factoid 258
    • Consumers (heterotrophs) get their energy by eating autotrophs (producers) or by eating other heterotrophs (consumers).
  • 5. Factoid 259
    • Primary consumers eat producers. Energy is transferred from the producers to the primary consumers. Primary consumers are herbivores.
  • 6. Factoid 260
    • Secondary consumers eat primary consumers. Energy is transferred when one organism eats another.
  • 7. Factoid 261
    • Decomposers break down dead organisms into detritus (organic matter).
  • 8. Factoid 262
    • A food chain is a series of feeding relationships starting with a producer.
  • 9. Factoid 263
    • A food web is a series of overlapping food chains.
  • 10. Factoid 264
    • The trophic level is a feeding level. Every step of a food chain is a trophic level.
  • 11. Factoid 265
    • An energy pyramid shows the energy that is transferred between trophic levels.
  • 12. Factoid 266
    • Only about 10% of the energy at each level is transferred to the next higher level. The rest is used by the organism itself and some is lost as heat.
  • 13. Factoid 267
    • Since only 10% of energy is transferred from one level to another, a food chain usually only has 4 or 5 trophic levels.
  • 14. Factoid 268
    • Biomass is the mass of dry organic materials in an organism.
  • 15. Factoid 269
    • A biomass pyramid indicates the amount of organic material at a given trophic level. Typically producers have the largest biomass.
  • 16. Factoid 270
    • A pyramid of numbers shows the approximate number of individual organisms at each level that an ecosystem can support.
  • 17. Factoid 271
    • The biosphere is all living things on the planet. The biosphere is divided into biomes.
  • 18. Factoid 272
    • Since matter can not be created or destroyed according to the Law of Conservation of Mass, it must be recycled in the environment.
  • 19. Factoid 273
    • The Water Cycle
  • 20. Factoid 274
    • Transpiration is the evaporation of water through the plant.
  • 21. Factoid 275
    • The Carbon-Oxygen Cycle
  • 22. Factoid 276
    • The Nitrogen Cycle
  • 23. Factoid 277
    • Nitrogen fixation is accomplished by bacteria and lightning.
    • Denitrification is accomplished by bacteria.
  • 24. Factoid 278
    • The Phosphorus Cycle