3 2 major components of an ecosystem


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3 2 major components of an ecosystem

  1. 1.  Some organisms produce thenutrients they need, others getthe nutrients they need byconsuming other organisms, andsome recycle nutrients back toproducers by decomposing thewastes and remains of organisms.
  2. 2. Smallest unit of a chemical elementthat exhibits its chemical propertiesAtomMolecule Chemical combination of two ormore atoms of the same or differentelementsCellThe fundamental structural andfunctional unit of lifeOrganism An individual living beingPopulation A group of individuals of the samespecies living in a particular placeCommunity Populations of different speciesliving in a particular place, andpotentially interacting with eachotherStepped ArtEcosystem A community of different speciesinteracting with one another andwith their nonliving environment ofmatter and energyBiosphere Parts of the earths air,water, and soilwhere life is foundFig. 3-4, p. 42
  3. 3.  Abiotic› Water› Air› Nutrients› Solar energy› Rocks› Heat Biotic› Plants› Animals› Microbes› Dead organisms› Waste productsof deadorganisms
  4. 4. Soluble mineralnutrientsProducersDecomposersSecondaryconsumer(fox)Carbon dioxide (CO2)Primaryconsumer(rabbit)ProducerOxygen (O2)PrecipitationWaterFig. 3-5, p. 43
  5. 5.  Producers – (autotrophs) - Make their own food(photosynthesis)› Examples: plants, algae, phytoplankton
  6. 6.  Consumers – (heterotrophs)- Get food byeating other organisms Primary – eats producer or plants only› Called a Herbivore› Examples: deer, cow, caterpillar Secondary – eats primary consumer, or otheranimals.› Called a Carnivore› Examples: spiders, robins, tuna Tertiary – eats a 2nd consumer› Examples: tigers, hawks, killer whales
  7. 7.  Already know Herbivore andCarnivore. Omnivores – eat plants and animals› Ex: people, pigs, bears
  8. 8.  Detrivores -Feed on the waste or deadbodies of organisms› Examples: earthworms, some insects, vultures Decomposers - Consumers that releasenutrients from the dead bodies of plants andanimals› Examples: bacteria and fungi (mushrooms)› Help release nutrients so that they can berecycled› Without them the planet would be overwhelmedby dead bodies, waste and plant litter
  9. 9.  Decomposers - Consumers that releasenutrients from the dead bodies of plants andanimals› Examples: bacteria and fungi (mushrooms)
  10. 10.  Help release nutrients so that they can berecycled Without them the planet would beoverwhelmed by dead bodies, waste andplant litter
  11. 11. Timeprogression Powder broken down bydecomposers into plantnutrients in soilMushroomWoodreducedto powderDry rotfungusTermite andcarpenterant workDecomposersDetritus feedersCarpenterant galleriesBark beetleengravingLong-hornedbeetle holesFig. 3-6, p. 44
  12. 12.  Photosynthesis (done by producers only) Carbon dioxide + water + solar energy glucose +oxygen Aerobic respiration (done by producers andconsumers) Glucose + oxygen  carbon dioxide + water + energy
  13. 13.  Ecosystems sustained through: 1. One-way energy flow from the sunthrough producers to consumers 2. Nutrient recycling
  14. 14. Abiotic chemicals(carbon dioxide,oxygen, nitrogen,minerals)Decomposers(bacteria, fungi)Consumers(herbivores,carnivores)Producers(plants)SolarenergyHeatHeat HeatHeat HeatFig. 3-7, p. 45