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Ecosystems - PowerPoint PPT Presentation


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Ecosystems. Cloze. Ecosystems. Abiotic factors are non-living. Biotic factors are living. Sunlight is the primary source of energy in ecosystems. 10% of energy is transferred up through trophic levels. The rest of the energy is used up in maintaining the organism and heat .

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PowerPoint Slideshow about 'Ecosystems' - megan


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Ecosystems

  • Abiotic factors are non-living.
  • Bioticfactors are living.
  • Sunlight is the primary source of energy in ecosystems.
  • 10% of energy is transferred up through trophic levels.
  • The rest of the energy is used up in maintaining the organism and heat.
  • Herbivores are primary consumers.
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Ecosystems

  • Consumers on the next level up are called secondary consumers and are omnivores and small carnivores.
  • Tertiary consumers are medium or large carnivores.
  • Quaternary consumers are large carnivores.
  • Larger species populations are found at lower trophic levels. This is as result of the small level of energy that is transferred up from each level.
slide4

Species Interactions

  • Predation has a predator and its prey. One species benefits and one species is harmed.
  • Competition is where species compete for available resources including food and shelter.
  • Mutualism is an interaction where both species benefit.
  • Parasitism is where onespecies benefits and the other is harmed but not killed.
  • Commensalism is when one species benefits and the other species is neither harmed nor benefits.
photosynthesis respiration
Photosynthesis/Respiration
  • Photosynthesis takes in carbon dioxide and waterand produces oxygen and glucose.
  • Cellular respiration uses oxygen and glucose and releases carbon dioxide and water into the atmosphere.