Presentation on theme: "The Biosphere Vocabulary Ecology Biosphere Species Population Community Ecosystem Biome Producer Consumer Autotroph Heterotroph Decomposer Food Chain."— Presentation transcript:
Producers or Autotrophs Use sunlight or chemicals to make their own food. Examples:
Photosynthesis 6CO 2 + 6H 2 O C 6 H 12 O 6 + 6O 2 Performed on land by plants and in water by algae.
Can organisms make their own food without the aid of sunlight? Chemosynthesis: using chemical energy to make carbohydrates. Usually performed bacteria found in harsh environments –Ocean vents, volcanoes, hot-acidic environments
Consumers or heterotrophs: Must get their energy by eating other organisms HerbivoresOmnivores Decomposers CarnivoresDetritivores HerbivoresOmnivores Decomposers CarnivoresDetritivores
Nitrogen Cycle All organisms need nitrogen to live. Most abundant gas in atmosphere (80%) Nitrogen gas is unusable for plants Must be “fixed” or changed into the nitrate or nitrite form by bacteria in the soil. Known as nitrogen fixation