Energy Flow Sunlight is the main energy source for life on Earth. Producers = Autotrophs Make their own food. Soda demonstration
Autotrophs Photosynthesis = uses energy from the sun to change carbon dioxide and water into oxygen and energy-rich carbohydrates. Photosynthetic organisms on land = plants In the ocean = algae In salt marshes & tidal flats = cyanobacteria
Autotrophs Some organisms get energy from a different source (not sunlight). These organisms use chemical energy to make energy rich carbohydrates. This is chemosynthesis!! Example: archaebacteria like methanogens get energy from mineral water in undersea vents or hot springs. 4th period
Autotrophs Chemosynthesis = uses chemical energy to make carbohydrates. Chemosynthetic bacteria live in remote places (volcanic vents, deep-ocean floor, hot springs, tidal marshes) http://en.wikipedia.org/wiki/Hydrothermal_vent
What is the difference between photosynthesis and chemosynthesis? ___________________________________
Energy Flow: Consumers Consumers = Heterotrophs Heterotrophs rely on other organisms to get energy and food.
Heterotrophs Herbivores: eat plants (deer, catepillars) Carnivores: eat meat (snakes, dogs) Omnivores: eat plants and meat (bears, humans, crows) Decomposers: break down dead organic matter (earthworms, snails, bacteria, fungi)
What kind of heterotroph is this?
Feeding Relationships Energy flows through an ecosystem in one direction, from the sun or inorganic compounds to autotrophs (producers) and then to various heterotrophs (consumers). 2nd period
Food Chains Energy stored by producers is passed through the ecosystem along a food chain. Food chain = energy is transferred by eating and being eaten.
Food Webs Feeding relationships are more complex than a food chain shows. Food web = feeding relationships in an ecosystem for a network of complex interactions.
What is the difference between a food web and a food chain What is the difference between a food web and a food chain? What is the difference between the way matter and energy move through the ecosystem?
Identify each member as: Producer, Autotroph, Primary consumer, Secondary consumer, decomposer
Identify each member as: Producer, Autotroph, Primary consumer, Secondary consumer, decomposer