Post on 01-Jan-2016
Food Chains • Food Chain
• What do food chains show?
• What do the arrows represent?
• A series of events in which one organism eats another and obtains energy.
• Food chains show the transfer of energy in an ecosystem
• The arrows represent the transfer of energy.
• What do food chains start with?
• What type of organism is after the sun?
• Describe photosynthesis.
• All Food Chains start with the sun
• After the sun is an organism that can do photosynthesis. Like plants and phytoplankton.
• Sunlight + Carbon Dioxide + Water = Energy This process is called Photosynthesis
• Sample food chains:
• Sun →milkweed → aphid →ladybug →bird → mushroom
• Sun → grass → zebra → lion → vulture
• Sun → seeds → grasshopper→ mouse → hawk
Video Clip
• Producers • An organism that can make its own food . They use carbon dioxide, water and sunlight to make energy, through a process called photosynthesis. Producers are the source of all food in an ecosystem. Without producers there is no food chain.
Phytoplankton
Flowers
Tree
• Decomposers • Organisms that break down wastes and dead organisms and return the raw materials to the environment.
• Two major groups of decomposers are:
– Bacteria
– Fungi.
Decomposer Video Clip
• Consumers
• 3 types of Consumers
• An organism that obtains energy by feeding on other organisms.
• Ex: Deer, Humans, Snakes, Bat, Cat, Hippopotamus, Cricket, Rabbit
• Herbivores, Omnivores and Carnivores
• Food Chain Game
• Sample food chains with energy roles labeled:
• Sun →milkweed → aphid →ladybug
producer 1 consumer 2 consumer
→bird → mushroom 3 consumer Decomposer
• Sun → grass → zebra → lion → vulture
produce 1 consumer 2 consumer 3 con
• Sun → seeds → grasshopper→ mouse →
producer 1 consumer 2 consumer
hawk
3 consumer
Video Clip 2 /Prod/Cons Video
• 3 types of consumers
• Carnivores
• Herbivores, Carnivores, and Omnivores
• Consumers that eat ONLY other consumers.
( Meat -Eaters)
• Ex: T-rex, Tigers, Lions,
Ladybugs, Spiders.
• Herbivores • Herbivores are consumers that eat only producers. (plant eaters)
• Ex: Butterflies, deer,
elephants, giraffes, mice.
• Omnivores • Consumers that eat BOTH consumers and producers. (both meat eaters and plant eaters)
• Ex. Humans, Bearded
Dragons, Turtles, Bears.
• Sample food chains with energy roles labeled:
• Sun →milkweed → aphid →ladybug
producer 1 consumer 2 consumer
herbivore Carnivore
→bird → mushroom 3 consumer Decomposer
Omnivore
• Sun → grass → zebra → lion → vulture
produce 1 consumer 2 con 3 con
herbivore carnivore carnivore
• Food Webs • A Food Webs consists of many overlapping food chains in an ecosystem.
• It better represents the transfer of energy than a food chain.
• Energy Pyramid • An Energy Pyramid shows the amount of energy that moves from one feeding level to another in a food web. The most energy is at the producer level. At each level there is less available energy.
• Energy Pyramid Video Clip