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Food Chains and Food Webs

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What is a food chain? A food chain is series of step in which organisms transfer energy by eating and being eaten. What is a producer? An organism that creates it s ... – PowerPoint PPT presentation

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Title: Food Chains and Food Webs


1
Food Chains and Food Webs
2
(No Transcript)
3
What is a food chain?
  • A food chain is series of step in which organisms
    transfer energy by eating and being eaten.

4
What is a producer?
  • An organism that creates its own food through
    photosynthesis
  • What can you think of that might be the most
    common energy source for all producers?
  • The SUN

5
Important facts about food chains
  • In a food chain, each organism obtains energy
    from the one at the level below.
  • Plants are called producers because they create
    their own food through photosynthesis
  • Animals are consumers because they cannot create
    their own food, they must eat (consume) plants or
    other animals to get the energy they need.

6
HeterotrophConsumers Acquire energy from other
organisms AutotrophProducers Convert Light
Energy to Chemical Energy
7
Primary Producers
  • Primary producers are organisms capable of
    producing their own food
  • We can also say that they are photosynthetic, use
    light energy.
  • Examples of primary producers include algae,
    phytoplankton, and large plants.
  • Primary producers are eaten by primary consumers
    (herbivores)

http//i.ehow.com/images/GlobalPhoto/Articles/4729
527/sun-plant_Full.jpg
8
Primary Producers in the aquatic environment
Cyanobacterium Prochlorococcus ?
Phytoplankton ?
http//www.microscopy-uk.org.uk/mag/imgsep03/013.j
pg
9
Click Here to video on Phytoplankton
10
Four types of consumer
  • Herbivores animals that eat only plants
  • Carnivores animals that eat only other animals
  • Omnivores animals that eat animals and plants
  • Detritivores Animals that eat dead materials
    and organic wastes (aka decomposers)
  • Detritus waste and remains of dead organism.

11
http//www.sheppardsoftware.com/content/animals/ki
dscorner/animaldiet/herbivore.htm
12
http//www.sheppardsoftware.com/content/animals/ki
dscorner/animaldiet/carnivore.htm
13
http//www.sheppardsoftware.com/content/animals/ki
dscorner/animaldiet/omnivore.htm
14
http//www.sheppardsoftware.com/content/animals/ki
dscorner/foodchain/decomposers.htm
15
Scavengers
  • Are animals that consume the carcasses of other
    animals that have been killed by predators or
    have died of other causes.
  • Click here to watch a mini clip on scavengers

16
Compost
  • Composting is a natural process that takes
    organic materials into a dark rich substance.
  • Compost is a mixture of decaying organic matter.
  • This substance called compost is wonderful
    conditioner for your soil such as leaves,
    shredded newspaper, fruits and vegetables, grass
    clippings, sawdust and wood chips.

17
Other Ways to Classify Consumers
  1. Primary Consumers Herbivores
  2. Secondary Consumers Carnivores that eat
    herbivores
  3. Tertiary Consumers Carnivores that eat other
    carnivores

18
What is a food web?
A food web is an interlocking pattern of food
chains2
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