Lessons 2

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Lessons 2 3Interactions of Organismsand
Populations
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How are living things organized?

• Organisms
• Populations
• Communities
• Ecosystems
• Biomes

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• A living thing is called an organism.
• Example a deer

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• All of the organisms of the same species that
  live in an area at the same time is called a
  population.
• Example a herd of deer

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• All the populations of all species that live
  in an area is called a community.
• Example deer rabbits bears

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• All the organisms living in an area, as well
  as the non-living parts of their environment, is
  called an ecosystem.
• Example deer rabbits bears water
  temperature sunlight soil air

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• Large geographic areas that have similar
  climates and ecosystems are called biomes.
• Example tundra, taiga, desert, etc.

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• There are different kinds of relationships
  between the organisms in an ecosystem.

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Predator/Prey

• An organism that hunts and eats another organism
  is called a predator.
• The organism that the predator hunts and eats is
  called prey.

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Which one is the predator and which one is the
prey?
zebra
lioness
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Which one is the predator and which one is the
prey?
snake
roadrunner
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Which one is the predator and which one is the
prey?
fish
osprey
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Which one is the predator and which one is the
prey?
fox
hare
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Symbiosis

• Symbiosis is when two organisms live together,
  temporarily or for a longer time, and at least
  one of the organisms benefits from the
  relationship.

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Different kinds of symbiosis
Commensalism

• Parasitism

Mutualism
one organism benefits one organism is harmed -
one organism benefits one organism is
unaffected 0
both organisms benefit

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More about Parasitism

• The organism that benefits in a parasitic
  relationship is called the parasite.
• The organism that is harmed in a parasitic
  relationship is called the host.

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• Identify the type of relationships in the
  following examples

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Mutualism
Moray Eel with Cleaner Fish
Moray Eel gets a clean mouth. Cleaner Fish gets a
meal.
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Cattle with cattle egrets
Cattle stir up insects as they eat grass.Egrets
hang around and eat insects.
Commensalism
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Acacia plant with ant galls
Bull horn acacia trees provide nutrients and
housing for acacia ants. Acacia ants attack
herbivores that try to eat the leaves.
Mutualism
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Clown fish with anemone
Clown fish gets Protection. Anemone is
unaffected.
Commensalism
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Mutualism
Antelope with oxbird
Antelope gets rid of parasites. Oxbird gets a
meal. YouTube - JumpStart Symbiotic Harmony Song
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Taenia worm in human eye
Worm infects human blood stream.Human may go
blind.
Parasitism
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Mr. Lee Symbiosis

• YouTube - Mr. Lee - Symbiosis rap