ECOSYSTEMS and

1

• ECOSYSTEMS and
• COMMUNITIES

2
COMMUNITY INTERACTIONS

• Competition
• Compete for resources in order to survive
• Predation
• Predator and prey relationship
• Symbiosis
• Three kinds
• Mutualism
• Commensalism
• Parasitism

3
PREDATION

• Predatordoes the killing
• Hawk
• Preythe organism that is being eaten
• Mouse
• http//www.youtube.com/watch?vQddgWcdwXQQ

4
MUTUALISM

• mutual means both benefits or reciprocal
  relationship
• Mutualismboth benefit, neither are hurt
• Example
• Flowers and bees
• Flowers and bees both benefit Flowers are
  pollinated by bees bees receive nectar that
  flowers produced. Neither are hurt in this
  process

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Mutualism
6
COMMENSALISM

• One organism benefits
• The other is NOT harmed and does NOT benefit
• Example
• Barnacles on a whale
• Barnacles grow and receive nutrients while on the
  whale. The whale is not harmed and does not
  benefit from the barnacles.

7
Commensalism
8
PARASITISM

• One organism benefits
• The other is harmed
• Example
• Tapeworms, fleas, ticks
• Animal is harmed. The tapeworm, flea, or tick
  benefits, receiving nutrients from animals body.

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Parasitism
10
Videos

• Mutualism http//www.youtube.com/watch?vuxVMeLW
  zB_o
• http//www.youtube.com/watch?vzSmL2F1t81Qfeature
  youtu.be

11

• http//www.youtube.com/watch?vyEhujLgu7wM
• http//www.youtube.com/watch?vFOXvLZHe9DM
• http//www.youtube.com/watch?vzSmL2F1t81Qfeature
  youtu.be