Symbiosis

1
Symbiosis
2

• Populations that live in close physical contact
  with each other interact in a variety of ways.

3
What kinds of relationships?

• Transfer of energy or food.
• Protection
• transportation
• support.

4
Types of relationships

• There are three major types of symbiotic
  relationships. They are classified according to
  how one species is affected by the other.

5
Commensalism

• one organism benefits while the other organism is
  unaffected

6
Commensalism

• An example of commensalism is the relationship
  between trees and flowers called orchids.

7
Commensalism

• a whale transports attached barnacles throughout
  the ocean. The whales are not affected by the
  bamacles.

8
Mutualism

• both organisms benefit

9
Mutualism

• Lichen - alga and fungus.
• Together these organisms live as one.
• The alga supplies the fungus with sugar, other
  nutrients, and water.
• The fungus protects the alga from intense
  sunlight and temperature extremes.

10
Mutualism

• Butterfly fish

• Clown fish protect anemones from butterfly fish,
  while the anemones poison protects clownfish

11
Mutualism

• Ants and aphids
• Ants protect and shelter aphid eggs.
• Aphids provide food inn the form of liquid nectar
  for the ants.

12
(No Transcript)
13
(No Transcript)
14
Parasitism

• one organism benefits and the other is harmed

15
Parasitism

• A parasite uses its host as a source of food.
• Usually the parasite does not kill its host.
• However, the parasite may weaken or sicken the
  host.

16
Parasitism

• Some parasites live outside the body of the
  host.
• Fleas, ticks, lice, and mites are examples of
  external parasites.

17
Parasitism

• Many parasitic bacteria cause disease.
  Tuberculosis, for example, is a respiratory
  disease caused by parasitic bacteria.