Symbiotic Relationships

Species interactions

What is symbiosis?

• Long term partnership between members of different species

Types of symbiosis

• Parasitism• Mutualism• Commensalism

• Why not predation?• Why not competition between two

organisms of the same species?

Parasitism

• 1 species benefits, 1 is harmed• +1, -1

Blood Suckers

Lampreys

Mistletoe

Tapeworm

Mutualism

• Both species benefit• +1, +1

Cleaner fish

Insects and Flowers

Aphids and Ants

Birds and Livestock

Lichens

Commensalism

• One species benefits, the other is unaffected

• +1, 0

Barnacles and Whales

Hitch Hiking

Nesting in Trees

Conclusion

• What is symbiosis?• What are the 3 types of symbiotic

relationships?• What is Parasitism?• What is Mutualism?• What is Commensalism?