Relations between Species Lecture - Relations Between Species Neutralism Species A B Mutualism A B Competition A B Predation A B Parasitism B

Relations between Species Lecture - Relations Between...

This preview shows page 1 - 11 out of 38 pages.

Relations Between Species Neutralism Species A B Mutualism A B Competition A B Predation A B Parasitism A B Commensalism A B Amensalism A B + + _ _ _ + _ + 0 Prey Predator Parasit e Host Host Commensal Most of these interactions influence the evolution of a species O O + _
Image of page 1
Neutralism
Image of page 2
Commensalism e.g. Barnacles on whales
Image of page 3
Amensalism Dinoflagellates cause Red Tides
Image of page 4
Mutualism Mutualism= 2 organisms interact where both derive a fitness benefit (increased reproductive output. A B + +
Image of page 5
Types of Mutualistic Relationships 1) Resource-Resource Relationship = resources are exchanged (usually nutrients) e.g. Mycorrhizae = plant roots -- fungi Carbohydrates to fungi & phosphate and nitrogen to plant
Image of page 6
Types of Mutualistic Relationships 1) Resource-Resource Relationship = resources are exchanged (usually nutrients) e.g. Rhizobia bacteria -- plants Bacteria fix nitrogen for leguminous plants and gain carbohydrates from plant
Image of page 7
Types of Mutualistic Relationships 2) Service-- Resource Relationship = Services are exchanged for resources (usually nutrients) e.g. Pollination – nectar or pollen are traded for pollen dispersal e.g. Seed dispersal --squirrels get nuts and nuts are dispersed
Image of page 8
Types of Mutualistic Relationships 3) Service--Service Relationship = Services are exchanged e.g. Sea Anemones and anemone fish Sea anemones protect anemone fish against predators & anemone fish protect anemone against the butterfly fish
Image of page 9
Facultative vs. Obligate Mutualism
Image of page 10
Image of page 11

You've reached the end of your free preview.

Want to read all 38 pages?

  • Fall '14
  • ?
  • Evolution, mutualistic relationships

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes