mutualism both species benefit “+ +” relationship examples – ants protect aphids that provide...
TRANSCRIPT
Ecological Interactions
Unit 6-1 NotesMr. Hefti – Pulaski Biology
Mutualism• Both species benefit• “+ +” relationship• Examples–Ants protect aphids that
provide them food–Clown fish / sea anemones
Predation
• Predator – hunter• Prey – hunted• “+ -”• Examples–Wolf hunts rabbits–Bear / salmon
Parasitism• Organism lives on or near another
causing harm• Host provides resources to parasite• “+ -”• Examples–Fleas / larger mammals–Tapeworms in intestines of large
mammals
Competition
• Organisms use same resources• “+ -”• Examples–Birds feeding on same foods–Mountain goats attracting mates
Commensalism
• One benefits / other not affected• “+ 0” • Examples–Orchids living on trees in
tropical forests–Barnacles on whales
See if you can identify the ecological
interactions and the +, -, or 0 relationships
shown in the following pictures…
1
2
3
4
5
Answers
• 1 – Parasitism (+-)• 2 – Mutualism (++)• 3 – Competition (+-)• 4 – Commensalism (+0)• 5 – Predation (+-)