organism interactions

Organism interactions

Lesson 2

Mutualism

• a relationship between two species in which both species benefit. 

• In a mutualism, the organisms are called  mutualists .

• The interaction helps both populations grow because both populations benefit

• If another factor, such as disease or an increase in predators, causes one population to shrink, the other population may also shrink as a result.

Commensalism

• Is a relationship between two species in which one species benefits and the other is unaffected. 

• Some interactions between organisms in an ecosystem help one organism and have no effect on the other.

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Parasitism

• a relationship in which one species benefits while the other is harmed but not usually killed. 

•  similar to predation in that one species benefits while the other is harmed. 

•  parasite lives on or in a living organism called a host

• takes small amounts of resources from the host that, over time, can weaken the host.

Predation

• is a relationship in which one organism, the predator, benefits by eating another organism, the prey.

• One pattern scientists have observed in feeding relationships is that predators can be organized into three large categories 

• Carinivores - meat eaters

• Omnivore - eats both plants and meat

• Herbivore - plant eaters

Multiple Choice

What kind of interaction is happening with A kitten has fleas that suck its blood?

• Mutualism

• Parasitism

• Commensalism

• Predation

Poll

What type of Interaction is this?

• Mutualism

• Predation

• Commensalism

• Parasitism

Poll

What type of Interaction is this?

• Mutualism

• Predation

• Commensalism

• Parasitism

Poll

What type of Interaction is this?

• Mutualism

• Predation

• Commensalism

• Parasitism

Poll

What type of interaction is this?

• Mutualism

• Parasitism

• Predation

• Commensalism