LIVING RELATIONSHIPS

SYMBIOSIS

Other Nutritional Relationships:

• SYMBIOSIS-• Any close relationship

between two organisms of different species

COMMENSALISM• Benefits one organism; the

other organism neither benefits nor is harmed

• This is an example of the cattle egret and a rhinoceros

• The cattle egret feeds off the insects stirred up when the rhino moves.

• The text mentions the red-breasted goose and the peregrine falcon

PARASITISM• Benefits one organism; the

other (host) is harmed• This example is a braconid

wasp which lays its eggs on a tomato hornworm caterpillar.

• The wasp lays its eggs on the hornworm. When they hatch, they digest the hornworm from the inside.

• Other examples are fleas, ticks, tapeworms, nematodes

MUTUALISM• Both organisms benefit• Here, there are ants that

live in the acacia tree.• The acacia tree produces nectar

“gifts” for the ants. In return, the ants protect the tree from any plant-eating insects.

• Another example is the tunneling shrimp and the goby fish.

Symbiotic Relationships

Relationship Species #1 Species #2

Commensalism + 0Parasitism + -Mutualism + +