Commensalism

XinJie HuiXiang Tony

What does commensalism mean? +

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What does commensalism mean? +

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One organism benefits from the relationship while the other species involved neither benefits nor is harmed.

1. Chemical commensalism

Involves at least one species of bacteria feeding on the chemicals produced or

the waste products that are not used by the other bacteria

(Most often observed between two species of bacteria)

Involves at least one species of bacteria feeding on the chemicals produced or

the waste products that are not used by the other bacteria

(Most often observed between two species of bacteria)

Involves at least one species of bacteria feeding on the chemicals produced or

the waste products that are not used by the other bacteria

(Most often observed between two species of bacteria)

Acetobacter oxydans

carries out oxidation on…

Mannitol

Involves at least one species of bacteria feeding on the chemicals produced or

the waste products that are not used by the other bacteria

(Most often observed between two species of bacteria)

Acetobacter oxydans)

carries out oxidation on…

Mannitol

TO PRODUCE…

(Most often observed between two species of bacteria)

Involves at least one species of bacteria feeding on the chemicals produced or

the waste products that are not used by the other bacteria

Fructose

(Most often observed between two species of bacteria)

Involves at least one species of bacteria feeding on the chemicals produced or

the waste products that are not used by the other bacteria Fructose

(Most often observed between two species of bacteria)

Involves at least one species of bacteria feeding on the chemicals produced or

the waste products that are not used by the other bacteria

Saccharomyces carlsbergensis

(beneficiary)

FO

R…

FOOD

Inquilinism 2.

the host organism neither benefits nor is harmed

Metabiosis 3.

Occurs when one species unintentionally creates a home for another species through one of its normal life activities

The Gila woodpecker creates holes in the surface of the cacti when searching for food and water. These abandoned holes are then used as homes and nesting sites by other organisms.

Phoresy 4.

Takes place when one organism attaches to another organism specifically for the purpose of gaining transportation

Flower mites are wingless and so use

foraging bees to travel to new

flowers. When bees enter a flower to

collect nectar or pollen the mites

climb on to the bee. The bee then flies to

the next flower and the mites climb off

the bee.