15 Examples of Mutualism In Biology

Mutualism is a symbiotic relationship where both organisms are getting something out of it. Like, bees and flowers, the bees get nectar and pollen from the flowers, and the flowers get pollinated by the bees. It’s a win-win situation.

Acacia trees and ants, oxpeckers and mammals, humans and intestinal flora, coral reefs and zooxanthellae, bumblebees and tomato plants, clownfish and sea anemones, cattle egrets and large herbivores, pilot fish and sharks, lichen, flowering plants and mycorrhizae, dogs and humans, and legumes and nitrogen-fixing bacteria are some common examples of Mutualism.

In each of these examples, the two organisms have evolved together to rely on each other for their survival.

Examples of Mutualism

Here are 15 common examples of mutualism in biology:

1.  Bees and flowers

Bees and flowers are one of the most common examples of mutualism. Bees gather nectar and pollen from flowers to feed their colonies. In return, bees transfer pollen from plant to plant, enabling the plants to reproduce. This relationship is essential for both bees and flowering plants.

image showing Bees and flowers as an example of mutualism

2. Acacia trees and ants

Acacia trees provide food and shelter for ants. In return, the ants protect the trees from herbivores. This relationship is beneficial for both the trees and the ants.

image showing Acacia trees and ants as an example of mutualism

3. Oxpeckers and mammals

Oxpeckers are birds that eat ticks and other parasites from the skin of large mammals. The mammals benefit from having the parasites removed, and the oxpeckers benefit from having a source of food.

image showing Oxpeckers and mammals as an example of mutualism

4. Humans and intestinal flora

The human digestive system is home to trillions of bacteria that help us to digest food. In return, we provide the bacteria with a warm, safe place to live. This relationship is essential for human health.

image showing Humans and intestinal flora as an example of mutualism

5. Coral reefs and zooxanthellae

Coral polyps live symbiotically with zooxanthellae, which are tiny algae that photosynthesize food for the coral. The coral provides the zooxanthellae with a place to live and protection from predators. This relationship is essential for the survival of coral reefs.

image showing Coral reefs and zooxanthellae as an example of mutualism

6.  Bumblebees and tomato plants

Bumblebees transfer pollen from tomato plant to tomato plant, enabling the plants to produce fruits. The bumblebees benefit from the nectar that the plants produce. This relationship is beneficial for both the plants and the bees.

image showing Bumblebees and tomato plants as an example of mutualism

7.  Clownfish and sea anemones

Clownfish live among the tentacles of sea anemones, which are predators that can sting and kill other fish. The clownfish are protected from predators by the sea anemones, and they also help to clean the sea anemones. This relationship is beneficial for both the clownfish and the sea anemones.

image showing Clownfish and sea anemones as an example of mutualism

8.  Cattle egrets and large herbivores

Cattle egrets ride on the backs of large mammals, such as cows and rhinos, to catch insects that are stirred up by the mammals’ hooves. The mammals benefit from having the insects removed, and the cattle egrets benefit from having a source of food.

image showing Cattle egrets and large herbivores as an example of mutualism

9.  Pilot fish and sharks

Pilot fish eat parasites from the skin of sharks. The sharks benefit from having the parasites removed, and the pilot fish benefit from having a source of food and protection from predators.

image showing Pilot fish and sharks as an example of mutualism

10. Lichen

Lichen is a symbiotic relationship between a fungus and an alga or bacterium. The fungus provides the alga or bacterium with a place to live and protection from the environment. The alga or bacterium provides the fungus with food from photosynthesis. This relationship is beneficial for both the fungus and the alga or bacterium.

image showing Lichen as an example of mutualism

11. Flowering plants and mycorrhizae

Mycorrhizae are fungi that grow in the roots of flowering plants. The fungi help the plants to absorb nutrients from the soil, and the plants provide the fungi with food from photosynthesis. This relationship is beneficial for both the plants and the fungi.

image showing Flowering plants and mycorrhizae as an example of mutualism

12. Dogs and humans

Dogs and humans have a long history of co-domestication. Dogs provide humans with companionship, protection, and help with herding and hunting. Humans provide dogs with food, shelter, and care. This relationship is beneficial for both dogs and humans.

image showing Dogs and humans as an example of mutualism

13. Legumes and nitrogen-fixing bacteria

Legumes, such as peas, beans, and alfalfa, have a symbiotic relationship with nitrogen-fixing bacteria. The bacteria convert nitrogen from the air into a form that the plants can use. The plants provide the bacteria with a place to live and protection from the environment. This relationship is beneficial for both the plants and the bacteria.

image showing Legumes and nitrogen-fixing bacteria as an example of mutualism

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