Epiphytes

Have you ever noticed how certain plants can survive in weird locations? For instance, those thriving on high rocky mountains and dangling from tree branches. The intriguing world of epiphytes holds the explanation for such wonders. These unique plants possess evolved capability to develop in the absence of soil, depending on the trees, rocks and other structures for their support.

Table of Contents

What are Epiphytes?
Adaptations and Characteristics of Epiphytes
How are Epiphytes different from Parasites?
Practice Problems
Frequently Asked Questions

What are Epiphytes?

A plant that grows on other plants is called an epiphyte. They are air plants as they are not rooted in the ground. They obtain their nutrition from sources like air and rainwater. Epiphytes have the potential to attain a variety of adaptations to survive and obtain their nutrition.

The epiphytes can be easily observed on plants' leaves, trunks, branches and other surfaces and are abundantly found in rainforests. Though anchored to a tree, they do not directly absorb water or nutrients from them.

For physical support, epiphytes mainly grow on other plants while producing their own nourishment. They are perched on the tree, obtaining adequate light and receiving water from raindrops falling from the branches. Similarly, epiphytes obtain their nutrition from the leaves that are swept away from the leaves during rainfall. Also, the dead and decomposing parts that are available on the surface deliver nutrients for the epiphytes. This connection is called commensalism. Commensalism happens when one species takes advantage while other species remain neutral, that is, neither gains nor loses. Therefore, it is quite clear that they do not hurt their host. However, some epiphytes may also hurt their host by competing with them for nutrition and light.

Adaptations and Characteristics of Epiphytes

In order to suit their needs, epiphytes are well adapted by capturing the nutrients and water available in the air from the rain and debris of the trees. It is important to overcome the deficiency of water and nutrition in the forest canopy. Epiphytes have the potential to grow where the ground is heavily vegetated because of their adaptations. Some of the key characteristics easing their adaptation include:

Epiphytes typically flourish in highly populated rainforests, where there are abundant resources like nutrients, moisture and light.
Epiphytic habit aids them in grabbing their essential sources from moist air.
Both temperate and tropical regions embrace epiphytes.
Fog delivers moisture to epiphytes.
Aerial roots aid the epiphytes in clinging to the surfaces they can develop.
Certain epiphytes possess roots that are specialised to perform additional tasks, such as in orchids. They possess photosynthetic roots, which absorb moisture in certain plants.
The roots of the parasitic epiphyte, called mistletoe, can be altered to penetrate the host plant and absorb moisture content.
When the epiphytic plant called Strangler fig’s root grows too long and touches the ground, it anchors itself to the ground.
Epiphytes can also kill their host tree by surrounding them and further deteriorating their secondary phloem.
They compete for light and nutrients with their host plants.
Thicker stems of orchids enable them to store water.
Epiphytes collect water using their modified leaves that function as a furrow or a pitcher.

How are Epiphytes Different from Parasites?

There are major differences between epiphytes and parasites. These are:

Parasites may harm their host plants. On the other hand, epiphytes do not harm their host plants except for certain types.
Parasites rely on their host metabolically, but epiphytes do not depend on their host metabolically.
Parasites rely on their host plants directly for food, shelter and lodging. At the same time, epiphytes do not directly depend on their host plants for food and nutrients but for physical support.

Practice Problems

Q1. Choose the epiphytes from the following

a. Ball mass
b. Stringer fig
c. Orchid
d. All of the above

Ans: d. All of the above

Orchid, stringer fig and ball mass are the epiphytes.

Q2. Epiphytes can be found in

a. Rich ecosystem
b. Moderate ecosystem
c. Standard ecosystem
d. None of the above

Ans. a. Rich ecosystem

Epiphytes flourish in rich ecosystems.

Q3. _____ can store water in their thick stems.

a. Orchids
b. Mosses
c. Mistletoe
d. All of the above

Ans. a. Orchids

Orchids possess thick stems that can conserve water.

Frequently Asked Questions

Q1. State two examples of epiphytes Can epiphytes live independently?
Ans. Yes, the epiphytes are capable of living independently. However, it includes a few species. Common examples of such epiphytes include Spanish moss, resurrection fern and air plants.

Q2. Are epiphytes endangered?
Ans. Excessive habitat loss has led to certain epiphytes' endangered conditions. Further, the activities like deforestation and soil erosion are also among the leading causes of the deterioration of the ecosystem.

Q3. Can I grow epiphytes at my home?
Ans. Cet\rtain epiphytes can be grown in your home like bromeliads and orchids. They require specific areas where they can receive light and moisture to grow well. They can easily adapt to the indoor environment.