Arctic Fox Food Web and Ecosystem Role — Reading Comprehension

The tundra is an environment dominated by snow and ice for most of the year, with temperatures that plunge far below freezing. In this harsh landscape lives the Arctic fox, a highly adapted animal known for its resilience. The Arctic fox not only survives in these extreme conditions but also plays a vital role in maintaining the balance of its ecosystem—a community of living organisms interacting with their physical environment.

The Arctic fox (Vulpes lagopus) is a master of survival, and its role as both a predator and a scavenger is vital. As a predator, the Arctic fox actively hunts other animals for food. Its main prey are small rodents like lemmings and voles, which burrow under the snow. When lemming populations are high, the Arctic fox thrives, having plenty to eat. They also hunt birds, eggs, and even young seals when opportunities arise. This hunting helps control the populations of these prey animals, preventing them from overpopulating and consuming too much vegetation.

But the Arctic fox doesn't just hunt; it's also an incredibly efficient scavenger. A scavenger is an animal that feeds on the remains of dead animals it did not kill. In the Arctic, this often means following polar bears or wolves and eating the leftovers from their hunts. This behavior is very important because it helps clean up the environment and ensures that no energy from dead animals goes to waste. It's a key part of the food web, which shows how energy flows from one living thing to another in an ecosystem.

The Arctic fox's diverse diet and adaptable feeding habits are crucial for the flow of energy in the Arctic tundra. Energy enters the food web when plants create their own food using sunlight. This energy then moves up the chain when lemmings eat plants, and then again when the Arctic fox eats lemmings. By preying on some animals and scavenging others, the Arctic fox helps to distribute energy throughout the ecosystem. Without the Arctic fox, populations of its prey could grow too large, or dead animal remains might accumulate, affecting the health and balance of the entire Arctic environment. Its presence supports the biodiversity, or variety of life, in this unique habitat.

Interesting Fact: Arctic foxes have a thick coat of fur that changes color with the seasons, from white in winter to brown or gray in summer, providing excellent camouflage.

What is the Arctic fox's primary habitat?

What do Arctic foxes mainly hunt?

The Arctic fox is important as both a predator and a scavenger. True or False?

What is the definition of a 'predator' as used in the passage?

How does the Arctic fox being a predator help the ecosystem?

Why is scavenging an important role for the Arctic fox?

What happens if lemming populations grow too large?

How does the Arctic fox affect energy flow?

If a new predator, like a large bird, started eating lemmings, what might happen to the Arctic fox population?

A factory pollutes the tundra, killing many lemmings. How might this affect the Arctic fox and the ecosystem?