Arctic foxes are normally found in the arctic and alpine tundra. They can also be found in the treeless tundra extending through the arctic regions. Arctic foxes' habitat is shrinking because of the warming climate, which would be an example of density-independent. Arctic Foxes are known for following their prey, which would be an example of density-dependent, if the weather is cold enough they will emigrate from Russia and they will immigrate to Alaska.
When there is more food resources (normally small animals or they will scavenge off of large animals carcasses they find) they will have a better chance of their young surviving and they will most likely have a growth in their population. When their is less food it is harder for the arctic foxes to reproduce and raise their young.
Population grows when the resources and their habitat is big enough to support enough arctic foxes.