For food the grey wolf is on the top. For othe reaons coyotes, other grey wolves, and humans kill grey wolves food their fur, or in a dispute over territory.
The arctic wolf is a tertiary consumer, or the thing at the top of the chain. The animal beneath the wolf on the food chain is the snow hare or rabbit. The producer, or the bottom of the food chain is some plants.
A grey wolf stays with its pups until it is old enough to hunt, while the pups are still helpless the grey wolf will feed them with half-digested food from its belly-basket
Food chains are just smaller sections of food webs. A wolf, in this case, would fit into the food chain: grass->deer->wolf But the wolf does not just eat deer, and the deer may not just eat grass. So the food web would look similar to bush \ deer grass / \ wolf \ / hare \ lynx
the timber wolf is a sub- name for the grey wolf. In the coniferous range, we call the Grey wolf the Timber wolf. Timber wolves need lots of space with little or no people, and a continual food supply, from as large as a moose to as small as a mouse.