As we all know, or are about to learn, all living things depend on each other in a food chain. We need to eat a certain animal which will eat on a plant. If one item was taken out of the chain, then the whole chain would fall apart and this would affect food webs, a bigger circle of food chains combined. If a certain species was included in a couple of food chains, then this species getting wiped out in one area would affect the whole ecosystem.
Certain criteria of an area will effect how the species will survive, food, temperature, birth potential and many others. In the Northern Arctic, the temperatures are very cold and the air is very dry. This land may even be the harshest land in Canada. There may be little or no life in this area because it is very hard to live in a cold, dry, windy climate with no food or shelter. The Northern Arctic is below freezing temperature all year round and these low temperatures make plant growth impossible never mind animals. Also, precipitation is very low which limits the expansion of diversity in an ecosystem.
Even though there may be some animals living in the Northern Arctic, so do humans. Approximately 15 000 people live in the Northern Arctic and you might be able to guess what they need to do to survive. Without trapping and hunting animals, fishing causes a lot of the food chains to break down. They also explore gas and oil and break the balance in nature in the Northern Arctic.