How does the winter in the north effect the outdoor industry small business operations?

I work in trees, and plan to travel to canada for a working holiday later this year, Im wondering what happens during the winter with the outdoor industries. How does this affect their operations? Do they just shut down completely? What do their employees do for the winter? How do company’s service their debt? And surely there must be people available for emergency work, storm damages etc. I come from ever sunny Australia, so i have no idea how this works.