Here's a few definitions I like to use for these sorts of conversations.
conservation: The wise use and planned management of a natural resource to prevent over-exploitation, destruction, or neglect. Today, wildlife conservation has evolved into a science, but its goal remains essentially the same: to ensure the wise use and management of renewable resources. Given the right circumstances, the living organisms that we call renewable resources can replenish themselves indefinitely.
preservation: When natural resources are allowed to take their own course without human usage, management, or intervention. Preservation is another means of protecting or saving a resource by setting land aside as 吐orever wild. Preservation means no consumptive use of timber, wildlife, or other resources.
wildlife management: The art and science of interrelating wildlife populations and habitats in a manner that strikes a balance with the needs of people.
See, my property isn't a preserve; it's a working environment where people (me and my family, and a select group of friends) get to take the excess product (i.e. profit). Just like farms are. Only in my case, I don't exercise total control over the animal life as a pig, cattle, sheep, goat, horses or chicken farmer. I do plant to encourage wildlife procreation, growth, protective cover, overwinter survival and harvesting.
Now farms deal with vermin and pest control. Vermin and pests like weeds, rats, mice, flies, screwworms, gophers, prairie dogs, etc. Some of those pests are also product: squirrels, rabbits, muskrats, beaver, deer, grouse, and turkeys.
One final point. Humans are a natural part of the environment in all post-glaciation North America. That environment was a blank slate when the ice retreated, and it was repopulated at the same time with human beings, animals and plants. Those people were the nomadic ancestors of the native American Indians. And they most definitely had an impact on the entire environment of the northern forests.