Explanation:

Any natural habitat on earth that is inhabited just by a single species doesn't exist. There is no such habitat and such a situation is even inconceivable. For any species, the minimal requirement is one more species on which it can feed. Even a plant species, which makes its own food, cannot survive alone; it needs soil microbes to break down the organic matter in soil and return the inorganic nutrients for absorption. It also requires pollinating agents for survival. It is obvious that in nature,animals, plants and microbes do not and cannot live in isolation but interact in various ways to form a biological community.