___ refers to the variety of animals, plants and microbes generally found in an area.
Write one word for the following : Variety of plants, animals and micro-organisms generally found in an area.
Apart form plants and animals, microbes from a permanent biotic component in an ecosystem. While plants have been referred to as autotroophs and animals as heterotrophs, what are microbes referred to as? How do the microbes fulfil their energy requirements?