Explanation

The term ‘niche’ was for the first time used by Grinnel (1971) to explain micro-habitats. According to him ‘niche’ is the ultimate distributional unit, within which each species is held by its structural and instinctive limitation. Actually niche is the complete account of how an organism uses its environment. Thus, plant lice (aphids) and leaf is the pair correctly representing the organism and its ecological niche.