What is a niche? Give one example.

The role that a species plays is called its ecological niche. A niche includes more than what an organism eats or where it lives.

For example, a garden spider is a predator that hunts for prey among plants, while an oak tree grows to dominate a forest canopy, turning sunlight into food. 

Further Readings-

1. Importance of Biodiversity
2. Destruction of Ecosystem