1. Biodiversity provides plant pollinators, predators, decomposers and contributed to soil fertility.

2. It helps in the purification of air and water, management of flood, drought and other environmental disasters.

3. Ecosystems with more diversity can withstand the environmental challenges better because genetically diverse species present in the ecosystem will have different tolerance ranges for a given environmental stress, hence they cannot be easily eliminated by any single stress at a time. However, if the ecosystem contains only few species, it will become a fragile or unstable ecosystem.

4. The species with high genetic diversity and the ecosystems with high biodiversity have greater capacity for adaptation against environmental perturbations.