Question

How would you know if an organism was occupying its fundamental or realized niche?

Answer 1

Answer=Competition such as predation and Resources are defining factor to know whether an organism is present in Realized Niche and Fundamental Niche.

When an organism occupied a niche in presence of predators so limited resources are there then such type of Niche called realized Niche(Narrow Niche)

When an organism occupied a niche in absence of predators so Unlimited (Enough) resources are there then such type of Niche called Fundamental Niche(Wide Niche).