How might an ecologist test whether a species is occupying its realized or its fundamental niche?
A) Study the temperature range and humidity requirements of the species.
B) Observe if the niche size changes after the addition of nutritional resources to the habitat.
C) Observe if the niche size changes after the introduction of a similar non-native species.
D) Measure the change in reproductive success when the species is subjected to environmental stress.
E) Remove a competitor species to see if the species expands its range.

Question

Quizplus · Accepted Answer

Removing a competitor species would allow the focal species to occupy its fundamental niche, as it would no longer face competition for resources. If the focal species expands its range in the absence of a competitor, it suggests that it was previously occupying a realized niche due to competition with the other species. The other options may provide some insight into the species' niche requirements or limiting factors, but they do not directly test whether the species is occupying its realized or fundamental niche.

How Might an Ecologist Test Whether a Species Is Occupying