Question

Which statement best describes the effect of the loss of a keystone species from an ecosystem?

Answer 1

The populations of other species in the ecosystem would fluctuate dramatically. Thus, option "B" is correct.

What is the role of keystone species?

When an organism exists in an ecosystem in such a way that it impacts  and influences in the ecosystem and has a significant effect incomparable to its number in the population,such organism is said to be a Keystone species. They are responsible for the structure and continue existence of the ecosystem. Thus their absence leads to change in the ecosystem structure.

They maintain ecosystem structure for example by suppressing   the population of  one species of organism. E.g if a keystone species is a predator, its continuous predation on the herbivores which graze over a particular land area maintains balance between the  green plant population and nutrient cycles in the ecosystem. If the the Keystone does not exits overgrazing from the increasing population of the grazers will disrupt the energy and nutrient cycles in the ecosystem, with dramatic change in the ecosystem.

Thus, option "B" is correct.

To learn more about the ecosystem click here:

brainly.com/question/13979184

#SPJ1