Question

Rivet popper hypothesis was given by
A. Paul Ehrlich
B. Alexander von Humboldt
C. David Tilman
D. Robert May

Answer 1

Hint: This hypothesis was given by an ecologist to give the importance of each species in the balancing of ecosystems. He told us how the key species are important for the ecosystem. He used aeroplane and its parts to illustrate the importance of species.

Complete answer:
The theory of rivet popper was given by ecologists to give the importance of different species to the ecosystem and if by chance we lost even a single species how much it affects the environment and ecosystem. How it affects functionality and diversity of the ecological communities.
In certain areas if we lose particular speciality in any biological areas it is possible that the whole ecosystem may collapse, thus this theory assumes that biological communities have some relatively specialized variety of species that are there with the limited strength to occupy each other's place. Thus, vanishing of certain species is important for the proper functioning of the ecosystem.
This rate of species vanishing affects the ecosystem but at a slow rate it is not that much of an effect but if this rate is high may affect the functionality of the ecosystem with heavy loss.
Now, rivet hypothesis ecologist compares the ecosystem with an aeroplane and the rivet with the species within the ecosystem that are joining parts of the ecosystem and rivet are joining part of the aeroplane. Now, if passengers sitting in the aeroplane start taking out rivets then in the starting it will have no effect on the flight but if passengers continue to take out the rivets, then flight will not be smooth and rivets will not be able to maintain the flight.
Similarly, if we exploit the important species then the ecosystem will not be able to function properly and the ecosystem may collapse. These key-rivets are important for the flight of the aeroplane the same way key species are important for the proper balancing of ecosystems.

This amazing theory was given by Paul Ehrlich.

Note: In this theory the aeroplane is compared with the aeroplane. Functioning of the aeroplane is compared with the functioning of ecosystem and the rivets present on the wing =s of aeroplane which involve directly in the flight function, are compared to the important or key species of the ecosystem which involve in the functioning of the overall system.