Answer:
Ecologist Paul Ehrlich gave rivet popper
hypothesis to help understand the contribution species richness, He compared
each species with rivet in the body of an airplane.
(i) This hypothesis explains that
ecosystem to be an airplane and the species to be the rivets joining all parts
together.
(ii) If every passenger
travelling in the airplane start taking rivets home (causing a species to
become extinct), initially it may not affect flight safety (proper functioning of
ecosystem), but over a period of time the plane becomes weak and dangerous (species
become endangered and then extinct.
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