Question

Why would the following example be considered a poor scientific hypothesis?

Removing herbivorous fish from a stream will increase the health of aquatic vegetation.

Answer 1

if we discuss this question as per the ecological balance and concepts, if the herbivorous fish is removed from the pond, it will cause enormous growth of aquatic plants and it will lead to loss of all all nutrient at the bottom of the pond as well as it will also affect the growth of non-herbivorous animals living in the pond.

in this way the removal of herbivorous fishes from plants will ultimately have adverse effect on pond ecosystem. because these fish eat up some of the aquatic plants, so their growth remains in equilibrium with other living organisms leading to a healthy pond system.

thus the hypothesis is a poor scientific hypothesis as it is not purely based on scientific theories and principals of ecological balance.