Question

Why is the rate of assimilation of energy at the herbivores level called secondary productivity?

Answer 1

.. The rate of assimilation of energy at herbivore (primary consumer) level is called secondary productivitybecause the biomass available to the organisms of this trophic level is a resultant of the primary productivity, which is formed by autotrophs (plants).

Answer 2

Stomatal closure prevents water loss from transpirational pathways. Stomatal closure is more closely related to soil moisture content than leaf water status, and it is mainly controlled by chemical signals such asabscisic acid (ABA) production in dehydrating roots.