Question

(a) What is a trophic level in an ecosystem? What is ‘standing crop’ with reference to it?
(b) Explain the role of the ‘first trophic level’ in an ecosystem.
(c) How is the detritus food chain connected with the grazing food chain in a natural ecosystem?

Answer 1

Answer:

A) Trophic level. In ecology, the trophic level is the position that an organism occupies in a food chain - what it eats, and what eats it. Wildlife biologists look at a natural "economy of energy" that ultimately rests upon solar energy. ... Next are carnivores (secondary consumers) that eat the rabbit, such as a bobcat.

selected Oct 9, 2018 by faiz. A specific place of organisms in the food chain is known as their trophic level. Producers belong to the first trophic level, herbivores to the second and carnivores to the third. Each trophic level has a certain mass of living material at a particular time called as the standing crop...

B) First trophic level is formed by producers. This is the basic unit. These organisms can live without feeding on any another level. The only thing that these organisms need to survive is sunlight and water which they can turn into energy themselves..

C) In this food chain, energy comes from organic matter (or detritus) generated in trophic levels of the grazing food chain. ... It begins with producers, present at the first trophic level. The plant biomass is then eaten by herbivores, which in turn are consumed by a variety of carnivores.

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