How does the law of conservation of energy applies to the food web and trophic levels?
The point of the Law of Conservation is that energy is neither made nor destroyed but is converted between forms. The first form energy takes when it enters a food chain (or web) is light (plants absorb light energy). The plants convert this to chemical energy, which is the only way for members of successive trophic levels to obtain energy at all. Also, as the energy is passed along the levels, some is lost as heat (heat energy), which is another form the energy takes. For each level, whichever organism(s) occupy that level, they’ll also use the energy for their own body functions, so the energy changes to other forms as well.
