There are some people who would like to understand the different trophic systems because they do not understand why the food chain is only limited to 5 trophic levels. It should be remembered that for each trophic level, there is a certain amount of energy that is being consumed. There are two laws that are being followed for this. The first law is that energy cannot be created or destroyed, which means that it will just be passed on to the next level. There are times when the level of energy will tremendously change. The second law is that there may be a loss of energy whenever heat is released, which normally occurs when the energy is transferred between trophic levels.
Energy loss is the correct answer to this question. With the progression of each level, organisms on the scale will lose energy that would have been gained from previous tropics. The process of life and material that is wasted is what causes energy loss. In total, there are seven of them. To remember them, the acronym MRS GREN can be remembered. Each letter represents a part of the energy loss. M is for movement, R stands for respiration, S is for sensitivity, G stands for growth, R is for reproduction, E stands for excretion, and N is for nutrition. All of these are why energy is lost through the food chain.
The food chain is only limited to 5 trophic levels because there is so much energy that gets lost during each available process that occurs. Take note that for every trophic that you go through, the level of energy depletes probably because of the things that may get lost. In order to remember the things that may get lost, MRS GREN should be remembered.
MRS GREN stands for Movement, Respiration, Sensitivity then Growth, Reproduction, Excretion, and Nutrition. There is so much energy that will get lost from the producer going to the next levels that are available. Even digestion can cause some of the energy to get lost.
The correct answer to this question is energy loss. As each level is progressed through, the organism on the scale will lose any energy that may have been gained from the previous trophic. Wasted material and life processes are the cause of energy loss. There are seven of them, and MRS GREN is how one can remember them.
M stands for movement, R, for respiration, S for sensitivity, G for growth, R for reproduction, E for excretion, and N for nutrition. All of these are reasons why, throughout the food chain, energy is wasted away and lost. If there were more than four, energy from all the tropics would be lost, and there would be no point to the food chain.
Food chains are limited to 4-5 trophic levels because energy losses between trophic levels restrict the length of food chains and the biomass of higher trophic levels. The energy added to the biomass by each successive trophic level is less than the one before, and is therefore reduced further in each successive trophic level.
Most of the energy in food that is digested and absorbed by organisms in a trophic level is later released in respiration for use in cell activities; It is therefore lost as heat. The organisms in a trophic level are not usually entirely consumed by organisms in the next trophic level.
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