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The cyclic exchange of chemicals between organisms and the environment is called chemical cycling. The three major components that transfer throughout the ecosystem are nitrogen, phosphorous, and carbon.

Decomposition release carbon and nutrients from the complex material that makes up living things, reintroducing them into the biological system and making them available to plants and other species.

Thus, the decomposition rate in the ecosystem has the greatest effect on the rate of chemical cycling.

Therefore, the given statement is correct.

Sugars, lipids, and proteins were taken from other species are used by consumers as a source of energy to expand and sustain their cells. It is impossible to recycle the energy that flows through the biosphere.

Thus, the production efficiency of the ecosystems consumers does not affect the chemical cycling.

Therefore, the given statement is incorrect.

The ratio of one trophic level's production to the next lower trophic level's production is computed as the percentage of energy gained and converted into biomass by consumers in one trophic level from the total stored energy of the preceding trophic level. This is the trophic efficiency which is not recycled.

Thus, the trophic efficiency of the ecosystem does not affect the rate of chemical cycling.

Therefore, the given statement is incorrect.

The 'reservoir' aims to fill the gap left by an imbalance in the rate of input and efflux. The place where nutrients are stored for a more extended period is called a reservoir. The location of the reservoir thus does not affect the cycling in the ecosystem.

Thus, the location of the reservoir does not affect the chemical cycling in the ecosystem.

Therefore, the given statement is incorrect.