Final answer:
Trophic level transfer efficiency can be used to calculate the energy available in each trophic level. However, without additional information, it is not possible to determine the exact energy in the 'n' trophic level in this scenario. The correct answer is a. Linear Pairs Theorem.
Step-by-step explanation:
The amount of energy available in each trophic level in an ecosystem generally decreases as you move up the food chain. This is due to the loss of energy through various processes, such as metabolic heat and inefficient energy transfer. The trophic level transfer efficiency (TLTE) can be calculated to determine the energy available in each trophic level. TLTE is defined as the production at the present trophic level divided by the production at the previous trophic level, multiplied by 100.
In the given example, if the primary producers have 1600 kcal/m² and the primary consumers have 900 kcal/m², we can calculate the TLTE as follows:
TLTE = (900 / 1600) × 100
TLTE = 56.25
Therefore, the trophic level transfer efficiency in this scenario is 56.25%. To calculate the energy in the 'n' trophic level, you would continue this calculation, multiplying the TLTE by the energy at the previous trophic level. However, without additional information about the TLTE between the higher trophic levels, it is not possible to accurately determine the energy in the 'n' trophic level.
Therefore, the correct answer is a. Linear Pairs Theorem.