Question

1. take the food chain given and write the names of the organisms into their proper spot on the pyramid. then, start with 91000 kcal of energy at the grasshopper level and write in how much energy would move on to each subsequent level. (8 pts.)

grass → grasshopper → chickadee → bobcat
what happens to all the energy that doesn’t make it to the next level of the pyramid?

if each chickadee requires 700 kcal to be kept alive, how many chickadees can this pyramid to the right support?

Explanation:

Step1: Determine energy transfer rule

In a food - chain, about 10% of the energy is transferred to the next trophic level.

Step2: Calculate energy at chickadee level

The energy at the grasshopper level is 91000 kCal. The energy transferred to the chickadee level (10% of grasshopper energy) is $91000\times0.1 = 9100$ kCal.

Step3: Calculate energy at bobcat level

The energy transferred to the bobcat level (10% of chickadee energy) is $9100\times0.1=910$ kCal.

Step4: Answer the energy - loss question

The energy that doesn't make it to the next level is lost as heat through metabolic processes (such as respiration) by the organisms at each level.

Step5: Calculate number of chickadees

If each chickadee requires 700 kCal to be kept alive, the number of chickadees the pyramid can support is $\frac{9100}{700}=13$.

Answer:

Energy at chickadee level: 9100 kCal
Energy at bobcat level: 910 kCal
The energy that doesn't make it to the next level is lost as heat through metabolic processes.
Number of chickadees: 13