Question

data table (choose 3 ecosystems)
analyze data by calculating the conversion efficiency for each trophic level for the five ecosystems and record the results in the data table. the energy conversion efficiency is calculated by dividing the energy at the higher trophic level by the energy at the lower level to obtain a ratio. enter the value as a decimal number.
energy conversion efficiency for ecosystem trophic levels

ecosystem	first order heterotrophs (primary) from producers	second order heterotrophs (secondary) from first order heterotrophs (primary)	third order heterotrophs (tertiary) from second order heterotrophs (secondary)
hot desert
grassland
antarctic ocean shore
freshwater lake

Explanation:

Step1: Recall energy - conversion - efficiency formula

Efficiency = $\frac{\text{Energy at higher trophic level}}{\text{Energy at lower trophic level}}$

Step2: For Hot Desert (assume energy values for primary heterotrophs from producers are $E_1$ and $E_2$)

If energy at producers is $E_1$ and at first - order heterotrophs is $E_2$, efficiency = $\frac{E_2}{E_1}$ (but values are not given in the problem, so we can't calculate a specific number yet)

Step3: For Grassland (similarly, assume energy values)

Let energy at producers be $E_3$ and at first - order heterotrophs be $E_4$, efficiency = $\frac{E_4}{E_3}$ (need actual values)

Step4: For Antarctic Ocean Shore (assume values)

Let energy at producers be $E_5$ and at first - order heterotrophs be $E_6$, efficiency = $\frac{E_6}{E_5}$ (need actual values)

Step5: For Freshwater Lake (assume values)

Let energy at producers be $E_7$ and at first - order heterotrophs be $E_8$, efficiency = $\frac{E_8}{E_7}$ (need actual values)

Since no actual energy values are given for most cases, we can't fill the table completely. But for the Deciduous Forest, the first - order heterotrophs (primary) from producers efficiency is calculated as shown: $\frac{623}{6011}=0.10$

Answer:

For Deciduous Forest:
First Order Heterotrophs (Primary) from Producers: 0.10
For Hot Desert: Need energy values to calculate
For Grassland: Need energy values to calculate
For Antarctic Ocean Shore: Need energy values to calculate
For Freshwater Lake: Need energy values to calculate