Question

1. mangoes → butterfly → frog → snake 208 kcal available for the 2nd trophic level. fill in the organisms and energy amounts on the pyramid to the right.

Explanation:

Step1: Identify Trophic Levels

The food chain is Mangoes (Producer, Trophic Level 1) → Butterfly (Primary Consumer, Trophic Level 2) → Frog (Secondary Consumer, Trophic Level 3) → Snake (Tertiary Consumer, Trophic Level 4). The energy at Trophic Level 2 (Butterfly) is given as 208 kcal.

Step2: Apply 10% Energy Transfer Rule

In a trophic pyramid, typically about 10% of energy is transferred from one level to the next.

• For Trophic Level 3 (Frog): Energy = \( 208 \times 0.1 = 20.8 \) kcal.
• For Trophic Level 4 (Snake): Energy = \( 20.8 \times 0.1 = 2.08 \) kcal.
• The producer (Mangoes) would have energy \( 208 \div 0.1 = 2080 \) kcal (though the problem focuses on levels after the 2nd, but to fill the pyramid: Trophic Level 1: 2080 kcal, Trophic Level 2: 208 kcal, Trophic Level 3: 20.8 kcal, Trophic Level 4: 2.08 kcal).

Answer:

• Trophic Level 1 (Mangoes): 2080 kcal
• Trophic Level 2 (Butterfly): 208 kcal (given)
• Trophic Level 3 (Frog): 20.8 kcal
• Trophic Level 4 (Snake): 2.08 kcal

(If the pyramid has slots from left (producer) to right (top consumer), fill as: Leftmost (Mangoes): 2080 kcal, next (Butterfly): 208 kcal, next (Frog): 20.8 kcal, rightmost (Snake): 2.08 kcal)