A) always upright
B) always inverted
C) Both [a] and [b]
D) None of the above
Correct Answer: A
Solution :
Pyramid of energy in a forest ecosystem is always upright. This type of pyramid shows energy accumulation pattern at different trophic levels. Primary producers are characterized by maximum value and at each successive tier of consumers the energy value per square meter per year is decreased by approximately 1/10. Thus, there is noted a gradual decrease in the energy content at successive trophic level from producers to consumers.
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