Why must estimates of palm age based on leaf scars be used carefully?

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Dense grove of acai palm trees (Euterpe oleracea) with slender trunks and abundant green fronds growing on Combu Island in Belem, Para, Brazil. — Palm Wild acai palms (*Euterpe oleracea*) growing on Combu Island in Belem, state of Para in Brazil.

Estimates of a palm's age based on leaf scars must be used with considerable caution because the rate of leaf production is not constant. Research indicates that this rate can vary significantly depending on various environmental factors, making a simple count of scars an unreliable indicator of chronological age.1