Stomata Are Driving the Direction of CO₂-Induced Water-Use Efficiency Gain in Selected Tropical Trees in Fiji.

ABSTRACT: Understanding plant physiological response to a rising atmospheric CO₂ concentration (c_a) is key in predicting Earth system plant-climate feedbacks; however, the effects of long-term rising c_a on plant gas-exchange characteristics in the tropics are largely unknown. Studying this long-term trend using herbarium records is challenging due to specimen trait variation. We assessed the impact of a c_a rise of ~95 ppm (1927-2015) on the intrinsic water-use efficiency (iWUE) and maximum stomatal conductance (g_smax) of five tropical tree species in Fiji using the isotopic composition and stomatal traits of herbarium leaves. Empirical results were compared with simulated values using models that uniquely incorporated

SUBMITTER: Soh WK 

PROVIDER: S-EPMC11428275 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature