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Stomatal density, size and space-use efficiency at the community level in China

Citation

Liu, Congcong; Sack, Lawren; He, Nianpeng; Li, Ying (2022), Stomatal density, size and space-use efficiency at the community level in China, Dryad, Dataset, https://doi.org/10.5061/dryad.w6m905qr2

Abstract

The maximum stomatal conductance (g), a major anatomical constraint on plant productivity, is a function of the stomatal area fraction (f) and stomatal space-use efficiency (e). However, f and g have been considered as equivalents, with e rarely considered, and their adaptation to the environment and their regulation of ecosystem productivity are unclear. Here, we analyzed the community-weighted mean, variance, skewness, and kurtosis of stomatal traits from tropical to cold-temperature forests. The variance of g and f was higher for arid sites, indicating greater functional niche differentiation, whereas that for e was lower, indicating convergence in efficiency. Besides, when other stomatal trait distributions remained unchanged, increasing kurtosis but decreasing skewness of g would improve ecosystem productivity, and f showed the opposite patterns. These findings highlight how the relative importance and equivalence of inter-related traits can differ at community scale.

Funding

China Postdoctoral Science Foundation, Award: 2020M680663