Dominant Species in Subtropical Forests Could Decrease Photosynthetic N Allocation to Carboxylation and Bioenergetics and Enhance Leaf Construction Costs during Forest Succession

Frontiers in Plant Science
Yihua XiaoYuanwen Kuang

Abstract

It is important to understand how eco-physiological characteristics shift in forests when elucidating the mechanisms underlying species replacement and the process of succession and stabilization. In this study, the dominant species at three typical successional stages (early-, mid-, and late-succession) in the subtropical forests of China were selected. At each stage, we compared the leaf construction costs (CC), payback time (PBT), leaf area based N content (NA), maximum CO2assimilation rate (Pmax), specific leaf area (SLA), photosynthetic nitrogen use efficiency (PNUE), and leaf N allocated to carboxylation (NC), and to bioenergetics (NB). The relationships between these leaf functional traits were also determined. The results showed that the early-succession forest is characterized with significantly lower leaf CC, PBT,NA, but higherPmax, SLA, PNUE,NC, andNB, in relation to the late-succession forest. From the early- to the late-succession forests, the relationship betweenPmaxand leaf CC strengthened, whereas the relationships betweenNB,NC, PNUE, and leaf CC weakened. Thus, the dominant species are able to decrease the allocation of the photosynthetic N fraction to carboxylation and bioenergetics during forest succession. T...Continue Reading

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Citations

Dec 18, 2021·Frontiers in Plant Science·Yihua XiaoTushou Luo

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Methods Mentioned

BETA
PCA

Software Mentioned

WinNEEDLE
SPSS

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