文献类型：期刊文献

英文题名：Contrasting Hydraulic Efficiency and Photosynthesis Strategy in Differential Successional Stages of a Subtropical Forest in a Karst Region

作者：Wu, Guilin[1] Chen, Dexiang[1] Zhou, Zhang[1]

第一作者：Wu, Guilin

通信作者：Zhou, Z[1]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Hainan Jianfengling Forest Ecosyst Natl Field Sci, Guangzhou 510520, Peoples R China

年份：2021

卷号：10

期号：12

外文期刊名：PLANTS-BASEL

收录：;Scopus(收录号：2-s2.0-85119994769);WOS:【SCI-EXPANDED(收录号:WOS:000738109500001)】；

基金：Funding: This work was supported by Central Public-interest Scientific Institution Basal Research Fund (CAFYBB2020ZE002), National Natural Science Foundation of China (41773071, 31872701, 32001108) and the Jianfengling National Key Field Station.

语种：英文

外文关键词：forest succession; hydraulic conductance; photosynthetic rate; leaf turgor loss point; wood density; trade-off

摘要：Understanding the successional process from a disturbed forest to a mature forest is essential for species recovery and conservation initiatives. The resource acquisition and drought tolerance of plants can be instructive to predictions of species abundance and distribution for different forests. However, they have not been adequately tested at different successional stages in karst regions. Here, we selected seven dominant species in an early-succession forest and 17 species in a late-succession forest in a karst region of southwestern China. Resource acquisition-related traits such as hydraulic conductivity and photosynthetic rate, and drought tolerance-related traits, including turgor loss point and wood density, were measured. We found that species in the early-succession forest had a higher hydraulic conductance and photosynthetic rate than those in the late-succession forest, while leaf water potential at turgor loss point and wood density showed nonsignificant differences between the two forests. In addition, we observed a significant negative relationship between photosynthetic rate and drought tolerance in the early-succession forest, which was not identified in late-succession forests. Our study indicates that resource acquisition rather than drought tolerance was the key factor explaining plant distributions in forests at different successional stages in karst regions. We also suggest that the resource acquisition and drought tolerance trade-off hypothesis is not always supported for karst region species. Our study could inform about the design of species replacements in successional forests and provide forest management and restoration guidelines for karst regions.