Water transport of native and exotic tree species in relation to xylem anatomical characteristics in low subtropical China

作     者：Yanting Hu Jianguo Gao Ping Zhao Weijun Shen Peiqiang Zhao Liwei Zhu Guangyan Ni Junfeng Niu Lei Ouyang 

作者机构：Key Laboratory of Vegetation Restoration and Management of Degraded EcosystemsSouth China Botanical GardenChinese Academy of SciencesXingke Road 723Tianhe DistrictGuangzhou 510650China University of Chinese Academy of SciencesBeijing 100049China Guangdong Provincial Key Laboratory of Applied BotanySouth China Botanical GardenChinese Academy of SciencesGuangzhou 510650China 

出 版 物：《Journal of Plant Ecology》 (植物生态学报（英文版）)

年 卷 期：2018年第11卷第3期

页      面：423-433页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0907[农学-林学] 08[工学] 0829[工学-林业工程] 09[农学] 0901[农学-作物学] 0902[农学-园艺学] 0713[理学-生态学] 

基　　金：This study was financially supported by the National Natural Science Foundation of China(Grant No.41630752,31130011,41030638,31300335) the CAS/SAFEA International Partnership Program for Creative Research Teams 

主　　题：sap-flux density conduit characteristics sapwood area water transport 

摘      要：Aims Exotic fast-growing tree species have been commonly planted as pioneer species to facilitate ecological restoration in South *** growth and resource utilization behavior related to intrinsic physiology and structural properties have profound influences on forest ***,the contrastive research focusing on water utilization features along with xylem anatomical properties between native and exotic species is scarce in South *** objective of this study is to investigate the sapwood anatomical characteristics and water utilization conditions of native and exotic fast-growing species,and to elucidate the relationship between sap-flux density and conduit *** We measured sap-flux density,conduit length,diameter and density of four native species(Schima superba,Michelia mac-clurei,Castanopsis hystrix and Castanopsis fissa)and four exotic species(Eucalyptus citriodora,Eucalyptus urophylla×grandis,Acacia auriculaeformis and Acacia mangium).Sap flux density was measured based on the Granier’s thermal dissipation probe *** whole-tree water transport was quantified by mul-tiplying sap-flux density by sapwood *** measurements of conduit characteristics were conducted by using segregation and slice *** Findings Sapwood area increased with the growing diameter at breast height(DBH)as a power *** species had a larger water-conducting tissue area than exotic species at the same DBH value when trees grew to a size with a certain value of *** con-duit diameter of exotic species was significantly larger than that of native ***,native species,such as *** and ***,had longer conduit length and higher conduit den-sity than other tree *** on a physiological interpretation of the measured conduit characteristics,native tree species devel-oped a safe water transport system while exotic fast-growing tree species come into being an efficient system *** trans-port i