文献类型：期刊文献

英文题名：Relative contributions of competition, stand structure, age, and climate factors to tree mortality of Chinese fir plantations: Long-term spacing trials in southern China

作者：Zhang, Xiongqing[1,2] Wang, Zhen[1] Chhin, Sophan[3] Wang, Hanchen[1] Duan, Aiguo[1] Zhang, Jianguo[1,2]

第一作者：张雄清;Zhang, Xiongqing

通信作者：Zhang, JG[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat,State Forestry A, Beijing 100091, Peoples R China;[2]Nanjing Forestry Univ, Collaborat Innovat Ctr Sustainable Forestry South, Nanjing 210037, Peoples R China;[3]West Virginia Univ, Div Forestry & Nat Resources, 322 Percival Hall,POB 6125, Morgantown, WV 26506 USA

年份：2020

卷号：465

外文期刊名：FOREST ECOLOGY AND MANAGEMENT

收录：;EI(收录号：20201508393069);Scopus(收录号：2-s2.0-85082746031);WOS:【SCI-EXPANDED(收录号:WOS:000528192200025)】；

基金：The study was supported by the National Natural Science Foundation of China (No. 31670634) and State Administration of Forestry and Grassland of China (2019132605).

语种：英文

外文关键词：Tree mortality; Competition; Age; Stand structure; Climate; Chinese fir

摘要：Tree mortality is an important process during forest succession, influencing forest structure, composition, and ecosystem services. Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.), a native and fast growing species with high quality timber, is widely planted in southern China. Yet the mechanisms leading to tree mortality of Chinese fir plantations under climate change conditions is still not clearly understood. A long-term spacing trial including 60 permanent plots located in Fujian, Jiangxi, Guangxi, and Sichuan provinces in southern China were used to explore tree mortality in relation to competition, age, structural diversity, and climatic variables using a logistic mixed effects model. Results showed that tree mortality increased with increasing LnN (natural logarithm of number of trees per ha), tree density index (TN), Gini coefficient, age (A), LnAP (natural logarithm of annual precipitation), and mean warmest month temperature, and decreased with increasing relative density (RD), inverse of diameter (VD), and mean annual temperature. The relative contributions of competition, age and structure variables to mortality were 88.82%, much larger than climate variables 11.18%. In addition, in view of the contributions of stand factors, competition indices including RD, LnN, TN were 50.57%, much larger than age (A, 1/D) contribution of 37.45%, and structural diversity contribution of 0.80%, which indicated that competition was the main driver of tree mortality. Our findings highlight the mechanisms of tree mortality of Chinese fir in southern China under climate change.