文献类型：期刊文献

英文题名：Long-term tree and stand growth dynamics after thinning of various intensities in a temperate mixed forest

作者：Moreau, Guillaume[1,2,3] Auty, David[4] Pothier, David[2] Shi, Jingning[1] Lu, Jun[5] Achim, Alexis[3] Xiang, Wei[1]

第一作者：Moreau, Guillaume

通信作者：Xiang, W[1]

机构：[1]Beijing Forestry Univ, Res Ctr Forest Management Engn, Sch Forestry, State Forestry & Grassland Adm, Beijing 100083, Peoples R China;[2]Univ Laval, Ctr Etud Foret, Dept Sci Bois & Foret, Pavillon Abitibi Price,2405 Rue Terrasse, Quebec City, PQ G1V 0A6, Canada;[3]Univ Laval, Ctr Rech Mat Renouvelables, Dept Sci Bois & Foret, Pavillon Abitibi Price,2405 Rue Terrasse, Quebec City, PQ G1V 0A6, Canada;[4]No Arizona Univ, Sch Forestry, Flagstaff, AZ 86011 USA;[5]Chinese Acad Forestry, Inst Forest Resource Informat Tech, Beijing 100091 15, Peoples R China

年份：2020

卷号：473

外文期刊名：FOREST ECOLOGY AND MANAGEMENT

收录：;EI(收录号：20202508857496);Scopus(收录号：2-s2.0-85086632099);WOS:【SCI-EXPANDED(收录号:WOS:000551979700037)】；

基金：The authors would like thank Dr. Xiangdong Lei and Jingouling Experimental Forest Farm field staff for the field work and field data. The support of the National Key Research and Development Plan, China (Grant No. 2017YFD0600403) and the National Natural Science Foundation of China, China (Grant No. 31500522) was also highly appreciated. We also sincerely thank two anonymous reviewers and Dr. Maria Elena Fernandez for their useful comments on the manuscript.

语种：英文

外文关键词：Stand growth dominance; Thinning; Tree-level allometric expectation; Stand growth dynamics; Mixed forest

摘要：In mixed forests, the presence of several tree species with various ecological characteristics leads to complex stand dynamics driven by the species-specific resource-use efficiencies that ultimately drive forest productivity. In this study, we applied the concept of stand growth dominance (GD), together with the growth rates of trees as a function of their allometric expectations (AE) under size-symmetric competition, as an analytical framework to identify the strong and weak contributors to the growth of thinned, mixed larch-spruce-fir stands. We used periodic surveys on approximately 2000 trees over a 25-year period following the application of four different intensities of thinning from below (TI): light (20% BA removed), moderate (30%), heavy (40%) and a control (0%). Results showed that stand GD became more negative with increasing TI and increased with increasing years since thinning except for the 20% TI, for which GD was always positive and had a small increase over time. Twenty-five years after treatment application, shade-intolerant larch trees contributed more to stand growth than their AE, particularly for medium- to large-sized trees, suggesting that they had acquired a large proportion of the available resources. Conversely, the shade tolerant coniferous and broad-leaved trees contributed less than their AE in all treatments, making them weak contributors to the overall stand growth. The analytical framework proposed in this study was useful to identify tree groups that were either weak or strong contributors to stand growth after partial cuffing. This information can be used to help prioritise trees for removal during partial cutting operations and to identify successional pathways that will lead to the composition of the future stand.