文献类型：期刊文献

英文题名：Plant Functional Traits Are the Mediators in Regulating Effects of Abiotic Site Conditions on Aboveground Carbon Stock-Evidence From a 30 ha Tropical Forest Plot

作者：Bu, Wensheng[1,2,3] Huang, Jihong[2,3] Xu, Han[4] Zang, Runguo[2,3] Ding, Yi[2,3] Li, Yide[4] Lin, Mingxian[4] Wang, Jinsong[5] Zhang, Cancan[1]

第一作者：Bu, Wensheng

通信作者：Zang, RG[1];Zang, RG[2]

机构：[1]Jiangxi Agr Univ, Coll Forestry, Jiulianshan Natl Observat & Res Stn Chinese Fores, Collaborat Innovat Ctr Jiangxi Typ Trees Cultivat, Nanchang, Jiangxi, Peoples R China;[2]Chinese Acad Forestry, Inst Forest Ecol Environm & Protect, State Forestry Adm, Key Lab Forest Ecol & Environm, Beijing, Peoples R China;[3]Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing, Jiangsu, Peoples R China;[4]Chinese Acad Forestry, Res Inst Trop Forestry, Key Lab State Forestry Adm Trop Forestry Res, Guangzhou, Guangdong, Peoples R China;[5]Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China

年份：2019

卷号：9

外文期刊名：FRONTIERS IN PLANT SCIENCE

收录：;Scopus(收录号：2-s2.0-85062706767);WOS:【SCI-EXPANDED(收录号:WOS:000455308300001)】；

基金：This study was supported by the Fundamental Research Funds for the Central Non-profit Research Institution of CAF (CAFBB2017ZB004), the National Natural Science Foundation of China (31760134) and Natural Science Foundation of Jiangxi, China (20171BAB214032).

语种：英文

外文关键词：biodiversity and ecosystem function; plant economics spectrum; response-effect framework; specific leaf area; wood density

摘要：Understanding the relative contribution of abiotic and biotic factors to the formation of ecosystem functioning across scales is vital to evaluate ecosystem services. Here, we elucidate the effects of abiotic site conditions (i.e., soil and topographic properties) and plant functional traits on variations of stand aboveground carbon (AGC) stock in an old-growth tropical montane rain forest. The response-effect framework in functional ecology is adopted in examining how plant functional traits respond to environmental changes and affect ecosystem functioning. We measured specific leaf area and wood density of 270 woody plant species and estimated stand AGC stocks in a 30-ha forest plot. The relationships among environmental factors (ENVIRONMENT), community-weighted means of functional traits (TRAITS) and stand AGC stocks across nested spatial scales were disentangled by structural equation modeling. The results showed that the stands composed of 'acquisitive' species (high specific leaf area and low wood density) had low AGC, whereas stands composed of 'conservative' species (low specific leaf area and high wood density) had high AGC. TRAITS responded to ENVIRONMENT and affected AGC directly. ENVIRONMENT had an indirect effect on AGC through its direct effect on TRAITS. TRAITS were more important than ENVIRONMENT in driving variations of AGC. The effects of TRAITS on AGC increased, while the effects of ENVIRONMENT on AGC decreased with the increase of spatial scales in the tropical montane rain forest. Our study suggests that plant functional traits are the mediators in regulating effects of abiotic site conditions on ecosystem functions.