文献类型：期刊文献

英文题名：Multiple mechanisms drive biodiversity-ecosystem service multifunctionality but the dominant one depends on the level of multifunctionality for natural forests in northeast China

作者：Lan, Jie[1,2] Lei, Xiangdong[1] He, Xiao[1] Gao, Wenqiang[1] Guo, Hong[1]

第一作者：Lan, Jie

通信作者：Lei, XD[1]

机构：[1]Chinese Acad Forestry, Inst Forest Resource Informat Tech, Key Lab Forest Management & Growth Modelling, Natl Forestry & Grassland Adm, Beijing 100091, Peoples R China;[2]Beijing Forestry Univ, Coll Forestry, Beijing 100083, Peoples R China

年份：2023

卷号：542

外文期刊名：FOREST ECOLOGY AND MANAGEMENT

收录：;EI(收录号：20232214151146);Scopus(收录号：2-s2.0-85160012724);WOS:【SCI-EXPANDED(收录号:WOS:001007325000001)】；

基金：This research was funded by the Key Research and Development Program of China (Grant No. 2022YFD2200500) and the Forestry Public Welfare Scientific Research Project (Grant No. 201504303) .

语种：英文

外文关键词：Biodiversity; Ecosystem service multifunctionality; Green soup hypothesis; Mass ratio; Niche complementarity; Stand biomass

摘要：Biodiversity plays a key role in maintaining and regulating ecosystem multifunctionality (EMF). However, there remains a knowledge gap on the ecological mechanisms behind the relationship between biodiversity and EMF (BEMF), and how these mechanisms vary with EMF gradients, especially at large scale. We used the dataset of 2224 permanent sample plots in Jilin Province, northeast China to test three BEMF mechanisms and their var-iations with EMF, including mass ratio, ecological niche complementarity and the green soup hypotheses. Biodiversity metrics were taxonomic, structural, phylogenetic, functional diversity and functional identity. EMF was composed of five services: water retention, soil conservation, carbon storage, stand productivity and soil fertility maintenance. EMF was measured using both the averaging (as the average of the standardized values of all services) and threshold (as the number of services passed a threshold) approach. Totally 23 piecewise structural equation models (pSEMs) were developed for EMF with the threshold level ranging from 5% to 95% by an interval of 5%. Results showed that stand biomass had strong positive effect on EMF. Stand structural diversity had significant direct and indirect effects on EMF, but taxonomic, functional diversity and functional identity only had significant direct and indirect effects on EMF at low thresholds. Stand age had significant direct effects on EMF and indirectly enhanced EMF through stand structural diversity and biomass. Our results provided strong evidence that EMF was driven simultaneously by mass ratio, niche complementarity and green soup hypotheses, but the dominant mechanism was dependent on EMF level. Generally, the green soup hypothesis played more important role in explaining EMF. Recommendations for maintaining high functional and structural diversity and large biomass for maximizing EMF were discussed for forest management.