Differential responses of forest strata species richness to paleoclimate and forest structure

Autor: Shuyue Wang, Fei Lin, Jinghua Yu, Borja Jiménez-Alfaro, Ji Ye, Xugao Wang, Shaoan Pan, Emma J. Sayer, Shuai Fang, Anvar Sanaei, Zhanqing Hao, Zuoqiang Yuan
Přispěvatelé: National Natural Science Foundation of China, Chinese Academy of Sciences
Rok vydání: 2021
Předmět:
Zdroj: Digital.CSIC. Repositorio Institucional del CSIC
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ISSN: 0378-1127
DOI: 10.1016/j.foreco.2021.119605
Popis: Regional factors, such as historical and contemporary climate conditions, and local factors, such as vegetation structural attributes, can influence current patterns of plant species richness but their relative roles remain unknown, particularly across forest strata. Here, we used a multi-scale survey of temperate forest plots across a large region of Northeast China to explore the relative importance of environmental factors (paleoclimate, contemporary climate, topography and anthropogenic disturbance) and forest structural attributes (stem abundance, stand basal area and tree size variation) on tree, shrub, and herb species richness. Although environmental and forest structural factors all played a role in explaining plant species richness patterns, their relative roles varied in direction and magnitude depending on forest stratum. Tree species richness increased with the magnitude of change in temperature since the Last Glacial Maximum (Anomaly) but declined with increasing magnitude of change in precipitation (Anomaly). By contrast, herb species richness declined with increasing Anomaly but increased with Anomaly, highlighting contrasting processes for tree and herb species richness driven by paleoclimate. Contemporary climate played a lesser role in explaining species richness, but tree species richness increased with diurnal temperature range, shrub species richness increased with the climatic moisture index, and herb species richness increased with both climatic variables. Herb species richness also increased with disturbance intensity, whereas tree and shrub richness declined. Overall, plant species richness increased significantly with all forest structural attributes, except for stem abundance, which had a negative effect on herb species richness, and forest structure mediated the linkages between plant species richness and disturbance or climate. The pronounced influence of paleoclimate on forest plant species richness highlights the potential threat of current climate change for forest diversity. Together, simultaneous consideration of past and current climate as well as forest structural attributes could improve our understanding of the complex mechanisms shaping patterns of plant species richness across forest strata.
This work was supported by the National Natural Science Foundation of China (31961133027) the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB31030000) Key Research Program of Frontier Sciences (ZDBS-LY-DQC019), the LiaoNing Revitalization Talents Program (XLYC1807039) and K.C. Wong Education Foundation.
Databáze: OpenAIRE
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