Relative importance of climatic and edaphic factors as drivers of plantδ^(15)N along a longitudinal transect

作     者：Xianzhao Liu Tianhao Wang and Qing Su 

作者机构：School of Geosciences and Spatial InformationHunan University of Science and TechnologyXiangtanHunanChina 

出 版 物：《Ecosystem Health and Sustainability》 (生态系统健康与可持续性（英文）)

年 卷 期：2022年第8卷第1期

页      面：94-108页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 090301[农学-土壤学] 

基　　金：This research was financed by the Natural Science Foundation of Hunan Province(No.2020JJ4296) 

主　　题：Relative importance nitrogen isotopes climatic variables edaphic variables L.chinensis 

摘      要：Many studies have shown that climatic and edaphic factors influence the variations in nitrogen isotopes(δ^(15)N)in terrestrial ***,the relative importance of co-varying climatic and edaphic controls on plantδ^(15)N remains somewhat *** address this issue,regional-scale plant(***)and soil samples were collected along a longitudinal transect across the temperate grasslands in northern *** influences of climatic and edaphic factors on the plantδ^(15)N were disentangled using the variable importance in projection(VIP)*** found that the climatic and edaphic variables explained 52.4%and 31.2%,respectively,of the variation in plantδ^(15)*** mean annual precipitation(MAP),soil N,and mean annual temperature(MAT)were the most important variables,but the soil water content(SWC),aridity index(AI),and soil clay content were also important *** soil pH and soil C:N ratios were identified as unimportant ***,a high-performance model for simulating plantδ^(15)N values was constructed based on the important variables(VIP0.8).Further investigations should focus on the effects of the interaction between the climatic and edaphic variables on the N cycles in the temperate grasslands to provide more reliable predictions of plantδ^(15)N.