文献类型：期刊文献

英文题名：Changes in ecological stoichiometry and nutrient resorption in Castanopsis hystrix plantations along an urbanization gradient in the lower subtropics

作者：Li, Feifan[1] Sun, Bing[1] Shi, Zhaowan[1] Pei, Nancai[1]

第一作者：Li, Feifan

通信作者：Sun, B[1];Pei, NC[1]|[a0005fbb966ed4fbddfd2]孙冰;

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Peoples R China

年份：2021

卷号：32

期号：6

起止页码：2323-2331

外文期刊名：JOURNAL OF FORESTRY RESEARCH

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000613987100001)】；

基金：The work was supported by the National Key Research and Development Program of China (2017YFC0505606), National Natural Science Foundation of China (31570594, 31600449), and Forestry Science and Technology Innovation Project of Guangdong Province (2021-2023).

语种：英文

外文关键词：Ecological stoichiometry; Nutrient cycling; Plant-environment interaction; Subtropical forest; Urban– rural gradient

摘要：The stoichiometry of carbon, nitrogen and phosphorous in plants can reflect the interactions between plants and their environment. The interplay between plant nutrients, climatic factors, and soil properties and the underlying regulatory mechanisms are pillars of ecology but remain underexplored. In this study of plant C-N-P stoichiometry and nutrient resorption in Castanopsis hystrix groves in three cities (Guangzhou, Zhongshan, and Lechang) that represent an urban-rural gradient in Guangdong Province, South China, we explored potential relationships among NO2 concentrations, diameter at breast height (DBH), and resident human population. Mean annual temperature, mean annual precipitation, insolation duration per year, and the human resident population differed significantly among the three cities. Soil C-N-P was always highest in suburban Lechang, and the concentration of NO2 was highest in urban Guanghzou (55.33 +/- 0.67 mu g m(-3)) and positively correlated with the resident population and leaf N:P. Our findings suggest that C-N-P stoichiometry of C. hystrix was better explained by NO2 than by soil C-N-P stoichiometry and that nutrient resorption was better explained by leaf nutrients and DBH than by NO2 and soil stoichiometry. Our study supports the hypothesis that rapid urbanization influences NO2 concentrations and microclimate, which may jointly change the stoichiometry of plant nutrients in the forest ecosystems.