文献类型：期刊文献

英文题名：Plant species diversity is driven by soil base cations under acid deposition in desert coal-mining region in northwestern China

作者：Li, Chunhuan[1,2,3,4] Wang, Bin[5] Fang, Zhao[6] Yu, Hailong[1,2,3,4] Huang, Juying[1,2,3,4]

第一作者：Li, Chunhuan

通信作者：Yu, HL[1];Huang, JY[1];Yu, HL[2];Huang, JY[2];Yu, HL[3];Huang, JY[3];Yu, HL[4];Huang, JY[4]

机构：[1]Ningxia Univ, Sch Ecol & Environm, Yinchuan 750021, Peoples R China;[2]Breeding Base State Key Lab Land Degradat & Ecol R, Yinchuan 750021, Peoples R China;[3]Minist Educ, Key Lab Restorat & Reconstruct Degraded Ecosyst No, Yinchuan 750021, Peoples R China;[4]Ningxia Univ, Sch Geog & Planning, Yinchuan 750021, Peoples R China;[5]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Peoples R China;[6]Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Peoples R China

年份：2022

卷号：145

外文期刊名：ECOLOGICAL INDICATORS

收录：;EI(收录号：20224713155395);Scopus(收录号：2-s2.0-85142312308);WOS:【SCI-EXPANDED(收录号:WOS:000935575000006)】；

基金：This work was financially supported by the Natural Science Foun-dation of Ningxia (2022AAC02012) , the National Natural Science Foundation of China (32160277) , and the Western Young Scholars Program of Chinese Academy of Sciences (XAB2019AW03) . We would like to thank Wanwan Zhu, Yixin Xu, Cui Han, Xiaoyue Wang, Bing Li for their help in field survey and laboratory analysis. We also would like to thank Editage ( www.editage.cn) for English language editing.

语种：英文

外文关键词：Biodiversity; C; N; P ecological stoichiometry; Desert; Industrial source of acid emission; Moderate -severe alkaline soil

摘要：Given that the rate of acid deposition tends to be stable or even decline in most regions of China, the rapid development of the coal industry accelerated the rates of S and N deposition in Northwest China. Although desert plants are sparse, they play an essential role in maintaining ecosystem functions. However, few studies have evaluated whether and how acid deposition affects plant species diversity in deserts, especially those with moderate and severe alkalinity. In this study, three coal-fired power plants located at the Ningdong Energy and Chemical Industry Base in Northwest China were selected as the monitoring sites. From 2019 to 2021, we analyzed the chemical compositions of the bulk deposition of rainfall and dustfall, plant species diversity, and the main factors influencing plant diversity along a 2000 m sampling distance gradient. There were no apparent trends in annual deposition of SO42- (19.67-82.28 kg ha- 1 yr- 1), NO3- (2.83-11.42 kg ha- 1 yr- 1), NH4+ (1.91-5.20 kg ha-1 yr- 1), and inorganic N (4.91-16.11 kg ha- 1 yr- 1) along the sampling gradient. The SO42deposition was lower than the S deposition critical load in the study area, whereas the N deposition exceeded the acceptable N deposition of soils. The base cation (BC) neutralized the input acidity of the bulk deposition, in which Ca2+ played a key role. There were no significant differences in the Patrick richness index (2-8), ShannonWiener diversity index (0.45-1.73), and Pielou evenness index (0.56-0.99) along the sampling gradient, whereas an increasing trend was observed in the Simpson dominance index (0.13-0.72). C:N:P ecological stoichiometry in plant-microbe-soil could not highly explain the variation in plant diversity. S, N, and BC deposition had minor direct effects on plant diversity. However, S and BC deposition could indirectly influence plant diversity through their influence on soil BCs and bulk deposition pH. The results indicate that S deposition increases bulk deposition acidity, reduces soil BC concentration, and improves soil alkaline environments, thus enhancing plant diversity in the studied deserts. Current N deposition does not greatly affect plant diversity. However, long-term observations are still required to thoroughly evaluate the effect of N deposition..