DOI: 10.1016/j.geoderma.2019.114107
论文题名: Whole soil acidification and base cation reduction across subtropical China
作者: Yu Z. ; Chen H.Y.H. ; Searle E.B. ; Sardans J. ; Ciais P. ; Peñuelas J. ; Huang Z.
刊名: Geoderma
ISSN: 167061
出版年: 2020
卷: 361 语种: 英语
英文关键词: Base cations
; Deep soil
; Nitrogen deposition
; Soil pH
; Warming
; Whole soil acidification
Scopus关键词: Acidification
; Ecosystems
; Forestry
; Positive ions
; Sensitivity analysis
; Tropics
; Base cations
; Deep soils
; Nitrogen deposition
; Soil acidifications
; Soil pH
; Warming
; Soils
; acid deposition
; acidification
; acidity
; cation
; global change
; sensitivity analysis
; soil profile
; topsoil
; warming
; water availability
; China
英文摘要: Soil acidity plays a central role in the diversity and function of terrestrial ecosystems. Recent studies have revealed that acid deposition has acidified topsoil over time. However, uncertainties relating to how the acidity of the entire soil profile, including deep soil, responds to multiple global change drivers make it challenging to predict the effects of the ongoing global change on soil functions. Using data from 2952 observations of 200 montane sites in subtropical China, we show that the soil pH decreased over the last 60 years across the whole soil profile (0–150 cm), though there was less reduction in deep soils. The contents of exchangeable Ca2+ and Mg2+ decreased at the same rate, or more quickly, in the deep soil than topsoil. Soil pH and base cations decreased more in forests and shrublands at low elevations, but less in mountain meadows at high elevations. Our sensitivity analysis indicated that regional N deposition, S deposition, warming, and decreasing water availability have contributed to the temporal decreases in pH and base cations in natural ecosystems across tropical and subtropical China. The results extend the previous findings of changes in acidity in surface soil layers and demonstrate that deep soils of natural systems across a large area can be acidified over a few decades. Our results suggest that ongoing global changes are reducing the base nutrients across the entire soil profile, and thus, the diversity and functionality of subtropical forests. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158791
Appears in Collections: 气候变化与战略
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作者单位: Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou, 350007, China; School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China; Faculty of Natural Resources Management, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario P7B 5E1, Canada; CSIC, Global Ecology Unit CREAF-CSIC-UAB, Barcelona, Spain; CREAF, Cerdanyola del Vallès, 08193, Catalonia, Spain; Laboratoire des Sciences du Climat et de l'Environnement, IPSL, Gif-sur-Yvette, France
Recommended Citation:
Yu Z.,Chen H.Y.H.,Searle E.B.,et al. Whole soil acidification and base cation reduction across subtropical China[J]. Geoderma,2020-01-01,361