DOI: 10.1016/j.geoderma.2020.114200
论文题名: Storage of soil phytoliths and phytolith-occluded carbon along a precipitation gradient in grasslands of northern China
作者: Zhang X. ; Song Z. ; Hao Q. ; Yu C. ; Liu H. ; Chen C. ; Müller K. ; Wang H.
刊名: Geoderma
ISSN: 167061
出版年: 2020
卷: 364 语种: 英语
英文关键词: Mean annual precipitation
; Mongolian Plateau
; Soil phytolith
; Stability
Scopus关键词: Arid regions
; Convergence of numerical methods
; Ecosystems
; Organic carbon
; Photosynthesis
; Phytoplankton
; Regression analysis
; Soils
; Global climate changes
; Long-term C sequestrations
; Mean annual precipitation
; Mongolians
; Multiple regression analysis
; Net primary productivity
; Precipitation gradients
; Terrestrial ecosystems
; Climate change
; carbon sequestration
; climate change
; ecosystem function
; global climate
; grassland
; phytolith
; precipitation (climatology)
; soil carbon
; spatial distribution
; steppe
; terrestrial ecosystem
; China
; Mongolian Plateau
英文摘要: Climatic factors including mean annual precipitation (MAP) significantly influence the carbon (C) cycle in terrestrial ecosystems and Earth overall. Phytolith-occluded carbon (PhytOC) is an important C sequestration mechanism and as such plays a vital role in global long-term C sequestration. Understanding the spatial variability in the storage of soil phytoliths and PhytOC and its relationship with climate is critical for evaluating the impact of global climate change on terrestrial ecosystem functions. However, little is known about the responses of soil phytoliths and PhytOC to MAP in grassland ecosystems. This study sampled soil from 24 natural, semi-arid steppe sites along a 2,500 km transect with a precipitation gradient of 243–481 mm yr−1 in northern China. We investigated the influence of precipitation on the spatial distributions of soil phytoliths and PhytOC storage. Storage of soil phytoliths in bulk soil (0–100 cm depth) ranged from 21.3 ± 0.4 to 88.4 ± 20.3 t ha−1 along the precipitation gradient. Amounts of soil phytoliths and PhytOC storage were significantly and positively correlated with MAP. Multiple regression analysis revealed that phytolith storage in bulk soil was best predicted by MAP (R = 0.5) and soil organic carbon (SOC, R = 0.4), with these two variables accounting for about 58% of the total variation observed. Considering the forecasted increase in MAP in the Inner Mongolian steppe due to climate change, and the strong influence of MAP on the annual net primary productivity (ANPP) and related soil PhytOC input from litter decomposition in this region, we expect that ecosystem primary productivity will increase from deserts to meadow steppe and thereby promote soil PhytOC storage. These findings have important implications for understanding the dynamics of soil phytoliths, and predicting the impacts of global climate change on ecosystem functions and management practices in the East Asian steppe ecosystems. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158445
Appears in Collections: 气候变化与战略
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作者单位: Institute of the Surface-Earth System Science, Tianjin University, Tianjin, China; Department of Biology and Environmental Science, Linnaeus University, Kalmar, SE-39182, Sweden; College of Urban and Environmental Sciences, Peking University, Peking, 100871, China; The NZ Institute for Plant & Food Research Limited, Ruakura Research Centre, Private Bag 3123, Hamilton, New Zealand; School of Environmental and Chemical Engineering, Foshan University, Foshan, Guangdong 528000, China; School of Environmental and Resource Sciences, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
Recommended Citation:
Zhang X.,Song Z.,Hao Q.,et al. Storage of soil phytoliths and phytolith-occluded carbon along a precipitation gradient in grasslands of northern China[J]. Geoderma,2020-01-01,364