Climate and vegetation together control the vertical distribution of soil carbon, nitrogen and phosphorus in shrublands
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Climate and vegetation together control the vertical distribution of soil carbon, nitrogen and phosphorus in shrublands in China Yanpei Guo & Minwei Jiang & Qing Liu & Zongqiang Xie & Zhiyao Tang
Received: 6 May 2020 / Accepted: 18 August 2020 # Springer Nature Switzerland AG 2020
Abstract Aims Carbon (C), nitrogen (N) and phosphorus (P) in soil are characterized by decreasing patterns with soil depth. However, these patterns and their driving factors have rarely been investigated in shrublands. Methods We conducted extensive sampling of the top 100 cm of soil in 1120 shrublands across China to measure the soil organic C (SOC), total N (STN) and total P (STP) concentrations and densities. Results We found that in shrublands, the geometric means (and geometric standard errors) of SOC, STN and STP concentrations were 5.62 (0.09), 0.66 (0.07), Yanpei Guo and Minwei Jiang contributed equally to this work.
and 0.31 (0.07) mg g−1, respectively, and those of their densities were 5.46 (0.08), 0.67 (0.08), and 0.30 (0.08) kg m−3, respectively. The decrease along soil depth for nutrients could be parameterized by a power function. The rates of decrease with depth differed between shrubland types and were negatively correlated with temperature but positively correlated with biomass. Climatic factors tended to have a relatively stronger effect than vegetation factors on the vertical distribution patterns of soil nutrients. Conclusions Our findings reveal nutrient limitations in shrublands in terms of the total pools, suggest the necessity of soil protection for vegetation conservation and restoration, and provide an important supplement for the accurate prediction of terrestrial element cycles.
Responsible Editor: Zucong Cai Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11104-020-04688-w) contains supplementary material, which is available to authorized users.
Keywords Carbon cycle . Climate . Nitrogen cycle . Phosphorus cycle . Soil depth . Vegetation
Y. Guo : M. Jiang : Z. Tang (*) Institute of Ecology, Key Laboratory for Earth Surface Processes and College of Urban and Environmental Sciences, Peking University, Beijing 100871, China e-mail: [email protected]
Introduction
Q. Liu Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China Z. Xie (*) Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China e-mail: [email protected]
Soil is the largest carbon (C) pool in terrestrial ecosystems (Jobbágy and Jackson 2000; Jackson et al. 2017), and 56% of the total soil organic C (SOC) (within the top 3 m) is located in the top 1 m of soil (Kern 1994). CO2 emitted by soil respiration accounts for a large proportion of the terrestrial C cycle (Post et al. 1982). Global changes such as nitrogen deposition and climate warming can influence the soil C pool and further the global C cycle thr
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