Tracking soil carbon processes in two temperate forests at different successional stages using stable and radioactive carbon isotopes
Tracking soil carbon processes in two temperate forests at different successional stages using stable and radioactive carbon isotopes
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使用稳定和放射性碳同位素跟踪两个温带森林不同演替阶段的土壤碳过程
DOI：
10.1016/j.agee.2020.107143
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发表时间：
2020-12
影响因子：
6.6
通讯作者：
Wei-Yu Shi
中科院分区：
文献类型：
--
作者：
Kai-Bo Wang;Lei Deng;Dong-Rui Di;Xin-Hua He;Wei-Yu Shi
土壤碳剖面特征反映了植被和侵蚀的综合影响。然而，对土壤碳剖面及其受植被恢复和侵蚀影响的动态的定量评估仍然极其不足。在本研究中，我们综合了土壤和植被特性、稳定碳同位素组成和放射性碳年龄，以研究中国黄土高原上不同演替阶段的两种温带森林（杨林与栎林）的土壤碳过程。本研究的目的是（1）检查表土和底土中土壤有机碳（SOC）和土壤无机碳（SIC）的动态，（2）评估植被恢复和历史侵蚀对温带森林 SOC 和 SIC 变化的影响。我们发现，从杨树到栎树林，表土中的SOC储量增加，而下层土中的SOC储量下降，而SIC储量则表现出完全相反的变化趋势。凋落物生物量的显着增加提高了表土中的 SOC，而更强的历史侵蚀和启动效应将导致底土中的 SOC 沿演替过程减少。土壤剖面中 δ13C 和 Δ14C 的变化提供了证据表明，随着演替过程，表土中 SOC 周转率增加，但下层土中 SOC 周转率下降。过去一万年来，由于水土流失过程，胡杨林的SOC和SIC估计损失分别为26.2和64.1 Mg ha-1，栎树林的SOC和SIC损失为20.2和42.6 Mg ha-1。我们的结果表明，凋落物输入和侵蚀过程对研究区域表土和下土的碳动态有很大影响。
The profile characteristics of soil carbon reflect the combined effects of vegetation and erosion. However, the quantitative assessment of soil carbon in profile and its dynamics affected by vegetation restoration and erosion is still extremely inadequate. In this study, we synthesized soil and vegetation properties, stable carbon isotopic compositions, and radiocarbon ages to investigate the soil carbon processes in two temperate forests of different successional stages (Populusforest versusQuercusforest) on the Chinese Loess Plateau. The objectives of this study are to (1) examine the dynamics of soil organic carbon (SOC) and soil inorganic carbon (SIC) in the topsoil and subsoil, and (2) evaluate the effect of vegetation restoration and historical erosion on the changes of SOC and SIC in the temperate forests. We found that fromPopulustoQuercusforests, the SOC stock increased in the topsoil but declined in the subsoil, whereas the SIC stock exhibited a completely opposite variation trend. The significant increase in litter biomass enhanced the SOC in the topsoil, while a stronger historical erosion and priming effect would contribute to the decrease of SOC in the subsoil along succession. Changes in δ13C and Δ14C in the soil profile provided evidence that the turnover rate of SOC increase in the topsoil but decrease in the subsoil along succession. Over the past 10,000 years, due to soil erosion process, the estimated loss of the SOC and SIC was 26.2 and 64.1 Mg ha-1inPopulusforest and 20.2 and 42.6 Mg ha-1in theQuercusforest. Our results indicated that the litter input and erosion processes make great effect on the carbon dynamics in the topsoil and subsoil of the study region.
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土地利用变化后的土壤碳动态随温度和降水梯度的变化而变化：来自稳定同位素的证据。
影响因子：
11.6
作者：
Kerong Zhang;Haishan Dang;Quanfa Zhang;Xiaoli Cheng
通讯作者：
Xiaoli Cheng
黄土高原半干旱区两种典型森林土壤碳氮分布
影响因子：
6.2
作者：
Song BL;Yan MJ;Hou H;Guan JH;Shi WY;Li GQ;Du S
通讯作者：
Du S
DOI：
--
发表时间：
1985
期刊：
--
影响因子：
--
作者：
Dongsheng Liu
通讯作者：
Dongsheng Liu
影响因子：
9.7
作者：
Bingchang Tan;Jianbo Fan;Yuan-qiu He;S. Luo;X. Peng
通讯作者：
Bingchang Tan;Jianbo Fan;Yuan-qiu He;S. Luo;X. Peng
影响因子：
11.6
作者：
M. Torn;A. Lapenis;A. Timofeev;M. Fischer;B. Babikov;J. Harden
通讯作者：
M. Torn;A. Lapenis;A. Timofeev;M. Fischer;B. Babikov;J. Harden