Response of anaerobic mineralization of different depths peat carbon to warming on Zoige plateau
Response of anaerobic mineralization of different depths peat carbon to warming on Zoige plateau
复制标题
若尔盖高原不同深度泥炭碳厌氧矿化对增温的响应
DOI：
10.1016/j.geoderma.2018.10.031
复制
发表时间：
2019-03
期刊：
影响因子：
6.1
通讯作者：
Yang Gang
中科院分区：
文献类型：
--
作者：
Liu Liangfeng;Chen Huai;Jiang Lin;Zhan Wei;Hu Ji;He Yixin;Liu Jianliang;Xue Dan;Zhu Dan;Zhao Chuan;Yang Gang
气候变暖极大地改变了泥炭地的碳循环，那里的土壤是水饱和的，全年都处于厌氧状态。然而，很少有人知道的泥炭地碳的厌氧矿化对全球变暖的响应，特别是当考虑到土壤的差异，从地下水位以上（AWT）和地下水位以下（BWT）。通过对若尔盖高原100cm土柱取样，研究了土壤碳厌氧矿化随温度和深度的变化。升温显著促进了碳厌氧矿化，但各深度的增幅不同。CO2-C和CH 4-C对增温的响应随深度不同而变化：表层土壤CO2-C和CH 4-C排放量均增加，且增幅较大;深层土壤CO2-C排放量增加，但增幅较小，CH 4-C排放量减少。基质有效性影响碳厌氧矿化速率和途径。深层土壤中大量的抗性碳降低了CO2的增量，改变了CH 4的产生途径。泥炭碳厌氧矿化的温度敏感性随深度而变化，反映了土壤基质在整个深度上的不均匀分布。AWT土壤的温度敏感性高于BWT土壤，因为AWT土壤具有大量的简单碳和较高的微生物/酶活性。BWT土壤是气候变暖引起的碳排放量和碳总量增加的主要贡献者。因此，在泥炭地的管理中，应加强对土壤全层的研究，特别是AWT土壤的温度敏感性和BWT土壤对碳排放的贡献。
Warming greatly reshapes carbon cycle of peatlands where soil is water saturated with anaerobic condition prevailing all the year round. However, little is known about the response of anaerobic mineralization of peatlands carbon to global warming, especially when considering the difference of soil from above water table (AWT) and below water table (BWT). This study measured variations in soil carbon anaerobic mineralization as a function of warming and depth by sampling 100-cm soil columns in Zoige plateau. Warming enhanced carbon anaerobic mineralization significantly with different increments among the whole depths. The response of CO2-C and CH4-C to warming varied with depth: at surface soil, both CO2-C and CH4-C emission increased with higher increment; at deep soil, CO2-C emission increased with small increment and CH4-C emission decreased. Substrate availability influenced carbon anaerobic mineralization rate and pathway. Substantial resistant carbon at deep soil lowered CO2increment and varied CH4production pathway. The temperature sensitivity of peat carbon anaerobic mineralization varied with depth, suggesting the heterogeneous distribution of soil substrate among the whole depths. AWT soil was higher in temperature sensitivity than BWT soil for the substantial simple carbon and higher microbial/enzyme activity at AWT. BWT soil was a major contributor of the amount of carbon emission and the total increased carbon caused by warming. Further, for the management of peatlands, we should conduct advanced research by focusing more towards the soil of whole depth, especially on the temperature sensitivity of AWT soil and the contribution to total carbon emission of BWT soil.
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影响因子：
4.2
作者：
Roussel EG;Cragg BA;Webster G;Sass H;Tang X;Williams AS;Gorra R;Weightman AJ;Parkes RJ
通讯作者：
Parkes RJ
影响因子：
11.6
作者：
C. Voigt;R. E. Lamprecht;M. Marushchak;S. Lind;A. Novakovskiy;M. Aurela;P. Martikainen;C. Biasi
通讯作者：
C. Voigt;R. E. Lamprecht;M. Marushchak;S. Lind;A. Novakovskiy;M. Aurela;P. Martikainen;C. Biasi
DOI：
10.1016/j.scitotenv.2012.03.069
发表时间：
2012-06
期刊：
The Science of the total environment
影响因子：
--
作者：
L. V. D. van den Berg;L. Shotbolt;M. Ashmore
通讯作者：
L. V. D. van den Berg;L. Shotbolt;M. Ashmore
影响因子：
11.6
作者：
James T. Weedon;George A. Kowalchuk;R. Aerts;J. V. van Hal;R. V. van Logtestijn;N. Taş;Wilfred F. M. Röling-Wilf
通讯作者：
James T. Weedon;George A. Kowalchuk;R. Aerts;J. V. van Hal;R. V. van Logtestijn;N. Taş;Wilfred F. M. Röling-Wilf
DOI：
10.1002/9780470686652.eae526
发表时间：
2015-06
期刊：
--
影响因子：
--
作者：
K. Shine
通讯作者：
K. Shine