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Millennial-scale hydroclimate control of tropical soil carbon storage 期刊论文
NATURE, 2020, 581 (7806) : 63-+
作者:  Lam, Tommy Tsan-Yuk;  Jia, Na;  Zhang, Ya-Wei;  Shum, Marcus Ho-Hin;  Jiang, Jia-Fu;  Zhu, Hua-Chen;  Tong, Yi-Gang;  Shi, Yong-Xia;  Ni, Xue-Bing;  Liao, Yun-Shi;  Li, Wen-Juan;  Jiang, Bao-Gui;  Wei, Wei;  Yuan, Ting-Ting;  Zheng, Kui;  Cui, Xiao-Ming;  Li, Jie;  Pei, Guang-Qian
收藏  |  浏览/下载:58/0  |  提交时间:2020/05/13

Over the past 18,000 years, the residence time and amount of soil carbon stored in the Ganges-Brahmaputra basin have been controlled by the intensity of Indian Summer Monsoon rainfall, with greater carbon destabilization during wetter, warmer conditions.


The storage of organic carbon in the terrestrial biosphere directly affects atmospheric concentrations of carbon dioxide over a wide range of timescales. Within the terrestrial biosphere, the magnitude of carbon storage can vary in response to environmental perturbations such as changing temperature or hydroclimate(1), potentially generating feedback on the atmospheric inventory of carbon dioxide. Although temperature controls the storage of soil organic carbon at mid and high latitudes(2,3), hydroclimate may be the dominant driver of soil carbon persistence in the tropics(4,5)  however, the sensitivity of tropical soil carbon turnover to large-scale hydroclimate variability remains poorly understood. Here we show that changes in Indian Summer Monsoon rainfall have controlled the residence time of soil carbon in the Ganges-Brahmaputra basin over the past 18,000 years. Comparison of radiocarbon ages of bulk organic carbon and terrestrial higher-plant biomarkers with co-located palaeohydrological records(6) reveals a negative relationship between monsoon rainfall and soil organic carbon stocks on a millennial timescale. Across the deglaciation period, a depletion of basin-wide soil carbon stocks was triggered by increasing rainfall and associated enhanced soil respiration rates. Our results suggest that future hydroclimate changes in tropical regions are likely to accelerate soil carbon destabilization, further increasing atmospheric carbon dioxide concentrations.


  
Long-term deepened snow promotes tundra evergreen shrub growth and summertime ecosystem net CO2 gain but reduces soil carbon and nutrient pools 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (8) : 3508-3525
作者:  Christiansen, Casper T.;  Lafreniere, Melissa J.;  Henry, Gregory H. R.;  Grogan, Paul
收藏  |  浏览/下载:17/0  |  提交时间:2019/04/09
Arctic  carbon cycling  climate change  deciduous shrub  snowfence  soil microbes  vegetation changes  winter  
Control of "blue carbon" storage by mangrove ageing: Evidence from a 66-year chronosequence in French Guiana 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (6) : 2325-2338
作者:  Walcker, Romain;  Gandois, Laure;  Proisy, Christophe;  Corenblit, Dov;  Mougin, Eric;  Laplanche, Christophe;  Ray, Raghab;  Fromard, Francois
收藏  |  浏览/下载:18/0  |  提交时间:2019/04/09
biomass  carbon  chronosequence  coastal changes  forest ageing  mangrove  soil  
Differential soil microbial community responses to the linkage of soil organic carbon fractions with respiration across land-use changes 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2018, 409: 170-178
作者:  Ren, Chengjie;  Wang, Tao;  Xu, Yadong;  Deng, Jian;  Zhao, Fazhu;  Yang, Gaihe;  Han, Xinhui;  Feng, Yongzhong;  Ren, Guangxin
收藏  |  浏览/下载:21/0  |  提交时间:2019/04/09
Land-use changes  Afforested ecosystem  Illumina sequencing  Soil microbial community  Soil respiration components  Dissolved organic carbon  
Input-driven versus turnover-driven controls of simulated changes in soil carbon due to land-use change 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2017, 12 (8)
作者:  Nyawira, S. S.;  Nabel, J. E. M. S.;  Brovkin, V.;  Pongratz, J.
收藏  |  浏览/下载:3/0  |  提交时间:2019/04/09
land-use change  soil carbon changes  factor separation  input-driven  turnover-driven