globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12189
论文题名:
Soil carbon stocks and carbon sequestration rates in seminatural grassland in Aso region, Kumamoto, Southern Japan
作者: Toma Y.; Clifton-Brown J.; Sugiyama S.; Nakaboh M.; Hatano R.; Fernández F.G.; Ryan Stewart J.; Nishiwaki A.; Yamada T.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期:6
起始页码: 1676
结束页码: 1687
语种: 英语
英文关键词: δ13C ; C4 plant ; Miscanthus sinensis ; Plant phytolith ; Soil 14C dating ; Soil carbon sequestration
Scopus关键词: carbon ; carbon emission ; carbon isotope ; carbon sequestration ; carbon sink ; grassland ; isotopic fractionation ; mountain environment ; phytolith ; radiocarbon dating ; soil carbon ; article ; chemistry ; Japan ; Poaceae ; soil ; Carbon ; Japan ; Poaceae ; Soil ; Japan ; Kumamoto ; Kyushu ; Andropogoneae ; Miscanthus ; Miscanthus sinensis ; Paniceae
英文摘要: Global soil carbon (C) stocks account for approximately three times that found in the atmosphere. In the Aso mountain region of Southern Japan, seminatural grasslands have been maintained by annual harvests and/or burning for more than 1000 years. Quantification of soil C stocks and C sequestration rates in Aso mountain ecosystem is needed to make well-informed, land-use decisions to maximize C sinks while minimizing C emissions. Soil cores were collected from six sites within 200 km2 (767-937 m asl.) from the surface down to the k-Ah layer established 7300 years ago by a volcanic eruption. The biological sources of the C stored in the Aso mountain ecosystem were investigated by combining C content at a number of sampling depths with age (using 14C dating) and δ13C isotopic fractionation. Quantification of plant phytoliths at several depths was used to make basic reconstructions of past vegetation and was linked with C-sequestration rates. The mean total C stock of all six sites was 232 Mg C ha-1 (28-417 Mg C ha-1), which equates to a soil C sequestration rate of 32 kg C ha-1 yr-1 over 7300 years. Mean soil C sequestration rates over 34, 50 and 100 years were estimated by an equation regressing soil C sequestration rate against soil C accumulation interval, which was modeled to be 618, 483 and 332 kg C ha-1 yr-1, respectively. Such data allows for a deeper understanding in how much C could be sequestered in Miscanthus grasslands at different time scales. In Aso, tribe Andropogoneae (especially Miscanthus and Schizoachyrium genera) and tribe Paniceae contributed between 64% and 100% of soil C based on δ13C abundance. We conclude that the seminatural, C4-dominated grassland system serves as an important C sink, and worthy of future conservation. © 2013 Blackwell Publishing Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62427
Appears in Collections:影响、适应和脆弱性

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作者单位: Field Science Center for Northern Biosphere, Hokkaido University, Kita 11 Nishi 10, Kita-ku, Sapporo, Hokkaido, 060-0811, Japan; Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Plas Gogerddan, Aberystwyth, Dyfed, 060-0811, United Kingdom; Peleoenvironment Research Co., Ltd., 1417 Akae, Miyazaki, 880-0912, Japan; Kyusyu Biomass Forum, 5816, Miyaji, Ichinomiya, Aso, Kumamoto, 869-2612, Japan; Research Faculty of Agriculture, Hokkaido University, Kita 9 Nishi 9, Kita-ku, Sapporo, Hokkaido, 060-8589, Japan; Department of Crop Sciences, University of Illinois, 1102 S. Goodwin Ave, Urbana, IL, 61801, United States; Field Science Center, Faculty of Agriculture, University of Miyazaki, Miyazaki-shi, Miyazaki-ken, 889-2192, Japan; Faculty of Agriculture, Ehime University, Matsuyama, Ehime, 790-8566, Japan; Department of Plant and Wildlife Sciences, Brigham Young University, Provo, UT, 84602, United States

Recommended Citation:
Toma Y.,Clifton-Brown J.,Sugiyama S.,et al. Soil carbon stocks and carbon sequestration rates in seminatural grassland in Aso region, Kumamoto, Southern Japan[J]. Global Change Biology,2013-01-01,19(6)
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