High potential of stable carbon sequestration in phytoliths of China's grasslands

doi:10.1111/gcb.16092

	High potential of stable carbon sequestration in phytoliths of China's grasslands
	Song, Zhaoliang ; Wu, Yuntao ; Yang, Yuanhe1 ; Zhang, Xiaodong ; Van Zwieten, Lukas 2; Bolan, Nanthi 3; Li, Zimin 4; Liu, Hongyan 5; Hao, Qian ; Yu, Changxun 6; Sun, Xiaole 7; Song, Alin 8; Wang, Wenying 9,10; Liu, Congqiang ; Wang, Hailong 11,12
	2022
发表期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
卷号	28 期号:8 页码:2736-2750
摘要	Phytolith carbon (C) sequestration plays a key role in mitigating global climate change at a centennial to millennial time scale. However, previous estimates of phytolith-occluded carbon (PhytOC) storage and potential in China's grasslands have large uncertainties mainly due to multiple data sources. This contributes to the uncertainty in predicting long-term C sequestration in terrestrial ecosystems using Earth System Models. In this study, we carried out an intensive field investigation (79 sites, 237 soil profiles [0-100 cm], and 61 vegetation assessments) to quantify PhytOC storage in China's grasslands and to better explore the biogeographical patterns and influencing factors. Generally, PhytOC production flux and soil PhytOC density in both the Tibetan Plateau and the Inner Mongolian Plateau had a decreasing trend from the Northeast to the Southwest. The aboveground PhytOC production rate in China's grassland was 0.48 x 10(6) t CO2 a(-1), and the soil PhytOC storage was 383 x 10(6) t CO2. About 45% of soil PhytOC was stored in the deep soil layers (50-100 cm), highlighting the importance of deep soil layers for C stock assessments. Importantly, the Tibetan Plateau had the greatest contribution (more than 70%) to the PhytOC storage in China's grasslands. The results of multiple regression analysis indicated that altitude and soil texture significantly influenced the spatial distribution of soil PhytOC, explaining 78.1% of the total variation. Soil phytolith turnover time in China's grasslands was mainly controlled by climatic conditions, with the turnover time on the Tibetan Plateau being significantly longer than that on the Inner Mongolian Plateau. Our results offer more accurate estimates of the potential for phytolith C sequestration from ecological restoration projects in degraded grassland ecosystems. These estimates are essential to parameterizing and validating global C models.
关键词	carbon sink China's grasslands ecological restoration phytolith-occluded carbon Tibetan Plateau turnover time
学科领域	Biodiversity Conservation ; Ecology ; Environmental Sciences
DOI	10.1111/gcb.16092
收录类别	SCI
语种	英语
WOS关键词	SOIL ORGANIC-CARBON ; OCCLUDED CARBON ; INNER-MONGOLIA ; CLIMATE-CHANGE ; SURFACE-PROPERTIES ; DISSOLVED SILICON ; NORTHERN CHINA ; PLANT-IMPACT ; STORAGE ; TIBETAN
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000748793500001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2486
资助机构	State's Key Project of Research and Development Plan of China [2016YFA0601002, 2017YFC0212703] ; National Natural Science Foundation of China [41930862, 42141014]
作者邮箱	zhaoliang.song@tju.edu.cn
引用统计	被引频次：22[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/28574
专题	植被与环境变化国家重点实验室
作者单位	1.Tianjin Univ, Sch Earth Syst Sci, Inst Surface Earth Syst Sci, Tianjin, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 3.NSW Dept Primary Ind, Wollongbar, NSW, Australia 4.Univ Western Australia, Sch Agr & Environm, Inst Agr, Crawley, WA, Australia 5.Univ Catholique Louvain UCLouvain, Earth & Life Inst, Soil Sci, Louvain La Neuve, Belgium 6.Peking Univ, Coll Urban & Environm Sci, Beijing, Peoples R China 7.Linnaeus Univ, Dept Biol & Environm Sci, Kalmar, Sweden 8.Stockholm Univ, Baltic Sea Ctr, Stockholm, Sweden 9.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Key Lab Crop Nutr & Fertilizat, Beijing, Peoples R China 10.Peoples Govt Qinghai Prov, Acad Plateau Sci & Sustainabil, Xining, Qinghai, Peoples R China 11.Beijing Normal Univ, Beijing, Qinghai, Peoples R China 12.Foshan Univ, Sch Environm & Chem Engn, Foshan, Guangdong, Peoples R China 13.Zhejiang A&F Univ, Coll Environm & Resource Sci, KeY Lab Soil Contaminat Bioremediat Zhejiang Prov, Hangzhou, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Song, Zhaoliang,Wu, Yuntao,Yang, Yuanhe,et al. High potential of stable carbon sequestration in phytoliths of China's grasslands[J]. GLOBAL CHANGE BIOLOGY,2022,28(8):2736-2750.
APA	Song, Zhaoliang.,Wu, Yuntao.,Yang, Yuanhe.,Zhang, Xiaodong.,Van Zwieten, Lukas.,...&Wang, Hailong.(2022).High potential of stable carbon sequestration in phytoliths of China's grasslands.GLOBAL CHANGE BIOLOGY,28(8),2736-2750.
MLA	Song, Zhaoliang,et al."High potential of stable carbon sequestration in phytoliths of China's grasslands".GLOBAL CHANGE BIOLOGY 28.8(2022):2736-2750.

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