Iron-mediated soil carbon response to water-table decline in an alpine wetland

doi:10.1111/njb.01581

CORC > 植物研究所 > 中国科学院植物研究所 > 植被与环境变化国家重点实验室

	Iron-mediated soil carbon response to water-table decline in an alpine wetland
	Wang, Yiyun 2; Wang, Hao ; He, Jin-Sheng ; Feng, Xiaojuan 2
刊名	NATURE COMMUNICATIONS
	2017
卷号	8
ISSN号	2041-1723
DOI	10.1111/njb.01581
文献子类	Article
英文摘要	The tremendous reservoir of soil organic carbon (SOC) in wetlands is being threatened by water-table decline (WTD) globally. However, the SOC response to WTD remains highly uncertain. Here we examine the under-investigated role of iron (Fe) in mediating soil enzyme activity and lignin stabilization in a mesocosm WTD experiment in an alpine wetland. In contrast to the classic 'enzyme latch' theory, phenol oxidative activity is mainly controlled by ferrous iron [Fe(II)] and declines with WTD, leading to an accumulation of dissolvable aromatics and a reduced activity of hydrolytic enzyme. Furthermore, using dithionite to remove Fe oxides, we observe a significant increase of Fe-protected lignin phenols in the air-exposed soils. Fe oxidation hence acts as an 'iron gate' against the 'enzyme latch' in regulating wetland SOC dynamics under oxygen exposure. This newly recognized mechanism may be key to predicting wetland soil carbon storage with intensified WTD in a changing climate.
学科主题	Plant Sciences
出版地	LONDON
WOS关键词	PHENOL OXIDASE ACTIVITY ; DISSOLVED ORGANIC-MATTER ; EXTRACELLULAR ENZYME-ACTIVITY ; TROPICAL FOREST SOILS ; SORPTIVE STABILIZATION ; NITROGEN DEPOSITION ; OXIDATION-PRODUCTS ; SUMMER DROUGHT ; PLANT-TISSUES ; DECOMPOSITION
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000418789800015
资助机构	Chinese National Key Development Program for Basic Research [2015CB954201, 2014CB954003] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41422304, 31370491] ; National Thousand Young Talents recruiting plan of China
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/22325]
专题	植被与环境变化国家重点实验室
作者单位	1.Peking Univ, Minist Educ, Key Lab Earth Surface Proc, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Peking Univ, Coll Urban & Environm Sci, Dept Ecol, Beijing 100871, Peoples R China 5.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yiyun,Wang, Hao,He, Jin-Sheng,et al. Iron-mediated soil carbon response to water-table decline in an alpine wetland[J]. NATURE COMMUNICATIONS,2017,8.
APA	Wang, Yiyun,Wang, Hao,He, Jin-Sheng,&Feng, Xiaojuan.(2017).Iron-mediated soil carbon response to water-table decline in an alpine wetland.NATURE COMMUNICATIONS,8.
MLA	Wang, Yiyun,et al."Iron-mediated soil carbon response to water-table decline in an alpine wetland".NATURE COMMUNICATIONS 8(2017).