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

doi:10.1038/ncomms15972

NWIPB OpenIR

	Iron-mediated soil carbon response to water-table decline in an alpine wetland
	Wang, Yiyun 1,2; Wang, Hao 3,4; He, Jin-Sheng 3,4,5; Feng, Xiaojuan 1,2
	2017-06-26
发表期刊	NATURE COMMUNICATIONS
卷号	8
文章类型	Article
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.
WOS标题词	Science & Technology
DOI	10.1038/ncomms15972
关键词[WOS]	PHENOL OXIDASE ACTIVITY ; DISSOLVED ORGANIC-MATTER ; EXTRACELLULAR ENZYME-ACTIVITY ; TROPICAL FOREST SOILS ; SORPTIVE STABILIZATION ; NITROGEN DEPOSITION ; OXIDATION-PRODUCTS ; SUMMER DROUGHT ; PLANT-TISSUES ; DECOMPOSITION
收录类别	SCI
语种	英语
项目资助者	Chinese National Key Development Program for Basic Research(2015CB954201 ; National Natural Science Foundation of China(41422304 ; National Thousand Young Talents recruiting plan of China ; 2014CB954003) ; 31370491)
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000404030200001
引用统计	被引频次：121[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/7084
专题	中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Peking Univ, Coll Urban & Environm Sci, Dept Ecol, Beijing 100871, Peoples R China 4.Peking Univ, Minist Educ, Key Lab Earth Surface Proc, 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).