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Iron-mediated soil carbon response to water-table decline in an alpine wetland
Wang, Yiyun1,2; Wang, Hao3,4; He, Jin-Sheng3,4,5; Feng, Xiaojuan1,2
2017-06-26
Source PublicationNATURE COMMUNICATIONS
Volume8
SubtypeArticle
AbstractThe 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 HeadingsScience & Technology
DOI10.1038/ncomms15972
WOS KeywordPHENOL OXIDASE ACTIVITY ; DISSOLVED ORGANIC-MATTER ; EXTRACELLULAR ENZYME-ACTIVITY ; TROPICAL FOREST SOILS ; SORPTIVE STABILIZATION ; NITROGEN DEPOSITION ; OXIDATION-PRODUCTS ; SUMMER DROUGHT ; PLANT-TISSUES ; DECOMPOSITION
Indexed BySCI
Language英语
Funding OrganizationChinese 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 Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000404030200001
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/7084
Collection中国科学院西北高原生物研究所
Affiliation1.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
Recommended Citation
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).
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