IB-CAS  > 植被与环境变化国家重点实验室
Compositional Characteristics of Fluvial Particulate Organic Matter Exported From the World's Largest Alpine Wetland
Dai, Guohua; Zhu, Erxiong1; Liu, Zongguang1; Wang, Yiyun1; Zhu, Shanshan1; Wang, Simin1; Ma, Tian1; Jia, Juan1; Wang, Xin1; Hou, Shengjie2; Fu, Pingqing1,2; Peterse, Francien3; Feng, Xiaojuan1
2019
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN2169-8953
Volume124Issue:9Pages:2709-2727
AbstractWetlands are hot spots for particulate organic matter (POM) supply into rivers, which link the land-ocean transfer in the global carbon cycle. However, the source, composition, and seasonal variability of POM carried by wetland-draining rivers are poorly constrained. Here we combine bulk and source-specific biomarker analyses to investigate the fluvial POM biogeochemistry of the Black and White Rivers draining from the Zoige wetland. We find that POM was dominated by terrestrial organic matter including high-molecular-weight (HMW) lipids, branched glycerol dialkyl glycerol tetraethers, and lignin phenols. However, fluvial POM was rich in HMW lipids and poor in lignin phenols compared to the catchment soils, possibly due to hydrodynamic sorting and dissolution processes. While lignin phenol concentrations were higher in the wet season, HMW lipid concentrations were lower. Additionally, lignin phenols increased with total suspended solids, while HMW lipids decrease. These contrasts imply an enhanced input of lignin-rich particles from soil surface layers in the wet season, diluting HMW lipids. Compared with that in other rivers around the world with a higher forest coverage in the catchment, POM in the Black and White Rivers draining grass-dominated wetlands had a much higher ratio of HMW fatty acids to lignin phenols. Our results represent a benchmark study highlighting compositional characteristics of fluvial POM exported from the Zoige wetland and the divergent behavior of molecular components during fluvial transfer. Such information is vital for assessing future changes in the Zoige wetland, given its high vulnerability to climatic and land use changes.
Keywordparticulate organic matter composition source seasonal variation river Zoige wetland
Subject AreaEnvironmental Sciences ; Geosciences, Multidisciplinary
DOI10.1029/2019JG005231
Indexed BySCI
Language英语
WOS KeywordDIALKYL GLYCEROL TETRAETHERS ; TERRESTRIAL CARBON TRANSFER ; AMAZON-RIVER ; MULTIMOLECULAR TRACERS ; SEDIMENTARY CARBON ; WATER-COLUMN ; FATTY-ACIDS ; LIPIDS ; LIGNIN ; SOILS
WOS Research AreaEnvironmental Sciences & Ecology ; Geology
WOS IDWOS:000490596100001
PublisherAMER GEOPHYSICAL UNION
SubtypeArticle
Publication PlaceWASHINGTON
EISSN2169-8961
Funding OrganizationChinese National Key Development Program for Basic Research [2017YFC0503902, 2015CB954201] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41503073, 41422304, 41773067] ; International Partnership Program of Chinese Academy of Sciences [151111KYSB20160014] ; China Exchange Program of the Royal Netherlands Academy of Arts and Sciences (KNAW) [530-6CDP17]
Corresponding Author Emailxfeng@ibcas.ac.cn
OAGreen Published
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ibcas.ac.cn/handle/2S10CLM1/19463
Collection植被与环境变化国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing, Peoples R China
4.Univ Utrecht, Dept Earth Sci, Utrecht, Netherlands
Recommended Citation
GB/T 7714
Dai, Guohua,Zhu, Erxiong,Liu, Zongguang,et al. Compositional Characteristics of Fluvial Particulate Organic Matter Exported From the World's Largest Alpine Wetland[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2019,124(9):2709-2727.
APA Dai, Guohua.,Zhu, Erxiong.,Liu, Zongguang.,Wang, Yiyun.,Zhu, Shanshan.,...&Feng, Xiaojuan.(2019).Compositional Characteristics of Fluvial Particulate Organic Matter Exported From the World's Largest Alpine Wetland.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,124(9),2709-2727.
MLA Dai, Guohua,et al."Compositional Characteristics of Fluvial Particulate Organic Matter Exported From the World's Largest Alpine Wetland".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 124.9(2019):2709-2727.
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