文献类型：期刊文献

英文题名：Characteristics of water dissolved organic matter in Zoige alpine wetlands, China

作者：Wang, Jinzhi[1,2] Hu, Zhengyi[3] Cui, Lijuan[1,2] Yang, Weishan[4] Li, Wei[1,2] Lei, Yinru[1,2] Li, Jing[1,2] Zhai, Xiajie[1,2] Zhao, Xinsheng[1,2] Wang, Rumiao[1,2]

第一作者：王金枝

通信作者：Cui, LJ[1];Cui, LJ[2]

机构：[1]Chinese Acad Forestry, Inst Wetland Res, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Beijing Key Lab Wetland Serv & Restorat, Beijing 100091, Peoples R China;[3]Univ Chinese Acad Sci, Sino Danish Ctr Educ & Res, Beijing 100049, Peoples R China;[4]Chinese Acad Environm Planning, Ctr Ecoenvironm Accounting, Beijing 100041, Peoples R China

年份：2024

卷号：11

期号：1

外文期刊名：CHEMICAL AND BIOLOGICAL TECHNOLOGIES IN AGRICULTURE

收录：;Scopus(收录号：2-s2.0-85202718841);WOS:【SCI-EXPANDED(收录号:WOS:001303583400002)】；

基金：Not applicable.

语种：英文

外文关键词：Dissolved organic matter (DOM); Alpine wetland; Three-dimensional fluorescence spectroscopy; Spectral indices; Zoige plateau

摘要：BackgroundDissolved organic matter (DOM) plays a significant role in the biogeochemical cycle of crucial elements in aquatic ecosystem. However, it is still not clear on the spectral characteristics of water DOM in different types of alpine wetlands, which have less anthropogenic influences and intensive ultraviolet radiation. Here, we collected 107 water samples from marsh, lake, and river wetlands in the Zoige plateau, China, and analyzed the chemical characteristics, compositions, and potential sources of chromophoric DOM by combining UV-vis spectroscopy and excitation-emission matrix fluorescence spectroscopy coupled with parallel factor analysis (EEMs-PARAFAC).ResultsUVC and UVA fulvic-like substances were the prevailing fluorescence components in water DOM, which accounted for 23.74-71.59% and 16.76-30.01% of the total fluorescence intensity, respectively. Compared with the lake and river wetlands, fluoresce intensities of UVC and UVA fulvic-like substances in DOM were higher in marsh wetland. Marsh wetlands possessed the highest SUVA254, E2/E3, E2/E4, and E4/E6 of DOM, suggesting higher humification degree, higher relative molecular nominal size, and higher aromaticity. And the E2/E4 ratios in most water samples were higher than 12, indicating water DOM was mainly derived from autochthonous sources in alpine wetlands.ConclusionsWetland types strongly affected the spectral characteristics of water DOM in Zoige plateau. These findings may be beneficial for sustainable management of alpine wetlands.