Investigating the spatial variability of dissolved organic matter quantity and composition in Lake Wuliangsuhai
Investigating the spatial variability of dissolved organic matter quantity and composition in Lake Wuliangsuhai
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乌梁素海溶解有机物数量和组成的空间变异研究
DOI：
10.1016/j.ecoleng.2013.10.032
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发表时间：
2014
影响因子：
3.8
通讯作者：
Deng, Yu
中科院分区：
文献类型：
--
作者：
He, Lian-sheng;Li, Qiang;Yuan, Dong-hai;Deng, Yu
溶解有机物（DOM）是碳循环的重要组成部分，也是控制水环境中各种地球化学和生态过程的关键驱动因素。研究了干旱半干旱地区乌梁素海水体中DOM的数量和组成的空间变异性。该研究可为类似复杂湿地或湖泊DOM动态评估提供有用的工具，为生态环境治理和恢复提供支持。结果表明，利用激发发射矩阵光谱结合平行因子分析（PARAFAC），可以识别出乌梁素海水体中的5种荧光组分，包括3种类腐殖酸组分（C1、C2和C4）和2种类蛋白质组分（C3和C5）。各组分的空间变异表现出优势荧光组分的差异。水和孔隙水中的类蛋白质组分C5和类腐殖酸组分C2占优势。C3和C4是0-10 cm沉积物中的主要荧光组分。在10-20 cm的沉积物中，C1和C3分别是主要的类腐殖酸和类蛋白质组分。PARAFAC-PCA显示了四个PCA因子。类腐殖酸组分C2和C4同时显示正因子1负荷。因子2主要由陆源和海相类腐殖酸组分C1解释。本地的，类Escherichan，荧光成分C3，显示出积极的因子3加载。在其他三个因子中具有低因子加载的内源性酪氨酸样荧光组分C5显示出极高的因子4加载。EEM-PARAFAC与PCA相结合，显示不同的贡献，陆地与本地DOM源的不同区域的湿地，这表明在人类活动的差异控制DOM动态。
Dissolved organic matter (DOM) is an important component of the carbon cycle and a critical driver in controlling a variety of biogeochemical and ecological processes in aquatic environments. We reported the spatial variability of DOM quantity and composition which collected from Lake Wuliangsuhai in arid and semi-arid region. This study could serve as a useful tool to assess the dynamics of DOM in similar complex wetlands or lakes and provide a support for ecological environment governance and restoration. The results showed that five fluorescent components, including three humic-like (C1, C2 and C4), and two protein-like components (C3 and C5), can be identified by excitation emission matrix (EEM) spectra combined with parallel factor analysis (PARAFAC) in Lake Wuliangsuhai. The spatial variation of the components showed the difference in the dominant fluorescent component. There were dominant protein-like component C5 and humic-like component C2 in water and pore water. Components C3 and C4 were the main fluorescent components in 0–10 cm sediments. In 10–20 cm sediments, C1 and C3 were the dominant humic-like and protein-like component respectively. The PARAFAC–PCA displayed four PCA factors. The humic-like components C2 and C4 concurrently showed positive factor 1 loadings. Factor 2 was mainly explained by terrestrial and marine humic-like component C1. The autochthonous, tryptophan-like, fluorescent component C3, showed positive factor 3 loadings. The autochthonous, tyrosine-like, fluorescence component C5, having a low factor loading in other three factors, showed extremely high factor 4 loading. The EEM–PARAFAC combined with PCA showed varying contributions of terrestrial versus autochthonous DOM sources for the different regions in the wetland, suggesting that differences in human activities control DOM dynamics.
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影响因子：
6.9
作者：
Wang Zhi-gang;Liu Wen-qing;Liu Jian-guo
通讯作者：
Liu Jian-guo
影响因子：
11.4
作者：
C. Stedmon;D. Thomas;M. Granskog;H. Kaartokallio;S. Papadimitriou;H. Kuosa
通讯作者：
C. Stedmon;D. Thomas;M. Granskog;H. Kaartokallio;S. Papadimitriou;H. Kuosa
影响因子：
12.8
作者：
N. Maie;N. Scully;O. Pisani;R. Jaffé
通讯作者：
N. Maie;N. Scully;O. Pisani;R. Jaffé
影响因子：
6.8
作者：
Xu Guo;Dong-hai Yuan;Qiang Li;Jin-yuan Jiang;Feng-Xian Chen;Hui Zhang
通讯作者：
Xu Guo;Dong-hai Yuan;Qiang Li;Jin-yuan Jiang;Feng-Xian Chen;Hui Zhang
影响因子：
4
作者：
Benner, Ronald;Kaiser, Karl
通讯作者：
Kaiser, Karl