Impact factors of dissolved organic carbon and the transport in a river-lake continuum in the Tibet Plateau of China
Impact factors of dissolved organic carbon and the transport in a river-lake continuum in the Tibet Plateau of China
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青藏高原河湖连续体溶解有机碳及其迁移的影响因素
DOI：
10.1016/j.jhydrol.2019.124202
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发表时间：
2019-12
影响因子：
6.4
通讯作者：
Chong Fang
中科院分区：
文献类型：
--
作者：
Zhidan Wen;Kaishan Song;Ge Liu;Yingxin Shang;Junbin Hou;Lili Lyu;Chong Fang
溶解有机碳（DOC）是内陆沃茨碳的重要组成部分，在全球尺度的碳循环中起着至关重要的作用。了解DOC的变化和湖泊中的主导因素之间的联系是在更大的尺度上估计其浓度的关键。本研究以青藏高原湖泊为研究对象，分析了湖泊溶解有机碳（DOC）浓度的特征及其影响因素。这些封闭湖泊的DOC总平均浓度为21.80 ± 30.82 mg/L（mean ± S.D.）。高于开放湖泊（F = 174.1，p <0.05）。通过对湖泊DOC与景观、水质、气候因子的相关性分析，探讨了青藏高原湖泊DOC浓度变化的潜在驱动因子。多元回归模型表明，78%的湖泊DOC浓度可以用景观、坡度和景观优势度指数（LDI）的Shannon均匀度指数（SHEI）解释，其中SHEI对DOC浓度变化的解释最为显著。分析了青海湖流域河湖相互作用过程中DOC浓度的变化。青海湖水体DOC浓度高于周边河流。坡度和土壤有机质密度是导致湖泊DOC含量高于河流的主要原因。景观对湖泊DOC有显著影响，主导因子为SHEI。本次调查结果进一步补充了高原湖泊内陆沃茨DOC的信息。该研究将有助于进一步了解DOC在河湖生态系统中的迁移规律。
As a significant fraction of carbon in inland waters, dissolved organic carbon (DOC) plays a crucial role in carbon cycling at a global scale. Understanding the linkages between variations in DOC and its dominant factors in lakes is critical for estimating its concentration on a larger scale. This study characterized the concentrations of DOC in the lakes of Tibet Plateau and explored the major underlying influencing factors. The overall mean concentration of DOC in these closed lakes had a mean value of 21.80 ± 30.82 mg/L (mean ± S.D.) and was higher than open lakes (F = 174.1,p< 0.05). The potential drivers for the concentration of DOC in the lakes of Tibet Plateau were conducted by the correlation analysis of DOC with the observed landscape, water quality variables, and climatic factors. The multiple regression model showed that 78% of DOC concentrations across the lakes could be explained by Shannon evenness index (SHEI) of landscape, slope, and landscape dominance index (LDI), of which SHEI explained the most substantial variations for the concentration of DOC. The changes in the concentrations of DOC in river-lake interaction were analyzed in Qinghai Lake watershed. The concentration of DOC in the Qinghai Lake water was higher than the surrounding rivers. Slope and the density of soil organic matter (SOM) in the Qinghai Lake watershed were responsible for the higher DOC in lake than rivers. The landscape had a significant influence on DOC in the lakes, and the dominant factor was SHEI. The results observed from this investigation further supplement the information of DOC in the inland waters with plateau lakes. Further, this study is expected to improve the understanding of the transport of DOC in the river-lake ecosystem.
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影响因子：
5.2
作者：
Irena F. Creed;F. Beall;T. Clair;P. J. Dillon;R. Hesslein
通讯作者：
Irena F. Creed;F. Beall;T. Clair;P. J. Dillon;R. Hesslein
中国水库CDOM吸收特征及其区域和年代联系
影响因子：
5.8
作者：
Shang YX;Song KS;Wen ZD;Lyu LL;Zhao Y;Fang C;Zhang B
通讯作者：
Zhang B
影响因子：
1.6
作者：
Yuko Sugiyama;Aya Anegawa;T. Kumagai;Y. Harita;T. Hori;M. Sugiyama
通讯作者：
Yuko Sugiyama;Aya Anegawa;T. Kumagai;Y. Harita;T. Hori;M. Sugiyama
影响因子：
4.5
作者：
Zhang, Yunlin;Zhang, Enlou;Qin, Boqiang
通讯作者：
Qin, Boqiang
影响因子：
3.2
作者：
Shreeram Inamdar;N. O'Leary;Myron J. Mitchell;J. T. Riley
通讯作者：
Shreeram Inamdar;N. O'Leary;Myron J. Mitchell;J. T. Riley