Carbon concentrations and their stable isotopic signatures in the upper Han River, China
Carbon concentrations and their stable isotopic signatures in the upper Han River, China
复制标题
中国汉江上游的碳浓度及其稳定同位素特征
DOI：
10.1007/s11356-019-04568-6
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发表时间：
2019-03
影响因子：
5.8
通讯作者：
Zhang Quanfa
中科院分区：
文献类型：
--
作者：
Han Xi;Cheng Xiaoli;Li Siyue;Yuan Jie;Zhang Quanfa
河流生态系统中的碳（C）在调节陆地碳库向海洋和大气的转化中起着重要作用，因此了解河流生态系统中C的动态变化对理解全球碳循环至关重要。在这里，我们调查了溶解无机碳（DIC），颗粒有机碳（POC）浓度的季节和空间变化及其碳同位素特征（即，δ 13 C-DIC，δ 13 C-POC）。溶解有机碳（DOC），总悬浮固体（TSS），和其他理化参数，包括水温，pH值，溶解氧（DO），电导率（EC）也进行了测量。结果表明，POC浓度在丰水期和主河道中显著偏高，DIC浓度没有表现出明显的时空变异性。DIC、POC与DOC呈正相关，与水温、TSS呈正相关。δ 13 C-DIC和δ 13 C-POC具有明显的季节和空间变化，δ 13 C-DIC在枯水期显著偏高，δ 13 C-POC在支流和枯水期显著偏高。δ 13 C-DIC与TSS浓度呈负相关，δ 13 C-POC与水温、DIC和DOC浓度呈负相关。我们的研究结果表明，水温和TSS是调节C浓度的主要因素，其稳定同位素特征主要受水生光合作用和河流呼吸作用的影响。
Carbon (C) in riverine ecosystems play an important role in regulating terrestrial carbon reservoir to the oceans and atmosphere, thus, understanding C dynamics in riverine ecosystem are essential for understanding global carbon cycle. Here, we investigated the seasonal and spatial variations in concentrations of dissolved inorganic carbon (DIC), particulate organic carbon (POC), and their carbon isotopic signatures (i.e., δ13C-DIC, δ13C-POC) in the tributaries and main channel of the upper Han River, China. Dissolved organic carbon (DOC), total suspended solid (TSS), and other physicochemical parameters including water temperature, pH, dissolved oxygen (DO), and electrical conductivity (EC) were also measured. We found that POC concentration was significantly higher in wet season and in main channel, and DIC concentration did not show significant spatiotemporal variability. DIC and POC were positively related to DOC, and they were also positively correlated with water temperature and TSS, respectively. δ13C-DIC and δ13C-POC had significant seasonal and spatial variations, and δ13C-DIC was significantly higher in dry season and δ13C-POC was significantly higher in the tributaries and in dry season. δ13C-DIC was negatively related to the TSS concentration, while δ13C-POC was negatively correlated with water temperature, DIC, and DOC concentrations. Our results suggest that water temperature and TSS are the primary factors in regulating C concentrations, and their stable isotopic signatures are primarily affected by aquatic photosynthesis and riverine respiration in the upper Han River, China.
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影响因子：
5.4
作者：
J. Constantz;C. Eddy-Miller;J. Wheeler;H. Essaid
通讯作者：
J. Constantz;C. Eddy-Miller;J. Wheeler;H. Essaid
影响因子：
5.2
作者：
B. Voss;K. Wickland;G. Aiken;R. Striegl
通讯作者：
B. Voss;K. Wickland;G. Aiken;R. Striegl
DOI：
10.1016/j.scitotenv.2004.02.017
发表时间：
2004-08
期刊：
The Science of the total environment
影响因子：
--
作者：
Kent W. Warnken;P. Santschi
通讯作者：
Kent W. Warnken;P. Santschi
悬浮有机物中碳和氮的稳定同位素比：长江运输路径的季节和空间动态
影响因子：
3.7
作者：
Gao, Lei;Li, Daoji;Ishizaka, Joji
通讯作者：
Ishizaka, Joji
DOI：
10.5860/choice.26-4499
发表时间：
1988
期刊：
--
影响因子：
--
作者：
W. Dreybrodt
通讯作者：
W. Dreybrodt