Distribution and stable isotopic compositions of organic carbon in surface sediments in hyporheic zone of karst springs
Distribution and stable isotopic compositions of organic carbon in surface sediments in hyporheic zone of karst springs
复制标题
岩溶泉潜流带表层沉积物有机碳分布及稳定同位素组成
DOI：
10.1007/s12665-016-5672-8
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发表时间：
2016-05
影响因子：
2.8
通讯作者：
Huang Siyu
中科院分区：
文献类型：
--
作者：
Guo Fang;Wang Wenke;Jiang Guanghui;Huang Siyu
岩溶潜流带内物质和能量的频繁交换会导致地下水环境的迅速退化。岩溶泉潜流带的划分及其营养盐交换的定量化是岩溶泉的一个难点。为评价岩溶池表层沉积物中有机质的来源及其环境指示意义，对45个岩溶池表层沉积物进行了粒度、总有机碳、总氮和稳定同位素的测定。C/N比值表明，83%的有机质为内源来源，但地表水回流携带的有机质贡献不容忽视。池尾存在一个高C/N区。这是由于地表河流在极高水位时回流造成的。有机质的δ 13 C值为−29.27 ‰ ~ −22.40 ‰，与当地水生植物的δ 13 C值一致。结合元素分析、同位素组成、粒度分布和人类活动等资料，对该水库进行了详细的水环境功能分区，特别是确定了活动性潜流带。我们的数据表明，在岩溶潜流带中，有机质的性质和分布是复杂的和动态的。有机地球化学可能在水环境演化中发挥更重要的作用。
Frequently exchange of substance and energy in karst hyporheic zone may cause rapidly degeneration of groundwater environment. Hyporheic zone delineation and its nutrients exchange quantification are quite difficult in karst spring. To evaluate the source of organic matter (OM) and its environmental indication, 45 surface sediments were collected in a karst pool to determine the content of grain size, total organic carbon, total nitrogen, and stable isotope. C/N ratios showed that 83 % of OM is autochthonous source, but the contribution of OM carried by surface water backflow cannot be ignored. A high C/N ratios zone could be found in the tail of the pool. This is ascribed to surface river backflowing in extremely high water level. δ13C of OM ranged from −29.27 to −22.40 ‰, and they were consistent with isotope of local hydrophyte in the spring. Combined with elemental analysis, isotopic composition, grain size distribution and human activities, detailed water environmental function zones in the pool were defined; especially, the active hyporheic zone was determined. Our data reveal that the nature and distribution of OM are complex and dynamic in a karst hyporheic zone. Organic biogeochemistry may play more important role and drive the evolution of aquatic environment.
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影响因子：
1.3
作者：
M. Paoletti;M. Beggio;A. L. Dreon;Alberto Pamio;T. Gomiero;M. Brilli;L. Dorigo;G. Concheri;A. Squartini;A. Engel
通讯作者：
M. Paoletti;M. Beggio;A. L. Dreon;Alberto Pamio;T. Gomiero;M. Brilli;L. Dorigo;G. Concheri;A. Squartini;A. Engel
DOI：
10.18307/20010402
发表时间：
2001
期刊：
Journal of Lake Science
影响因子：
--
作者：
Y. Yong;Fang Nian-qiao;Hu Chaoyong;Nie Haogang;Qi Zun-li
通讯作者：
Y. Yong;Fang Nian-qiao;Hu Chaoyong;Nie Haogang;Qi Zun-li
影响因子：
12.1
作者：
Lamb, AL;Wilson, GP;Leng, MJ
通讯作者：
Leng, MJ
影响因子：
64.8
作者：
KRISHNAMURTHY, RV;BHATTACHARYA, SK;KUSUMGAR, S
通讯作者：
KUSUMGAR, S
DOI：
10.1016/j.scitotenv.2015.06.033
发表时间：
2016
期刊：
The Science of the total environment
影响因子：
--
作者：
P. López;J. López-Tarazón;J. P. Casas‐Ruiz;M. Pompêo;J. Ordóñez;I. Muñoz
通讯作者：
P. López;J. López-Tarazón;J. P. Casas‐Ruiz;M. Pompêo;J. Ordóñez;I. Muñoz