Influence of salinity on hydrogen isotope fractionation of n-alkanes in mangrove leaves and surface sediments: A comparison across various geomorphological settings
文献类型：期刊论文
| 作者 | Wang, Yao-Ping3,4,5; Luo, Tao4; Chen, Jingyi4; Zhan, Zhao -Wen6; Song, Zhiguang4,5; Xing, Lantian7; He, Ding1,2 |
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2023-09-20 |
| 卷号 | 634期号:-页码:- |
| 关键词 | Hydrogen isotope Plant leaf wax n -alkanes Surface sediments Water salinity Geomorphological settings |
| ISSN号 | 0009-2541 |
| 英文摘要 | Increasing attention has recently been paid to hydrogen isotope ratios of mangrove lipids due to their potential for reconstructing past salinity and hydrology. This proxy is based on several observations that net 2H/1H fractionation, & epsilon;n-alkane/water, between mangrove leaf waxes and surface water, increases with surface water salinity. However, the extent to which hydrogeomorphic conditions, on a regional scale, affect the hydrogen isotope fractionations of n-alkanes in mangrove trees and sediments is not yet understood. This study aimed to assess the robustness of negative & epsilon;n-alkane/water - salinity for six mangrove species and adjacent surface sediments from the Zhanjiang mangrove across different hydrogeomorphic settings. The results indicated that a significant inverse relationship exists between & epsilon;n-C31/water and & epsilon;n-C33/water and salinity for all samples from the three fringe and basin/interior mangroves, with & epsilon;n-C31/water decreasing by -2.57 & PLUSMN; 0.87 %o ppt- 1 and & epsilon;n-C33/water decreasing by -3.64 & PLUSMN; 1.14 %o ppt- 1. These trends, as well as interspecific differences among mangrove species, could be attributed to biochemical changes in response to salt stress, such as using different proportions of amino acids and soluble carbohydrates as compatible solutes. In contrast, the relationship between sedimentary & epsilon;n-alkane/water and salinity differed significantly across hydrogeomorphic conditions and land-use changes, possibly due to variations in hydrology and input of allochthonous organic matter. A comparison of fitted parameters of linear regressions among riverine, fringe, and interior mangroves suggests that the slop and intercept describing the linear relationship between sedimentary & epsilon;C27-33/water of basin/interior mangroves and salinity are generally consistent with that of the corresponding mangrove trees. This suggests that the basin/interior mangroves and their sedimentary deposits may be better candidates for paleoenvironmental reconstruction using hydrogen isotope ratios of long-chain n-alkanes. |
| 学科主题 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001027828600001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35461]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Department of Ocean Science and Center for Ocean Research in Hong Kong and Macau, The Hong Kong University of Science and Technology, Hong Kong, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Science, Wuhan 430071, China 3.Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality,Jinan University,Guangzhou 510632, China 4.College of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, China 5.Shenzhen Research Institute of Guangdong Ocean University, Shenzhen 518120, China 6.State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China 7.Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China |
| 推荐引用方式 GB/T 7714 | Wang, Yao-Ping,Luo, Tao,Chen, Jingyi,et al. Influence of salinity on hydrogen isotope fractionation of n-alkanes in mangrove leaves and surface sediments: A comparison across various geomorphological settings[J]. CHEMICAL GEOLOGY,2023,634(-):-. |
| APA | Wang, Yao-Ping.,Luo, Tao.,Chen, Jingyi.,Zhan, Zhao -Wen.,Song, Zhiguang.,...&He, Ding.(2023).Influence of salinity on hydrogen isotope fractionation of n-alkanes in mangrove leaves and surface sediments: A comparison across various geomorphological settings.CHEMICAL GEOLOGY,634(-),-. |
| MLA | Wang, Yao-Ping,et al."Influence of salinity on hydrogen isotope fractionation of n-alkanes in mangrove leaves and surface sediments: A comparison across various geomorphological settings".CHEMICAL GEOLOGY 634.-(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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