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-Ping6,7,8; Luo, Tao8; Chen, Jingyi8; Zhan, Zhao -Wen5; Song, Zhiguang6,8; Xing, Lantian1; He, Ding2,3,4 |
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2023-09-20 |
| 卷号 | 634页码:14 |
| 关键词 | Hydrogen isotope Plant leaf wax n -alkanes Surface sediments Water salinity Geomorphological settings |
| ISSN号 | 0009-2541 |
| DOI | 10.1016/j.chemgeo.2023.121589 |
| 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. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001027828600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74453]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | He, Ding |
| 作者单位 | 1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Hong Kong Univ Sci & Technol, Ctr Ocean Res Hong Kong & Macau, Hong Kong, Peoples R China 4.Hong Kong Univ Sci & Technol, Dept Ocean Sci, Hong Kong, Peoples R China 5.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 6.Guangdong Ocean Univ, Shenzhen Res Inst, Shenzhen 518120, Peoples R China 7.Jinan Univ, Guangdong Hongkong Macau Joint Lab Collaborat Inno, Guangzhou 510632, Peoples R China 8.Guangdong Ocean Univ, Coll Chem & Environm Sci, Zhanjiang 524088, Peoples R 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,2023,634:14. |
| 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,634,14. |
| 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):14. |
入库方式： OAI收割
来源：广州地球化学研究所
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