An insight into effect of soil salinity on vegetation dynamics in the exposed seafloor of the Aral Sea
文献类型：期刊论文
| 作者 | Duan, Zihao4; Wang, Xiaolei; Sun, Lin; Zhou, Meilin2,3; Luo, Yi |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2024-11-15 |
| 卷号 | 951页码:175615 |
| 关键词 | Aral Sea Exposed seafloor Vegetation NDVI Soil salinity |
| DOI | 10.1016/j.scitotenv.2024.175615 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | The desiccation of the Aral Sea has precipitated significant ecological degradation, resulting in the progressive development of vegetation on the exposed seafloor. Soil salinity emerges as a pivotal determinant in this ecological succession process. Employing a comprehensive methodology integrating multi-source datasets spanning from 1986 to 2023, this study elucidates the temporal changes in vegetation dynamics and soil salinity levels. Satellite imagery (Landsat-4/5/7/8), field soil samplings, hydrological and topographic data were analyzed to understand their interactions with regression analysis. The results reveal a consistent increasing trend in the Normalized Difference Vegetation Index (NDVI) across the exposed seabed since 1986. However, NDVI demonstrates a non-linear relationship with elevation in the North Aral Sea region. Interestingly, NDVI levels near an elevation of 42 m on the exposed seabed approximate those observed during the pre-recession period in the 1960s. Conversely, in the South Aral Sea region, NDVI demonstrates a linear upward trend with increasing elevation. Furthermore, the spatial distribution of soil salinity on the exposed seabed was delineated with linear regression analysis. It revealed water salinity levels at the time of sea recession can serve as a proxy for soil salinity in cases where direct soil data is unavailable. Through establishing a robust correlation between NDVI and soil salinity, the range of stable NDVI values on the exposed seabed was delineated. Lastly, three hypothetical scenarios of rising water levels were considered to evaluate changes in stable NDVI across different elevation gradients. If the water level returns to 45 m, the salt-desert area would decrease by 4.5 x 104 4 km2, 2 , accounting for 23 % of the total area in 1960. At this water level, it is anticipated that lake hydrological conditions and ecological environments may restore to those observed in 1981. This study provides a long-term perspective on environmental changes in the Aral Sea region by integrating multiple data sources and analytical methods. The predictive insights from the scenario analysis offer valuable guidance for future water management and ecological restoration efforts. Compared with previous studies, it presents a detailed and comprehensive picture of the interplay between vegetation dynamics and soil salinity, highlighting the critical impact of water level changes on the region's ecosystem. |
| WOS关键词 | WATER ; GROWTH ; STATE ; RIVER ; COMMUNITY ; IMPACT ; PERIOD ; LEVEL ; MODEL ; DUST |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS记录号 | WOS:001313642200001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/207965]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 通讯作者 | Luo, Yi |
| 作者单位 | 1.Minist Ecol & Environm, Ctr Satellite Applicat Ecol & Environm, Beijing, Peoples R China 2.China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100038, Peoples R China 3.Tianjin Res Inst Water Transport Engn, Natl Engn Lab Port Hydraul Construct Technol, Tianjin 300456, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Duan, Zihao,Wang, Xiaolei,Sun, Lin,et al. An insight into effect of soil salinity on vegetation dynamics in the exposed seafloor of the Aral Sea[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,951:175615. |
| APA | Duan, Zihao,Wang, Xiaolei,Sun, Lin,Zhou, Meilin,&Luo, Yi.(2024).An insight into effect of soil salinity on vegetation dynamics in the exposed seafloor of the Aral Sea.SCIENCE OF THE TOTAL ENVIRONMENT,951,175615. |
| MLA | Duan, Zihao,et al."An insight into effect of soil salinity on vegetation dynamics in the exposed seafloor of the Aral Sea".SCIENCE OF THE TOTAL ENVIRONMENT 951(2024):175615. |
入库方式： OAI收割
来源：地理科学与资源研究所
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