Hydro-environmental shifts in Laolike peatland of Northeast China: Evidence from grain size distributions and end-member modeling analysis
文献类型：期刊论文
| 作者 | Li, Jing1,2,3; Dong, Yanmin1,3; Li, Hongkai1,3; Xu, Zhiwei1,3; Wang, Shengzhong1,3 |
| 刊名 | CATENA
 |
| 出版日期 | 2026-04-01 |
| 卷号 | 265页码:109845 |
| 关键词 | End-member modeling analysis Grain size distributions Peatland Hydrological evolution Holocene |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2026.109845 |
| 产权排序 | 3 |
| 文献子类 | Article |
| 英文摘要 | Peat serves as a critical geological archive in terrestrial ecosystems because of its ability to preserve high-resolution climatic and environmental records throughout its development. The hydrological conditions of peatlands are highly sensitive to climate variability and are commonly employed as key indicators for paleoclimate reconstruction. However, hydrological conditions within peatlands can exhibit notable spatial heterogeneity, influenced by local environmental factors such as paleotopography and autogenic self-organizing processes, which have not been sufficiently addressed. In this study, two peat cores (LLK17C and LLK-D-2019) from the Laolike peatland in the Changbai Mountains were analyzed using grain size distributions (GSDs) and end-member modeling analysis. Supported by a robust chronological framework and paleotopographic reconstruction, GSDs were examined under contrasting paleotopographic settings to evaluate hydrological dynamics and their driving mechanisms. The results demonstrated that hydrological evolution within the peatland exhibited evident spatial heterogeneity. The LLK17C core contained fine-grained sediments in which aeolian and aquatic components could not be effectively separated, whereas the LLK-D-2019 core yielded four distinct end members. On a millennial scale, climate acted as the primary control on hydrological evolution in the Laolike peatland between 11 and 4.2 kyr BP. After 4.2 kyr BP, the LLK-D-2019 core, located at the lowest topographic position, transitioned into a stable peat accumulation phase as water levels declined, as evidenced by abrupt shifts in GSDs, total organic carbon, and C/N ratios. In addition, local paleotopography and autogenic self-organization further modulated the internal hydrological conditions and their evolutionary trajectories. These findings highlight the importance of spatial heterogeneity in peatland hydrological evolution and indicate that paleohydrological reconstructions based on a single core may suffer from limited representativeness. This study contributes to improving our understanding of internal hydrological variability within peatlands and their longterm developmental dynamics. |
| URL标识 | 查看原文 |
| WOS关键词 | HOLOCENE CLIMATE-CHANGE ; ASIAN WINTER MONSOON ; CARBON ACCUMULATION ; BAYESIAN-ANALYSIS ; HIGH-RESOLUTION ; RECORDS ; VEGETATION ; LOESS ; SEDIMENTS ; DYNAMICS |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001677441400001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/220958]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 通讯作者 | Dong, Yanmin |
| 作者单位 | 1.Northeast Normal Univ, Inst Peat & Mire Res, Key Lab Wetland Ecol & Vegetat Restorat, Minist Ecol & Environm, Changchun 130024, Peoples R China; 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing, Peoples R China 3.Northeast Normal Univ, Sch Geog Sci, Key Lab Geog Proc & Ecol Secur Changbai Mt, Minist Educ, Changchun 130024, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Li, Jing,Dong, Yanmin,Li, Hongkai,et al. Hydro-environmental shifts in Laolike peatland of Northeast China: Evidence from grain size distributions and end-member modeling analysis[J]. CATENA,2026,265:109845. |
| APA | Li, Jing,Dong, Yanmin,Li, Hongkai,Xu, Zhiwei,&Wang, Shengzhong.(2026).Hydro-environmental shifts in Laolike peatland of Northeast China: Evidence from grain size distributions and end-member modeling analysis.CATENA,265,109845. |
| MLA | Li, Jing,et al."Hydro-environmental shifts in Laolike peatland of Northeast China: Evidence from grain size distributions and end-member modeling analysis".CATENA 265(2026):109845. |
入库方式： OAI收割
来源：地理科学与资源研究所
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