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| DOI | 10.1029/2023JG007583 |
| Hydrology Controls Dissolved Organic Carbon and Nitrogen Export and Post-Storm Recovery in Two Arctic Headwaters | |
| 发表日期 | 2024 |
| ISSN | 2169-8953 |
| EISSN | 2169-8961 |
| 起始页码 | 129 |
| 结束页码 | 2 |
| 卷号 | 129期号:2 |
| 英文摘要 | Climate change is rapidly altering hydrological processes and consequently the structure and functioning of Arctic ecosystems. Predicting how these alterations will shape biogeochemical responses in rivers remains a major challenge. We measured [C]arbon and [N]itrogen concentrations continuously from two Arctic watersheds capturing a wide range of flow conditions to assess understudied event-scale C and N concentration-discharge (C-Q) behavior and post-event recovery of stoichiometric conditions. The watersheds represent low-gradient, tundra landscapes typical of the eastern Brooks Range on the North Slope of Alaska and are part of the Arctic Long-Term Ecological Research sites: the Kuparuk River and Oksrukuyik Creek. In both watersheds, we deployed high-frequency optical sensors to measure dissolved organic carbon (DOC), nitrate (NO3-), and total dissolved nitrogen (TDN) for five consecutive thaw seasons (2017-2021). Our analyses revealed a lag in DOC:NO3- stoichiometric recovery after a hydrologic perturbation: while DOC was consistently elevated after high flows, NO3- diluted during rainfall events and consequently, recovery in post-event concentration was delayed. Conversely, the co-enrichment of TDN at high flows, even in watersheds with relatively high N-demand, represents a potential leak of hydrologically available organic N to downstream ecosystems. Our use of high-frequency, long-term optical sensors provides an improved method to estimate carbon and nutrient budgets and stoichiometric recovery behavior across event and seasonal timescales, enabling new insights and conceptualizations of a changing Arctic, such as assessing ecosystem disturbance and recovery across multiple timescales. |
| 英文关键词 | concentration-discharge; recession; storm event; Arctic hydrochemistry |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary |
| WOS记录号 | WOS:001158346800001 |
| 来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/300205 |
| 作者单位 | University of Alabama System; University of Alabama Tuscaloosa; Michigan State University; Brigham Young University; University of Vermont; Lanzhou University; United States Department of the Interior |
| 推荐引用方式 GB/T 7714 | . Hydrology Controls Dissolved Organic Carbon and Nitrogen Export and Post-Storm Recovery in Two Arctic Headwaters[J],2024,129(2). |
| APA | (2024).Hydrology Controls Dissolved Organic Carbon and Nitrogen Export and Post-Storm Recovery in Two Arctic Headwaters.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,129(2). |
| MLA | "Hydrology Controls Dissolved Organic Carbon and Nitrogen Export and Post-Storm Recovery in Two Arctic Headwaters".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 129.2(2024). |
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