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| DOI | 10.1002/ecs2.4805 |
| Patterns, drivers, and implications of postfire delayed tree mortality in temperate conifer forests of the western United States | |
| 发表日期 | 2024 |
| ISSN | 2150-8925 |
| 起始页码 | 15 |
| 结束页码 | 4 |
| 卷号 | 15期号:4 |
| 英文摘要 | Conifer forest resilience may be threatened by increasing wildfire activity and compound disturbances in western North America. Fire refugia enhance forest resilience, yet may decline over time due to delayed mortality-a process that remains poorly understood at landscape and regional scales. To address this uncertainty, we used high-resolution satellite imagery (5-m pixel) to map and quantify delayed mortality of conifer tree cover between 1 and 5 years postfire, across 30 large wildfires that burned within three montane ecoregions in the western United States. We used statistical models to explore the influence of burn severity, topography, soils, and climate moisture deficit on delayed mortality. We estimate that delayed mortality reduced live conifer tree cover by 5%-25% at the fire perimeter scale and 12%-15% at the ecoregion scale. Remotely sensed burn severity (1-year postfire) was the strongest predictor of delayed mortality, indicating patch-level fire effects are a strong proxy for fire injury severity among surviving trees that eventually perish. Delayed mortality rates were further influenced by long-term average and short-term postfire climate moisture deficits, illustrating the impact of drought on fire-injured tree survival. Our work demonstrates that delayed mortality in conifer forests of the western United States can be remotely quantified at a fine grain and landscape scale, is a spatially extensive phenomenon, is driven by fire-climate-environment interactions, and has important ecological implications. |
| 英文关键词 | burn severity; delayed mortality; fire effects; fire refugia; forest resilience; remote sensing; temperate conifer forests; western United States |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Ecology |
| WOS记录号 | WOS:001200555000001 |
| 来源期刊 | ECOSPHERE
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/299994 |
| 作者单位 | Portland State University; Portland State University |
| 推荐引用方式 GB/T 7714 | . Patterns, drivers, and implications of postfire delayed tree mortality in temperate conifer forests of the western United States[J],2024,15(4). |
| APA | (2024).Patterns, drivers, and implications of postfire delayed tree mortality in temperate conifer forests of the western United States.ECOSPHERE,15(4). |
| MLA | "Patterns, drivers, and implications of postfire delayed tree mortality in temperate conifer forests of the western United States".ECOSPHERE 15.4(2024). |
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