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| DOI | 10.1016/j.polar.2023.100984 |
| Biophysical effects of an old tundra fire in the Brooks Range Foothills of Northern Alaska, USA | |
| 发表日期 | 2024 |
| ISSN | 1873-9652 |
| EISSN | 1876-4428 |
| 起始页码 | 39 |
| 卷号 | 39 |
| 英文摘要 | Our understanding of tundra fire effects in Northern Alaska is limited because fires have been relatively rare. We sampled a 70+ year -old burn visible in a 1948 aerial photograph for vegetation composition and structure, soil attributes, terrain rugosity, and thermokarst pit density. Between 1948 and 2017 the burn initially became wetter as ice wedges melted but then drained and dried as the troughs became hydrologically connected. The reference tundra has become wetter over the last few decades and appears to be lagging through a similar sequence. The burn averaged 2.5 degrees C warmer than the reference tundra at 30 cm depth. Thinning of organic soil following fire appears to dramatically accelerate the background degradation of ground-ice features in response to climate change and promotes a plant community that is distinct in terms of taxa and structure, dominated by tall willows and other competitive, rather than cold-tolerant, species. The cover of sedges and mosses is low while that of willows and grass is high relative to the reference tundra. The changes in plant community composition and structure, increasing ground temperature, and thermokarst lead us to expect the observed biophysical changes to the tundra will persist centuries into the future. |
| 英文关键词 | Thermokarst; Yedoma; Tussock tundra; Permafrost; Eriophorum |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| WOS类目 | Ecology ; Geosciences, Multidisciplinary |
| WOS记录号 | WOS:001208230900001 |
| 来源期刊 | POLAR SCIENCE
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/287915 |
| 作者单位 | United States Department of the Interior; United States Geological Survey; University of Alaska System; University of Alaska Fairbanks; University of Alaska System; University of Alaska Fairbanks |
| 推荐引用方式 GB/T 7714 | . Biophysical effects of an old tundra fire in the Brooks Range Foothills of Northern Alaska, USA[J],2024,39. |
| APA | (2024).Biophysical effects of an old tundra fire in the Brooks Range Foothills of Northern Alaska, USA.POLAR SCIENCE,39. |
| MLA | "Biophysical effects of an old tundra fire in the Brooks Range Foothills of Northern Alaska, USA".POLAR SCIENCE 39(2024). |
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