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| DOI | 10.1016/j.scitotenv.2024.170252 |
| Global warming alters Himalayan alpine shrub growth dynamics and climate sensitivity | |
| 发表日期 | 2024 |
| ISSN | 0048-9697 |
| EISSN | 1879-1026 |
| 起始页码 | 916 |
| 卷号 | 916 |
| 英文摘要 | Global climate change is having significant effects on plant growth patterns and mountain plants can be particularly vulnerable to accelerated warming. Rising temperatures are releasing plants from cold limitation, such as at high elevations and latitudes, but can also induce drought limitation, as documented for trees from lower elevations and latitudes. Here we test these predictions using a unique natural experiment with Himalayan alpine shrub Rhododendron anthopogon and its growth responses to changing climate over a large portion of its latitudinal and elevational ranges, including steep precipitation and temperature gradients. We determined growth dynamics during the last three decades, representing period of accelerated warming, using annual radial growth increments for nine populations growing on both wet and warm southern localities and drier and cold northern localities in the Himalayas along elevation gradients encompassing the lower and upper species range limits. A significant growth increase over past decades was observed after controlling for confounding effect of shrub age and microsites. However, the magnitude of increase varied among populations. Particularly, populations situated in the lower elevation of the northernmost (cold and dry) locality exhibited most substantial growth enhancement. The relationship between growth variability and climate varied among populations, with the populations from the coldest location displaying the strongest responsiveness to increasing minimum temperatures during July. Minimum temperatures of April and August were the most important factor limiting the growth across most populations. Potential warming-induced drought limitation had no significant impact on growth variation in any part of the species geographic range. Overall, our findings indicate that plant growth is continuously increasing in recent decades and growth-climate relationships are not consistent across populations, with populations from the coldest and wettest localities showing stronger responses. The observed patterns suggest that dwarf-shrubs benefit from ongoing warming, leading to increased shrubification of high elevation alpine ecosystems. |
| 英文关键词 | Growth sensitivity; Climate Change; Dwarf shrub; Alpine ecosystems; Annual growth rings |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| WOS记录号 | WOS:001171803100001 |
| 来源期刊 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/291135 |
| 作者单位 | Czech Academy of Sciences; Institute of Botany of the Czech Academy of Sciences; Czech University of Life Sciences Prague; University of South Bohemia Ceske Budejovice; Charles University Prague |
| 推荐引用方式 GB/T 7714 | . Global warming alters Himalayan alpine shrub growth dynamics and climate sensitivity[J],2024,916. |
| APA | (2024).Global warming alters Himalayan alpine shrub growth dynamics and climate sensitivity.SCIENCE OF THE TOTAL ENVIRONMENT,916. |
| MLA | "Global warming alters Himalayan alpine shrub growth dynamics and climate sensitivity".SCIENCE OF THE TOTAL ENVIRONMENT 916(2024). |
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