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| DOI | 10.1016/j.agrformet.2024.110036 |
| CO 2 enrichment accelerates alpine plant growth via increasing water-use efficiency | |
| 发表日期 | 2024 |
| ISSN | 0168-1923 |
| EISSN | 1873-2240 |
| 起始页码 | 352 |
| 卷号 | 352 |
| 英文摘要 | Phenological changes in global vegetation are often attributed to climate warming. However, climate warming and elevated atmospheric CO 2 concentration ( e CO 2 ) are two co-occurring global change factors, and how e CO 2 would affect vegetation phenology has received less attention. The partial pressure of atmospheric CO 2 on the Tibetan Plateau (TP) is lower than that in regions of lower altitudes. Consequently, the growth and phenology of alpine plants in this region could be more sensitive to e CO 2 , but this hypothesis is not yet supported by empirical evidence. Here we explored the effect of e CO 2 on plant phenology (including phenophases of green -up, budding, and flowering) through a 5 -year field manipulation experiment in a high -altitude (4600 m above sea level) alpine grassland on the TP. Our results showed that e CO 2 significantly advanced the spring phenology of an earlyflowering species ( Kobresia pygmaea ), while it had no impact on the phenology of two mid -flowering species ( Potentilla saundersiana and Potentilla cuneata ). Compared to other low -altitude regions, plant phenology on the TP underwent greater alterations under e CO 2 , which supports our hypothesis that the growth of high -altitude plants is more sensitive to e CO 2 . Furthermore, we found that e CO 2 significantly reduced the overlapping of flowering between contrasting plant species, mainly due to the phenological advancement of the K. pygmaea induced by e CO 2 . The observed advancement of the spring phenology in K. pygmaea under e CO 2 was associated with increasing ecosystem water -use efficiency (WUE), thereby advancing its subsequent phenological development, such as budding and flowering. Our findings provide experimental evidence that atmospheric CO 2 enrichment can accelerate plant growth processes in high -altitude regions, and suggest that large-scale model simulations should consider the effects of elevated atmospheric CO 2 concentration on plant growth and phenology. |
| 英文关键词 | Plant phenology; Alpine plant; CO 2 enrichment; Water -use efficiency; Tibetan plateau |
| 语种 | 英语 |
| WOS研究方向 | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
| WOS类目 | Agronomy ; Forestry ; Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:001236650700001 |
| 来源期刊 | AGRICULTURAL AND FOREST METEOROLOGY
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/304176 |
| 作者单位 | Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Beijing Forestry University; Henan University; Hebei University |
| 推荐引用方式 GB/T 7714 | . CO 2 enrichment accelerates alpine plant growth via increasing water-use efficiency[J],2024,352. |
| APA | (2024).CO 2 enrichment accelerates alpine plant growth via increasing water-use efficiency.AGRICULTURAL AND FOREST METEOROLOGY,352. |
| MLA | "CO 2 enrichment accelerates alpine plant growth via increasing water-use efficiency".AGRICULTURAL AND FOREST METEOROLOGY 352(2024). |
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