Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.16017 |
Tropical tall forests are more sensitive and vulnerable to drought than short forests | |
Liyang Liu; Xiuzhi Chen; Philippe Ciais; Wenping Yuan; Fabienne Maignan; Jin Wu; Shilong Piao; Ying-Ping Wang; Jean-Pierre Wigneron; Lei Fan; Pierre Gentine; Xueqin Yang; Fanxi Gong; Hui Liu; Chen Wang; Xuli Tang; Hui Yang; Qing Ye; Bin He; Jiali Shang; Yongxian Su | |
2021-12-09 | |
发表期刊 | Global Change Biology |
出版年 | 2021 |
英文摘要 | Our limited understanding of the impacts of drought on tropical forests significantly impedes our ability in accurately predicting the impacts of climate change on this biome. Here, we investigated the impact of drought on the dynamics of forest canopies with different heights using time-series records of remotely sensed Ku-band vegetation optical depth (Ku-VOD), a proxy of top-canopy foliar mass and water content, and separated the signal of Ku-VOD changes into drought-induced reductions and subsequent non-drought gains. Both drought-induced reductions and non-drought increases in Ku-VOD varied significantly with canopy height. Taller tropical forests experienced greater relative Ku-VOD reductions during drought and larger non-drought increases than shorter forests, but the net effect of drought was more negative in the taller forests. Meta-analysis of in situ hydraulic traits supports the hypothesis that taller tropical forests are more vulnerable to drought stress due to smaller xylem-transport safety margins. Additionally, Ku-VOD of taller forests showed larger reductions due to increased atmospheric dryness, as assessed by vapor pressure deficit, and showed larger gains in response to enhanced water supply than shorter forests. Including the height-dependent variation of hydraulic transport in ecosystem models will improve the simulated response of tropical forests to drought. |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/343012 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Liyang Liu,Xiuzhi Chen,Philippe Ciais,et al. Tropical tall forests are more sensitive and vulnerable to drought than short forests[J]. Global Change Biology,2021. |
APA | Liyang Liu.,Xiuzhi Chen.,Philippe Ciais.,Wenping Yuan.,Fabienne Maignan.,...&Yongxian Su.(2021).Tropical tall forests are more sensitive and vulnerable to drought than short forests.Global Change Biology. |
MLA | Liyang Liu,et al."Tropical tall forests are more sensitive and vulnerable to drought than short forests".Global Change Biology (2021). |
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