Satellite observations indicate slower recovery of woody components compared to upper-canopy and leaves in tropical rainforests after drought

IF 8.1 1区地球科学 Q1 ENVIRONMENTAL SCIENCES

Communications Earth & Environment Pub Date : 2024-11-20 DOI:10.1038/s43247-024-01892-9

Yujie Dou, Feng Tian, Jean-Pierre Wigneron, Xiaojun Li, Wenmin Zhang, Yaoliang Chen, Luwei Feng, Qi Xie, Rasmus Fensholt

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Abstract

The 2015–2016 El Niño-induced drought caused biomass loss in global tropical forests, yet the recovery duration of different vegetation components (woody components, upper canopies, and leaves) remains unknown. Here, we use satellite remote sensing data of vegetation optical depth and leaf area index, with varying sensitivity to different vegetation components, to examine vegetation recovery during the drought event. We find that the woody component had the slowest recovery compared to the upper canopy and leaves, and displayed greater spatial variability between continents. Key factors influencing woody recovery include drought severity, moisture-related climatic conditions (i.e., vapor pressure deficit, precipitation, and soil moisture), and seasonal variations in temperature and precipitation. Our study highlights the importance of different vegetation components for maintaining ecosystem balance under drought disturbances and indicates the need for further research to explore recovery mechanisms and the long-term impacts of drought on forest dynamics. Woody components of tropical forests have a slower recovery rate from severe drought compared to upper canopies and leaves, according to multiple remote sensing observations across the tropics during the El Niño-induced drought of 2015-2016

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卫星观测结果表明，热带雨林干旱后木质成分的恢复速度慢于树冠上部和树叶的恢复速度

2015-2016 年厄尔尼诺引发的干旱造成全球热带森林生物量损失，但不同植被成分（木质成分、上部树冠和叶片）的恢复持续时间仍然未知。在此，我们利用卫星遥感数据植被光学深度和叶面积指数（对不同植被成分的敏感度不同）来研究干旱事件期间的植被恢复情况。我们发现，与上层冠层和叶片相比，木本植被的恢复速度最慢，而且各大洲之间的空间差异更大。影响木质部恢复的主要因素包括干旱严重程度、与水分相关的气候条件（即蒸汽压力不足、降水和土壤湿度）以及温度和降水的季节性变化。我们的研究强调了不同植被成分在干旱干扰下维持生态系统平衡的重要性，并指出需要进一步研究干旱对森林动态的恢复机制和长期影响。在2015-2016年厄尔尼诺引发的干旱期间，根据对热带地区的多次遥感观测，热带森林的木质成分与上部树冠和树叶相比，从严重干旱中恢复的速度较慢

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来源期刊

Communications Earth & Environment Earth and Planetary Sciences-General Earth and Planetary Sciences

CiteScore

8.60

自引率

2.50%

发文量

269

审稿时长

26 weeks

期刊介绍： Communications Earth & Environment is an open access journal from Nature Portfolio publishing high-quality research, reviews and commentary in all areas of the Earth, environmental and planetary sciences. Research papers published by the journal represent significant advances that bring new insight to a specialized area in Earth science, planetary science or environmental science. Communications Earth & Environment has a 2-year impact factor of 7.9 (2022 Journal Citation Reports®). Articles published in the journal in 2022 were downloaded 1,412,858 times. Median time from submission to the first editorial decision is 8 days.