Monitoring of Flash Drought on the Loess Plateau and Its Impact on Vegetation Ecosystems

Flash drought (FD) has attracted much attention due to its severe stress on vegetation ecosystems. Yet to date, the impacts of FD on vegetation ecosystems in different regions have not been fully evaluated and explored, especially for ecologically fragile areas. In this study, we identified the FD e...

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Bibliographic Details
Published in:Forests 2024-08, Vol.15 (8), p.1455
Main Authors: Jiang, Yanmin, Shi, Haijing, Wen, Zhongming, Yang, Xihua, Wu, Youfu, Li, Li, Ma, Yuxin, Dymond, John R., Guo, Minghang, Shui, Junfeng, Hu, Hong
Format: Article
Language:English
Subjects:
Agricultural land
Agricultural production
China
Chlorophyll
climate
Climate change
cropland
Drought
Droughts
Ecosystems
Environmental aspects
Fluorescent indicators
forests
Global warming
Grasslands
High temperature
Identification and classification
Measurement
Photosynthesis
Physiology
Plant communities
Precipitation
Soil erosion
Soil moisture
soil water
Vegetation
Water conservation
Water shortages
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Summary:Flash drought (FD) has attracted much attention due to its severe stress on vegetation ecosystems. Yet to date, the impacts of FD on vegetation ecosystems in different regions have not been fully evaluated and explored, especially for ecologically fragile areas. In this study, we identified the FD events in the Loess Plateau from 2000 to 2023 based on the attenuation rate in soil moisture percentile over time. The evolution process of FD, the driving roles of meteorological conditions and the responses of different vegetation types to FD were explored by vegetation indicators such as solar-induced chlorophyll fluorescence (SIF), SIFyield, SIF-RCI, etc. The results showed that FD events were predominantly concentrated in wetter areas with dense vegetation, with the highest frequency being 29. Meteorological factors contributed differently to the occurrence and development of FD. The responses of vegetation to FD were not only related to vegetation types (cropland was more sensitive to FD than forest and grassland) but were also significantly influenced by background climate. The SIFyield anomaly of vegetation was more sensitive than SIF anomaly and SIF-RCI. The results advance our understanding of the formation mechanisms of FD and facilitate the exploration of vegetative photosynthetic responses to FD.
ISSN:1999-4907
1999-4907
DOI:10.3390/f15081455