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Response and resilience of farmland ecosystems to flash drought in China

文献类型： 外文期刊

作者： Dai, Yuanxin 1 ; Xu, Mengyuan 2 ; Dong, Jinlong 1 ; Yao, Ning 1 ; Li, Yi 1 ; Liu, Shibin 3 ; Javed, Tehseen 4 ; Zhuo, La 5 ; Yu, Qiang 5 ;

作者机构： 1.Northwest A&F Univ, Coll Water Resources & Architectural Engn, Key Lab Agr Water & Soil Engn, Educ Minist, Yangling 712100, Shaanxi, Peoples R China

2.Shanghai Acad Agr Sci, Inst Agr Sci & Technol Informat, Shanghai 201403, Peoples R China

3.Chengdu Univ Technol, Coll Ecol & Environm, 1 Dongsanlu,Erxianqiao, Chengdu 610059, Sichuan, Peoples R China

4.Kohat Univ Sci & Technol, Dept Environm Sci, Kohat 26000, Pakistan

5.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China

关键词： Flash droughts; Heat wave flash drought; Precipitation deficit flash drought; Farmland ecosystems; Net primary productivity; Drought resilience

期刊名称：ECOLOGICAL INDICATORS （ 影响因子：7.4； 五年影响因子：7.2 ）

ISSN： 1470-160X

年卷期： 2025 年 176 卷

页码：

收录情况： SCI

摘要： Flash droughts negatively impact agricultural ecosystems and threaten food security due to their rapid development and unpredictability. This study utilized reanalyzed data from 2000 to 2018 and employed a comprehensive index method to identify two flash droughts: heat wave flash droughts (HWFD) and precipitation deficit flash droughts (PDFD). We analyzed the spatiotemporal evolution of these droughts across China's farmland ecosystems and investigated the response patterns of these ecosystems to both types of flash droughts using response frequency and response time metrics. Our findings indicate that between 2000 and 2018, flash droughts were most frequent in June, with the highest frequency and most extended duration occurring in summer and the lowest in autumn. Spatially, HWFD frequency was highest in the Loess Plateau, with durations of 4.4 and 5.0 octads, while PDFD was most frequent in the Gansu-Xinjiang (GX) and Huang-Huai-Hai (HHH) regions. Over time, there was a decrease in the frequency and duration of flash droughts. The study revealed that Net Primary Productivity (NPP) generally exhibited a low response frequency to flash droughts, with PDFD showing a higher response frequency and a shorter response time than HWFD. Irrigated farmland showed higher NPP response frequencies, particularly in the HHH region, whereas rainfed farmland demonstrated stronger resilience to flash droughts. This research provides theoretical support for developing flash drought early warning systems and drought mitigation policies, significantly contributing to food security in China's farmland ecosystems.

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