The productivity anomalies and economic losses of different grassland ecosystems caused by flash drought

Xiaoxu Liu, Xiaomin Liu, Yaotian Yang, Miao Yu and Hailong Tian

Agricultural Water Management, 2024, vol. 305, issue C

Abstract: Flash drought has attracted worldwide attention in recent years because of its destructive effects on ecosystems. However, the research on ecosystem loss caused by flash drought is insufficient. In this study, a basis for further understanding of the impact of flash drought on grassland was developed, and a method was established for quantitatively assessing productivity and economic losses in various types of grassland impacted by different levels of flash drought. The results showed that grassland productivity anomalies, productivity loss, and economic loss caused by flash drought vary with grassland type, flash drought type, and flash drought stage. During flash drought, the average NPP loss rate (NPPLR) is >60 %; and the minimum daily economic loss is >1200×106 yuan. In the early stage of mild drought, flash drought can cause the NPPLR to exceed 50 %, and the NPPLR increases significantly with increasing flash drought intensity. Flash drought-induced losses occur primarily in summer. The productivity anomalies, productivity loss and economic loss are greatest in meadow grassland, with the lowest values in desert grassland. Meadow grassland productivity suffers severe losses in almost all flash drought stages. The main stages causing flash drought-induced losses are mild drought in typical grassland and severe and extreme drought in desert grassland. The productivity and economic losses caused by strong evapotranspiration flash drought (SEFD) are greater than those caused by heat wave flash drought (HWFD), and SEFD is more likely to cause productivity loss. The flash drought-induced direct economic loss in grassland is higher than the indirect economic loss and the investment premium loss. In addition to agriculture and animal husbandry, flash drought has the greatest impact on the chemical products industry. The flash drought-induced losses of grassland ecosystems will continue to increase in the future.

Keywords: Flash drought; Grassland ecosystem; Productivity; Economy; Loss model (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:305:y:2024:i:c:s037837742400475x

DOI: 10.1016/j.agwat.2024.109139

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