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Journal of Desert Research ›› 2026, Vol. 46 ›› Issue (4): 365-376.DOI: 10.7522/j.issn.1000-694X.2025.00274

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Effects of simulated reduced precipitation on ground arthropod diversity in gobi desert ecosystems

Qihan Yan1,2(), Jiliang Liu2, Yongzhen Wang2, Yilin Feng2, Chang Qin1,2, Jialong Ren1,2, Weidong Xin1(), Yayong Luo2()   

  1. 1.College of Geographical Sciences,Shanxi Normal University,Taiyuan 030031,China
    2.Linze Inland River Basin Research Station / Key Laboratory of State Forestry and Grassland Administration on “Mountain-River-Forest-Farmland-Lake-Grassland-Desert System Governance”,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
  • Received:2025-07-20 Revised:2025-10-30 Online:2026-07-20 Published:2026-08-27
  • Contact: Weidong Xin, Yayong Luo

Abstract:

In the gobi desert, precipitation variability has a profound impact on the growth and reproduction of plants, arthropods, and vertebrates, which in turn drives changes in desert biodiversity and its ecological functions. Leveraging long-term precipitation data from this region, we established a fixed-plot experimental platform centered on individual shrubs to simulate a 50% reduction in precipitation. This study examines how ground arthropod diversity responds to reduced precipitation and explores the seasonal patterns of these responses. The results showed that in the Reaumuria songarica plots, reduced precipitation had a minimal impact on the composition of ground arthropod communities in both summer and autumn. In contrast, in the Nitraria sphaerocarpa plots, reduced precipitation significantly altered the composition of ground arthropod communities in summer but had a lesser effect in autumn. In the N. sphaerocarpa plots, the reduced precipitation treatment significantly decreased the abundance of omnivorous arthropods in summer but increased the abundance of predatory and herbivorous arthropods. Additionally, the reduced precipitation treatment led to a significant decline in the abundance of large beetles in summer, while the abundance of small beetles increased significantly. Moreover, the study also found that the reduced precipitation treatment significantly increased the abundance of Cleonus verrucosus and Sternotrigon kraatzi during summer and the abundance of Blaps gobiensis during autumn in the R. songarica plots, while significantly decreasing the abundance of Lethrus potanini in autumn. In summary, reduced precipitation in the gobi desert results in decreased abundance of large omnivorous arthropods, particularly beetles, with the extent of this reduction varying by season and shrub species. These shifts can profoundly affect the structure and function of food webs.

Key words: gobi desert, simulated reduced precipitation, ground arthropods, diversity, functional traits

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