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Journal of Desert Research ›› 2024, Vol. 44 ›› Issue (2): 207-219.DOI: 10.7522/j.issn.1000-694X.2023.00103

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Response of ground arthropod assemblages to precipitation and temperature changes in the gobi desert

Jialong Ren1(), Jiliang Liu2, Yongzhen Wang2, Jing Fang2, Yilin Feng3, Anling Gao4, Yuanxia Song4, Weidong Xin1()   

  1. 1.College of Geographic Sciences,Shanxi Normal University,Taiyuan 030031,China
    2.Linze Inland River Basin Research Station,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    3.School of Ecology and Environment,Ningxia University,Yinchuan 750021,China
    4.Inner Mongolia Ejina Populus Euphratica National Nature Reserve Management Bureau,Ejina 735400,Inner Mongolia,China
  • Received:2023-08-22 Revised:2023-11-15 Online:2024-03-20 Published:2024-03-19
  • Contact: Weidong Xin

Abstract:

Ground arthropods are the main group in the food web of gobi desert ecosystem,the changes of resources caused by precipitation fluctuation will affect the aggregation of ground arthropods, thus affecting the structure and function of desert ecosystem.In this article, we conducted a series of microclimate observations using the trap method at a long-term observation site of the desert ecosystem in the Linze Inland River Basin from January to December 2018 to December 2020, as well as the spatial distribution patterns of ground arthropods in the gobi desert under the influence of annual and month of precipitation and temperature changes.The results indicate that: (1) From 2018 to 2020, a total of 24 834 individuals and 45 families of ground arthropods were caught. The dominant families consisted of Tenebrionidae, Curculionidae, Chrysomelidae, Gnaphosidae, Geotrupidae and Formicidae. (2) The results of Moran's I index analysis showed that the number of ground arthropods was positively correlated at the spatial scale of 16 m and negatively correlated at the spatial scale of 56 m to 96 m, the semi-variance function and ordinary Kriger interpolation indicated that the ground arthropod families formed clusters and showed strong spatial heterogeneity at different time scales. (3) The spatial differentiation of Curculionidae, Geotrupidae, Gnaphosidae and Formicidae was mainly controlled by structural factors, while that of Tenebrionidae and Chrysomelidae was controlled by both structural and random factor. (4) The increase of precipitation had a positive correlation to the spatial community aggregation of the Tenebrionidae, Curculionidae, Chrysomelidae, and Geotrupidae, and a negative correlation to the community aggregation of the Gnaphosidae and Formicidae,there was a positive correlation between temperature and spatial aggregation and expansion of ground arthropods.In a word, the change of precipitation changed the response pattern and dependence degree of ground arthropods to the micro-habitat constructed by shrubs and ant nests, and then affected the spatial aggregation of ground arthropods in different years.

Key words: gobi desert, precipitation changes, ground arthropod assemblages, community dynamics, spatial pattern

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