Short-term responses of epigeic soil arthropod communities to seasonal asymmetric warming in an alpine meadow

doi:10.13287/j.1001-9332.202412.031

Abstract

Abstract: The impact of climate warming on ecosystem structure and function is one of the hotspots in global change research. Soil fauna play an important role in maintaining ecosystem stability. However, the response of the epigeic soil arthropod communities to seasonal asymmetric warming is still unclear. We set up a field experiment with using open-top chambers in an alpine meadow on the Qinghai-Tibet Plateau. There were four treatments, including control, growing season warming, non-growing season warming and year-round warming. We investigated soil arthropod communities using the motor-sucking method in October 2022 and May 2023. We collected a total of 6654 individuals of epigeic soil arthropod, belonging to 4 classes, 21 orders, 96 families and 144 taxa. The results showed that warming treatment did not affect community composition of soil arthropod, and significantly altered the dominant taxa as well as the trophic composition. The growing season warming significantly reduced the diversity index of the epigeic soil arthropod communities, but had no significant effect on density and taxonomic richness. It also significantly reduced the taxonomic richness of Collembola community (mainly fungal-feeding Collembola). The density of mite community was increased by 128.2%, while predatory mites were increased by 127.8%. How-ever, it decreased the diversity index of the mite community. The non-growing season warming did not affect the density and diversity of the arthropod community. Warming indirectly affected the density and diversity of the Collembola and mite communities by altering plant community, soil nutrients, and soil water content. Our results highlight that the diversity of the epigeic soil arthropod community is highly sensitive to climate warming. Changes in the epigeic soil arthropod communities caused by climate warming, especially growing season warming, may lead to changes in the structure and function of soil food webs in alpine meadows.

Key words: Collembola, mites, climate warming, growing season, Qinghai-Tibetan Plateau, alpine meadow

ZHANG Shu, WU Pengfei, MA Jinhao, WANG Yuying, REN Xiao, WEI Xue. Short-term responses of epigeic soil arthropod communities to seasonal asymmetric warming in an alpine meadow[J]. Chinese Journal of Applied Ecology, 2024, 35(12): 3477-3487.

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