Application of stable isotope techniques in soil food web research

doi:10.13287/j.1001-9332.202310.013

Abstract

Abstract: Stable isotope technique is important for understanding the structure and function of soil food web, which is considered as a belowground black box. We reviewed typical application cases of stable isotope techniques in the research of soil food webs, including to determine food sources and feeding preferences of soil fauna by using isotopes, and to analyze the trophic structure of soil food webs through isotope fractionation effects during the process of feeding and nutrient sequestration by soil fauna. Additionally, stable isotope techniques could reveal the role of soil biota at different trophic levels within soil food web in ecosystem matter and energy flow, which favored to carry out accurate and efficient research on the contribution of soil food webs to soil carbon and nitrogen cycling process and the corresponding influence mechanism. We further put forward the limitations of current stable isotope techniques and the future development directions.

Key words: stable isotope, soil food web, predatory relationship, trophic level, carbon and nitrogen cycles

WANG Xiao, LIANG Siwei, TIAN Yijia, LIU Xiaotong, LIANG Wenju, ZHANG Xiaoke. Application of stable isotope techniques in soil food web research[J]. Chinese Journal of Applied Ecology, 2023, 34(10): 2861-2870.

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