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Low substrate concentration intensifies the earthworm-driven increase in temperature sensitivity of SOM decomposition

文献类型：期刊论文

作者Zhao, Shenliang1,2; Chai, Hua1,2; Li, Mingxu3; Jiao, Chaolian1,2; Liu, Cheng1,2; Xu, Li3; Li, Jie1,2; He, Nianpeng1,2
刊名BIOLOGY AND FERTILITY OF SOILS
出版日期2026-02-10
卷号N/A
关键词Soil fauna Earthworm Soil organic matter decomposition Temperature sensitivity Substrate concentration Soil depth
ISSN号0178-2762
DOI10.1007/s00374-026-01990-0
产权排序3
文献子类Article ; Early Access
英文摘要Substrate concentration is a key determinant of temperature sensitivity (Q(10)) in soil organic matter (SOM) decomposition. Although the microbial processes underlying this relationship are well documented, the role of soil fauna, particularly earthworms, in shaping the temperature response of SOM decomposition remains largely unexplored. In this study, we examined how earthworms and their deposits (excreta and secretions) influence the SOM decomposition rate (R-s) and Q(10) across natural substrate concentration gradients. We combined stratified sampling across a 1-m soil profile (representing vertical variation in substrate concentration gradients) with laboratory incubations under simulated diurnal temperature fluctuations. Using a high-frequency (CO2 concentration captured at 1-s intervals) automated system, we quantified the effects of earthworms and their deposits on R-s and Q(10). The results showed that earthworm deposits alone moderately increased R-s by 22-56% and Q(10) by 4-14%, with stronger effects in surface soils characterized by high substrate concentrations. Earthworm continued presence substantially amplified these responses, increasing R-s by 194-277% and Q(10) by 26-63%, notably, the greatest increase in Q(10) occurred under low substrate concentrations. Earthworm activity strengthened the dependence of Q(10) on both substrate concentration and microbial activity; however, earthworm endogenous Q(10) remained stable across substrate and temperature conditions. These findings demonstrate that earthworms are strong biotic regulators of the temperature sensitivity of SOM decomposition, particularly in substrate-limited soils.
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WOS关键词SOIL ORGANIC-MATTER ; MICROBIAL BIOMASS ; CARBON DECOMPOSITION ; CLIMATE ; SEQUESTRATION ; AVAILABILITY ; RESPIRATION ; PERSISTENCE ; EXTRACTION ; NITROGEN
WOS研究方向Agriculture
语种英语
WOS记录号WOS:001686789100001
出版者SPRINGER
源URL[http://ir.igsnrr.ac.cn/handle/311030/220900]  
专题生态系统网络观测与模拟院重点实验室_外文论文
通讯作者Li, Jie
作者单位1.Northeast Forestry Univ, Sch Ecol, Key Lab Sustainable Forest Ecosyst Management, Minist Educ, Harbin 150040, Peoples R China;
2.Northeast Forestry Univ, Inst Carbon Neutral, Sch Ecol, Harbin 150040, Peoples R China;
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Zhao, Shenliang,Chai, Hua,Li, Mingxu,et al. Low substrate concentration intensifies the earthworm-driven increase in temperature sensitivity of SOM decomposition[J]. BIOLOGY AND FERTILITY OF SOILS,2026,N/A.
APA Zhao, Shenliang.,Chai, Hua.,Li, Mingxu.,Jiao, Chaolian.,Liu, Cheng.,...&He, Nianpeng.(2026).Low substrate concentration intensifies the earthworm-driven increase in temperature sensitivity of SOM decomposition.BIOLOGY AND FERTILITY OF SOILS,N/A.
MLA Zhao, Shenliang,et al."Low substrate concentration intensifies the earthworm-driven increase in temperature sensitivity of SOM decomposition".BIOLOGY AND FERTILITY OF SOILS N/A(2026).

入库方式： OAI收割

来源：地理科学与资源研究所

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