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Chinese Journal of Applied Ecology ›› 2023, Vol. 34 ›› Issue (10): 2835-2844.doi: 10.13287/j.1001-9332.202310.015

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Effect of environmental factors on mineral soil respiration: A review

LIU Yuanhao1,2,3, DU Xulong1,2,3, HUANG Jinxue2*, XIONG Decheng1,2,3   

  1. 1Cultivation Base of State Key Laboratory for Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350117, China;
    2School of Geographical Sciences, Fujian Normal University, Fuzhou 350117, China;
    3Fujian Sanming Forest Ecosystem National Observation and Research Station, Sanming 365002, Fujian, China
  • Received:2023-05-09 Accepted:2023-08-21 Online:2023-10-15 Published:2024-04-15

Abstract: Mineral soil respiration, a major component of CO2 emissions from soil to atmosphere, plays a critical role in driving terrestrial ecosystem carbon cycling and is highly sensitive to environmental changes, including soil temperature, soil moisture, and substrate availability. The changes of environmental factors can affect mineral soil respiration and its temperature sensitivity thereby alters global carbon balance. We reviewed studies on the effects of environmental factors on mineral soil respiration and its temperature sensitivity. The effect of environmental factors on mineral soil respiration and its temperature sensitivity significantly differed among ecosystems. Environmental factors directly and indirectly affect mineral soil respiration and its temperature sensitivity by altering soil microbial biomass and community structure, extracellular enzyme activity, and soil porosity. Based on the results of this review, we suggested: 1) combining multiple observation techniques and methods to study the effects of environmental factors on mineral soil respiration; 2) exploring the interactive effects of multiple environmental factors on mineral soil respiration; 3) carrying out experiments on mineral soil respiration at different temporal and spatial scales; 4) improving the prediction model of mineral soil respiration and its temperature sensitivity; 5) streng-thening the role of substrate supply of recent photosynthates in the regulation of mineral soil respiration and its temperature sensitivity.

Key words: environmental factor, mineral soil respiration, substrate availability, temperature sensitivity, macromolecular rate theory