globalchange  > 气候变化与战略
DOI: 10.1016/j.scitotenv.2019.134563
Microbe-mediated attenuation of soil respiration in response to soil warming in a temperate oak forest
Author: Wang Y.; Liu S.; Wang J.; Chang S.X.; Luan J.; Liu Y.; Lu H.; Liu X.
Source Publication: Science of the Total Environment
ISSN: 489697
Publishing Year: 2020
Volume: 711
Language: 英语
Keyword: Carbon cycling ; Enzyme activities ; Microbial biomass ; Nitrogen availability ; Soil respiration ; Soil warming
Scopus Keyword: Biomass ; Enzyme activity ; Enzymes ; Reforestation ; Soil moisture ; Carbon cycling ; Microbial biomass ; Nitrogen availability ; Soil respiration ; Soil warming ; Bacteria ; biomass ; carbon cycle ; climate change ; enzyme activity ; nitrogen ; soil biota ; soil respiration ; soil water ; temperate forest ; warming ; Article ; carbon cycling ; China ; climate warming ; controlled study ; enzyme activity ; forest ; microbial biomass ; nitrogen availability ; nonhuman ; oak ; priority journal ; soil microflora ; soil respiration ; soil temperature ; soil warming ; soil water content ; temperature sensitivity ; Quercus aliena
English Abstract: Soil respiration (Rs) in response to climate warming received a wide concern due to its important role in terrestrial ecosystem carbon (C) cycling, but the warming-induced effects of soil microbes on soil respiration are still less understood, especially over time. Our study aims to understand the long-term warming induced effects of soil microbes on Rs. A field soil warming experiment using a completely randomized design was conducted in a naturally regenerated oak forest (Quercus aliena) in central China. Soil warming was executed by infrared heater throughout the period from 2011 to 2015. Our results showed that soil temperature was a main factor in regulating Rs in a temperate oak forest throughout the experiment, while soil water content determined Rs only when a naturally dry year occurred. The positive effect of soil warming on Rs that was observed (i.e., 37.5 to 42.0% in the first two years) gradually diminished in the following three years (i.e., 0.9 to 15.4%). Significant positive warming effects on the temperature sensitivity of Rs (Q10) only occurred in the second year. Continuous soil warming caused the decline in nitrogen (N) availability, with a significant increase in microbial biomass-specific enzyme activities for N-acquisition. The attenuation of microbial biomass increment and the decreased ratio of enzymatic C:N acquisition contributed to the diminished warming effect on Rs over time. Our study suggests that microbe-mediated attenuation of Rs, accompanied by the concomitant decline in soil N availability in response to warming, should be taken into consideration in global C cycle modeling. © 2019 Elsevier B.V.
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Document Type: 期刊论文
Appears in Collections:气候变化与战略

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Affiliation: Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry and Grassland Administration, Institute for Resources and Environment, International Centre for Bamboo and Rattan, Beijing, 100102, China; Key Laboratory of Forest Ecology and Environment, State Forestry and Grassland Administration The Research, Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing, 100091, China; West Virginia University, Division of Forestry and Natural Resources, Morgantown, WV 26506, United States; Department of Renewable Resources, University of Alberta, Edmonton, AB T6G 2E35, Canada; International Joint Research Laboratory for Global Change Ecology, State Key Laboratory of Cotton Biology, College of Life Science, Henan University, Kaifeng, 475004, China; School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, 510275, China; Baotianman Natural Reserve Administration, Neixiang County, Henan, 474350, China

Recommended Citation:
Wang Y.,Liu S.,Wang J.,et al. Microbe-mediated attenuation of soil respiration in response to soil warming in a temperate oak forest[J]. Science of the Total Environment,2020-01-01,711
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