Abstract
Aims
Precipitation patterns in the tropics of southern China are predicted to change with an increase of the rainfall in the wet season (WW) and a delay of the wet season into autumn (DW). To explore how soil C cycles respond to a changing precipitation pattern, we established a precipitation manipulation experiment through water exclusion or addition.
Methods
We assessed soil physicochemical properties, microbial communities, glomalin-related soil protein (GRSP), and microbial residual carbon (MRC) to indicate whether there are differences in soil C cycling after altered precipitation patterns.
Results
Changes in precipitation patterns did not affect soil properties at 0-10 cm soil depth. However, the WW treatment significantly increased microbial biomass (by 52%) at 10-20 cm soil depth owing to its long-term promotion. At the same time, the increment of microorganisms significantly decreased the contribution of fungal MRC to SOC (by 32%), and there was an increasing trend in bacterial MRC and SOC.
Conclusions
Over a long time, the facilitation of microbes and the alteration of microbial contribution to SOC by intensified precipitation in the wet season will enhance the carbon sequestration capacity of tropical forest soils, which is of great importance in mitigating global warming.
Graphical abstract
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Data Availability
The datasets generated and analyzed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- AMF:
-
Arbuscular mycorrhizal fungi
- ANOVA:
-
One-way analysis of variance
- BP:
-
Brey phosphorous
- CT:
-
Control
- DW:
-
The delayed wet season treatment
- F/B:
-
The ratio of fungi to bacteria
- GalN:
-
Galactosamine
- GluN:
-
Glucosamine
- GRSP:
-
Glomalin-related soil protein
- MRC:
-
Microbial residual carbon
- MurN:
-
Muramic acid
- NH4 +-N:
-
Soil ammonium
- NO3 --N:
-
Soil nitrate
- PLFAs:
-
Phospholipid fatty acids
- PLS-PM:
-
Partial least squares path modeling
- SOC:
-
Soil organic carbon
- WW:
-
The wetter wet season treatment
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Acknowledgements
This study was funded by the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (GML2019ZD0408), the National Natural Science Foundation of China (31670621, 31870463, U2106209, 32011530164, 32171594), the Guangdong Basic and Applied Basic Research Foundation (2021B1515020011), the CAS Youth Innovation Promotion Association (2021347), the National Forestry and Grassland Administration Youth Talent Support Program (2020BJ003), the National Key R&D Program (2021YFC3100402), and the R & D program of Guangdong Provincial Department of Science and Technology (2018B030324003).
Funding
This study was supported by the National Natural Science Foundation of China (31870463, U2106209, 32011530164, 31670621, 32171594), the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (GML2019ZD0408), the Guangdong Basic and Applied Basic Research Foundation (2021B1515020011), the CAS Youth Innovation Promotion Association (2021347), the National Forestry and Grassland Administration Youth Talent Support Program (2020BJ003), the National Key R&D Program (2021YFC3100402), and the R & D program of Guangdong Provincial Department of Science and Technology (2018B030324003).
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Faming Wang designed the experiment. Jinge Zhou, Jingfan Zhang, Yingwen Li, and Yongxing Li performed the experiments. Jinge Zhou analyzed the data. Jinge Zhou, Hans Lambers and Faming Wang wrote this manuscript. All co-authors revised the manuscript.
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Zhou, J., Zhang, J., Lambers, H. et al. Intensified rainfall in the wet season alters the microbial contribution to soil carbon storage. Plant Soil 476, 337–351 (2022). https://doi.org/10.1007/s11104-022-05389-2
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DOI: https://doi.org/10.1007/s11104-022-05389-2