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Cui Y, Hu J, Peng S, Delgado-Baquerizo M, Moorhead DL, Sinsabaugh RL, Xu X, Geyer KM, Fang L, Smith P, Peñuelas J, Kuzyakov Y, Chen J. Limiting Resources Define the Global Pattern of Soil Microbial Carbon Use Efficiency. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2308176. [PMID: 39024521 DOI: 10.1002/advs.202308176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 06/30/2024] [Indexed: 07/20/2024]
Abstract
Microbial carbon (C) use efficiency (CUE) delineates the proportion of organic C used by microorganisms for anabolism and ultimately influences the amount of C sequestered in soils. However, the key factors controlling CUE remain enigmatic, leading to considerable uncertainty in understanding soil C retention and predicting its responses to global change factors. Here, we investigate the global patterns of CUE estimate by stoichiometric modeling in surface soils of natural ecosystems, and examine its associations with temperature, precipitation, plant-derived C and soil nutrient availability. We found that CUE is determined by the most limiting resource among these four basic environmental resources within specific climate zones (i.e., tropical, temperate, arid, and cold zones). Higher CUE is common in arid and cold zones and corresponds to limitations in temperature, water, and plant-derived C input, while lower CUE is observed in tropical and temperate zones with widespread limitation of nutrients (e.g., nitrogen or phosphorus) in soil. The contrasting resource limitations among climate zones led to an apparent increase in CUE with increasing latitude. The resource-specific dependence of CUE implies that soils in high latitudes with arid and cold environments may retain less organic C in the future, as warming and increased precipitation can reduce CUE. In contrast, oligotrophic soils in low latitudes may increase organic C retention, as CUE could be increased with concurrent anthropogenic nutrient inputs. The findings underscore the importance of resource limitations for CUE and suggest asymmetric responses of organic C retention in soils across latitudes to global change factors.
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Affiliation(s)
- Yongxing Cui
- Institute of Biology, Freie Universität Berlin, 14195, Berlin, Germany
- Department of Agroecology, Aarhus University, Tjele, 8830, Denmark
- Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China
| | - Junxi Hu
- College of Forestry, Sichuan Agricultural University, Chengdu, 611130, China
| | - Shushi Peng
- Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China
| | - Manuel Delgado-Baquerizo
- Laboratorio de Biodiversidad y Funcionamiento Ecosistémico. Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS), CSIC, Av. Reina Mercedes 10, Sevilla, E-41012, Spain
| | - Daryl L Moorhead
- Department of Environmental Sciences, University of Toledo, Toledo, OH, 43606, USA
| | - Robert L Sinsabaugh
- Department of Biology, University of New Mexico, Albuquerque, NM, 87131, USA
| | - Xiaofeng Xu
- Biology Department, San Diego State University, San Diego, CA, 92182, USA
| | - Kevin M Geyer
- Department of Biology, Young Harris College, Young Harris, GA, 30582, USA
| | - Linchuan Fang
- School of Resource and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, China
| | - Pete Smith
- Institute of Biological and Environmental Sciences, University of Aberdeen, 23 St. Machar Drive, Aberdeen, AB24 3UU, UK
| | - Josep Peñuelas
- CSIC, Global Ecology Unit CREAF-CSIC-UAB, Bellaterra, Barcelona, Catalonia, 08913, Spain
- CREAF, 08913 Cerdanyola del Vallès, Barcelona, Catalonia, 08193, Spain
| | - Yakov Kuzyakov
- Department of Soil Science of Temperate Ecosystems, Department of Agricultural Soil Science, University of Goettingen, 37077, Göttingen, Germany
- Peoples Friendship University of Russia (RUDN University), Moscow, 117198, Russia
| | - Ji Chen
- Department of Agroecology, Aarhus University, Tjele, 8830, Denmark
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China
- Institute of Global Environmental Change, Department of Earth and Environmental Science, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710049, China
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Guo Z, Liu CA, Hua K, Wang D, Wu P, Wan S, He C, Zhan L, Wu J. Changing soil available substrate primarily caused by fertilization management contributed more to soil respiration temperature sensitivity than microbial community thermal adaptation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169059. [PMID: 38061650 DOI: 10.1016/j.scitotenv.2023.169059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/28/2023] [Accepted: 11/30/2023] [Indexed: 01/18/2024]
Abstract
Substrate depletion and microbial community thermal adaptation are major mechanisms that regulate the temperature sensitivity (Q10) of soil microbial respiration. Traditionally, the Q10 of soil microbial respiration is measured using laboratory incubation, which has limits in the continuous input of available substrates and the time scale for microbial community thermal adaptation. How the available substrate and the soil microbial community regulate the Q10 of soil microbial respiration under natural warming conditions remains unclear. To fill this gap in knowledge, a long-term field experiment was conducted consisting of two years of soil respiration observations combined with a soil available substrate and microbial community thermal adaptation analysis under seasonal warming conditions. The Q10 of soil respiration was calculated using the square root method, and it was more affected by the available substrate than by microbial community thermal adaptation. Fertilization management has a stronger effect on soil available substrate than temperature. As the temperature increased, NH4-N proved itself to be important for the bacterial community in the process of Q10 regulation, while dissolved organic carbon and nitrogen were key factors for the fungal community. Based on the niche breadth of microbial community composition, the changing Q10 of the soil respiration was not only closely associated with the specialist community, but also the generalist and neutralist communities. Furthermore, bacterial community thermal adaptation primarily occurred through shifts in the abundances of specialists and neutralists, while changes in species richness and species replacement occurred for the fungal generalists and neutralists. This work indicates that changing available nitrogen and DOC primarily caused by fertilization management contributed more in regulating the Q10 of soil microbial respiration than microbial community thermal adaptation, and there are different mechanisms for bacterial and fungal community thermal adaptation under warming.
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Affiliation(s)
- Zhibin Guo
- Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei, Anhui 230031, China; Key Laboratory of Nutrient Cycling and Resources Environment of AnHui Province, Hefei, Anhui 230031, China
| | - Chang-An Liu
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun town, Mengla County, Yunnan Province 666303, China.
| | - Keke Hua
- Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei, Anhui 230031, China; Key Laboratory of Nutrient Cycling and Resources Environment of AnHui Province, Hefei, Anhui 230031, China
| | - Daozhong Wang
- Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei, Anhui 230031, China; Key Laboratory of Nutrient Cycling and Resources Environment of AnHui Province, Hefei, Anhui 230031, China.
| | - Pingping Wu
- Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei, Anhui 230031, China; Key Laboratory of Nutrient Cycling and Resources Environment of AnHui Province, Hefei, Anhui 230031, China
| | - Shuixia Wan
- Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei, Anhui 230031, China; Key Laboratory of Nutrient Cycling and Resources Environment of AnHui Province, Hefei, Anhui 230031, China
| | - Chuanlong He
- Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei, Anhui 230031, China; Key Laboratory of Nutrient Cycling and Resources Environment of AnHui Province, Hefei, Anhui 230031, China
| | - Linchuan Zhan
- Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei, Anhui 230031, China; Key Laboratory of Nutrient Cycling and Resources Environment of AnHui Province, Hefei, Anhui 230031, China
| | - Ji Wu
- Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei, Anhui 230031, China; Key Laboratory of Nutrient Cycling and Resources Environment of AnHui Province, Hefei, Anhui 230031, China.
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