Long-Term Daytime Warming Rather Than Nighttime Warming Alters Soil Microbial Composition in a Semi-Arid Grassland

Climate warming has profoundly influenced community structure and ecosystem functions in the terrestrial biosphere. However, how asymmetric rising temperatures between daytime and nighttime affect soil microbial communities that predominantly regulate soil carbon (C) release remains unclear. As part of a decade-long warming manipulation experiment in a semi-arid grassland, we aimed to examine the effects of short- and long-term asymmetrically diurnal warming on soil microbial composition. Neither daytime nor nighttime warming affected soil microbial composition in the short term, whereas long-term daytime warming instead of nighttime warming decreased fungal abundance by 6.28% (p < 0.05) and the ratio of fungi to bacteria by 6.76% (p < 0.01), which could be caused by the elevated soil temperature, reduced soil moisture, and increased grass cover. In addition, soil respiration enhanced with the decreasing fungi-to-bacteria ratio, but was not correlated with microbial biomass C during the 10 years, indicating that microbial composition may be more important than biomass in modulating soil respiration. These observations highlight the crucial role of soil microbial composition in regulating grassland C release under long-term climate warming, which facilitates an accurate assessment of climate-C feedback in the terrestrial biosphere.

[1]  Jinsheng He,et al.  Sustained increases in soil respiration accompany increased carbon input under long-term warming across global grasslands , 2022, Geoderma.

[2]  T. Kocsis,et al.  Biomonitoring and Assessment of Dumpsites Soil Using Phospholipid Fatty Acid Analysis (PLFA) Method—Evaluation of Possibilities and Limitations , 2022, Chemosensors.

[3]  M. Bahn,et al.  Long-Term Warming Reduced Microbial Biomass But Increased Recent Plant-Derived C in Microbes of a Subarctic Grassland , 2022, SSRN Electronic Journal.

[4]  Yuanfeng Hao,et al.  Litter removal exerts greater effects on soil microbial community than understory removal in a subtropical-warm temperate climate transitional forest , 2021, Forest Ecology and Management.

[5]  David J Van Horn,et al.  Environmental harshness mediates the relationship between aboveground and belowground communities in Antarctica , 2021, Soil Biology and Biochemistry.

[6]  Shuijin Hu,et al.  Sensitive Groups of Bacteria Dictate Microbial Functional Responses to Short-term Warming and N Input in a Semiarid Grassland , 2021, Ecosystems.

[7]  Davey L. Jones,et al.  Long-Term Drought and Warming Alter Soil Bacterial and Fungal Communities in an Upland Heathland , 2021, Ecosystems.

[8]  J. Xia,et al.  Plant functional types regulate non‐additive responses of soil respiration to 5‐year warming and nitrogen addition in a semi‐arid grassland , 2021, Functional Ecology.

[9]  Chunwang Xiao,et al.  Effects of warming on the bacterial community and its function in a temperate steppe. , 2021, The Science of the total environment.

[10]  Jizhong Zhou,et al.  Climate warming enhances microbial network complexity and stability , 2021, Nature Climate Change.

[11]  Jizhong Zhou,et al.  Long-term warming in a Mediterranean-type grassland affects soil bacterial functional potential but not bacterial taxonomic composition , 2021, NPJ biofilms and microbiomes.

[12]  Jing Liu,et al.  Effects of nightly warming and nitrogen application on the diversity of soil fungi in winter wheat in the lower reach of the Yangtze River , 2020, Archives of Agronomy and Soil Science.

[13]  J. Xia,et al.  Nighttime warming enhances ecosystem carbon‐use efficiency in a temperate steppe , 2020 .

[14]  Yiqi Luo,et al.  Meta-analysis of the impacts of global change factors on soil microbial diversity and functionality , 2020, Nature Communications.

[15]  X. Cui,et al.  Total and active soil fungal community profiles were significantly altered by six years of warming but not by grazing , 2019 .

[16]  T. Crowther,et al.  The global soil community and its influence on biogeochemistry , 2019, Science.

[17]  Hasbagan Ganjurjav,et al.  “Rare biosphere” plays important roles in regulating soil available nitrogen and plant biomass in alpine grassland ecosystems under climate changes , 2019, Agriculture, Ecosystems & Environment.

[18]  S. Frey,et al.  Warming alters fungal communities and litter chemistry with implications for soil carbon stocks , 2019, Soil Biology and Biochemistry.

[19]  T. Ezawa,et al.  How do arbuscular mycorrhizal fungi handle phosphate? New insight into fine-tuning of phosphate metabolism. , 2018, The New phytologist.

[20]  Jizhong Zhou,et al.  Climate warming leads to divergent succession of grassland microbial communities , 2018, Nature Climate Change.

[21]  S. Frey,et al.  Long-term pattern and magnitude of soil carbon feedback to the climate system in a warming world , 2017, Science.

[22]  S. Allison,et al.  Soil microbes and their response to experimental warming over time: A meta-analysis of field studies , 2017 .

[23]  W. Verstraete,et al.  Management of Microbial Communities through Transient Disturbances Enhances the Functional Resilience of Nitrifying Gas-Biofilters to Future Disturbances. , 2016, Environmental science & technology.

[24]  D. Wall,et al.  Are there links between responses of soil microbes and ecosystem functioning to elevated CO2, N deposition and warming? A global perspective , 2015, Global change biology.

[25]  J. Blanchard,et al.  Long-term forest soil warming alters microbial communities in temperate forest soils , 2015, Front. Microbiol..

[26]  A. Hodge,et al.  The direct response of the external mycelium of arbuscular mycorrhizal fungi to temperature and the implications for nutrient transfer , 2014 .

[27]  P. Ciais,et al.  Terrestrial carbon cycle affected by non-uniform climate warming , 2014 .

[28]  P. Ciais,et al.  Asymmetric effects of daytime and night-time warming on Northern Hemisphere vegetation , 2013, Nature.

[29]  Jizhong Zhou,et al.  Shifts in soil microorganisms in response to warming are consistent across a range of Antarctic environments , 2011, The ISME Journal.

[30]  K. Ma,et al.  Soil microbial community changes and their linkages with ecosystem carbon exchange under asymmetrically diurnal warming , 2011 .

[31]  M. Estiarte,et al.  Drought‐resistant fungi control soil organic matter decomposition and its response to temperature , 2011 .

[32]  Shiping Chen,et al.  Impacts of day versus night warming on soil microclimate: results from a semiarid temperate steppe. , 2010, The Science of the total environment.

[33]  Xinquan Zhao,et al.  Effects of grazing and experimental warming on DOC concentrations in the soil solution on the Qinghai-Tibet plateau , 2009 .

[34]  Jianyang Xia,et al.  Photosynthetic overcompensation under nocturnal warming enhances grassland carbon sequestration. , 2009, Ecology.

[35]  J. Xia,et al.  Effects of diurnal warming on soil respiration are not equal to the summed effects of day and night warming in a temperate steppe , 2009 .

[36]  Jerry M. Melillo,et al.  Soil Warming and Carbon-Cycle Feedbacks to the Climate System , 2002, Science.

[37]  John Harte,et al.  Plant community composition mediates both large transient decline and predicted long‐term recovery of soil carbon under climate warming , 2002 .