Asymmetric responses of soil heterotrophic respiration to rising and decreasing temperatures

Li, Jie; He, Nianpeng; Xu, Li; Chai, Hua; Liu, Yuan; Wang, Deli; Wang, Ling; Wei, Xuehong; Xue, Jinghua; Wen, Xuefa; Sun, Xiaomin

doi:10.1016/j.soilbio.2016.12.002

Cited by 31 publications

(16 citation statements)

References 56 publications

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“…R-Mic was obtained from the NS plots, which increased from May and reached a peak in July or August, then declined gradually until October (Table 1) There was a significantly exponential relationships be-tween soil temperature at 5 cm depth and R-Mic (R2 = 0.702). Thus, the soil temperature is the most important factor that influences root growth (Qu et al 2009) and soil microbial respiration (Liang et al 2010;Karhu et al 2014;Li et al 2017). With increasing global temperatures, we might predict an increasing soil CO2 efflux contributed by soil.…”

Section: Discussionmentioning

confidence: 99%

Factors controlling soil microbial respiration during the growing season in a mature larch plantation in Northern Japan

Kitaoka

Koike

2017

J Soils Sediments

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Purpose Soil microbes contribute significantly to soil respiration (SR) in boreal forests; however, there is limited knowledge on microbial contributions from long field investigations. The objective of this study was to estimate soil microbial respiration, as well as its primary controlling factors, for a period of three consecutive years. Materials and methods A trenching method was used to distinguish soil microbial respiration (RMic) in a 55-year-old mature Japanese larch (Larix kaempferi) plantation in Northern Japan; the soil in which developed originally from volcanic soils containing pumice. We used a portable CO2 detection system to measure the soil respiration rate during the growing season. Environmental factors, soil physiochemical characteristics, and soil microbial biomass carbon and nitrogen (MBC and MBN) were analyzed to explain the seasonal variations of SR and RMic. Results and discussion The results showed that the estimated contribution of soil microbes to SR was 78, 62, and 55% during the three successive years, respectively. Respiration attributable to decomposition of aboveground litter contributed approximately 19% to SR. The major environmental factor that affected RMic was soil temperature at 5 cm depth, which accounted for more than 70% of the seasonal variation in RMic observed. There were close relations among MBC, MBN, and soil water content, but the soil water content showed no significant relation with RMic. Conclusions The RMic to SR varied from 78 to 55% following 3 years of trenching treatments. Our results demonstrated the important role of soil microbes on soil respiration in this larch forest. Soil temperature was the major positive factor that influ enced R-Mic, while soil water content had no significant effect. Global warming will increase the loss of C into the atmosphere by increasing the R-Mic, and could accelerate climate change.-Responsible editor: Yongfu Li Electronic supplementary material The online version of this article

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Section: Discussionmentioning

confidence: 99%

Factors controlling soil microbial respiration during the growing season in a mature larch plantation in Northern Japan

Kitaoka

Koike

2017

J Soils Sediments

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“…The pH was determined by the potentiometer in water. The organic carbon (OC) content of the soil was determined by the Walkley-Black method (Li et al, 2017).…”

Section: Edaphic Propertiesmentioning

confidence: 99%

Microbial Properties of Soil in Different Coverages in the Colombian Amazon

et al. 2019

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Changes in coverage affect the activity of soil's microbial communities, affecting the carbon and nitrogen cycle. The variability of biochemical properties in different coverages (native forest, forest plantation, silvopastoral system and pasture) located in the northwest of the Colombian Amazon was evaluated. Edaphic properties were determined as: organic carbon (OC), total nitrogen (TN), microbial biomass carbon (MBC) and microbial biomass nitrogen (MBN) using the fumigation method. A significant effect was found to land use × depth interaction for the variables moisture, pH, CO and MBC/OC ratio (p < 0.05), while MBC and dCO 2 showed differences only for land use and NT, MBN and MBN/TN ratio at depth (p < 0.05). In general, when modifying the soil cover, changes were made in the chemical properties that affected the microbial activity.

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“…MBC and MBN were measured by the fumigation-extraction method (Vance, Brookes, & Jenkinson, 1987). R s was measured 13 times using an Automatic Temperature Control Soil Flux System (PRI-8800; Pri-Eco, Beijing, China) as described in He et al (2013); this system has been successfully used in studies of Wang et al (2016), Liu et al (2016), and Li et al (2017). We calculated R s for day 0,1,2,4,6,9,13,19,32,39,45,52, and 61 of the incubation.…”

Section: Measurements Of Soil Physiochemical Properties and R Smentioning

confidence: 99%

Effects of temperature, soil substrate, and microbial community on carbon mineralization across three climatically contrasting forest sites

Tang

Sun

Luo

et al. 2017

Ecology and Evolution

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How biotic and abiotic factors influence soil carbon (C) mineralization rate (R S) has recently emerged as one of the focal interests in ecological studies. To determine the relative effects of temperature, soil substrate and microbial community on R s, we conducted a laboratory experiment involving reciprocal microbial inoculations of three zonal forest soils, and measured R S over a 61‐day period at three temperatures (5, 15, and 25°C). Results show that both R s and the cumulative emission of C (R cum), normalized to per unit soil organic C (SOC), were significantly affected by incubation temperature, soil substrate, microbial inoculum treatment, and their interactions (p < .05). Overall, the incubation temperature had the strongest effect on the R S; at given temperatures, soil substrate, microbial inoculum treatment, and their interaction all significantly affected both R s (p < .001) and R cum (p ≤ .01), but the effect of soil substrate was much stronger than others. There was no consistent pattern of thermal adaptation in microbial decomposition of SOC in the reciprocal inoculations. Moreover, when different sources of microbial inocula were introduced to the same soil substrate, the microbial community structure converged with incubation without altering the overall soil enzyme activities; when different types of soil substrate were inoculated with the same sources of microbial inocula, both the microbial community structure and soil enzyme activities diverged. Overall, temperature plays a predominant role in affecting R s and R cum, while soil substrate determines the mineralizable SOC under given conditions. The role of microbial community in driving SOC mineralization is weaker than that of climate and soil substrate, because soil microbial community is both affected, and adapts to, climatic factors and soil matrix.

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Asymmetric responses of soil heterotrophic respiration to rising and decreasing temperatures

Cited by 31 publications

References 56 publications

Factors controlling soil microbial respiration during the growing season in a mature larch plantation in Northern Japan

Factors controlling soil microbial respiration during the growing season in a mature larch plantation in Northern Japan

Microbial Properties of Soil in Different Coverages in the Colombian Amazon

Effects of temperature, soil substrate, and microbial community on carbon mineralization across three climatically contrasting forest sites

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