Extreme rainfall and snowfall alter responses of soil respiration to nitrogen fertilization: a 3‐year field experiment

Chen, Zengming; Xu, Yehong; Zhou, Xuhui; Tang, Jianwu; Kuzyakov, Yakov; Yu, Haiying; Fan, Jianling; Ding, Weixin

doi:10.1111/gcb.13620

Cited by 47 publications

(34 citation statements)

References 85 publications

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“…The AP7 explained 24%-37% (mean: 31%) and 28%-38% (mean: 35%) of the temporal variations in R s on the TG and BF hillslopes, respectively. Positive relationships between R s and precipitation were also found by Chen et al [13] and Zhou et al [8], while some other studies demonstrated that increased precipitation could reduce R s due to the slow gas diffusion [15,42]. In this study, the relative lower explanation rates (<30%) of AP7 on R s in TG-03, BF-03, and BF-04 were due to the wet soil conditions at these sites ( Table 2).…”

Section: Factors Influencing R S Response To Precipitationsupporting

confidence: 75%

“…Liu et al [11] found that at extremely high ST (e.g., >28 • C), R s declined due to insufficient SWC. Carey et al [12] reported a universal decline in the temperature sensitivity (Q 10 ) of R s with ST > 25 • C, and this result may be due to low SWC at high ST. Precipitation influences R s through two related mechanisms: one is stimulating the exchanges of substrates and gases in soil pores by rain dripping; the other is improving the connectivity of substrates through increasing SWC [11,13]. Generally, increased precipitation has a positive effect on R s [8,13,14].…”

Section: Introductionmentioning

confidence: 99%

“…Carey et al [12] reported a universal decline in the temperature sensitivity (Q 10 ) of R s with ST > 25 • C, and this result may be due to low SWC at high ST. Precipitation influences R s through two related mechanisms: one is stimulating the exchanges of substrates and gases in soil pores by rain dripping; the other is improving the connectivity of substrates through increasing SWC [11,13]. Generally, increased precipitation has a positive effect on R s [8,13,14]. However, in regions with high precipitation inputs or soils with low water-holding capacity, increased precipitation can reduce the R s because R s declines at SWC exceeding field capacity due to slow diffusion of O 2 [11,15,16].…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies generally focused on the responses of R s to the climatic variables, like ST, precipitation, and SWC at plot scales [8,13]. Despite these generalizations across regions within hillslope scales, soil properties and topographic features create great spatial heterogeneity [3,19] that change the spatial distribution of SWC, soil gas concentration, soil nutrients, and even the ST, and thus can induce the spatial heterogeneity of R s [4,7].…”

Section: Introductionmentioning

confidence: 99%

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Soil Type, Topography, and Land Use Interact to Control the Response of Soil Respiration to Climate Variation

Chun

Lai

Zhu

et al. 2019

Forests

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The effects of soil and topography on the responses of soil respiration (Rs) to climatic variables must be investigated in the southeastern mountainous areas of China due to the rapid land-use change from forest to agriculture. In this study, we investigated the response of Rs to soil temperature (ST), precipitation over the previous seven days (AP7), and soil water content (SWC) across two hillslopes that had different land uses: a tea garden (TG) and a bamboo forest (BF). Meanwhile, the roles of soil properties including soil clay content and total nitrogen (TN), and topography including elevation, profile curvature (PRC), and slope on the different responses of Rs to these climatic variables were investigated. Results showed that mean Rs on the BF hillslope (2.21 umol C m−2 s−1) was 1.71 times of that on the TG hillslope (1.29 umol C m−2 s−1). Soil clay content, elevation, and PRC had negative correlations (p < 0.05) with spatial variation of Rs, and ST was positively correlated (p < 0.01) with temporal variation of Rs on both hillslopes. Across both hillslopes ST explained 33%–73% and AP7 explained 24%–38% of the temporal variations in Rs. The mean temperature sensitivities (Q10s) of Rs were 2.02 and 3.22, respectively, on the TG and BF hillslopes. The Q10 was positively correlated (p < 0.05) with the temporal mean of SWC and TN, and negatively correlated (p < 0.05) with clay and slope. The mean AP7 sensitivities (a concept similar to Q10) were greatly affected by clay and PRC. When Rs was normalized to that at 10 °C, power or quadratic relationships between Rs and SWC were observed in different sites, and the SWC explained 12%–32% of the temporal variation in Rs. When ST and SWC were integrated and considered, improved explanations (45%–81%) were achieved for the Rs temporal variation. In addition, clay and elevation had vital influences on the responses of Rs to SWC. These results highlight the influences of soil, topographic features, and land use on the spatial variations of the Rs, as well as on the responses of Rs to different climatic variables, which will supplement the understanding of controlling mechanisms of Rs on tea and bamboo land-use types in Southeastern China.

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Section: Factors Influencing R S Response To Precipitationsupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Soil Type, Topography, and Land Use Interact to Control the Response of Soil Respiration to Climate Variation

Chun

Lai

Zhu

et al. 2019

Forests

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“…The frequent occurrence of rainfall extremes produces multiple disasters, including urban flooding, server soil erosion, landslides and debris flows [1]. Moreover, rainfall extremes affect the ecological process of the terrestrial ecosystem [2,3]. The spatial patterns of extreme precipitation trends exhibit heterogeneous characteristics, especially at a smaller scale, due to factors including warming, water vapor trends and topography differences [4,5].…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Variations of Extreme Precipitation under a Changing Climate in the Three Gorges Reservoir Area (TGRA)

et al. 2018

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Abstract:The Three Gorges Dam (TGD) is one of the largest hydroelectric projects in the world. Monitoring the spatiotemporal distribution of extreme precipitation offers valuable information for adaptation and mitigation strategies and reservoir management schemes. This study examined variations in extreme precipitation over the Three Gorges Reservoir area (TGRA) in China to investigate the potential role of climate warming and Three Gorges Reservoir (TGR). The trends in extreme precipitation over the TGRA were investigated using the iterative-based Mann-Kendall (MK) test and Sen's slope estimator, based on weather station daily data series and TRMM (Tropical Rainfall Measuring Mission) data series. The mean and density distribution of extreme precipitation indices between pre-dam and post -dam, pre-1985 and post-1985, and near and distant reservoir area were assessed by the Mann-Whitney test and the Kolmogorov-Smirnov test. The ratio of extreme precipitation to non-extreme precipitation became larger. The precipitation was characterized by increases in heavy precipitation as well as decreases in light and moderate rain. Comparing extreme precipitation indices between pre-1985 (cooling) and post-1985 (warming) indicated extreme precipitation has changed to become heavier. Under climate warming, the precipitation amount corresponding to more than the 95th percentile increased at the rate of 6.48%/ • C. Results from comparing extreme precipitation for the pre-and post-dam, near reservoir area (NRA) and away from the reservoir area (ARA) imply an insignificant role of the TGR on rainfall extremes over the TGRA. Moreover, the impoundment of TGR did not exert detectable impacts on the surface relative humidity (RH) and water vapor pressure (WP).

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Precipitation variability drives the reduction of total soil respiration and heterotrophic respiration in response to nitrogen addition in a temperate forest plantation

2019

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Extreme rainfall and snowfall alter responses of soil respiration to nitrogen fertilization: a 3‐year field experiment

Cited by 47 publications

References 85 publications

Soil Type, Topography, and Land Use Interact to Control the Response of Soil Respiration to Climate Variation

Soil Type, Topography, and Land Use Interact to Control the Response of Soil Respiration to Climate Variation

Spatiotemporal Variations of Extreme Precipitation under a Changing Climate in the Three Gorges Reservoir Area (TGRA)

Precipitation variability drives the reduction of total soil respiration and heterotrophic respiration in response to nitrogen addition in a temperate forest plantation

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