Continuous measurements of soil respiration with and without roots in a ponderosa pine plantation in the Sierra Nevada Mountains

Tang, Jianwu; Misson, Laurent; Gershenson, Alexander; Cheng, Weixin; Goldstein, Allen H.

doi:10.1016/j.agrformet.2005.07.011

Cited by 147 publications

(136 citation statements)

References 58 publications

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“…That is, seasonally driven soil respiration-temperature response curves appear to be largely adequate at predicting how future warming will alter fluxes of CO 2 from soils to the atmosphere. Nevertheless, the relative roles of autotrophic versus heterotrophic soil respiration and how these processes change with warming remains poorly defined but critical to understanding the strength of soil respiration feedbacks to climate change (30). In addition, it is unclear if the lack of difference in respiration response between control versus warmed treatments that we observe here will persist over the long term because the majority of the extant experiments have a relatively short duration (<5 y).…”

Section: Limited Evidence Of Acclimation Of Soil Respiration To Expermentioning

confidence: 51%

Temperature response of soil respiration largely unaltered with experimental warming

Carey

Tang

Templer

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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344

275

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The respiratory release of carbon dioxide (CO2) from soil is a major yet poorly understood flux in the global carbon cycle. Climatic warming is hypothesized to increase rates of soil respiration, potentially fueling further increases in global temperatures. However, despite considerable scientific attention in recent decades, the overall response of soil respiration to anticipated climatic warming remains unclear. We synthesize the largest global dataset to date of soil respiration, moisture, and temperature measurements, totaling >3,800 observations representing 27 temperature manipulation studies, spanning nine biomes and over 2 decades of warming. Our analysis reveals no significant differences in the temperature sensitivity of soil respiration between control and warmed plots in all biomes, with the exception of deserts and boreal forests. Thus, our data provide limited evidence of acclimation of soil respiration to experimental warming in several major biome types, contrary to the results from multiple single-site studies. Moreover, across all nondesert biomes, respiration rates with and without experimental warming follow a Gaussian response, increasing with soil temperature up to a threshold of ∼25 °C, above which respiration rates decrease with further increases in temperature. This consistent decrease in temperature sensitivity at higher temperatures demonstrates that rising global temperatures may result in regionally variable responses in soil respiration, with colder climates being considerably more responsive to increased ambient temperatures compared with warmer regions. Our analysis adds a unique cross-biome perspective on the temperature response of soil respiration, information critical to improving our mechanistic understanding of how soil carbon dynamics change with climatic warming.

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Section: Limited Evidence Of Acclimation Of Soil Respiration To Expermentioning

confidence: 51%

Temperature response of soil respiration largely unaltered with experimental warming

Carey

Tang

Templer

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

344

275

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“…Recent studies also found that the CA method could measure Rs comparably with the IRGA method if properly implemented and corrected (Grogan, 1998;Keith and Wong, 2006). The CO 2 gradient method has also been adopted by some researchers because of its minimal disturbance during the measurements (De Jong and Schappert, 1972;Tang et al, 2005b;Pingintha et al, 2010), but this method also has limitations, such as the empirically determined CO 2 diffusivity in soils and the disturbances to soils introduced by the initial installation of the CO 2 sensors. There have been a number of studies and reviews comparing different methods to measure Rs and discussing the strengths and limitations of each method (Hanson et al, 2000;Davidson et al, 2002b;Hibbard et al, 2005;Pendall et al, 2004;Ryan and Law, 2005).…”

Section: Methods and Challengesmentioning

confidence: 99%

Contribution of soil respiration to the global carbon equation

Shang

2016

Journal of Plant Physiology

157

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a b s t r a c tSoil respiration (Rs) is the second largest carbon flux next to GPP between the terrestrial ecosystem (the largest organic carbon pool) and the atmosphere at a global scale. Given their critical role in the global carbon cycle, Rs measurement and modeling issues have been well reviewed in previous studies. In this paper, we briefly review advances in soil organic carbon (SOC) decomposition processes and the factors affecting Rs. We examine the spatial and temporal distribution of Rs measurements available in the literature and found that most of the measurements were conducted in North America, Europe, and East Asia, with major gaps in Africa, East Europe, North Asia, Southeast Asia, and Australia, especially in dry ecosystems. We discuss the potential problems of measuring Rs on slope soils and propose using obliquely-cut soil collars to solve the existing problems. We synthesize previous estimates of global Rs flux and find that the estimates ranged from 50 PgC/yr to 98 PgC/yr and the error associated with each estimation was also high (4 PgC/yr to 33.2 PgC/yr). Using a newly integrated database of Rs measurements and the MODIS vegetation map, we estimate that the global annual Rs flux is 94.3 PgC/yr with an estimation error of 17.9 PgC/yr at a 95% confidence level. The uneven distribution of Rs measurements limits our ability to improve the accuracy of estimation. Based on the global estimation of Rs flux, we found that Rs is highly correlated with GPP and NPP at the biome level, highlighting the role of Rs in global carbon budgets.

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“…With soil CO 2 concentrations profiles, the location of production of CO 2 within the soil profile can be determined (Hashimoto and Komatsu 2006;Risk et al 2002b), but the calculation of soil respiration is dependent on the proper estimate of multiple physical factors such as: (1) variation in soil water content that change CO 2 diffusivity in the soil (Šimůnek and Suarez 1993); and (2) the proper estimation of tortuosity, soil texture, bulk density and porosity which are difficult to determine in rocky soils or water saturated soils (Jassal et al 2005;Pumpanen et al 2008;Turcu et al 2005). Despite limitations of both methods, when used in combination, multiple studies have shown good agreement between the two (Jassal et al 2005;Tang et al 2005b;Turcu et al 2005;Vargas and Allen 2008b).…”

Section: Continuous Measurements Of Soil Respirationmentioning

confidence: 99%

Frontiers and challenges in soil respiration research: from measurements to model-data integration

et al. 2010

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Soil respiration, the flux of CO 2 from the soil to the atmosphere represents a major flux in the global carbon cycle. Our ability to predict this flux remains limited because of multiple controlling mechanisms that interact over different temporal and spatial scales. However, new advances in measurement and analyses present an opportunity for the scientific community to improve the understanding of the mechanisms that regulate soil respiration. In this paper, we address several recent advancements in soil respiration research from experimental measurements and data analysis to new considerations for modeldata integration. We focus on the links between the soil-plant-atmosphere continuum at short (i.e., diel) and medium (i.e., seasonal-years) temporal scales. First, we bring attention to the importance of identifying sources of soil CO 2 production and highlight the application of automated soil respiration measurements and isotope approaches. Second, we discuss the need of quality assurance and quality control for applications in time series analysis. Third, we review perspectives about emergent ideas for modeling development and model-data integration for soil respiration research. Finally, we call for stronger interactions between modelers and experimentalists as a way to improve our understanding of soil respiration and overall terrestrial carbon cycling.

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Continuous measurements of soil respiration with and without roots in a ponderosa pine plantation in the Sierra Nevada Mountains

Cited by 147 publications

References 58 publications

Temperature response of soil respiration largely unaltered with experimental warming

Temperature response of soil respiration largely unaltered with experimental warming

Contribution of soil respiration to the global carbon equation

Frontiers and challenges in soil respiration research: from measurements to model-data integration

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