Global patterns of soil autotrophic respiration and its relation to climate, soil and vegetation characteristics

Tang, Xiaolu; Pei, Xiangjun; Lei, Ningfei; Luo, Xinrui; Liang, Lina; Shi, Leilei; Guo, Chen; Liang, Jingjing

doi:10.1016/j.geoderma.2020.114339

Cited by 43 publications

(17 citation statements)

References 54 publications

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“…All plant components including roots, shoots and leaves respire CO2 (referred to as the autotrophic respiration) [128]. The difference of the two large fluxes of photosynthesis (GPP) and autotrophic respiration is the net carbon gained by plants (Net Primary Production, NPP) that is allocated between the different plant components [53].…”

Section: Historymentioning

confidence: 99%

Advances in Land Surface Modelling

Blyth

Arora

Clark

et al. 2021

Curr Clim Change Rep

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Land surface models have an increasing scope. Initially designed to capture the feedbacks between the land and the atmosphere as part of weather and climate prediction, they are now used as a critical tool in the urgent need to inform policy about land-use and water-use management in a world that is changing physically and economically. This paper outlines the way that models have evolved through this change of purpose and what might the future hold. It highlights the importance of distinguishing between advances in the science within the modelling components, with the advances of how to represent their interaction. This latter aspect of modelling is often overlooked but will increasingly manifest as an issue as the complexity of the system, the time and space scales of the system being modelled increase. These increases are due to technology, data availability and the urgency and range of the problems being studied.

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Section: Historymentioning

confidence: 99%

Advances in Land Surface Modelling

Blyth

Arora

Clark

et al. 2021

Curr Clim Change Rep

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“…R a and R h are determined by a complex interaction of controlling factors, including soil temperature and moisture, soil pH, soil nutrient availability, substrate supply, and soil microbial community (Zhang et al 2014;Cheng et al 2015;Li et al 2018;Tang et al 2020). Among them, soil temperature is a dominant factor that affects R s and its components in forests (Wagai et al 2013;Miao et al 2020;Peng et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Different responses of soil respiration and its components to nitrogen and phosphorus addition in a subtropical secondary forest

Chen

Tian

2021

For. Ecosyst.

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Background Nitrogen (N) and phosphorus (P) deposition have largely affected soil respiration (Rs) in forest ecosystems. However, few studies have explored how N and P individually or in combination to influence Rs and its components (autotrophic respiration, Ra; heterotrophic respiration, Rh), especially in highly P-limited subtropical forests. To address this question, we conducted a field manipulation experiment with N and/or P addition in a 50-year-old subtropical secondary forest. Results We found that N addition on average reduced Rs, Ra, and Rh by 15.2%, 15%, and 11.7%, respectively during 2-year field study. P addition had an inconsistent effect on Ra, with Ra increasing by 50.5% in the first year but reducing by 26.6% in the second year. Moreover, P addition on average decreased Rh by 8.9%–30.9% and Rs by 6.7%–15.6% across 2 years. In contrast, N and P co-addition on average increased Rs, Ra, and Rh by 1.9%, 7.9%, and 2.1% during the experimental period. Though Rs and Rh were significantly correlated with soil temperature, their temperature sensitivities were not significantly changed by fertilization. Ra was predominantly regulated by soil nitrogen availability (NH4+ and NO3−), soil dissolved organic carbon (DOC), and enzyme activities, while the variation in Rh was mainly attributable to changes in soil microbial community composition and soil β-D-Cellubiosidase (CB) and β-Xylosidase (XYL) activities. Conclusion Our findings highlight the contrasting responses of Rs and its components to N or P addition against N and P co-addition, which should be differentially considered in biogeochemical models in order to improve prediction of forest carbon dynamics in the context of N and P enrichment in terrestrial ecosystems.

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“…Rh reflects the CO 2 released by the microbial decomposition of organic matter [69]. Therefore, Rs connects aboveground and underground carbon fractions [70] in terrestrial ecosystems and is significantly associated with a series of aboveground and underground plant traits and soil properties. However, it is difficult for researchers to obtain information on underground plant traits involving a certain spatial range.…”

Section: Discussionmentioning

confidence: 99%

Spatial Scale Effects of Soil Respiration in Arid Desert Tugai Forest: Responses to Plant Functional Traits and Soil Abiotic Factors

Wang

et al. 2022

Forests

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Understanding the spatial variation law of soil respiration (Rs) and its influencing factors is very important when simulating and predicting the terrestrial carbon cycle process. However, there are still limitations in understanding how different sampling scales affect the spatial heterogeneity of Rs and whether the spatial scale effect will change with habitat types. Our objectives were to explore the effects of different sampling scales on the spatial variability of Rs and the relative importance of soil abiotic characteristics and plant traits in influencing the spatial variability of Rs. The Rs, soil properties, and plant traits were measured through field investigation and indoor analysis in the Tugai forest desert plant community in the Ebinur Lake Basin in northwest China. The Rs showed significant water gradient changes, with a coefficient of variation of 35.4%–58%. Plot types had significant effects on Rs, while the change of sampling scale did not lead to significant differences in Rs. At the plot scale, Rs spatial variation at the 5 m × 5 m sampling scale mainly depended on plant traits (leaf length, leaf thickness, leaf dry matter content, and leaf phosphorus content, p < 0.05), while Rs spatial variation at the 10 m × 10 m scale mainly depended on soil properties (soil total phosphorus, ammonium nitrogen, soil water content, and pH, p < 0.05). At the local scale, soil nutrients (soil available phosphorus and ammonium nitrogen) and plant traits (maximum plant height, leaf length, and phosphorus content) at the 5 m × 5 m scale jointly explained 49% of the spatial change of Rs. In contrast, soil microclimate (soil water content), soil nutrients (soil pH, available phosphorus, and nitrate nitrogen), and plant traits (leaf thickness) jointly explained 51% of the spatial variation of Rs at the 10 m × 10 m scale. These results demonstrate the potential to predict the spatial variability of Rs based on the combination of easily measured aboveground functional traits and soil properties, which provides new ideas and perspectives for further understanding the mechanism of Rs change in Tugai forests.

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Global patterns of soil autotrophic respiration and its relation to climate, soil and vegetation characteristics

Cited by 43 publications

References 54 publications

Advances in Land Surface Modelling

Advances in Land Surface Modelling

Different responses of soil respiration and its components to nitrogen and phosphorus addition in a subtropical secondary forest

Spatial Scale Effects of Soil Respiration in Arid Desert Tugai Forest: Responses to Plant Functional Traits and Soil Abiotic Factors

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