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Spatial-Temporal Changes of Soil Respiration across China and the Response to Land Cover and Climate Change

1
School of Public Management, Guangdong University of Finance & Economics, Guangzhou 510320, China
2
School of Geography & Ocean Sciences, Nanjing University, Nanjing 210023, China
3
Guangzhou Institute of Forestry and Landscape Architecture, Guangzhou 510405, China
4
School of Geographical Science, Guangzhou University, Guangzhou 510006, China
*
Authors to whom correspondence should be addressed.
Sustainability 2018, 10(12), 4604; https://doi.org/10.3390/su10124604
Received: 24 October 2018 / Revised: 24 November 2018 / Accepted: 27 November 2018 / Published: 5 December 2018
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Abstract

Soil respiration (Rs) plays an important role in the carbon budget of terrestrial ecosystems. Quantifying the spatial and temporal variations in Rs in China at the regional scale helps improve our understanding of the variations in terrestrial carbon budgets that occur in response to global climate and environmental changes and potential future control measures. In this study, we used a regional-scale geostatistical model that incorporates gridded meteorological and pedologic data to evaluate the spatial Rs variations in China from 2000 to 2013. We analysed the relationship between Rs and environmental factors, and suggest management strategies that may help to keep the terrestrial carbon balance. The simulated results demonstrate that the mean annual Rs value over these 14 years was 422 g/m2/year, and the corresponding total amount was 4.01 Pg C/year. The Rs estimation displayed a clear spatial pattern and a slightly increasing trend. Further analysis also indicated that high Rs values may occur in areas that show a greater degree of synchronicity in the timing of their optimal temperature and moisture conditions. Moreover, cultivated vegetation exhibits higher Rs values than native vegetation. Finally, we suggest that specific conservation efforts should be focused on ecologically sensitive areas where the Rs values increase significantly. View Full-Text
Keywords: soil respiration; spatial-temporal changes; environmental factors; trend analysis soil respiration; spatial-temporal changes; environmental factors; trend analysis
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Wen, J.; Chuai, X.; Li, S.; Song, S.; Li, J.; Guo, X.; Yang, L. Spatial-Temporal Changes of Soil Respiration across China and the Response to Land Cover and Climate Change. Sustainability 2018, 10, 4604.

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