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Evaluating the influences of measurement time and frequency on soil respiration in a semiarid temperate grassland

  • Letter
  • Ecology
  • Published:
Chinese Science Bulletin

Abstract

Soil respiration (Soil R) is one of the largest CO2 fluxes from terrestrial ecosystems to the atmosphere. The largely seasonal and daily patterns of Soil R in semiarid grassland ecosystems indicate that measurement time and frequency would have significant influences on the assessment of seasonal soil carbon release. Based on a three-year continuous measurement of Soil R in a semiarid grassland, we found that the Soil R value measured at around 10:00 o’clock local time was the closest to its daily mean, while the value at 14:00 o’clock was found to be the highest daily rate. A measurement frequency higher than every 10 days was necessary for estimating the seasonal Soil R and its temperature sensitivity (Q 10) reasonably. Our study would be useful as guidelines for manual Soil R measurements and model data selection in semiarid temperate grasslands.

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Acknowledgments

We thank Hanlin Zhao, Shan Li, and Fang Wang for their helps on field measurements. We thank Nate Mikle also for his help in our English writing. This work was supported in part by the “Strategic Priority Research Program - Climate Change: Carbon Budget and Relevant Issues” of the Chinese Academy of Sciences (XDA05050402), the National Natural Science Foundation of China (31170453) and a Selected Young Scientist Program supported by the State Key Laboratory of Vegetation and Environment Change.

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Correspondence to Shiping Chen.

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Zhang, B., Yang, Z., Chen, S. et al. Evaluating the influences of measurement time and frequency on soil respiration in a semiarid temperate grassland. Chin. Sci. Bull. 59, 2726–2730 (2014). https://doi.org/10.1007/s11434-014-0265-y

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  • DOI: https://doi.org/10.1007/s11434-014-0265-y

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