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Forests 2017, 8(3), 56;

Effect of Soil Moisture on the Response of Soil Respiration to Open-Field Experimental Warming and Precipitation Manipulation

Department of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Korea
Department of Biological and Environmental Sciences, Qatar University, Doha 2713, Qatar
Author to whom correspondence should be addressed.
Academic Editors: Robert Jandl and Mirco Rodeghiero
Received: 22 December 2016 / Revised: 21 February 2017 / Accepted: 23 February 2017 / Published: 25 February 2017
(This article belongs to the Special Issue Forest Soil Respiration under Climate Changing)
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Soil respiration (RS, Soil CO2 efflux) is the second largest carbon (C) flux in global terrestrial ecosystems, and thus, plays an important role in global and regional C cycling; moreover, it acts as a feedback mechanism between C cycling and global climate change. RS is highly responsive to temperature and moisture, factors that are closely related to climate warming and changes in precipitation regimes. Here, we examined the direct and interactive effects of climate change drivers on RS of Pinus densiflora Sieb. et Zucc. seedlings in a multifactor climate change experiment involving atmospheric temperature warming (+3 °C) and precipitation manipulations (−30% and +30%). Our results indicated that atmospheric temperature warming induced significant changes in RS (p < 0.05), enhancing RS by an average of 54.6% and 59.7% in the control and elevated precipitation plots, respectively, whereas atmospheric temperature warming reduced RS by 19.4% in plots subjected to lower rates of precipitation. However, the warming effect on RS was influenced by soil moisture. On the basis of these findings, we suggest that atmospheric temperature warming significantly influenced RS, but the warming effect on RS may be weakened by warming-induced soil drying in water-limited environments. View Full-Text
Keywords: soil respiration; climate change; warming effect; soil moisture soil respiration; climate change; warming effect; soil moisture

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Li, G.; Kim, S.; Han, S.H.; Chang, H.; Son, Y. Effect of Soil Moisture on the Response of Soil Respiration to Open-Field Experimental Warming and Precipitation Manipulation. Forests 2017, 8, 56.

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