Ecological Research

, Volume 27, Issue 2, pp 445–452

Effects of environmental factors upon variation in soil respiration of a Zoysia japonica grassland, central Japan

Original Article

DOI: 10.1007/s11284-011-0918-0

Cite this article as:
Inoue, T. & Koizumi, H. Ecol Res (2012) 27: 445. doi:10.1007/s11284-011-0918-0
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Abstract

The effects of environmental factors on seasonal and annual variations in soil respiration were examined in the cool temperate Zoysia japonica grassland of Japan. Field measurements of soil respiration were conducted using a closed chamber method with an infrared gas analyzer at monthly intervals in the snow-free seasons from May 2007 to December 2009. There was an exponential relationship between soil respiration and soil temperature, and the soil temperature accounted for 85–86% of seasonal soil respiration variability. Moreover, a positive linear relationship between soil respiration and soil water content was detected in summer (R2 = 0.55, p < 0.001), but not in spring or autumn. Annual soil respiration was estimated at 755, 719, and 1,037 g C m−2 year−1 in 2007, 2008, and 2009, respectively. These interannual variations in soil respiration might be influenced by the strength of precipitation during rainy seasons and the timing of each snow-melt. Our results suggest that the effects of rainfall and snow-melt events on soil respiration might be important factors to understand carbon dynamics in grassland ecosystem in Japan.

Keywords

Soil CO2 flux Long-term measurement Controlling factors Precipitation Snow melt 

Copyright information

© The Ecological Society of Japan 2012

Authors and Affiliations

  1. 1.Graduate School of Advanced Science and EngineeringWaseda UniversityShinjukuJapan
  2. 2.Faculty of Education and Integrated Arts and SciencesWaseda UniversityShinjukuJapan

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