Abstract

Authors

KOMINAMI Yuji, JOMURA Mayuko, ATAKA Mioko, TAMAI Koji, MIYAMA Takafumi

Year

2012

Title

Heterotrophic respiration causes seasonal hysteresis in soil respiration in a warm-temperate forest

Journal

Journal of Forest Research

Volume

TBD

Page

TBD

DOI

doi:10.1007/s10310-011-0315-0

Keywords

Heterotrophic respiration, Leaf litter respiration, Organic matter, RothC model, Soil respiration

URL

http://www.springerlink.com/content/c14227165q274230/

Abstract

To assess the effect of changes in organic litter stock on seasonal changes in heterotrophic respiration (R H), soil respiration (R S), and total ecosystem respiration (R E), we measured seasonal changes in leaf litter respiration (R LL) by the chamber method and estimated the seasonal change in total R H using the RothC model in a warm-temperate mixed deciduous-evergreen forest in Japan. Both R E and R S had seasonal hysteresis and were higher in spring than at the same temperature during autumn. Under warm and humid conditions, the rate of decomposition of newly supplied leaf litter in one year was high (60% loss). Consequently, R LL and R H were higher in spring after leaf drop, when more fresh material was available, than in autumn. In this study, 42 and 88% of the difference in R E and R S between spring and autumn (soil temperature 16-18C) could be accounted for by the difference in R H, respectively, and 71% of the difference in R H could be accounted for by the difference in R LL. This study showed that seasonal changes in heterotrophic respiration (R LL and R H) could be a major factor in the seasonal hysteresis of R E and R S.

Site

YMS

Remarks

online first