X—Ñ—§’n55i2jC139`143 2013

Jpn J For Environ 55 (2), 139\143, 2013

 

Responses of microbial community to soil warming

in warm-temperate evergreen broad-leaved forests

 

Xin Wang1, Takayuki Nakatsubo1, Akiko Sasaki1,

Shinpei Yoshitake2, Naishen Liang3 and Kaneyuki Nakane1

1Department of Environmental Dynamics and Management, Graduate School of Biosphere Science, Hiroshima University

2Takayama Experimental Field Station, River Basin Research Center, Gifu University

3CGER, National Institute for Enviromental studies, Tskuba

 

To elucidate the effect of climate warming on the soil heterotrophic microbial community in warm-temperate, evergreen broad-leaved forests, we conducted a soil-warming experiment in a secondary forest located in the city of Higashi-Hiroshima in western Japan. We established ten trench plots (1 m ~ 1 m) with root barriers to prevent root regrowth in the forest. The plots were divided into warming and control treatments. Infrared heaters were used to increase the soil temperature of the warming plots by about 2.5Ž for three years. We used phospholipid fatty acid (PLFA) analysis to examine the composition of the soil heterotrophic microbial community. There were no significant differences in the total content of PLFAs (TotPLFAs) and fungal PLFAs (FungPLFAs) between the warming and control plots. However, warming caused an increase in the amount of bacterial PLFAs (BactPLFAs), the result being a lower ratio of FungPLFAs to BactPLFAs (F/B ratio) in the warming plots. In addition, PLFAs characteristic of gram-negative bacteria increased in the warming plots. The results indicated that the soil heterotrophic microbial community in this warm-temperate, evergreen broad-leaved forest was sensitive to climate warming.

Key Words : evergreen broad-leaved forest, microbial community composition, phospholipid fatty acid (PLFA), soil warming, warm-temperate zone

 

‰¤VE’†’؍F”VE²X–؏»ŽqE‹g’|W•½E—À”T\E’†ªŽü•àF’g‰·‘яí—΍L—tŽ÷—Ñ‚É‚¨‚¯‚é“yë‰Á‰·‚ɑ΂·‚é”÷¶•¨ŒQW‚Ì”½‰žDX—Ñ—§’n55F139-143, 2013

¨Back to Home