Premium
Impacts of elevated CO 2 and temperature on soil respiration in warm temperate evergreen Quercus glauca stands: an open‐top chamber experiment
Author(s) -
Wang Xin,
Nakatsubo Takayuki,
Nakane Kaneyuki
Publication year - 2012
Publication title -
ecological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.628
H-Index - 68
eISSN - 1440-1703
pISSN - 0912-3814
DOI - 10.1007/s11284-012-0932-x
Subject(s) - evergreen , soil respiration , respiration , temperate climate , respiration rate , temperate forest , temperate rainforest , environmental science , horticulture , zoology , chemistry , botany , ecosystem , biology , ecology
We conducted an open‐top chamber experiment for 3 years to examine the effect of elevated CO 2 and temperature on soil respiration in experimental stands of Quercus glauca , an evergreen tree species common in the warm temperate zone of Japan. Seedlings of Q. glauca were planted in open‐top chambers and treated with factorial combinations of ambient and elevated (ambient × 1.4, ambient × 1.8) CO 2 concentrations and ambient and elevated (+3°C) air temperatures. Elevated CO 2 significantly increased the total soil respiration rate ( P < 0.001) and the soil respiration rate at 15°C ( R 15 ) ( P < 0.05) but had no significant effect on the temperature coefficient Q 10 . Although temperature significantly affected total soil respiration rate ( P < 0.05), neither the R 15 nor the Q 10 of total soil respiration was affected significantly by the air temperature increase. Annual soil respiration rate, estimated from R 15 , Q 10 , and soil temperature data, tended to increase with elevated CO 2 concentration. These results suggest that soil respiration rate in Japanese warm temperate broad‐leaved forests dominated by Q. glauca is sensitive to elevated CO 2 and is likely to increase under future climatic conditions.