Autotrophic and heterotrophic respiration in needle fir and Quercus-dominated stands in a cool-temperate forest, central Korea.
To investigate annual variation in soil respiration (R (S)) and its components [autotrophic (R (A)) and heterotrophic (R (H))] in relation to seasonal changes in soil temperature (ST) and soil water content (SWC) in an Abies holophylla stand (stand A) and a Quercus-dominated stand (stand Q), we set up trenched plots and measured R (S), ST and SWC for 2 years. The mean annual rate of R (S) was 436 mg CO(2) m(-2) h(-1), ranging from 76 to 1,170 mg CO(2) m(-2) h(-1), in stand A and 376 mg CO(2) m(-2) h(-1), ranging from 82 to 1,133 mg CO(2) m(-2) h(-1), in stand Q. A significant relationship between R (S) and its components and ST was observed over the 2 years in both stands, whereas a significant correlation between R (A) and SWC was detected only in stand Q. On average over the 2 years, R (A) accounted for approximately 34% (range 17-67%) and 31% (15-82%) of the variation in R (S) in stands A and Q, respectively. Our results suggested that vegetation type did not significantly affect the annual mean contributions of R (A) or R (H), but did affect the pattern of seasonal change in the contribution of R (A) to R (S).
Lee
Na-Yeon
NY
Division of Environmental Science and Ecological Engineering, Korea University, Anam-Dong, Seongbuk-Gu, Seoul, 136-713, Korea.
Koo
Jin-Woo
JW
Noh
Nam Jin
NJ
Kim
Joon
J
Son
Yowhan
Y
D028202:Abies / Q000166:cytology / Q000378:metabolism*; D052818:Autotrophic Processes / Q000502:physiology*; D001419:Bacteria / Q000378:metabolism; D019069:Cell Respiration; D003081:Cold Climate; D017753:Ecosystem; D005452:Fluoresceins / Q000378:metabolism; D052836:Heterotrophic Processes / Q000502:physiology*; D006868:Hydrolysis; D007723:Korea; D018515:Plant Leaves / Q000166:cytology / Q000378:metabolism*; D029963:Quercus / Q000166:cytology / Q000378:metabolism*; D012621:Seasons; D012987:Soil / Q000032:analysis; D013696:Temperature; D014197:Trees / Q000378:metabolism*; D014867:Water / Q000032:analysis
D005452:Fluoresceins; D012987:Soil; D014867:Water; C018506:diacetylfluorescein