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Characteristics of stem respiration in black spruce (Picea mariana) stand, interior Alaska

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Characteristics of stem respiration in black spruce (Picea mariana) stand, interior Alaska
Other Titles
알래스카 내륙 블랙 스프러스의 줄기호흡 특성
Kim, Yongwon
Lee, Bang-Yong
Kim, Seong-Deog
Suzuki, Rikie
Environmental Sciences & EcologyGeology
Stem respirationTemperature of air and stemBlack spruce forestAlaska
Issue Date
Kim, Yongwon, et al. 2021. "Characteristics of stem respiration in black spruce (Picea mariana) stand, interior Alaska". POLAR SCIENCE, 29: 1-8.
Boreal forests account for roughly one third of the carbon sequestered in terrestrial ecosystems, and the high latitude boreal ecosystem they make up has been consequently vulnerable to recent climate change. This study investigated stem respiration of Alaska dominant black spruce trees in interior Alaska during the growing season of 2007. The continuous measurement of stem respiration was conducted in black spruce trees of four different ages (4.3, 7.2, 9.8, and 13.5 cm in diameter at breast height (DBH)) in interior Alaska, using a CO2 analyzer, a 12-V pump, chambers, and a data-logger. Mean stem respiration is 0.014 +/- 0.006 mg CO2 m(-2) s(-1) (range 0.003-0.039 mg CO2 m(-2) s(-1)) in different aged four black spruce trees, indicating remarkably temporal variations in stem respiration with temperatures in air and stem. We found that metabolism is 1.5-fold higher in the younger black spruce tree than in the older. Temperatures in air and stem are significant regulators in regulating stem respiration. The stand-level annual stem respiration simulated by Q(10) value based on air temperature is 73.9 g CO2 m(-2), corresponding to 5.0% of the ecosystem respiration (Re) estimated by eddy covariance tower in 2007. Our findings demonstrate that stem respiration is a significant component in the scaleup of the regional carbon budget in a black spruce forest of interior Alaska.
기타(미국 알래스카 북극권에서의 식생 변화 특성 분석 논문 (Available online 20 May 2021) (in press))
Appears in Collections  
2021-2021, Interrelationship Investigation and Comprehensive Monitoring based on Permafrost-Atmospheric Environment (21-21) / Lee, Bang Yong (PN21011)
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