DOI: 10.1002/2018JG004432
Scopus记录号: 2-s2.0-85044868803
论文题名: Long-Term Stimulatory Warming Effect on Soil Heterotrophic Respiration in a Cool-Temperate Broad-Leaved Deciduous Forest in Northern Japan
作者: Teramoto M. ; Liang N. ; Ishida S. ; Zeng J.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期: 4 起始页码: 1161
结束页码: 1177
语种: 英语
英文关键词: Asian monsoon forests
; automated chamber
; deciduous forest
; global warming
; heterotrophic respiration
; soil organic carbon
英文摘要: To evaluate the long-term response of soil organic carbon decomposition to global warming in Asian monsoon forests, we established a multichannel automated chamber system combined with infrared carbon-filament heat lamps in a 70-year-old cool-temperate broad-leaved deciduous forest in northern Japan in September 2011. We designed control plots to measure total soil respiration (Rs), root exclusion (trenched) plots to measure heterotrophic respiration (Rh), and warmed trenched plots to measure Rh under warmed conditions (+2.5°C soil temperature at 5 cm depth, Rhw). Annual effluxes ranged from 12.02 to 14.15 tC ha−1 in Rs, 7.78 to 11.49 tC ha−1 in Rh, and 8.76 to 15.25 tC ha−1 in Rhw over five years (2012–2016). During the summer season (between July and September), the daily warming effect was negatively related to soil temperature. In comparison, the relationship between soil moisture and the daily warming effect varied in each year depending on soil moisture levels. The annual warming effect exhibited large interannual variation, ranging from 6.2 to 17.7% °C−1; however, the five year average (10.9% °C−1) was close to the estimated value (10.2% °C−1) based on the annual Q10 of Rh (2.66). Interannual variation was positively related to the number of rainy days (p = 0.013). Our results indicate that existing global terrestrial models underestimate the strength of the feedback of Rh to global warming in Asian monsoon forests, because most global terrestrial models used relatively low Q10 values (usually below 2.0). ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114221
Appears in Collections: 气候减缓与适应
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作者单位: Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Japan; Graduate School of Science and Technology, Hirosaki University, Hirosaki, Japan
Recommended Citation:
Teramoto M.,Liang N.,Ishida S.,et al. Long-Term Stimulatory Warming Effect on Soil Heterotrophic Respiration in a Cool-Temperate Broad-Leaved Deciduous Forest in Northern Japan[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(4)