气候变化领域集成服务门户(CCPortal): The Temperature Sensitivity (Q10) of Soil Respiration: Controlling Factors and Spatial Prediction at Regional Scale Based on Environmental Soil Classes

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DOI	10.1002/2017GB005644
	The Temperature Sensitivity (Q10) of Soil Respiration: Controlling Factors and Spatial Prediction at Regional Scale Based on Environmental Soil Classes
	Meyer N.; Welp G.; Amelung W.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	306
结束页码	323
卷号	32 期号:2
英文摘要	The temperature sensitivity of heterotrophic soil respiration is crucial for modeling carbon dynamics but it is variable. Presently, however, most models employ a fixed value of 1.5 or 2.0 for the increase of soil respiration per 10°C increase in temperature (Q10). Here we identified the variability of Q10 at a regional scale (Rur catchment, Germany/Belgium/Netherlands). We divided the study catchment into environmental soil classes (ESCs), which we define as unique combinations of land use, aggregated soil groups, and texture. We took nine soil samples from each ESC (108 samples) and incubated them at four soil moisture levels and five temperatures (5–25°C). We hypothesized that Q10 variability is controlled by soil organic carbon (SOC) degradability and soil moisture and that ESC can be used as a widely available proxy for Q10, owing to differences in SOC degradability. Measured Q10 values ranged from 1.2 to 2.8 and were correlated with indicators of SOC degradability (e.g., pH, r = −0.52). The effect of soil moisture on Q10 was variable: Q10 increased with moisture in croplands but decreased in forests. The ESC captured significant parts of Q10 variability under dry (R2 = 0.44) and intermediate (R2 = 0.36) moisture conditions, where Q10 increased in the order cropland
英文关键词	CO2; soil moisture; soil organic matter; soil respiration; soil temperature
语种	英语
scopus关键词	carbon flux; catchment; factor analysis; forest soil; grassland soil; prediction; sensitivity analysis; soil moisture; soil organic matter; soil respiration; soil temperature; spatial analysis; temperature effect; Belgium; Germany; Netherlands
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129856
作者单位	Institute of Crop Science and Resource Conservation, Soil Science and Soil Ecology, University of Bonn, Bonn, Germany
推荐引用方式 GB/T 7714	Meyer N.,Welp G.,Amelung W.. The Temperature Sensitivity (Q10) of Soil Respiration: Controlling Factors and Spatial Prediction at Regional Scale Based on Environmental Soil Classes[J],2018,32(2).
APA	Meyer N.,Welp G.,&Amelung W..(2018).The Temperature Sensitivity (Q10) of Soil Respiration: Controlling Factors and Spatial Prediction at Regional Scale Based on Environmental Soil Classes.Global Biogeochemical Cycles,32(2).
MLA	Meyer N.,et al."The Temperature Sensitivity (Q10) of Soil Respiration: Controlling Factors and Spatial Prediction at Regional Scale Based on Environmental Soil Classes".Global Biogeochemical Cycles 32.2(2018).