气候变化领域集成服务门户(CCPortal): Convergence in temperature sensitivity of soil respiration: Evidence from the Tibetan alpine grasslands

CCPortal

DOI	10.1016/j.soilbio.2018.04.005
	Convergence in temperature sensitivity of soil respiration: Evidence from the Tibetan alpine grasslands
	Wang, Yonghui; Song, Chao; Yu, Lingfei; Mi, Zhaorong; Wang, Shiping; Zeng, Hui; Fang, Changming; Li, Jingyi; He, Jin-Sheng
通讯作者	He, JS (通讯作者)
发表日期	2018
ISSN	0038-0717
EISSN	1879-3428
起始页码	50
结束页码	59
卷号	122
英文摘要	Recent studies proposed a convergence in the temperature sensitivity (Q(10)) of soil respiration (R-s) after eliminating confounding effects using novel approaches such as Singular Spectrum Analysis (SSA) or the mixed effects model (MEM) method. However, SSA has only been applied to eddy covariance data for estimating the Q(10) with air temperature, which may result in underestimations in responses of below-ground carbon cycling processes to climate warming in coupled climate-carbon models; MEM remains untested for its suitability in single-site studies. To examine the unconfounded Q(10) of R-s these two novel methods were combined with directly measured R-s for 6 years in two Tibetan alpine ecosystems. The results showed that, 1) confounded Q(10) of Rs estimated from seasonal R-s-temperature relationship positively correlated with the seasonality of R-s and 2) estimates of unconfounded Q(10) of R-s using SSA (mean = 2.4, 95% confidence interval (CI): 2.1-2.7) and MEM (mean = 3.2, 95% CI: 2.3-4.2) were consistent with the theoretical subcellular-level Q(10) (approximate to 2.4). These results support the convergence in the Q(10) of R-s and imply a conserved R-s-temperature relationship. These findings indicate that the seasonality of R-s has to be eliminated from estimating the Q(10) of R-s, otherwise the estimates should be questionable. They also indicate that seasonal Q(10) and its responses to warming should not be directly used in carbon-climate models as they contain confounding effects.
关键词	ELEVATED CO2 HETEROTROPHIC RESPIRATION TERRESTRIAL ECOSYSTEMS GLOBAL CONVERGENCE CLIMATE-CHANGE CARBON DEPENDENCE PHOTOSYNTHESIS TIME DECOMPOSITION
英文关键词	Soil respiration; Singular Spectrum Analysis; Temperature sensitivity; Substrate availability; Q(10); Climate-carbon model
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:000435053800006
来源期刊	SOIL BIOLOGY & BIOCHEMISTRY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259365
推荐引用方式 GB/T 7714	Wang, Yonghui,Song, Chao,Yu, Lingfei,et al. Convergence in temperature sensitivity of soil respiration: Evidence from the Tibetan alpine grasslands[J]. 中国科学院青藏高原研究所,2018,122.
APA	Wang, Yonghui.,Song, Chao.,Yu, Lingfei.,Mi, Zhaorong.,Wang, Shiping.,...&He, Jin-Sheng.(2018).Convergence in temperature sensitivity of soil respiration: Evidence from the Tibetan alpine grasslands.SOIL BIOLOGY & BIOCHEMISTRY,122.
MLA	Wang, Yonghui,et al."Convergence in temperature sensitivity of soil respiration: Evidence from the Tibetan alpine grasslands".SOIL BIOLOGY & BIOCHEMISTRY 122(2018).