气候变化领域集成服务门户(CCPortal): Decoupling of soil carbon mineralization and microbial community composition across a climate gradient on the Tibetan Plateau

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DOI	10.1016/j.geoderma.2023.116736
	Decoupling of soil carbon mineralization and microbial community composition across a climate gradient on the Tibetan Plateau
	Zheng, Jinyang; Mao, Xiali; van Groenigen, Kees Jan; Zhang, Shuai; Wang, Mingming; Guo, Xiaowei; Yu, Wu; Luo, Lun; Chang, Jinfeng; Shi, Zhou; Luo, Zhongkui
发表日期	2024
ISSN	0016-7061
EISSN	1872-6259
卷号	441
英文摘要	Soil microbes drive soil organic carbon (SOC) mineralization. Because microbial groups differ in metabolic efficiency and respond differently to temperature variation, it is reasonable to expect a close association of SOC mineralization and its temperature sensitivity (Q(10) which is defined as the factor of the change of soil carbon mineralization induced by 10 degrees C temperature increase) with microbial community diversity and composition. However, these relations have rarely been tested. Here, we conducted an incubation experiment to assess the temperature responses of microbial alpha diversity and the relative abundance of microbial r- and K-strategists in soils from a wide range of ecosystems across a climate gradient in the southeast Tibet. The results indicated that the instantaneous alpha diversity and the relative abundance of r- and K-strategists are significantly (P < 0.05) influenced by temperature, but these microbial variables are poor predictors of SOC mineralization measured at the same time. Rather, microbial community diversity and the relative abundance of r- and K-strategists of fresh soils showed consistent and significant (P < 0.05) effects on both SOC mineralization and Q(10) at different incubation stages. Importantly, path analysis indicated that microbial alpha diversity and r- and K-strategists exerts no independent effects on SOC mineralization and Q(10) when variation in climate, SOC chemistry, physical protection, and edaphic properties are accounted for. Together, our results suggest that while soil microbial community diversity and composition are a strong proxy of SOC quality and availability, they are not a fundamental determinant of SOC mineralization and Q(10).
关键词	Bacteria Carbon fractions Fungi Microbial diversity r/K strategists Soil organic carbon Temperature sensitivity (Q (10) )Soil profile
英文关键词	TEMPERATURE SENSITIVITY; ORGANIC-MATTER; RESPIRATION; SUBSTRATE; BIOMASS; DECOMPOSITION; FRACTIONS; KNOWLEDGE; DYNAMICS; SYSTEM
WOS研究方向	Soil Science
WOS记录号	WOS:001138828700001
来源期刊	GEODERMA
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283626
作者单位	Zhejiang University; University of Exeter; Tibet Agriculture & Animal Husbandry University; Zhejiang University; Zhejiang University
推荐引用方式 GB/T 7714	Zheng, Jinyang,Mao, Xiali,van Groenigen, Kees Jan,et al. Decoupling of soil carbon mineralization and microbial community composition across a climate gradient on the Tibetan Plateau[J],2024,441.
APA	Zheng, Jinyang.,Mao, Xiali.,van Groenigen, Kees Jan.,Zhang, Shuai.,Wang, Mingming.,...&Luo, Zhongkui.(2024).Decoupling of soil carbon mineralization and microbial community composition across a climate gradient on the Tibetan Plateau.GEODERMA,441.
MLA	Zheng, Jinyang,et al."Decoupling of soil carbon mineralization and microbial community composition across a climate gradient on the Tibetan Plateau".GEODERMA 441(2024).