Whole-soil-profile warming does not change microbial carbon use efficiency in surface and deep soils

	Whole-soil-profile warming does not change microbial carbon use efficiency in surface and deep soils
	Zhang, Qiufang; Qin, Wenkuan; Feng, Jiguang; Li, Xiaojie; Zhang, Zhenhua; He, Jin-Sheng; Schimel, Joshua P.; Zhu, Biao
刊名	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
	2023
卷号	120 期号:32
英文摘要	The paucity of investigations of carbon (C) dynamics through the soil profile with warming makes it challenging to evaluate the terrestrial C feedback to climate change. Soil microbes are important engines driving terrestrial biogeochemical cycles; their carbon use efficiency (CUE), defined as the proportion of metabolized organic C allocated to microbial biomass, is a key regulator controlling the fate of soil C. It has been theorized that microbial CUE should decline with warming; however, empirical evidence for this response is scarce, and data from deeper soils are particularly scarce. Here, based on soil samples from a whole-soil-profile warming experiment (0 to 1 m, +4 degrees C) and O-18 tracing approach, we examined the vertical variation of microbial CUE and its response to similar to 3.3-y experimental warming in an alpine grassland on the Qinghai-Tibetan Plateau. Microbial CUE decreased with soil depth, a trend that was primarily controlled by soil C availability. However, warming had limited effects on microbial CUE regardless of soil depth. Similarly, warming had no significant effect on soil C availability, as char-acterized by extractable organic C, enzyme -based lignocellulose index, and lignin phenol-based ratios of vanillyls, syringyls, and cinnamyls. Collectively, our work suggests that short -term warming does not alter microbial CUE in either surface or deep soils, and emphasizes the regulatory role of soil C availability on microbial CUE.
内容类型	期刊论文
源URL	[http://210.75.249.4/handle/363003/61594]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Zhang, Qiufang,Qin, Wenkuan,Feng, Jiguang,et al. Whole-soil-profile warming does not change microbial carbon use efficiency in surface and deep soils[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2023,120(32).
APA	Zhang, Qiufang.,Qin, Wenkuan.,Feng, Jiguang.,Li, Xiaojie.,Zhang, Zhenhua.,...&Zhu, Biao.(2023).Whole-soil-profile warming does not change microbial carbon use efficiency in surface and deep soils.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,120(32).
MLA	Zhang, Qiufang,et al."Whole-soil-profile warming does not change microbial carbon use efficiency in surface and deep soils".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 120.32(2023).