Microbial community responses reduce soil carbon loss in Tibetan alpine grasslands under short-term warming

NWIPB OpenIR

	Microbial community responses reduce soil carbon loss in Tibetan alpine grasslands under short-term warming
	Li, Yaoming; Lv, Wangwang; Jiang, Lili; Zhang, Lirong; Wang, Shiping; Wang, Qi; Xue, Kai; Li, Bowen; Liu, Peipei; Hong, Huan; Renzen, Wangmu; Wang, A.; Luo, Caiyun; Zhang, Zhenhua; Dorji, Tsechoe; Tas, Neslihan; Wang, Zhezhen; Zhou, Huakun; Wang, Yanfen
	2019
发表期刊	GLOBAL CHANGE BIOLOGY
卷号	25 期号:10
摘要	Changes in labile carbon (LC) pools and microbial communities are the primary factors controlling soil heterotrophic respiration (R-h) in warming experiments. Warming is expected to initially increase R-h but studies show this increase may not be continuous or sustained. Specifically, LC and soil microbiome have been shown to contribute to the effect of extended warming on R-h. However, their relative contribution is unclear and this gap in knowledge causes considerable uncertainty in the prediction of carbon cycle feedbacks to climate change. In this study, we used a two-step incubation approach to reveal the relative contribution of LC limitation and soil microbial community responses in attenuating the effect that extended warming has on R-h. Soil samples from three Tibetan ecosystems-an alpine meadow (AM), alpine steppe (AS), and desert steppe (DS)-were exposed to a temperature gradient of 5-25 degrees C. After an initial incubation period, soils were processed in one of two methods: (a) soils were sterilized then inoculated with parent soil microbes to assess the LC limitation effects, while controlling for microbial community responses; or (b) soil microbes from the incubations were used to inoculate sterilized parent soils to assess the microbial community effects, while controlling for LC limitation. We found both LC limitation and microbial community responses led to significant declines in R-h by 37% and 30%, respectively, but their relative contributions were ecosystem specific. LC limitation alone caused a greater R-h decrease for DS soils than AMs or ASs. Our study demonstrates that soil carbon loss due to R-h in Tibetan alpine soils-especially in copiotrophic soils-will be weakened by microbial community responses under short-term warming.
关键词	labile carbon limitation microbial community response soil heterotrophic respiration soil incubation soil respiration acclimation
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/59730
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Li, Yaoming,Lv, Wangwang,Jiang, Lili,et al. Microbial community responses reduce soil carbon loss in Tibetan alpine grasslands under short-term warming[J]. GLOBAL CHANGE BIOLOGY,2019,25(10).
APA	Li, Yaoming.,Lv, Wangwang.,Jiang, Lili.,Zhang, Lirong.,Wang, Shiping.,...&Wang, Yanfen.(2019).Microbial community responses reduce soil carbon loss in Tibetan alpine grasslands under short-term warming.GLOBAL CHANGE BIOLOGY,25(10).
MLA	Li, Yaoming,et al."Microbial community responses reduce soil carbon loss in Tibetan alpine grasslands under short-term warming".GLOBAL CHANGE BIOLOGY 25.10(2019).