Temperature Affects New Carbon Input Utilization by Soil Microbes:Evidence based on a Rapid δ~(13)C Measurement Technology

	Temperature Affects New Carbon Input Utilization by Soil Microbes:Evidence based on a Rapid δ~(13)C Measurement Technology
	Cao Yingqiu 2; Zhang Zhen 2; Xu Li 1; Chen Zhi 1; He Nianpeng 1
刊名	Journal of Resources and Ecology
	2019
卷号	10 期号:2 页码:202
关键词	土壤呼吸有机质分解稳定同位素脉冲土壤有机质周转
ISSN号	1674-764X
英文摘要	Strong and rapid responses of soil microbial respiration to pulses,such as those from available soil organic matter (SOM) or water input from precipitation (especially in arid areas),are common.However,how soil microbes utilize new SOM inputs and the effects that temperature may have on their activities are unclear owing to the limitation in the application of traditional isotopic techniques at minute scales.In the present study,we developed a system of measuring ~(12)CO_2 and δ~(13)C minutely and synchronously under controlled incubation temperatures,i.e.,for 48 h at 7,10,15,20,and 25 °C,to explore the carbon utilization strategies of soil microbes.We measured the respiration rates of soil microbes in response to different carbon sources,i.e.,added glucose (Rg) and initial SOM (Rs),as well as the total respiration rate (Rt).All responses were rapid and characterized by unimodal curves.Furthermore,the characteristic values of these curves,such as the maximum of rate (R-max),the time required to achieve R-max,and the ratio of the duration of R-max to that of 1/2 R-max,were all dependent on incubation temperature.Interestingly,temperature greatly influenced the strategy that microorganisms employed to utilize different carbon sources.The effects of temperature on the intensity of the microbial respiratory response and the ratio of Rg/Rs are important for evaluating the effect of land-use changes or variations in seasonal temperature on SOM turnover and should be considered in ecological models in future studies.
语种	英语
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/152417]
专题	中国科学院地理科学与资源研究所
作者单位	1.Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences 2.Resources and Environment College,Anhui Agricultural University
推荐引用方式 GB/T 7714	Cao Yingqiu,Zhang Zhen,Xu Li,et al. Temperature Affects New Carbon Input Utilization by Soil Microbes:Evidence based on a Rapid δ~(13)C Measurement Technology[J]. Journal of Resources and Ecology,2019,10(2):202.
APA	Cao Yingqiu,Zhang Zhen,Xu Li,Chen Zhi,&He Nianpeng.(2019).Temperature Affects New Carbon Input Utilization by Soil Microbes:Evidence based on a Rapid δ~(13)C Measurement Technology.Journal of Resources and Ecology,10(2),202.
MLA	Cao Yingqiu,et al."Temperature Affects New Carbon Input Utilization by Soil Microbes:Evidence based on a Rapid δ~(13)C Measurement Technology".Journal of Resources and Ecology 10.2(2019):202.