Labile, recalcitrant, microbial carbon and nitrogen and the microbial community composition at two Abies faxoniana forest elevations under elevated temperatures

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 综合测试与模拟中心

	Labile, recalcitrant, microbial carbon and nitrogen and the microbial community composition at two Abies faxoniana forest elevations under elevated temperatures
	Xu, Gang 1,2; Chen, Juan 1,4; Berninger, Frank 1,3; Pumpanen, Jukka 3; Bai, Jingwen 1; Yu, Lei 1; Duan, Baoli1
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2015-12-01
卷号	91 页码:1-13
关键词	Altitude Microbial biomass Open top chamber Phospholipid fatty acid Soil organic matter
ISSN号	0038-0717
通讯作者	Duan, Baoli
英文摘要	We investigated the interactions of altitude and artificial warming on the soil microbial community structure in a subalpine Abies faxoniana forest in southwestern China after four years of warming. Open top chambers (OTCs) at two elevations (3000 m and 3500 m) were established, and their soil microbial characteristics, organic carbon (C) and nitrogen (N) were measured. The microbial community structure was quantified by phospholipid fatty acid (PLFA) analysis. A two-step sulfuric acid hydrolysis was used to quantify the labile and recalcitrant C fractions in the soil organic matter. The results showed that bacterial PLFAs and gram-negative bacterial PLFAs increased and the fungal PLFAs and the fungi/bacteria ratio decreased with warming at the high altitude. By contrast, the warming effects on those parameters at low altitude were small. The higher proportion of labile easily decomposable soil C may explain the different responses of the microbial community composition at the two altitudes. An RDA analysis confirmed that the variations in the soil community structure were significantly associated with soil organic matter properties such as the sizes of the soil labile N pool (LP-N), the recalcitrant N pool (RP-N), and the labile C pool as well as dissolved organic C (DOC) and dissolved organic N concentrations (DON). Our results also showed that labile C and N pools increased with the altitude, but the microbial biomass C as measured with chloroform fumigation techniques decreased. Warming increased only the recalcitrant C pools at the high altitude. Given the longer mean residence time for recalcitrant C and the much greater size of this soil organic carbon pool, the results indicated that a rise in temperature in our case increased soil C pools at higher altitudes, at least during the early stages of experimental soil warming. Warming could also cause changes in the composition of the microbial community and enzyme activities, consequently leading to functional changes in soil ecosystem processes at the high altitude. (C) 2015 Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Soil Science
研究领域[WOS]	Agriculture
关键词[WOS]	PHOSPHOLIPID FATTY-ACID ; SOIL ORGANIC-MATTER ; TALLGRASS PRAIRIE ; BIOMASS ; GRADIENT ; ECOSYSTEM ; RESPONSES ; PROFILES ; PATTERNS ; BOREAL
收录类别	SCI
语种	英语
WOS记录号	WOS:000364502900001
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/13838]
专题	综合测试与模拟中心成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China 2.Southwest Univ Sci & Technol, Sch Life Sci, Mianyang 621010, Peoples R China 3.Univ Helsinki, Dept Forest Sci, FIN-00014 Helsinki, Finland 4.Mianyang Normal Univ, Mianyang 621010, Peoples R China
推荐引用方式 GB/T 7714	Xu, Gang,Chen, Juan,Berninger, Frank,et al. Labile, recalcitrant, microbial carbon and nitrogen and the microbial community composition at two Abies faxoniana forest elevations under elevated temperatures[J]. SOIL BIOLOGY & BIOCHEMISTRY,2015,91:1-13.
APA	Xu, Gang.,Chen, Juan.,Berninger, Frank.,Pumpanen, Jukka.,Bai, Jingwen.,...&Duan, Baoli.(2015).Labile, recalcitrant, microbial carbon and nitrogen and the microbial community composition at two Abies faxoniana forest elevations under elevated temperatures.SOIL BIOLOGY & BIOCHEMISTRY,91,1-13.
MLA	Xu, Gang,et al."Labile, recalcitrant, microbial carbon and nitrogen and the microbial community composition at two Abies faxoniana forest elevations under elevated temperatures".SOIL BIOLOGY & BIOCHEMISTRY 91(2015):1-13.