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Labile, recalcitrant, microbial carbon and nitrogen and the microbial community composition at two Abies faxoniana forest elevations under elevated temperatures
Xu, Gang1,2; Chen, Juan1,4; Berninger, Frank1,3; Pumpanen, Jukka3; Bai, Jingwen1; Yu, Lei1; Duan, Baoli1
Corresponding AuthorDuan, Baoli
2015
Source PublicationSOIL BIOLOGY & BIOCHEMISTRY
ISSN0038-0717
Volume91Pages:1-13
SubtypeArticle
AbstractWe 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.
KeywordAltitude Microbial Biomass Open Top Chamber Phospholipid Fatty Acid Soil Organic Matter
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.soilbio.2015.08.016
WOS Subject ExtendedAgriculture
Indexed BySCI
WOS KeywordPHOSPHOLIPID FATTY-ACID ; SOIL ORGANIC-MATTER ; TALLGRASS PRAIRIE ; BIOMASS ; GRADIENT ; ECOSYSTEM ; RESPONSES ; PROFILES ; PATTERNS ; BOREAL
Language英语
Quartile1区
TOP
WOS SubjectSoil Science
WOS IDWOS:000364502900001
Funding OrganizationNational Natural Science Foundation of China(31170373 ; Young Talent Team Program of the Institute of Mountain Hazards and Environment(SDSQB-2012-01) ; Chinese Academy of Sciences ; 31270649)
Citation statistics
Cited Times:40[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/13838
Collection综合测试与模拟中心
山地表生过程与生态调控重点实验室
Affiliation1.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
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
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.
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