Changes in soil heterotrophic respiration, carbon availability, and microbial function in seven forests along a climate gradient
Fang, HJ; Cheng, SL; Wang, YS; Yu, GR; Xu, MJ; Dang, XS; Li, LS; Wang, L
2014
Source PublicationECOLOGICAL RESEARCH
ISSN0912-3814
Volume29Issue:6Pages:1077-1086
AbstractSoil microbial communities play an essential role in soil carbon (C) emission and C sequestration in forest ecosystems. However, little information is available regarding the relationship between soil C dynamics and microbial substrate utilization at large scales. Along the North-South Transect of Eastern China (NSTEC), seven forests representative of boreal, temperate and tropical biomes were examined. Soil heterotrophic respiration (R-h), soil dissolved organic C (DOC), microbial biomass C (MBC), and microbial community-level physiological profiles (CLPPs) were investigated using biochemical measurements, static chamber-gas chromatography analysis, and Biolog-Eco microplates, respectively. We found that soil R-h rates were significantly higher in subtropical and boreal forests than in temperate forests. Conversely, the concentrations of soil DOC and MBC, as well as microbial metabolic activity and functional diversity, were consistently higher in temperate forests than in subtropical forests. There were considerably different substrate utilization profiles among the boreal, temperate, and subtropical forests. Soil microorganisms from the temperate and boreal forests mainly metabolized high-energy substrates, while those from the subtropical forests used all substrates equally. In addition, soil R-h rates were significantly and negatively related to soil labile C concentrations, total metabolic activity, and the intensity of individual substrate utilization, indicating that soil microbes assimilated more soil substrates, thereby reducing CO2 emissions. Overall, our study suggests that climate factors, as well as substrate availability, dominate the activities and functions of soil microbes at large scales.
SubtypeJournal
KeywordSoil heterotrophic respiration Labile carbon concentration Microbial substrate utilization Functional diversity Forest biomes
Subject AreaEnvironmental Sciences & Ecology
WOS Subject ExtendedEcology
WOS KeywordDISSOLVED ORGANIC-CARBON ; COMMUNITY COMPOSITION ; TERRESTRIAL ECOSYSTEMS ; BACTERIAL COMMUNITIES ; ENZYME-ACTIVITIES ; PINUS-SYLVESTRIS ; BETULA-PENDULA ; PICEA-ABIES ; DIVERSITY ; BIOMASS
Indexed BySCI
Language英语
WOS IDWOS:000345033000006
PublisherSPRINGER JAPAN KK
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44493
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Fang, HJ,Cheng, SL,Wang, YS,et al. Changes in soil heterotrophic respiration, carbon availability, and microbial function in seven forests along a climate gradient[J]. ECOLOGICAL RESEARCH,2014,29(6):1077-1086.
APA Fang, HJ.,Cheng, SL.,Wang, YS.,Yu, GR.,Xu, MJ.,...&Wang, L.(2014).Changes in soil heterotrophic respiration, carbon availability, and microbial function in seven forests along a climate gradient.ECOLOGICAL RESEARCH,29(6),1077-1086.
MLA Fang, HJ,et al."Changes in soil heterotrophic respiration, carbon availability, and microbial function in seven forests along a climate gradient".ECOLOGICAL RESEARCH 29.6(2014):1077-1086.
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