IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2015  > Vol12 No.1
Long-term responses of plant growth, soil microbial communities and soil enzyme activities to elevated CO2 and neighbouring plants
Duan, Baoli1; Zhang, Yuanbin1; Xu, Gang1,2; Chen, Juan1,5; Paquette, Alain3; Peng, Shuming1,4
Corresponding AuthorDuan, Baoli ; Zhang, Yuanbin
2015
Source PublicationAGRICULTURAL AND FOREST METEOROLOGY
ISSN0168-1923
EISSN1873-2240
Volume213Pages:91-101
SubtypeArticle
AbstractTree neighbourhoods can complicate the prediction of plant belowground responses to elevated CO2. We studied the effects of elevated CO2 on the root traits, soil microbial communities, and microbial extracellular enzyme activities in the rhizospheres of Abies faxoniana saplings grown alone or with different neighbouring species. A. faxoniana (alone), A. faxoniana grown with dwarf bamboo (Fargesia rufa), and A. faxoniana grown with biocrusts were exposed to ambient or to CO2-enriched air (ambient + 350 mu mol mol(-1)) for six years. The CO2 x neighbourhood interaction significantly affected A. faxoniana saplings growth, soil microbial communities, and soil enzyme activities. Elevated CO2 had relatively little effect on plant and microbial biomass and phospholipid fatty acid (PLFA) profiles in saplings grown alone. However, increased ectomycorrhizal colonization was observed in the roots of these saplings. Results suggested that the growth of saplings grown with biocrusts under elevated CO2 conditions was obtained by the enhanced soil microbial characteristics, whereas the positive effects of elevated CO2 on ectomycorrhizal fungi colonization in saplings grown alone could not delay or alleviate the progressive nitrogen (N) limitation as is evidenced by similar plant biomass under elevated and ambient CO2 treatments. In contrast, elevated CO2 significantly decreased the growth of A. faxoniana in the presence of dwarf bamboo, and this reduction was accompanied by decreased soil and leaf N concentrations, microbial biomass carbon (C) and N, labile C, and total PLFA. We propose that the depletion of the C pool and the reduction in the soil microbial metabolic activities in saplings grown with dwarf bamboo may limit the rates of decomposition to release nutrients from organic matter for plant growth. These results suggest that neighbouring plants have belowground feedback that potentially contributes to plant performance. On the other hand, the results of the present study also showed that the responses of soil organic C to elevated CO2 are different in the presence and absence of neighbours and dependent on neighbour identity. Only mesocosms with biocrust had a tendency to maintain more soil organic C by increased soil microbial community abundance. Our results also highlight the value of studying elevated CO2 effects on aboveground-belowground associations to improve the prediction of subalpine ecosystem functioning under climate changes. (C) 2015 Elsevier B.V. All rights reserved.
KeywordElevated Co2 Fungal Colonization Plfa Microbial Community Competition
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1016/j.agrformet.2015.06.017
WOS Subject ExtendedAgriculture ; Forestry ; Meteorology & Atmospheric Sciences
Indexed BySCI
WOS KeywordORGANIC-MATTER DECOMPOSITION ; ATMOSPHERIC CARBON-DIOXIDE ; NITROGEN LIMITATION ; ECTOMYCORRHIZAL COLONIZATION ; FOREST SOIL ; ENRICHMENT ; BIOMASS ; RHIZOSPHERE ; FUNGI ; COMPETITION
Language英语
Quartile1区
TOP
WOS SubjectAgronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS IDWOS:000361255400009
Funding OrganizationNational Natural Science Foundation of China(31270649 ; Young Talent Team Program of the Institute of Mountain Hazards and Environment(SDSQB-2012-01) ; 31170373 ; 31400333)
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/10997
CollectionJournal of Mountain Science_Journal of Mountain Science-2015_Vol12 No.1
山地表生过程与生态调控重点实验室
Affiliation1.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
2.Southwest Univ Sci & Technol, Sch Life Sci, Mianyang 621010, Peoples R China
3.Univ Quebec, Ctr Forest Res CFR, Montreal, PQ H3C 3P8, Canada
4.Chengdu Univ Technol, Coll Mat & Chem & Chem Engn, Chengdu 610059, Peoples R China
5.Mianyang Normal Univ, Ecol Secur & Protect Key Lab Sichuan Prov, 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
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GB/T 7714
Duan, Baoli,Zhang, Yuanbin,Xu, Gang,et al. Long-term responses of plant growth, soil microbial communities and soil enzyme activities to elevated CO2 and neighbouring plants[J]. AGRICULTURAL AND FOREST METEOROLOGY,2015,213:91-101.
APA Duan, Baoli,Zhang, Yuanbin,Xu, Gang,Chen, Juan,Paquette, Alain,&Peng, Shuming.(2015).Long-term responses of plant growth, soil microbial communities and soil enzyme activities to elevated CO2 and neighbouring plants.AGRICULTURAL AND FOREST METEOROLOGY,213,91-101.
MLA Duan, Baoli,et al."Long-term responses of plant growth, soil microbial communities and soil enzyme activities to elevated CO2 and neighbouring plants".AGRICULTURAL AND FOREST METEOROLOGY 213(2015):91-101.
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