Long-term responses of plant growth, soil microbial communities and soil enzyme activities to elevated CO2 and neighbouring plants
文献类型:期刊论文
作者 | Duan, Baoli1; Zhang, Yuanbin1; Xu, Gang1,2; Chen, Juan1,5; Paquette, Alain3; Peng, Shuming1,4 |
刊名 | AGRICULTURAL AND FOREST METEOROLOGY |
出版日期 | 2015-11-15 |
卷号 | 213页码:91-101 |
ISSN号 | 0168-1923 |
关键词 | Elevated CO2 Fungal colonization PLFA Microbial community Competition |
通讯作者 | Duan, Baoli ; Zhang, Yuanbin |
英文摘要 | Tree 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. |
WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
类目[WOS] | Agronomy ; Forestry ; Meteorology & Atmospheric Sciences |
研究领域[WOS] | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
关键词[WOS] | ORGANIC-MATTER DECOMPOSITION ; ATMOSPHERIC CARBON-DIOXIDE ; NITROGEN LIMITATION ; ECTOMYCORRHIZAL COLONIZATION ; FOREST SOIL ; ENRICHMENT ; BIOMASS ; RHIZOSPHERE ; FUNGI ; COMPETITION |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000361255400009 |
源URL | [http://ir.imde.ac.cn/handle/131551/10997] |
专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2015_Vol12 No.1 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, 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 |
推荐引用方式 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. |
入库方式: OAI收割
来源:成都山地灾害与环境研究所
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