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Ecophysiological responses of two dominant subalpine tree species Betula albo-sinensis and Abies faxoniana to intra-and interspecific competition under elevated temperature
Duan, Baoli1; Dong, Tingfa2,3; Zhang, Xiaolu1; Zhang, Yuanbin1; Chen, Juan2,3,4
Corresponding AuthorDuan, Baoli
2014
Source PublicationFOREST ECOLOGY AND MANAGEMENT
ISSN0378-1127
EISSN1872-7042
Volume323Pages:20-27
SubtypeArticle
AbstractSeedlings of tree species Abies faxoniana and Betula albo-sinensis were grown under different competition regimes (single plant, monoculture or mixture) at ambient temperature (AT) and elevated temperature (ET) to evaluate the impact of inter-and intraspecific competition on photosynthesis capacity, N resorption efficiency, N uptake patterns, water use efficiency (foliar carbon isotope composition, delta C-13) and root carbon reserve accumulation. Our results showed that ET did not have significant effects on relative height growth rate (RGR(H)), relative diameter growth rate (RGR(D)), chlorophyll fluorescence parameters(F-v/F-m,Phi(PSll)), light-saturated photosynthetic rate (A(1400)) and nitrogen uptake in A. faxoniana, but it significantly reduced the values of these parameters in B. albo-sinensis. On the other hand, RGR(H) of A. faxoniana was not influenced by intraspecific competition irrespective of temperature regimes, while in B. albo-sinertsis intraspecific competition was severer under AT than under ET. Decreased photosynthetic capacity and reduced plant size detected in B. albo-sinensis under ET likely contribute to its low intraspecific competitive ability. However, we found positive effects of interspecific competition on A. faxoniana but negative effects on B. albo-sinensis under ET, as A. faxoniana exposed to interspecific competition showed higher RGR(H,) RGR(D), A(1400), chlorophyll fluorescence parameters, foliar delta C-13, foliar N, and percentages of N-15-ammonium and N-15-nitrate recovery than did A. faxoniana exposed to intraspecific competition or no competition. The results indicate that A. faxoniana is a better competitor than B. albo-sinensis under ET. Further, A. faxoniana altered resource use patterns and had a high plasticity in its ammonium uptake in mixtures compared with monocultures under ET, while B. albo-sinensis did not change its N use pattern. In all, our results showed that high temperature stress tolerance (e.g., higher root carbon accumulation), high ability to keep carbon balance (e.g., higher water use efficiency, lower leaf respiration rate, higher F-v/F-m), as well as a better N acquisition ability make A. faxoniana a better competitor when compared to B. albo-sinensisg under ET. (c) 2014 Elsevier B.V. All rights reserved.
KeywordCompetition Photosynthesis Capacity Water-use Efficiency Nitrogen Uptake Temperature
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.foreco.2014.03.036
WOS Subject ExtendedForestry
Indexed BySCI
WOS KeywordCHLOROPHYLL FLUORESCENCE ; ATMOSPHERIC CO2 ; NATIVE GRASSES ; NITROGEN ; GROWTH ; SEEDLINGS ; DROUGHT ; DENSITY ; PHOTOSYNTHESIS ; PREFERENCES
Language英语
Quartile1区
TOP
WOS SubjectForestry
WOS IDWOS:000336704500003
Funding OrganizationNational Natural Science Foundation of China(31170373 ; Young Talent Team Program of the Institute of Mountain Hazards and Environment, CAS(SDSQB-2012-01) ; 31270649)
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/9949
Collection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.Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
4.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
Recommended Citation
GB/T 7714
Duan, Baoli,Dong, Tingfa,Zhang, Xiaolu,et al. Ecophysiological responses of two dominant subalpine tree species Betula albo-sinensis and Abies faxoniana to intra-and interspecific competition under elevated temperature[J]. FOREST ECOLOGY AND MANAGEMENT,2014,323:20-27.
APA Duan, Baoli,Dong, Tingfa,Zhang, Xiaolu,Zhang, Yuanbin,&Chen, Juan.(2014).Ecophysiological responses of two dominant subalpine tree species Betula albo-sinensis and Abies faxoniana to intra-and interspecific competition under elevated temperature.FOREST ECOLOGY AND MANAGEMENT,323,20-27.
MLA Duan, Baoli,et al."Ecophysiological responses of two dominant subalpine tree species Betula albo-sinensis and Abies faxoniana to intra-and interspecific competition under elevated temperature".FOREST ECOLOGY AND MANAGEMENT 323(2014):20-27.
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