DOI: 10.1111/gcb.12039
论文题名: Tree species diversity interacts with elevated CO2 to induce a greater root system response
作者: Smith A.R. ; Lukac M. ; Bambrick M. ; Miglietta F. ; Godbold D.L.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 1 起始页码: 217
结束页码: 228
语种: 英语
英文关键词: Fine roots
; Free-air CO2 enrichment
; Mixture
; Monoculture
; Polyculture
; Temperate forest
Scopus关键词: carbon dioxide
; belowground biomass
; biogeochemical cycle
; biomass burning
; carbon dioxide
; ecosystem response
; forest ecosystem
; global change
; growth
; land use change
; monoculture
; morphology
; polyculture
; root system
; species diversity
; species occurrence
; temperate forest
; tree
; article
; biomass
; growth, development and aging
; physiology
; plant root
; species difference
; tree
; Biomass
; Carbon Dioxide
; Plant Roots
; Species Specificity
; Trees
; Alnus glutinosa
; Betula pendula
; Fagus sylvatica
英文摘要: As a consequence of land-use change and the burning of fossil fuels, atmospheric concentrations of CO2 are increasing and altering the dynamics of the carbon cycle in forest ecosystems. In a number of studies using single tree species, fine root biomass has been shown to be strongly increased by elevated CO2. However, natural forests are often intimate mixtures of a number of co-occurring species. To investigate the interaction between tree mixture and elevated CO2, Alnus glutinosa, Betula pendula and Fagus sylvatica were planted in areas of single species and a three species polyculture in a free-air CO2 enrichment study (BangorFACE). The trees were exposed to ambient or elevated CO2 (580 μmol mol-1) for 4 years. Fine and coarse root biomass, together with fine root turnover and fine root morphological characteristics were measured. Fine root biomass and morphology responded differentially to the elevated CO2 at different soil depths in the three species when grown in monocultures. In polyculture, a greater response to elevated CO2 was observed in coarse roots to a depth of 20 cm, and fine root area index to a depth of 30 cm. Total fine root biomass was positively affected by elevated CO2 at the end of the experiment, but not by species diversity. Our data suggest that existing biogeochemical cycling models parameterized with data from species grown in monoculture may be underestimating the belowground response to global change. © 2012 Blackwell Publishing Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62579
Appears in Collections: 影响、适应和脆弱性
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作者单位: School of the Environment Natural Resources and Geography, Bangor University, Bangor, Gwynedd LL57 2UW, United Kingdom; School of Agriculture, Policy and Development, University of Reading, Reading, Berkshire, RG6 6AR, United Kingdom; Centre for Ecology and Hydrology, Environment Centre Wales, Bangor, Gwynedd, LL57 2UW, United Kingdom; Institute of Biometeorology, National Research Council (IBIMET-CNR), Via Caproni 8, Firenze, 50145, Italy; FoxLab., Fondazione E. Mach, Via Mach 1, San Michele a/Adige (TN), 38010, Italy; Institute of Forest Ecology, Universität für Bodenkultur (BOKU), Vienna, 1190, Austria
Recommended Citation:
Smith A.R.,Lukac M.,Bambrick M.,et al. Tree species diversity interacts with elevated CO2 to induce a greater root system response[J]. Global Change Biology,2013-01-01,19(1)