DOI: 10.1111/gcb.12820
论文题名: No evidence that elevated CO<inf>2</inf> gives tropical lianas an advantage over tropical trees
作者: Marvin D.C. ; Winter K. ; Burnham R.J. ; Schnitzer S.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 5 起始页码: 2055
结束页码: 2069
语种: 英语
英文关键词: Carbon cycle
; Global change
; Mixed-effects models
; Open-top chambers
; Panama
; Seasonal drought
; Tropical forests
Scopus关键词: carbon balance
; carbon cycle
; carbon dioxide
; drought
; forest dynamics
; global change
; tree
; tropical forest
; Panama [Central America]
; carbon dioxide
; atmosphere
; biomass
; chemistry
; growth, development and aging
; metabolism
; Panama
; photosynthesis
; physiology
; plant leaf
; season
; species difference
; statistical model
; tree
; tropic climate
; Atmosphere
; Biomass
; Carbon Dioxide
; Likelihood Functions
; Panama
; Photosynthesis
; Plant Leaves
; Seasons
; Species Specificity
; Trees
; Tropical Climate
英文摘要: Recent studies indicate that lianas are increasing in size and abundance relative to trees in neotropical forests. As a result, forest dynamics and carbon balance may be altered through liana-induced suppression of tree growth and increases in tree mortality. Increasing atmospheric CO2 is hypothesized to be responsible for the increase in neotropical lianas, yet no study has directly compared the relative response of tropical lianas and trees to elevated CO2 . We explicitly tested whether tropical lianas had a larger response to elevated CO2 than co-occurring tropical trees and whether seasonal drought alters the response of either growth form. In two experiments conducted in central Panama, one spanning both wet and dry seasons and one restricted to the dry season, we grew liana (n = 12) and tree (n = 10) species in open-top growth chambers maintained at ambient or twice-ambient CO2 levels. Seedlings of eight individuals (four lianas, four trees) were grown in the ground in each chamber for at least 3 months during each season. We found that both liana and tree seedlings had a significant and positive response to elevated CO2 (in biomass, leaf area, leaf mass per area, and photosynthesis), but that the relative response to elevated CO2 for all variables was not significantly greater for lianas than trees regardless of the season. The lack of differences in the relative response between growth forms does not support the hypothesis that elevated CO2 is responsible for increasing liana size and abundance across the neotropics. © 2014 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61913
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Ecology and Evolutionary Biology, University of Michigan, 830 N. University Ave., Ann Arbor, MI, United States; Smithsonian Tropical Research Institute, Apartado 0843-03092, Balboa, Ancon, Panama; School of Freshwater Sciences, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, WI, United States; Department of Global Ecology, Carnegie Institution for Science, 260 Panama St, Stanford, CA, United States
Recommended Citation:
Marvin D.C.,Winter K.,Burnham R.J.,et al. No evidence that elevated CO<inf>2</inf> gives tropical lianas an advantage over tropical trees[J]. Global Change Biology,2015-01-01,21(5)