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Title

Tropical forest responses to increasing atmospheric CO2: current knowledge and opportunities for future research

Publication Year

2013

Author(s)
  • Cernusak, Lucas A.
  • Winter, Klaus
  • Dalling, James W.
  • Holtum, Joseph A. M.
  • Jaramillo, Carlos
  • Koerner, Christian
  • Leakey, Andrew D. B.
  • Norby, Richard J.
  • Poulter, Benjamin
  • Turner, Benjamin L.
  • Wright, S. Joseph
Source
FUNCTIONAL PLANT BIOLOGY Volume: 40 Issue: 6 Pages: 531-551 Published: 2013
ISSN
1445-4408
Abstract

Elevated atmospheric CO2 concentrations (ca) will undoubtedly affect the metabolism of tropical forests worldwide; however, critical aspects of how tropical forests will respond remain largely unknown. Here, we review the current state of knowledge about physiological and ecological responses, with the aim of providing a framework that can help to guide future experimental research. Modelling studies have indicated that elevated ca can potentially stimulate photosynthesis more in the tropics than at higher latitudes, because suppression of photorespiration by elevated ca increases with temperature. However, canopy leaves in tropical forests could also potentially reach a high temperature threshold under elevated ca that will moderate the rise in photosynthesis. Belowground responses, including fine root production, nutrient foraging and soil organic matter processing, will be especially important to the integrated ecosystem response to elevated ca. Water use efficiency will increase as ca rises, potentially impacting upon soil moisture status and nutrient availability. Recruitment may be differentially altered for some functional groups, potentially decreasing ecosystem carbon storage. Whole-forest CO2 enrichment experiments are urgently needed to test predictions of tropical forest functioning under elevated ca. Smaller scale experiments in the understorey and in gaps would also be informative, and could provide stepping stones towards stand-scale manipulations.

Author Keyword(s)
  • carbon storage
  • CO2 enrichment
  • liana
  • phosphorus
  • succession
  • water use efficiency
KeyWord(s) Plus
  • WATER-USE EFFICIENCY
  • ELEVATED CARBON-DIOXIDE
  • AMAZON RAIN-FOREST
  • SOIL ORGANIC PHOSPHORUS
  • GLOBAL VEGETATION MODEL
  • BARRO-COLORADO ISLAND
  • BASIN-WIDE VARIATIONS
  • FICUS-INSIPIDA WILLD
  • STOMATAL CONDUCTANCE
  • LONG-TERM
ESI Discipline(s)
  • Plant & Animal Science
Web of Science Category(ies)
  • Plant Sciences
Adress(es)

[Cernusak, Lucas A.] James Cook Univ, Sch Marine & Trop Biol, Cairns, Qld 4878, Australia; [Winter, Klaus; Holtum, Joseph A. M.; Jaramillo, Carlos; Turner, Benjamin L.] Smithsonian Trop Res Inst, Balboa, Ancon, Panama; [Dalling, James W.; Leakey, Andrew D. B.] Univ Illinois, Dept Plant Biol, Urbana, IL 61801 USA; [Holtum, Joseph A. M.] James Cook Univ, Sch Marine & Trop Biol, Townsville, Qld 4811, Australia; [Koerner, Christian] Univ Basel, Inst Bot, CH-4056 Basel, Switzerland; [Norby, Richard J.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA; [Norby, Richard J.] Oak Ridge Natl Lab, Climate Change Sci Inst, Oak Ridge, TN 37831 USA; [Poulter, Benjamin] Univ Versailles St Quentin, F-91191 Versailles, France

Reprint Adress

Cernusak, LA (reprint author), James Cook Univ, Sch Marine & Trop Biol, Cairns, Qld 4878, Australia.

Country(ies)
  • Australia
  • France
  • Panama
  • Switzerland
  • United States
CNRS - Adress(es)
    Accession Number
    WOS:000320271400001
    uid:/097RB4Q6
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