Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Meta-analysis of the interaction between shade-tolerance, light environment and growth response of woody species to elevated CO2
AU - Kerstiens, Gerhard
PY - 2001
Y1 - 2001
N2 - Growth responses of different tree species to elevated CO2 vary enormously, even when grown under the same basic experimental conditions (such as nutrient supply and light conditions). A test of the hypothesis that this variation is associated with the species' shade-tolerance is presented. A meta-analysis of 74 logarithm-transformed response ratios RR (total biomass in -700 mu mol.mol(-1) CO2/biomass in current ambient CO2), grouped according to the species' relative tolerance to shade, revealed that RR differed widely and significantly between seedlings or saplings of woody species of different shade-tolerance. Only comparative studies were included in the meta-analysis, and interference from differences in basic experimental conditions between experiments was minimised. The mean RR of species with very high shade-tolerance was 1.51. This was significantly greater than the value of 1.18 for species intolerant of shade. Smaller differences in mean RR were found between groups of species that differed less widely in shade-tolerance. When responses were categorised according to two aspects of light environment in the experiments, daily integrated or peak photosynthetically active photon flux density (PFD), the differences in RR between different shade-tolerance classes disappeared at daily integrated PFD below similar to 20 mol.m(-2).ad(-1) or peak PFD below similar to 250 mu mol.m(-2).s(-1). Growth stimulation in juvenile trees is likely to cause increased survivorship in subsequent years. Even if the observed differences in RR were restricted to sites experiencing no or only moderate shading, it appears likely that they will affect species composition of naturally regenerating forests in the long term. (C) 2001 Editions scientifiques et medicales Elsevier SAS.
AB - Growth responses of different tree species to elevated CO2 vary enormously, even when grown under the same basic experimental conditions (such as nutrient supply and light conditions). A test of the hypothesis that this variation is associated with the species' shade-tolerance is presented. A meta-analysis of 74 logarithm-transformed response ratios RR (total biomass in -700 mu mol.mol(-1) CO2/biomass in current ambient CO2), grouped according to the species' relative tolerance to shade, revealed that RR differed widely and significantly between seedlings or saplings of woody species of different shade-tolerance. Only comparative studies were included in the meta-analysis, and interference from differences in basic experimental conditions between experiments was minimised. The mean RR of species with very high shade-tolerance was 1.51. This was significantly greater than the value of 1.18 for species intolerant of shade. Smaller differences in mean RR were found between groups of species that differed less widely in shade-tolerance. When responses were categorised according to two aspects of light environment in the experiments, daily integrated or peak photosynthetically active photon flux density (PFD), the differences in RR between different shade-tolerance classes disappeared at daily integrated PFD below similar to 20 mol.m(-2).ad(-1) or peak PFD below similar to 250 mu mol.m(-2).s(-1). Growth stimulation in juvenile trees is likely to cause increased survivorship in subsequent years. Even if the observed differences in RR were restricted to sites experiencing no or only moderate shading, it appears likely that they will affect species composition of naturally regenerating forests in the long term. (C) 2001 Editions scientifiques et medicales Elsevier SAS.
KW - biomass
KW - carbon dioxide
KW - forest
KW - forest gap
KW - meta-analysis
KW - succession
KW - shade-tolerance
KW - trees
KW - CARBON-DIOXIDE
KW - BIOMASS ALLOCATION
KW - ATMOSPHERIC CO2
KW - FOREST MODEL
KW - SEEDLINGS
KW - TREES
KW - PHYSIOLOGY
KW - ENRICHMENT
KW - PLANTS
KW - PHOTOSYNTHESIS
U2 - 10.1016/S1146-609X(00)01096-1
DO - 10.1016/S1146-609X(00)01096-1
M3 - Journal article
VL - 22
SP - 61
EP - 69
JO - Acta Oecologica
JF - Acta Oecologica
SN - 1146-609X
IS - 1
ER -