Article (Scientific journals)
A whole-plant functional scheme predicting the early growth of tropical tree species: evidence from 15 tree species in Central Africa
Mirabel, A.; Ouédraogo, D.-Y.; Beeckman, H. et al.
2018In Trees : Structure and Function
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Keywords :
Functional trade-offs; Integrated functional type; Ontogeny; Performance; Seedlings; Wood anatomy; Bayesian networks; Biomass; Commerce; Economic and social effects; Forestry; Hydraulics; Multivariant analysis; Natural resources management; Seed; Tropics; Functional types; Plant economics; Trade off; Ecology
Abstract :
[en] Key message: This study highlighted the consistency of a functional scheme integrating leaf, stem and root traits, biomass allocation and stem anatomy for 15 tropical tree species at the seedling stage. This functional scheme was shaped by the trade-offs for resource use and the hydraulics of the plants and was found to determine seedling growth. Abstract: Functional traits determine plant functioning, performance and response to the environment and define species functional strategy. The functional strategy of 15 African tree species was assessed by (1) highlighting the structure of traits covariance and the underlying functional trade-offs, (2) inferring a whole-plant functional scheme and (3) testing the correlation of the functional scheme with plant performance for two early developmental stages (seedlings and saplings). We selected 10 seedlings for each of the 15 species studied from a nursery in south-eastern Cameroon and measured 18 functional traits, including leaf, stem and root traits, biomass allocation and stem anatomy. We assessed the height and diameter growth of the seedlings and the DBH growth and survival for the saplings of nearby plantations. Multivariate analyses highlighted the covariations among the functional traits of the leaf/stem/root, biomass allocation ratios and stem anatomy. The major trait covariation axes were driven by two trade-offs, first between resource acquisition and conservation and second between hydraulic safety and efficiency. The axes were integrated into a Bayesian network inferring a functional scheme at the whole-plant scale, which was found to predict the growth of the seedlings but not the performance of the saplings. The functional strategies of the seedlings were determined by an integrated whole-plant scheme reflecting the trade-offs for resource use and plant hydraulics. The scheme predicted the growth of the seedlings through mechanistic pathways from the wood stem to all the plant traits, but it appeared to shift at the stage of the saplings. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Mirabel, A.;  TERRA Teaching and Research Center, Gembloux Agro-Bio Tech, Passage des Déportés 2, Gembloux, 5030, Belgium, Cirad, UR Forest and Societies, Montpellier, France
Ouédraogo, D.-Y.;  TERRA Teaching and Research Center, Gembloux Agro-Bio Tech, Passage des Déportés 2, Gembloux, 5030, Belgium
Beeckman, H.;  Service of Wood Biology, Royal Museum of Central Africa (RMCA), Tervuren, Belgium
Delvaux, Cédric  ;  Université de Liège - ULiège > Département de chimie (sciences) > Laboratoire de spectrométrie de masse (L.S.M.)
Doucet, Jean-Louis  ;  Université de Liège - ULiège > Ingénierie des biosystèmes (Biose) > Laboratoire de Foresterie des régions trop. et subtropicales
Hérault, B.;  Cirad, UR Forest and Societies, Montpellier, France, INPHB (Institut National Polytechnique Félix Houphouët Boigny), Yamoussoukro, Cote d'Ivoire
Fayolle, Adeline  ;  Université de Liège - ULiège > Ingénierie des biosystèmes (Biose) > Gestion des ressources forestières et des milieux naturels
Language :
English
Title :
A whole-plant functional scheme predicting the early growth of tropical tree species: evidence from 15 tree species in Central Africa
Publication date :
2018
Journal title :
Trees : Structure and Function
ISSN :
0931-1890
eISSN :
1432-2285
Publisher :
Springer Verlag
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 07 July 2019

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