Volume 130, Issue 7 p. 1193-1208
Research

Resolving whole-plant economics from leaf, stem and root traits of 1467 Amazonian tree species

Jason Vleminckx

Corresponding Author

Jason Vleminckx

Dept of Biological Sciences, Florida International Univ., FL, USA

Yale Inst. for Biospheric Studies, New Haven, CT, USA

Contribution: Conceptualization (lead), Formal analysis (lead), Funding acquisition (supporting), ​Investigation (lead), Methodology (lead), Project administration (supporting), Resources (supporting), Software (lead), Supervision (supporting), Validation (equal), Visualization (lead), Writing - original draft (lead), Writing - review & editing (lead)

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Claire Fortunel

Claire Fortunel

AMAP (botAnique et Modélisation de l'Architecture des Plantes et des Végétations), Univ. de Montpellier, CIRAD, CNRS, INRAE, IRD, Montpellier Cedex 5, France

Contribution: Conceptualization (equal), Data curation (lead), Formal analysis (supporting), Funding acquisition (supporting), ​Investigation (equal), Methodology (supporting), Project administration (supporting), Resources (lead), Supervision (supporting), Validation (equal), Visualization (equal), Writing - original draft (equal), Writing - review & editing (equal)

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Oscar Valverde-Barrantes

Oscar Valverde-Barrantes

Dept of Biological Sciences, Florida International Univ., FL, USA

Contribution: Conceptualization (equal), Data curation (lead), Formal analysis (supporting), Funding acquisition (supporting), ​Investigation (equal), Methodology (supporting), Project administration (supporting), Resources (lead), Supervision (supporting), Validation (equal), Visualization (equal), Writing - original draft (equal), Writing - review & editing (equal)

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C. E. Timothy Paine

C. E. Timothy Paine

Environmental and Rural Science, Univ. of New England, Armidale, New South Wales, Australia

Contribution: Conceptualization (equal), Data curation (supporting), Funding acquisition (supporting), ​Investigation (supporting), Methodology (supporting), Project administration (supporting), Resources (equal), Validation (equal), Visualization (supporting), Writing - original draft (supporting), Writing - review & editing (supporting)

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Julien Engel

Julien Engel

AMAP (botAnique et Modélisation de l'Architecture des Plantes et des Végétations), Univ. de Montpellier, CIRAD, CNRS, INRAE, IRD, Montpellier Cedex 5, France

International Center for Tropical Botany, Dept of Biological Sciences, Florida International Univ., Miami, FL, USA

Contribution: Data curation (lead), Funding acquisition (supporting), ​Investigation (supporting), Project administration (supporting), Resources (equal), Validation (supporting)

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Pascal Petronelli

Pascal Petronelli

CIRAD, UMR Ecologie des Forêts de Guyane, AgroParisTech, Univ. de Guyane, Univ. des Antilles, Kourou Cedex, France

Contribution: Data curation (equal), Resources (equal)

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Aurélie K. Dourdain

Aurélie K. Dourdain

CIRAD, UMR Ecologie des Forêts de Guyane, AgroParisTech, Univ. de Guyane, Univ. des Antilles, Kourou Cedex, France

Contribution: Data curation (equal), ​Investigation (supporting), Resources (supporting), Visualization (supporting)

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Juan Guevara

Juan Guevara

Field Mueum of Natural History, Chicago, IL, USA

Grupo de Investigación en Biodiversidad, Medio Ambiente y Salud-BIOMAS- Univ. de las Américas, Campus Queri, Quito Ecuador

Contribution: Data curation (supporting), ​Investigation (supporting), Resources (supporting)

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Solène Béroujon

Solène Béroujon

UMR Ecologie des Forêts de Guyane, AgroParisTech, Univ. de Guyane, Univ. des Antilles, Kourou Cedex, France

Contribution: ​Investigation (supporting), Resources (supporting), Writing - original draft (supporting), Writing - review & editing (supporting)

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Christopher Baraloto

Christopher Baraloto

Dept of Biological Sciences, Florida International Univ., FL, USA

INRAe, UMR Ecologie de Forêts de Guyane, AgroParisTech, CIRAD, INRA, Univ. de Guyane, Univ. des Antilles, Kourou Cedex, France

Contribution: Conceptualization (lead), Data curation (lead), Formal analysis (supporting), Funding acquisition (lead), ​Investigation (equal), Methodology (equal), Project administration (lead), Resources (lead), Software (supporting), Supervision (lead), Validation (equal), Visualization (equal), Writing - original draft (equal), Writing - review & editing (equal)

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First published: 12 May 2021
Citations: 22

Abstract

It remains unclear how evolutionary and ecological processes have shaped the wide variety of plant life strategies, especially in highly diverse ecosystems like tropical forests. Some evidence suggests that species have diversified across a gradient of ecological strategies, with different plant tissues converging to optimize resource use across environmental gradients. Alternative hypotheses propose that species have diversified following independent selection on different tissues, resulting in a decoupling of trait syndromes across organs. To shed light on the subject, we assembled an unprecedented dataset combining 19 leaf, stem and root traits for 1467 tropical tree species inventoried across 71 0.1-ha plots spanning broad environmental gradients in French Guiana. Nearly 50% of the overall functional heterogeneity was expressed along four orthogonal dimensions, after accounting for phylogenetic dependences among species. The first dimension related to fine root functioning, while the second and third dimensions depicted two decoupled leaf economics spectra, and the fourth dimension encompassed a wood economics spectrum. Traits involved in orthogonal functional strategies, five leaf traits in particular but also trunk bark thickness, were consistently associated with a same gradient of soil texture and nutrient availability. Root traits did not show any significant association with edaphic variation, possibly because of the prevailing influence of other factors (mycorrhizal symbiosis, phylogenetic constraints). Our study emphasises the existence of multiple functional dimensions that allow tropical tree species to optimize their performance in a given environment, bringing new insights into the debate around the presence of a whole plant economic spectrum in tropical forest tree communities. It also emphasizes the key role that soil heterogeneity plays in shaping tree species assembly. The extent to which different organs are decoupled and respond to environmental gradients may also help to improve our predictions of species distribution changes in responses to habitat modification and environmental changes.

Data availability statement

The data supporting the results are available at Dryad Digital Repository: <http://dx.doi.org/10.5061/dryad.c59zw3r76> (Vleminckx et al. 2021).