Apports d'un modèle démographique plurispécifique pour l'étude des relations diversité / dynamique en forêt tropicale guyanaise

Favrichon, Vincent

doi:10.1051/forest:19980602

Cited by 10 publications

(7 citation statements)

References 2 publications

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“…Our study showed that the five species group classification of Favrichon (1998) was predictive of the fate of two pooled groups after disturbance, but did not help to predict species fate in undisturbed plots. The two pooled groups were: the heliophilous species (H + P) and the mid to strongly shade-tolerant species (ST + T + MT).…”

Section: Practical Consequences For Modellers and Managerscontrasting

confidence: 64%

“…The 53 species were distributed between five functional groups produced from a clustering analysis of size and dynamic variables regarding 123 species, including our set of species (Favrichon 1994(Favrichon , 1998 Table 2). Although they were objective data driven groups, they showed relevant differences in life history traits such as dispersal mode, seed size and wood density (Favrichon 1994).…”

Section: Studied Species and Functional Classificationmentioning

confidence: 99%

“…Such classifications should help to predict dynamic processes and ultimately species fate after disturbance. Forest dynamics modellers usually test this indirectly by comparing the relative importance of functional groups at equilibrium in the modelled forest and in the field (Favrichon 1998;Köhler & Huth 1998;Sist et al 2003). In a few studies (Phillips et al 2002, among others) direct comparisons were made between predicted and observed dynamic processes and species fate after disturbance across different functional groups.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we questioned how well a functional classification can predict species fate after disturbance. The studied classification had been developed from short-term data after experimental logging disturbance in French Guiana (Favrichon 1994(Favrichon , 1998. We compared this classification to variables quantifying species fate and dynamic processes on a longer term after disturbance (15 years) and on larger populations.…”

Section: Introductionmentioning

confidence: 99%

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Can functional classification of tropical trees predict population dynamics after disturbance?

Delcamp

Gourlet‐Fleury

Flores

et al. 2008

J Vegetation Science

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Question: How far can we simplify the fioristic complexity of a tropical rainforest into functional groups in order to predict tree population dynamics after logging‐induced disturbance? Location: Paracou experimental site, French Guiana. Methods: We used data from over 15 years in control and disturbed plots from a silvicultural trial started in 1984. We selected 53 common tree species assigned to five functional groups based on potential size and light requirement. For each species, we quantified: the fate, i.e. variation in population size, and dynamic processes, i.e. mortality, recruitment and growth, driving this fate. We investigated the links between dynamic processes, fate and functional groups. Results: Disturbance stimulated growth and recruitment for most species, but had a heterogeneous impact on mortality. Species fate in disturbed plots depended on recruitment and was more favourable than in control plots. The functional classification was more predictive for most separate dynamic processes than for species fate: after disturbance, significant differences were found between all functional groups for growth. Pioneer+heliophilous species showed significantly higher recruitment rates. Mortality of shade‐tolerant species slightly increased and of mid‐tolerant and heliophilous species decreased. Conclusions: A combination of three species classifications separately built from the growth, recruitment and mortality processes is more informative than a global classification combining the processes. Identifying the pioneer+heliophilous species on the basis of their growth rate is crucial to predict species fate after disturbance. We showed that potential growth rate could be used as a reliable indicator to identify this group.

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Section: Practical Consequences For Modellers and Managerscontrasting

confidence: 64%

Section: Studied Species and Functional Classificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Can functional classification of tropical trees predict population dynamics after disturbance?

Delcamp

Gourlet‐Fleury

Flores

et al. 2008

J Vegetation Science

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“…A continuum of trait values, rather than distinct classes, is usually found and the chance to find a single clustering of species based on several ecological traits is small. However, classifications combining at least two ecological axes have been proposed [22,24,39,55]. These axes can be characterised by the dynamic of the forest * Corresponding author: damien.bonal@kourou.cirad.fr (tree growth, mortality and recruitment) and the morphology of trees (height and maximal diameter of the trees) and are pertinent to understand ecosystem processes [38].…”

Section: Introductionmentioning

confidence: 99%

The successional status of tropical rainforest tree species is associated with differences in leaf carbon isotope discrimination and functional traits

et al. 2007

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-We characterised the among species variability in leaf gas exchange and morphological traits under controlled conditions of seedlings of 22 tropical rainforest canopy species to understand the origin of the variability in leaf carbon isotope discrimination (∆) among species with different growth and dynamic characteristics (successional gradient). Our results first suggest that these species pursue a consistent strategy in terms of ∆ throughout their ontogeny (juveniles grown here versus canopy adult trees from the natural forest). Second, leaf ∆ was negatively correlated with WUE and N, and positively correlated with g s , but among species differences in ∆ were mainly explained by differences in WUE. Finally, species belonging to different successional groups display distinct leaf functional and morphological traits. We confirmed that fast growing early successional species maximise carbon assimilation with high stomatal conductance. In contrast, fast and slow growing late successional species are both characterised by low carbon assimilation values, but by distinct stomatal conductance and leaf morphological features. Along the successional gradient, these differences result in much lower ∆ for the intermediate species (i.e. fast growing late successional) as compared to the two other groups.13 C / functional diversity / leaf gas exchange / species grouping / tropical rainforest Résumé -Le statut successionnel des espèces de la forêt tropicale humide est associé à des différences de discrimination isotopique du carbone et de traits fonctionnels foliaires. Nous avons caractérisé la variabilité interspécifique des échanges gazeux et des traits morphologiques foliaires en conditions environnementales contrôlées de jeunes plants de 22 espèces d'arbres de la canopée en forêt tropicale humide afin de comprendre l'origine de la variabilité de la discrimination isotopique du carbone foliaire (∆) observée entre ces espèces présentant des caractéristiques de croissance et de dynamique distinctes (groupes successionnels). Nous montrons premièrement que les espèces tropicales possèdent une stratégie très conservée de ∆ au cours de leur ontogénie (juvéniles élevés ici versus arbres adultes de la canopée en forêt naturelle). Deuxièmement, ∆ était négativement corrélée à WUE et N, et positivement à g s , mais les différences de ∆ entre espèces sont principalement expliquées par des différences de WUE. Enfin, nous montrons que les espèces appartenant à des groupes successionnels distincts présentent des traits fonctionnels et morphologiques foliaires distincts. Nous confirmons que les espèces à croissance rapide qui s'installent en premier au cours de la succession écologique (FE) maximisent A avec de fortes conductances stomatiques. Les espèces climax (qui s'installent en second dans la succession écologique), à croissance rapide (FL) ou à croissance faible (SL), présentent des valeurs de A identiques, mais des valeurs de g s ainsi que des caractéristiques morphologiques foliaires distinctes. Dans la succession éc...

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Functional diversity from network response dynamics

Dragicevic

2015

J Bioecon

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Apports d'un modèle démographique plurispécifique pour l'étude des relations diversité / dynamique en forêt tropicale guyanaise

Cited by 10 publications

References 2 publications

Can functional classification of tropical trees predict population dynamics after disturbance?

Can functional classification of tropical trees predict population dynamics after disturbance?

The successional status of tropical rainforest tree species is associated with differences in leaf carbon isotope discrimination and functional traits

Functional diversity from network response dynamics

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