Eric Nicolini's research while affiliated with French National Centre for Scientific Research and other places

Publications (63)

Article
Full-text available
Tree structural and biomass growth studies mainly focus on the shoot compartment. Tree roots usually have to be taken apart due to the difficulties involved in measuring and observing this compartment, particularly root growth. In the context of climate change, the study of tree structural plasticity has become crucial and both shoot and root syste...
Article
Full-text available
Trait-environment relationships have been described at the community level across tree species. However, whether interspecific trait-environment relationships are consistent at the intraspecific level is yet unknown. Moreover, we do not know how consistent is the response between organ vs whole-tree level.We examined phenotypic variability for 16 f...
Preprint
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A bstract Trait-environment relationships have been described at the community level across tree species. However, whether interspecific trait-environment relationships are consistent at the intraspecific level is yet unknown. Moreover, we do not know how consistent is the response between organ vs. whole-tree level. We examined phenotypic variabil...
Article
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1. Although the leaf economic spectrum has deepened our understanding of leaf trait variability, little is known about how leaf traits scale with leaf area. This uncertainty has resulted in the assumption that leaf traits should vary by keeping the same pace of variation with increases in leaf area across the leaf size range. We evaluated the scali...
Article
1.Soil water and nutrient availability are key drivers of tree species distribution and forest ecosystem functioning, with strong species differences in water and nutrient use. Despite growing evidence for intraspecific trait differences, it remains unclear under which circumstances the effects of environmental gradients trump those of ontogeny and...
Article
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Increasing or decreasing wood density (WD) from pith to bark is commonly observed in tropical tree species. The different types of WD radial variations, long been considered to depict the diversity of growth and mechanical strategies among forest guilds (heliophilic vs. shade-tolerant), were never analyzed in the light of heartwood (HW) formation....
Article
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Knowledge of plant architecture allows retrospective study of plant development, hence provides powerful tools, through modelling and simulation, to link this development with environmental constraints, and then predict its response to global change. The present study aims to determine some of the main endogenous and exogenous variables driving the...
Article
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Investigations of basic radial wood density (WD) in tropical trees revealed linear patterns and some curvilinear patterns. Studies usually disregard longitudinal variations, which are often considered to be similar to radial variations. This study aimed to show (1) a new radial curvilinear WD pattern, (2) differences in amplitude between radial and...
Preprint
Corners rule predicts a positive correlation between leaf dimensions and the cross-sectional area of the primary stem. Although this relationship is usually explained by hydraulic and mechanical requirements, these hypotheses have never been tested empirically. However, Corner’s rule is tricky to investigate since rapid secondary growth of the stem...
Article
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Des essais de plantations forestières ont été menés en Guyane française depuis le début des années 1960 sur plus de 138 espèces (70 espèces natives et 68 espèces exotiques). Une étude récente sur la productivité de ces espèces en plantation (projet ForesTreeCulture, 2013-2015) a mis en avant le fort potentieldeproductiondetroisespècesnatives (Simar...
Article
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Online reading: http://rdcu.be/kJHG Key messageSapwood area and the radial growth rate of the trunk follow the same pattern at breast height, with an initial increase and subsequent constant value, resulting from the increasing growth allocation toward the crown rather than tree decline. Heartwood area and heartwood volume in the trunk increase mo...
Article
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Forest plantation trials have been conducted in French Guiana since the early 1960s with over 138 tree species (70 native and 68 exotic). A recent study on their productivity in plantations (ForesTreeCulture project, 2013-2015) showed the high potential of three native species (Simarouba amara Aubl., Vochysia tomentosa (G. Mey.) DC., Bagassa guiane...
Article
Salicaceae have been enlarged to include a majority of the species formerly placed in the polyphyletic tropical Flacourtiaceae. Several studies have reported a peculiar and infrequently formed multilayered structure of tension wood in four of the tropical genera. Tension wood is a tissue produced by trees to restore their vertical orientation and m...
Conference Paper
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Background Tree above ground biomass (AGB) is currently estimated by tree-level allometrical models that take into account, tree volume estimated from proxy variables of tree size (DBH) and species average wood specific gravity (WSG). These methods are common and realistic from a practical point of view. However, they do not take into account devia...
Conference Paper
Full-text available
Most studies on tropical plant phenology have focused on patterns of flowering, fruiting and leaf-shedding. They are based on time-consuming continuous surveys over seasons or years and the basic considered scale is the tree integrated within a population or a community. So, the functioning of the different axis categories inside the crown of one i...
Conference Paper
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Over the past decade, much attention has been devoted to the development of forest biomass estimation methods at a stand scale, leading to the establishment of allometric models (Chave et al., 2014). These allometric equations use a unique wood specific gravity value (WSG) per species, but neglect the within tree variations of WSG found by others (...
Article
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Key message In French Guiana, the leaf and cambium phenologies should not be considered only as exogenous-driven processes, as the dry season, but also as endogenous-driven, as tree development stage. Abstract Studies of the periodicity of wood formation provide essential data on tree age and on factors that control tree growth. The aim of this...
Poster
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La variation d’infra-densité du bois (WSG, Williamson & Wiemann 2010) constitue un phénomène central du développement de l’arbre. La variation radiale de WSG a été largement étudiée chez plusieurs espèces forestières tropicales (Nock et al 2009 ; Schüller et al 2013) tandis que la variation longitudinale est restée peu documentée. Pourtant, elle pe...
Conference Paper
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Tree crown mortality: relevance in predicting sapwood amount and radial growth rate in a tropical forest tree of French Guiana (Dicorynia guianensis Amsh., Fabaceae)
Article
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Patterns of leaf production and leaf fall directly influence leaf area index and forest productivity. Here, we focused on Cecropia sciadophylla individuals inhabiting the extremes of the gradient in seasonality in rainfall at which C. sciadophylla occurs. In Colombia and French Guiana we compared the intra-annual variation in leaf production as wel...
Article
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• Irradiance elicits a large plasticity in leaf traits, but little is known about the modulation of this plasticity by ontogeny. Interactive effects of relative irradiance and ontogeny were assessed on leaf traits for two tropical rainforest tree species: Dicorynia guianensis Amshoff and Tachigali melinonii (Harms) Barneby (Fabaceae, Caesalpinioide...
Article
1. Niche differentiation is a key issue in the current debate on community assembly mechanisms. In highly diverse moist tropical forests, tree species sensitivity to canopy openness is thought to be a major axis in niche differentiation. In the past, the syndrome of traits driving the demographic trade-off involved in the niche-based theory of coex...
Article
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• Context Functional–structural models (FSM) of tree growth have great potential in forestry, but their development, calibration and validation are hampered by the difficulty of collecting experimental data at organ scale for adult trees. Due to their simple architecture and morphological properties, “model plants” such as Cecropia sciadophylla ar...
Article
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Forest successional processes following disturbance take decades to play out, even in tropical forests. Nonetheless, records of vegetation change in this ecosystem are scarce, increasing the importance of the chronosequence approach to study forest recovery. However, this approach requires accurate dating of secondary forests, which until now was a...
Article
1. Considerable debate surrounds the extent to which tropical forests can be managed for resource extraction while conserving biodiversity and ecosystem properties, which depend on functional composition. Here we evaluate the compatibility of these aims by examining the effects of logging on taxonomic and functional diversity and composition in a t...
Article
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Context: In tropical areas, studies based on the retrospective analysis of tree development have focused principally on growth ring research. The interpretation of primary growth markers is overlooked although it opens perspectives to pro- vide long time-series on tree-crown development. Aims: This study focused on Parkia velutina, an emergent tree...
Poster
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Long-term data on tropical trees growth and phenology are crucial to understand tropical forests responses to global changes. The majority of studies are based on time-consuming continuous-surveys while retrospective methods use morpho-anatomical markers to retrieve the past growth history of trees. Tree-rings are now widely used but the others dev...
Conference Paper
Full-text available
Most studies on tropical plant phenology have focused on patterns of flowering, fruiting and leaf-shedding. Field surveys are used in most studies, some of them relying on remote-sensing data. Phenological examinations of cambium are scarces, despite the importance of secondary growth to dendrochronology and retrospective growth-ring analysis. We s...
Article
The growth and branching patterns of the main axis of 6-year-old sessile oak, growing in a natural regeneration in the north of France, were analysed each year retrospectively according to three increasing canopy density conditions: large gap, small gap, and dense canopy. Increasing gap size is associated with an increase in the total height, basal...
Article
Full-text available
The inability to flower and produce fruit above 1100 m a.s.l. is an important characteristic of Rubus alcei folius Poiret (Rosaceae), an introduced bramble that has invaded large areas of tropical rain forest on Réunion island. Why does R. alceifolius not fruit in the highlands? It is known that a minimal morphological structure and structural matu...
Article
Full-text available
Simultaneous observation of morphological and anatomical markers allowed us to reconstitute the growth pattern of the main axis in two populations of sessile oak aged 15 and 29 years, respectively. The comparison of the morphological features of annual shoots and growth units according to either their ontogenic age or their year of formation allowe...
Article
Le hêtre a une croissance rythmique où chaque pousse annuelle est constituée d'une unité de croissance (u.c.) printanière parfois suivie, quelques semaines plus tard, d'une unité de croissance estivale. L'u.c. printanière présente une disposition foliaire alterne distique, tandis que l'u.c. estivale, selon certains auteurs, a une disposition foliai...
Article
A qualitative architectural analysis conducted on young beech (Fagus sylvatica L.), benefiting from the protection of a leaf canopy or exposed to full sunlight, revealed architectural characteristics susceptible of influencing the arrangement of vertical lateral axes entering in direct competition with the trunk and contributing to the formation of...
Article
The importance of plant bio-cycling in the biogeochemical cycle of Si has been pointed out by recent studies. We analysed the litter and wood chemical composition of a lowland rainforest (Marelongue Reserve, Réunion Island, Indian ocean) not impacted by human activities, developed on a recent basalt flow dated ci 500years. The amount of elements st...
Article
In a recent study based on a retrospective reconstruction of growth, we showed for Cecropia sciadophylla that branching and flowering processes, as well as alternation of long and short nodes were regularly spaced by ~23 nodes. We also found that this strong periodicity was related to an annual cycle of growth. Adult trees are successful individual...
Article
The relation between primary and secondary growth has been traditionally studied in terms of growth units and has always being assumed as closely correlated. Pluviometric variation directly affects growth patterns in the neotropical pioneer species Jacaranda copaia. In French Guiana this species produces annual growth rings in the dry season that c...
Article
Question: What are the relative roles of tree growth, mortality and recruitment in variations of above-ground biomass in tropical forests?Location: Paracou, French Guiana.Methods: We quantified the contribution of growth, recruitment and mortality to total biomass of stands (trees DBH≥10 cm) in six 6.25-ha permanent plots over 16 yr. Live biomass s...
Article
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Although there is an increasing number of models simu-lating the functional and structural development of trees at organ scale, few of them can be fully calibrated, evaluated and validated. A major obstacle resides in the intrinsic complexity of trees due to their high stature, large number of organs and long life span that limits the possibilities...
Article
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Face a la complexite des structures arborescentes et en fonction d'objectifs particuliers, divers types de modeles de croissance et de production des arbres et peuplements fgorestiers se sont developpes. Il est ainsi possible de distinguer : des modeles de type statistique, des modeles de production vegetale, etc... Dans le domaine de la simulation...
Article
Le genre Cecropia regroupe des arbres pionniers, à croissance rapide, qui colonisent les aires défrichées et les milieux ouverts à fort ensoleillement. Leur architecture est relativement simple et conforme au modèle de Rauh. Tout au long de la vie de la plante il est possible de retrouver a posteriori les cicatrices de feuille, d’inflorescences et...
Conference Paper
The genus Cecropia includes pioneer trees that colonize canopy gaps and cleared areas. It is widely distributed from Mexico to Northern Argentina. Cecropia trees have architecture, which corresponds to the Rauh’s architectural model. In recent studies we have found that C. obtusa/ and C. sciadophylla, in French Guiana, have a strong annual periodic...
Article
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In beech (Fagus sylvatica L.), the number of leaf primordia preformed in the buds determines the length and the type (long versus short) of annual growth units, and thus, branch growth and architecture. We analyzed the correlation between the number of leaf primordia and the hydraulic conductance of the vascular system connected to the buds. Termin...
Article
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This study looked at the interactive effects of tree architectural stage of development (ASD) and light availability on different plant traits (growth parameters, leaf morpho-anatomy and photosynthetic capacities) in the tropical species Dicorynia guianensis. A qualitative architectural analysis was used to categorize tree individuals sampled along...
Article
Full-text available
In beech (Fagus sylvatica L.), the number of leaf primordia preformed in the buds determines the length and the type (long versus short) of annual growth units, and thus, branch growth and architecture. We analyzed the correlation between the number of leaf primordia and the hydraulic conductance of the vascular system connected to the buds. Termin...
Article
Full-text available
Architectural analyses of temperate tree species using a chronological approach suggest that the expression of epicormic branches is closely related to low growth rates in the axes that make up the branching system. Therefore, sole consideration of epicormic criteria may be sufficient to identify trees with low secondary growth levels or with both...
Article
Full-text available
The aim of this study was to identify the developmental stages of Rubus alceifolius and to determine one or more characteristic morphological markers for each stage. The developmental reconstitution method used involved a detailed description of many individuals throughout the different stages of growth, from germination to the development of an ad...
Article
Full-text available
Les forets heterogenes guyanaises sont des milieux complexes dont la gestion passe par la comprehension de leur organisation (structure spatiale, horizontale et verticale et diversite specifique) et de leur dynamique. Dans ce contexte, l'etude des strategies de developpement et d'occupation de l'espace des arbres permet de mieux comprendre comment...
Article
A study of the formation of epicormic branches on suppressed beech trees revealed developmental sequences that had not hitherto been studied in depth. By combining architectural analysis and anatomy, it was possible to trace the history of the plant and thus fully understand the ontogenesis of the individuals studied. The main sequences observed we...
Article
The development of a given species in a natural forest depends on a multitude of factors. Insects are one of the factors that have an important impact. We would like to present initial observations about the behaviour of longicorns of the Onciderini tribe and their impact on the development of Dicorynia guianensis . A study of the development of D....
Article
The growth and branching patterns of the main axis of 6-year-old sessile oak, growing in a natural regeneration in the north of France, were analysed each year retrospectively according to three increasing canopy density conditions: large gap, small gap, and dense canopy. Increasing gap size is associated with an increase in the total height, basal...
Article
Full-text available
Simultaneous observation of morphological and anatomical markers allowed us to reconstitute the growth pattern of the main axis in two populations of sessile oak aged 15 and 29 years, respectively. The comparison of the morphological features of annual shoots and growth units according to either their ontogenic age or their year of formation allowe...
Article
In beech, no external morphological characters that allow an understanding of how an individual stem gradually and continuously evolves from a juvenile vegetative stage toward a mature flowering stage, has ever been demonstrated. The only known traits are marcescence, indicating a juvenile stage, and flowering, indicating passage to adult stage. Ho...
Article
This study give a global vision of the beechtree development. This study is a description of the beech architectural development from the seed to the death plant in various environments. This study has allowed to propose or precise some hypothesis about the signification of certain beech development phases. The edification of the architectural unit...

Citations

... Both statistics were calculated considering intraspecific variation using the phytools package for R (Revell, 2012). , 1995;Schuerger et al., 1997;Olson et al., 2009 Internode length internode_l cm Ø Growth rate, leaf spacing Weijschedé et al., 2007;Dong et al., 2010 Proportion of pith %_pith Ø Area of pith whole section area Primary growth, stem biomechanics Carlquist, 1974;Niklas, 1992;Levionnois et al., 2018 Proportion of wood %_wood Ø Area of wood whole section area Secondary growth, stem biomechanics Penfound, 1931;Schuerger et al., 1997;Hummel et al., 2007 Proportion of cortex %_cortex Ø Dispersal, reproductive allocation Cornelissen, 1999;Cornelissen et al., 2003 References are given to justify the interest of each trait for corresponding functions. IN, internode; POM, point of measurement; LF, leaf; BR, branch; TR, trunk. ...
... These included pith, xylem, stiff bark, and soft bark. From a mechanical perspective, delimiting the pith is important since it maximises second moment of area of lignified tissues for petioles and stems of self-supporting plants (Mahley et al., 2018;Olson et al., 2018;Pittermann and Olson, 2018;Levionnois et al., 2020Levionnois et al., , 2021. Medullary fibres were not considered separately as a mechanical tissue for the regression analyses. ...
... The few studies available have used different, hardly comparable plant material and experimental designs, explaining the wide disparities reported in performance and traits [75,78,79]. As biomass allocation patterns and root traits are known to be influenced by environmental conditions and plant ontogeny [80,81], our results contribute to fill a gap in the knowledge of tropical legume tree seedlings establishment. ...
... These radial trends in WSG may reflect the combined effects of the age of the vascular cambium, which can determine the size of wood cells produced (Lachenbruch et al. 2011), or tree diameter, since trees adjust their wood anatomy in response to size-related changes in mechanical and hydraulic demands (Nock et al. 2009;Williamson and Wiemann 2010a;Rungwattana & Hietz 2017). Alternatively, these radial changes might be a consequence of the deposition of wood extractives in the inner wood during heartwood formation (Lehnbach et al. 2019, but see Larjavaara and Muller-Landau 2010). ...
... On the other hand, August of the previous growing season, together with current April conditions, would seem to be critical in the establishment of lateral shoots. Since bud formation occurs late in the growing season (Barthélémy and Caraglio, 2007), the importance of soil water balance during August is surely related to these critical phases of ontogenesis (Buissart et al., 2018), while in April soil conditions are related to dormancy or the initiation of buds. In both functional groups, these intra-annual differences clearly confirm contrasting developmental phenologies, which still remain to be explored in depth. ...