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| Author | Engel, J.; Brousseau, L.; Baraloto, C. | ||||
| Title | GuiaTreeKey, a multi-access electronic key to identify tree genera in French Guiana | Type | Journal Article | ||
| Year | 2016 | Publication | PhytoKeys | Abbreviated Journal | PhytoKeys |
Volume  |
68 | Issue | 1 | Pages | 27-44 |
| Keywords | Amazonia; Electronic key; French Guiana; Morphological characters; Neotropics; Trees identification; Xper2 | ||||
| Abstract | The tropical rainforest of Amazonia is one of the most species-rich ecosystems on earth, with an estimated 16000 tree species. Due to this high diversity, botanical identification of trees in the Amazon is difficult, even to genus, often requiring the assistance of parataxonomists or taxonomic specialists. Advances in informatics tools offer a promising opportunity to develop user-friendly electronic keys to improve Amazonian tree identification. Here, we introduce an original multi-access electronic key for the identification of 389 tree genera occurring in French Guiana terra-firme forests, based on a set of 79 morphological characters related to vegetative, floral and fruit characters. Its purpose is to help Amazonian tree identification and to support the dissemination of botanical knowledge to non-specialists, including forest workers, students and researchers from other scientific disciplines. The electronic key is accessible with the free access software Xper2, and the database is publicly available on figshare: https://figshare.com/s/75d890b7d707e0ffc9bf (doi: 10.6084/m9.figshare.2682550). © Julien Engel et al. | ||||
| Address | International Center for Tropical Botany, Department of Biological Sciences, Florida International University, 11200 SW 8th Street, Miami, FL, United States | ||||
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| Notes | Export Date: 8 September 2016 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 693 | ||
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| Author | Stien, D.; Gastaldi, S. | ||||
| Title | Design of polyaromatic hydrocarbon-supported tin reagents: A new family of tin reagents easily removable from reaction mixtures | Type | Journal Article | ||
| Year | 2004 | Publication | Journal of Organic Chemistry | Abbreviated Journal | J. Org. Chem. |
| Volume |
69 | Issue | 13 | Pages | 4464-4470 |
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| Abstract | We report in this paper the preparation and use of stannanes 11, 12a, and 12b, compounds whose 3-pyrenylpropyl side chain affinity for activated carbon simplifies tin removal and product isolation. Our pyrene-supported reagents can be used for radical reductions and cyclizations (11), radical and cationic allylations (12a), and Stille couplings (12b) in much the same way as tributyltin derivatives. | ||||
| Address | CNRS UPS 2561, Cayenne 97300, French Guiana, Email: didier.stien@guyane.cnrs.fr | ||||
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| Publisher | AMER CHEMICAL SOC | Place of Publication | Editor | ||
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| ISSN | 0022-3263 | ISBN | Medium | ||
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| Notes | ISI:000222187200022 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 263 | ||
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| Author | Brémaud, I.; El Kaïm, Y.; Guibal, D.; Minato, K.; Thibaut, B.; Gril, J. | ||||
| Title | Characterisation and categorisation of the diversity in viscoelastic vibrational properties between 98 wood types | Type | Journal Article | ||
| Year | 2012 | Publication | Annals of Forest Science | Abbreviated Journal | Ann. Forest Sci. |
| Volume |
69 | Issue | 3 | Pages | 373-386 |
| Keywords | Damping coefficient; Dynamic mechanical properties; Specific dynamic modulus of elasticity; Specific gravity; Viscoelastic vibrational properties; Wood diversity | ||||
| Abstract | · Context Increased knowledge on diversity in wood properties would have implications both for fundamental research and for promoting a diversification of uses as material. · Aims The objective is to contribute to overcoming the critical lack of data on the diversity of wood dynamic mechanical/viscoelastic vibrational properties by testing lesser known species and categorising sources of variability. · Methods Air-dry axial specific dynamic modulus of elasticity (E′/γ) and damping coefficient (tand) were measured on a wide sampling (1,792 specimens) of 98 wood types from 79 species. An experimental device and protocol was designed for conducting systematic (i.e. rapid and reproducible) characterisations. · Results Diversity at the specimens' level corroborates the “standard” relationship between tanδ and E'/γ, which is discussed in terms of orientation of wood elements and of chemical composition. Diversity at the species level is expressed on the basis of results for normal heartwood, with specific gravity (γ) ranging from 0.2 to 1.3. Axial E'/γ ranges from 9 to 32 GPa and tand from 4×10 -3 to 19×10 -3. Properties distribution follows a continuum, but with group characteristics. The lowest values of tanδ are only found in certain tropical hardwoods. Results can also suggest alternative species for musical instruments making. · Conclusion The variations in specific gravity, in stiffness or in “viscosity” appear to be predominantly linked to different levels of diversity: between species or between wood types (reaction wood or taxonomy-related differences in heartwood extractives). © INRA/Springer-Verlag France 2011. | ||||
| Address | Wood Laboratory, EMPA, Überlandstrasse 129, 8600 Dübendorf, Switzerland | ||||
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| ISSN | 12864560 (Issn) | ISBN | Medium | ||
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| Notes | Export Date: 20 June 2012; Source: Scopus; Coden: Afosf; doi: 10.1007/s13595-011-0166-z; Language of Original Document: English; Correspondence Address: Brémaud, I.; Wood Laboratory, EMPA, Überlandstrasse 129, 8600 Dübendorf, Switzerland; email: iris_bremaud@hotmail.com | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 403 | ||
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| Author | McLean, J.P.; Arnould, O.; Beauchene, J.; Clair, B. | ||||
| Title | The effect of the G-layer on the viscoelastic properties of tropical hardwoods | Type | Journal Article | ||
| Year | 2012 | Publication | Annals of Forest Science | Abbreviated Journal | Ann. Forest Sci. |
| Volume |
69 | Issue | 3 | Pages | 399-408 |
| Keywords | Dma; G-layer; Reaction wood; Tropical wood; Viscoelasticity | ||||
| Abstract | · Context and aim This study aimed to examine the effect of the tension wood G-layer on the viscoelastic properties of wood. · Methods Tension wood and opposite wood samples were obtained from six French Guianese tropical rainforest species (Sextonia rubra, Ocotea guyanensis, Inga alba, Tachigali melinoni, Iyranthera sagotiana and Virola michelii); the tension wood of the former three of these species had a Glayer, whilst the tension wood from the latter three had no Glayer. Tensile dynamic mechanical analysis (DMA) was performed on green never dried wood samples in the longitudinal direction with samples submerged in a water bath at a temperature (30°C) and frequency (1 Hz) representative of the conditions experienced by wood within a living tree. Then, DMA was repeated with samples conditioned to an air-dried state. Finally, samples were oven-dried to measure longitudinal shrinkage. · Results Tension wood did not always have a higher longitudinal storage (elastic) modulus than opposite wood from the same tree regardless of the presence or absence of a G-layer. For the species containing a G-layer, tension wood had a higher damping coefficient and experienced a greater longitudinal shrinkage upon drying than opposite wood from the same species. No difference was found in damping coefficients between tension wood and opposite wood for the species that had no G-layer. · Conclusion It is proposed that the different molecular composition of the G-layer matrix has an influence on the viscoelasticity of wood, even if a biomechanical gain is not yet clear. This study shows that rheological properties and longitudinal shrinkage can be used to detect the presence of a G-layer in tension wood. © INRA/Springer-Verlag France 2011. | ||||
| Address | UMR Ecologie des Forêts de Guyane (ECOFOG), CIRAD, Kourou, French Guiana | ||||
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| ISSN | 12864560 (Issn) | ISBN | Medium | ||
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| Notes | Export Date: 20 June 2012; Source: Scopus; Coden: Afosf; doi: 10.1007/s13595-011-0164-1; Language of Original Document: English; Correspondence Address: McLean, J.P.; Forest Products Research Institute, Edinburgh Napier University, Merchiston Campus, Edinburgh EH10 5DT, United Kingdom; email: p.mclean@napier.ac.uk | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 404 | ||
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| Author | Letort, V.; Heuret, P.; Zalamea, P.-C.; De Reffye, P.; Nicolini, E. | ||||
| Title | Analysing the effects of local environment on the source-sink balance of Cecropia sciadophylla: A methodological approach based on model inversion | Type | Journal Article | ||
| Year | 2012 | Publication | Annals of Forest Science | Abbreviated Journal | Ann. Forest Sci. |
| Volume |
69 | Issue | 2 | Pages | 167-180 |
| Keywords | Cecropia; Functional-structural model; Model inversion; Morphology; Trophic competition | ||||
| Abstract | 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 are of great interest to validate new models and methodologies, since exhaustive descriptions of their plant structure and mass partitioning can be gathered. Aims Our objective was to develop a model-based approach to analysing the influence of environmental conditions on the dynamics of trophic competition within C. sciadophylla trees. Methods We defined an integrated environmental factor that includes meteorological medium-frequency variations and a relative index representing the local site conditions for each plant. This index is estimated based on model inversion of the GreenLab FSM using data from 11 trees for model calibration and 7 trees for model evaluation. Results The resulting model explained the dynamics of biomass allocation to different organs during the plant growth, according to the environmental pressure they experienced. Perspectives By linking the integrated environmental factor to a competition index, an extension of the model to the population level could be considered. © INRA and Springer Science+Business Media B.V. 2011. | ||||
| Address | UMR ECOFOG Campus Agronomique, INRA, BP 316, 97379 Kourou cedex, French Guiana | ||||
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| ISSN | 12864560 (Issn) | ISBN | Medium | ||
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| Notes | Cited By (since 1996): 1; Export Date: 20 June 2012; Source: Scopus; Coden: Afosf; doi: 10.1007/s13595-011-0131-x; Language of Original Document: English; Correspondence Address: Letort, V.; Department of Applied Mathematics and Systems (MAS), Ecole Centrale Paris, Grande voie des Vignes, Chatenay-Malabry 92295, France; email: veronique.letort@centraliens.net | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 405 | ||
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| Author | Nicolini, E.; Beauchene, J.; De La Vallee, B.L.; Ruelle, J.; Mangenet, T.; Heuret, P. | ||||
| Title | Dating branch growth units in a tropical tree using morphological and anatomical markers: The case of Parkia velutina Benoist (Mimosoïdeae) | Type | Journal Article | ||
| Year | 2012 | Publication | Annals of Forest Science | Abbreviated Journal | Ann. Forest Sci. |
| Volume |
69 | Issue | 5 | Pages | 543-555 |
| Keywords | Crown development; Deciduousness; Dendrochronology; French Guiana; Growth ring; Phenology; Tree architecture; Wood anatomy | ||||
| Abstract | • 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 provide long time-series on tree-crown development. • Aims This study focused on Parkia velutina, an emergent tree of neotropical rain forests. Our objectives were (1) to characterize the phenological cycle of this species, and (2) to identify temporally interpretable morphological and anatomical markers. • Methods We collected dominant branches in 14 adult trees and identified growth markers that limit longitudinal and radial increments. We coupled this approach with a 2-year phenological survey of 20 trees. • Results Leaf shedding, growth unit elongation and growth ring formation define the phenological cycle. At tree scale, this cycle is synchronous and affects all axes. At population scale, trees can be desynchronized. This cycle is annual despite some slight variability. Successive growth units and growth rings are easily identifiable. • Conclusion Dating a branch by counting the number of growth units or growth rings is possible in many years with a reasonable error. Nevertheless, estimating their precise month of formation in order to study climatic influences remains difficult. © INRA/Springer-Verlag France 2012. | ||||
| Address | INRA, UMR AMAP, TA A-51/PS2, Montpellier 34398, France | ||||
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| ISSN | 12864560 (Issn) | ISBN | Medium | ||
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| Notes | Export Date: 27 September 2012; Source: Scopus; Coden: Afosf; doi: 10.1007/s13595-011-0172-1; Language of Original Document: English; Correspondence Address: Nicolini, E.; Unité Mixte de Recherche CIRAD-CNRS-INRA-IRD-Université Montpellier 2, BotAnique et BioinforMatique de l'Architecture des Plantes (AMAP), BP 701, Kourou 97387, French Guiana; email: eric-andre.nicolini@cirad.fr | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 436 | ||
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| Author | Royer, M.; Rodrigues, A.M.S.; Herbette, G.; Beauchene, J.; Chevalier, M.; Herault, B.; Thibaut, B.; Stien, D. | ||||
| Title | Efficacy of Bagassa guianensis Aubl. extract against wood decay and human pathogenic fungi | Type | Journal Article | ||
| Year | 2012 | Publication | International Biodeterioration and Biodegradation | Abbreviated Journal | Int. Biodeterior. Biodegrad. |
| Volume |
70 | Issue | Pages | 55-59 | |
| Keywords | Antifungal; Bagassa guianensis; Extractives; Natural durability; Polyphenols; Synergy | ||||
| Abstract | Extractives that provide natural resistance to Bagassa guianensis Aubl. heartwood were examined. Soil-bed tests showed that the B. guianensis heartwood resistance was significantly reduced after ethyl acetate extraction, whereas methanol and especially water extractions improved the resistance. The ethyl acetate extract was submitted to a bioguided fractionation, and fractions were tested against one wood-destroying fungal strain (Pycnoporus sanguineus) and two human pathogenic fungal strains (Candida glabrata (yeast) and Trichophyton rubrum (filamentous dermatophyte)). Fraction F7, which exhibited the strongest antifungal activity, was subsequently fractionated by high performance liquid chromatography (HPLC). Six previously described compounds were isolated. Although the two moracins, 6-O-methyl-moracin N (3) and moracin N (4) were the most active against fungal strains with MIC values between 4 and 16 μg ml -1, the isolated compounds showed less or equivalent antifungal activity than the initial fraction. Possible synergism between compounds 3 and 4 and other secondary metabolites have been hypothesized. Our study demonstrated that this extract as a whole might be used as a wood preservation or antimycotic product. © 2012 Elsevier Ltd. | ||||
| Address | CNRS, Institut de Chimie des Substances Naturelles, 1 avenue de la Terrasse, 91198 Gif-sur-Yvette, France | ||||
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| ISSN | 09648305 (Issn) | ISBN | Medium | ||
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| Notes | Export Date: 2 May 2012; Source: Scopus; Coden: Ibbie; doi: 10.1016/j.ibiod.2011.10.016; Language of Original Document: English; Correspondence Address: Royer, M.; Centre de recherche sur le bois, Département des sciences du bois et de la forêt, Faculté de foresterie de géographie et de géomatique, Université Laval, 2425, rue de la Terrasse, Québec, QC, G1V 0A6, Canada; email: mariana.royer.1@ulaval.ca | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 398 | ||
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| Author | Scotti, I.; Montaigne, W.; Cseke, K.; Traissac, S. | ||||
| Title | RaBoT: A rarefaction-by-bootstrap method to compare genome-wide levels of genetic diversity | Type | Journal Article | ||
| Year | 2013 | Publication | Annals of Forest Science | Abbreviated Journal | Ann. Forest Sci. |
| Volume |
70 | Issue | 6 | Pages | 631-635 |
| Keywords | Diversity comparison; Genome scan; Genome-level diversity; Population genetics; Statistical testing | ||||
| Abstract | Context: No efficient method is available to compare multi-locus estimates of diversity while taking into account inter-locus and inter-population stochastic variance. The advent of genome scan approaches makes the development of such tests absolutely necessary. Aims: We developed a method to compare genome-wide diversity estimates while taking into account – and factoring out – variation in census size and making use of inter-locus variance to assess significance of differences in diversity levels. Methods: An approach based on rarefaction with bootstrap re-sampling (RaBoT) was implemented into a test of multi-locus comparison of diversity coded in R. The properties of the test were studied by applying it to simulated populations with varying diversity levels and varying differences in diversity levels. The test was then applied to empirical data from disturbed and undisturbed populations of Virola michelii (Myristicaceae) genotyped at 693 amplified fragment length polymorphism (AFLP) markers. Results: RaBoT was found to be rather conservative, with large numbers of false negatives when the diversity in the compared populations was similar, and false positives mostly associated to comparisons of populations with extremely high levels of diversity. When applied to empirical data, RaBoT detected higher genetic diversity in a post-disturbance than in an undisturbed population and lower genetic diversity in a seedling than in the corresponding adult population, but it also revealed differences in diversity between subgroups within the disturbed and undisturbed plots. Conclusion: RaBoT is a sensitive method to compare multi-locus levels of diversity that can be applied both at the genotype level for dominant markers (e.g. AFLP) and at the allele level for biallelic codominant markers (e.g. single-nucleotide polymorphisms). © 2013 INRA and Springer-Verlag France. | ||||
| Address | Unité Mixte de Recherche ecologie des Forêts de Guyane (EcoFoG), AgroParisTech, Kourou, French Guiana | ||||
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| ISSN | 12864560 (Issn) | ISBN | Medium | ||
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| Notes | Export Date: 30 August 2013; Source: Scopus; Coden: Afosf; doi: 10.1007/s13595-013-0302-z; Language of Original Document: English; Correspondence Address: Scotti, I.; Unité Mixte de Recherche ecologie des Forêts de Guyane (EcoFoG), INRA, Institut National de la Recherche Agronomique, BP 709, 97387 Kourou cedex, French Guiana; email: ivan.Scotti@ecofog.gf | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 498 | ||
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| Author | Clair, B.; Alteyrac, J.; Gronvold, A.; Espejo, J.; Chanson, B.; Alméras, T. | ||||
| Title | Patterns of longitudinal and tangential maturation stresses in Eucalyptus nitens plantation trees | Type | Journal Article | ||
| Year | 2013 | Publication | Annals of Forest Science | Abbreviated Journal | Ann. Forest Sci. |
| Volume |
70 | Issue | 8 | Pages | 801-811 |
| Keywords | Eucalyptus nitens; G-layer; Longitudinal maturation stress; Maturation strain; Tangential maturation stress; Tension wood | ||||
| Abstract | Context: Tree orientation is controlled by asymmetric mechanical stresses set during wood maturation. The magnitude of maturation stress differs between longitudinal and tangential directions, and between normal and tension woods. Aims: We aimed at evaluating patterns of maturation stress on eucalypt plantation trees and their relation with growth, with a focus on tangential stress evaluation. Methods: Released maturation strains along longitudinal and tangential directions were measured around the circumference of 29 Eucalyptus nitens trees, including both straight and leaning trees. Results: Most trees produced asymmetric patterns of longitudinal maturation strain, but more than half of the maturation strain variability occurred between trees. Many trees produced high longitudinal tensile stress all around their circumference. High longitudinal tensile stress was not systematically associated with the presence of gelatinous layer. The average magnitude of released longitudinal maturation strain was found negatively correlated to the growth rate. A methodology is proposed to ensure reliable evaluation of released maturation strain in both longitudinal and tangential directions. Tangential strain evaluated with this method was lower than previously reported. Conclusion: The stress was always tensile along the longitudinal direction and compressive along the tangential direction, and their respective magnitude was positively correlated. This correlation does not result from a Poisson effect but may be related to the mechanism of maturation stress generation. © 2013 # The Author(s) 2013. This article is published with open access at Springerlink.com. | ||||
| Address | Facultad de Ciencias Forestales, Universidad de Concepcion, Ciudad Universitaria, Concepcion, Chile | ||||
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| Notes | Export Date: 16 December 2013; Source: Scopus; Coden: Afosf; doi: 10.1007/s13595-013-0318-4; Language of Original Document: English; Correspondence Address: Clair, B.; CNRS, UMR Ecologie des Forêts de Guyane (EcoFoG), Campus Agronomique, BP 701, 97387 Kourou, French Guiana; email: bruno.clair@univ-montp2.fr; Funding Details: ANR-12-BS09-0004, French National Research Agency; References: Alméras, T., Fournier, M., Biomechanical design and long-term stability of trees: Morphological and wood traits involved in the balance between weight increase and the gravitropic reaction (2009) J Theor Biol, 256, pp. 370-381. , 19013473 10.1016/j.jtbi.2008.10.011; Alméras, T., Thibaut, A., Gril, J., Effect of circumferential heterogeneity of wood maturation strain, modulus of elasticity and radial growth on the regulation of stem orientation in trees (2005) Trees, 19, pp. 457-467. , 10.1007/s00468-005-0407-6; Archer, R.R., (1986) Growth Stresses and Strains in Trees, , Springer Verlag Berlin/Heidelberg/New York; Archer, R.R., On the origin of growth stresses in trees. 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For., 64, pp. 127-135; Yoshida, M., Ohta, H., Yamamoto, H., Okuyama, T., Tensile growth stress and lignin distribution in the cell walls of yellow poplar, Liriodendron tulipifera Linn (2002) Trees, 16, pp. 457-464. , 10.1007/s00468-002-0186-2 1:CAS:528:DC%2BD38XosFWltro%3D; Yoshida, M., Okuyama, T., Techniques for measuring growth stress (2002) Holzforschung, 56, pp. 461-467. , 10.1515/HF.2002.071 1:CAS:528:DC%2BD38XovVaru7c%3D | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 519 | ||
| Permanent link to this record | |||||
| Author | Marcon, E. | ||||
| Title | Entropy as a common measure of biodiversity and the spatial structure of economic activity | Type | Journal Article | ||
| Year | 2019 | Publication | Revue Economique | Abbreviated Journal | Rev. Econ. |
| Volume |
70 | Issue | 3 | Pages | 305-326 |
| Keywords | Diversity; Economic geography; Spatial concentration; Specialization | ||||
| Abstract | Measures of spatial concentration and specialization in economics are similar to those of biodiversity and ubiquity of species in ecology. Entropy is the fundamental tool that originated in statistical physics and information theory. The definition of number equivalents or effective numbers, that is the number of types in an ideal, simplified distribution, is introduced along with the partitioning of the joint diversity of a bi-dimensional distribution into absolute and relative concentration or specialization and replication. The whole framework is theoretically robust and allows measuring the spatial structure of a discrete space. | ||||
| Address | AgroParisTech, UMR Écologie des forêts de Guyane, CNRS, Cirad, INRA, Université des Antilles, Université de Guyane, Campus Agronomique, BP 701, Kourou, 97310, French Guiana | ||||
| Corporate Author | Thesis | ||||
| Publisher | Presses de Sciences Po | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 00352764 (Issn) | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | EcoFoG @ webmaster @ | Serial | 912 | ||
| Permanent link to this record | |||||