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Author |
Ollivier, M.; Baraloto, C.; Marcon, E. |
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Title |
A trait database for Guianan rain forest trees permits intra- and inter-specific contrasts |
Type |
Journal Article |
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Year |
2007 |
Publication |
Annals of Forest Science |
Abbreviated Journal |
Ann. For. Sci. |
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Volume |
64 |
Issue |
7 |
Pages |
781-786 |
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Keywords |
plant traits; tropical forest; French Guiana; functional groups; plasticity; ontogeny |
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Abstract |
We present a plant trait database covering autecology for rain forest trees of French Guiana. The database comprises more than thirty traits including autecology (e. g., habitat associations and reproductive phenology), wood structure (e. g., density and tension characteristics) and physiology at the whole plant (e. g., carbon and nitrogen isotopes) and leaf level (e. g., specific leaf area, photosynthetic capacity). The current database describes traits for about nine hundred species from three hundred genera in one hundred families. For more than sixty species, data on twelve morphological and ecophysiological traits are provided for individual plants under different environmental conditions and at different ontogenetic stages. The database is thus unique in permitting intraspecific analyses, such as the effects of ontogenetic stages or environmental conditions on trait values and their relationships. |
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INRA, Unit Mixte Rech Ecol Forets Guyane, Kourou, France, Email: baraloto.c@kourou.cirad.fr |
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EDP SCIENCES S A |
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1286-4560 |
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ISI:000250097700011 |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
158 |
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Author |
Ruelle, J.; Beauchene, J.; Thibaut, A.; Thibaut, B. |
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Title |
Comparison of physical and mechanical properties of tension and opposite wood from ten tropical rainforest trees from different species |
Type |
Journal Article |
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Year |
2007 |
Publication |
Annals of Forest Science |
Abbreviated Journal |
Ann. For. Sci. |
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Volume |
64 |
Issue |
5 |
Pages |
503-510 |
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Keywords |
tension wood; opposite wood; tropical rainforest; physical and mechanical properties |
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Abstract |
On 10 trees from 10 species of French Guyana tropical rainforest in a clear active process of restoring verticality growth strains were measured in situ in order to determine the occurrence of tension wood within samples. Wood specimens were cut in the vicinity of the growth strains measurements in order to measure some mechanical and physical properties. As suspected, tensile growth strains was very much higher in tension wood zone, because longitudinal modulus of elasticity was slightly higher. Longitudinal shrinkage was also much higher in tension wood than in opposite wood. |
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Address |
UMR EcoFoG, Kourou 97387, Guyana, Email: ruelle@nuagr1.agr.nagoya-u.ac.jp |
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EDP SCIENCES S A |
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1286-4560 |
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Notes |
ISI:000248098600003 |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
160 |
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Author |
Bonal, D.; Born, C.; Brechet, C.; Coste, S.; Marcon, E.; Roggy, J.C.; Guehl, J.M. |
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Title |
The successional status of tropical rainforest tree species is associated with differences in leaf carbon isotope discrimination and functional traits |
Type |
Journal Article |
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Year |
2007 |
Publication |
Annals of Forest Science |
Abbreviated Journal |
Ann. For. Sci. |
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Volume |
64 |
Issue |
2 |
Pages |
169-176 |
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Keywords |
C-13; functional diversity; leaf gas exchange; species grouping; tropical rainforest |
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Abstract |
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 (Delta) 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 Delta was negatively correlated with WUE and N, and positively correlated with g(s), but among species differences in Delta 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 Delta for the intermediate species (i.e. fast growing late successional) as compared to the two other groups. |
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Address |
INRA Kourou, UMR Ecol Forets Guyane, F-97387 Kourou, Guyane, France, Email: damien.bonal@kourou.cirad.fr |
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EDP SCIENCES S A |
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1286-4560 |
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Notes |
ISI:000244438100006 |
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no |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
169 |
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Author |
Scotti, I.; Paglia, G.; Magni, F.; Morgante, M. |
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Title |
Population genetics of Norway spruce (Picea abies Karst.) at regional scale: sensitivity of different microsatellite motif classes in detecting differentiation |
Type |
Journal Article |
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Year |
2006 |
Publication |
Annals of Forest Science |
Abbreviated Journal |
Ann. For. Sci. |
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Volume |
63 |
Issue |
5 |
Pages |
485-491 |
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Keywords |
conifers; SSR; divergence; statistical testing; genetic distance |
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Abstract |
Four populations of Norway spruce (Picea abies Karst.) were screened using nine nuclear microsatellite markers (three trinucleotides and six dinucleotides) and four chloroplast markers (all mononucleotides). Marker classes were compared for their variability, mutation rate and ability to detect differentiation between stands. Dinucleotide markers proved to be the most variable group and chloroplast stretches the least variable, with differences in mutation rate between the former and the latter spanning over two orders of magnitude. Variability correlated to the number of repeats but not to the absolute length of the microsatellite region. The different marker classes were combined with two different measures of genetic distance in order to investigate the performance of markers and evolutionary models for the study of genetic variation in natural populations of Norway spruce. Weir and Cockeram's F-ST generally performed better in this clear-cut, four-population model study. Chloroplast haplotypes turned out to be the most sensitive marker system, being able to differentiate populations and to detect differences in genetic variability between sub-regions. |
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INRA, UMR ECOFOG, Kourou 97387, French Guiana, Email: ivan.scotti@kourou.cirad.fr |
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EDP SCIENCES S A |
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1286-4560 |
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Notes |
ISI:000240514800005 |
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no |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
177 |
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Author |
Clair, B.; Almeras, T.; Sugiyama, J. |
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Title |
Compression stress in opposite wood of angiosperms: observations in chestnut, mani and poplar |
Type |
Journal Article |
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Year |
2006 |
Publication |
Annals of Forest Science |
Abbreviated Journal |
Ann. For. Sci. |
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Volume |
63 |
Issue |
5 |
Pages |
507-510 |
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Keywords |
reaction wood; compression wood; tension wood; opposite wood; plant biomechanics; growth stresses; microfibrils angle |
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Abstract |
In order to face environmental constraints, trees are able to re-orient their axes by controlling the stress level in the newly formed wood layers. Angiosperms and gymnosperms evolved into two distinct mechanisms: the former produce a wood with large tension pre-stress on the upper side of the tilted axis, while the latter produce a wood with large compression pre-stress on the lower side. In both cases, the difference between this stress level and that of the opposite side, in light tension, generates the bending of the axis. However, light values of compression were sometimes measured in the opposite side of angiosperms. By analysing old data on chestnut and mani and new data on poplar, this study shows that these values were not measurement artefacts. This reveals that generating light compression stress in opposite wood contributes to improve the performance of the re-orientation mechanism. |
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Address |
Kyoto Univ, Res Inst Sustainable Humanosphere, Lab Biomass Morphogenesis & Informat, Uji, Kyoto 6110011, Japan, Email: clair@lmgc.univ-montp2.fr |
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EDP SCIENCES S A |
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1286-4560 |
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Notes |
ISI:000240514800008 |
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no |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
223 |
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Author |
Liu, S.Q.; Loup, C.; Gril, J.; Dumonceaud, O.; Thibaut, A.; Thibaut, B. |
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Title |
Studies on European beech (Fagus sylvatica L.). Part 1: Variations of wood colour parameters |
Type |
Journal Article |
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Year |
2005 |
Publication |
Annals of Forest Science |
Abbreviated Journal |
Ann. For. Sci. |
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Volume |
62 |
Issue |
7 |
Pages |
625-632 |
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Keywords |
Fagus sylvatica L.; CIELab colour system; solid wood; red heartwood |
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Abstract |
Colour parameters of European beech were measured using CIELab system. 103 logs from 87 trees in 9 sites were cut into boards to study the radial variations of wood colour parameters. Both site and tree effects on colour were observed. Patterns of red heartwood occurrence were defined. When excepting red heartwood there was still a highly significant effect of site and tree. Axial and radial variations were small, except very near the pith or in red heartwood, suggesting possible early selection at periphery under colour criteria. Red heartwood is darker, redder and more yellow than normal peripheral wood. |
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Address |
Univ Montpellier 2, Lab Mecan & Genie Civil, F-34095 Montpellier, France, Email: jgril@lmgc.univ-montp2.fr |
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EDP SCIENCES S A |
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1286-4560 |
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Notes |
ISI:000233179100003 |
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no |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
251 |
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Author |
Brosse, Sébastien ; Baglan, Antoine ; Covain, Raphael ; Lalague, Hadrien ; Le Bail, Pierre-Yve ; Vigouroux, Régis ; Quartarollo, Grégory |
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Title |
Aquarium trade and fish farms as a source of non-native freshwater fish introductions in French Guiana |
Type |
Journal Article |
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Year |
2021 |
Publication |
Annales de Limnologie – International Journal of Limnology |
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Volume |
57 |
Issue |
4 |
Pages |
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Abstract |
Rivers of French Guiana are still little invaded by non-native fish, but several fish introductions were recently recorded through the development of aquarium fish trade and fish farms. Here we report records of 11 non-native fish species. Among them, four (Cichla monoculus, Heros efasciatus, Mesonauta guyanae and Poecilia reticulata) are established and one of them (Heros efasciatus) is rapidly increasing its spatial range. Two species (Hyphessobrycon eques and Pterophyllum scalare) were not retrieved in recent records and are probably extinct from French Guiana. The establishment status of the five other species (Arapaima gigas, Colossoma macropomum, Cyprinus carpio, Oreochromis mossambicus and Osteoglossum bicirrhosum) is uncertain and only a few specimens were observed in the wild. Nevertheless, these species, intensively reared in nearby countries, belong to highly invasive species able to cause detrimental impacts on recipient ecosystems. Those first occurrences of invasive fish species in French Guiana should therefore act as an early warning for both researchers and environmental managers. |
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EDP SCIENCES S A |
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Anglais |
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Call Number |
EcoFoG @ webmaster @ |
Serial |
1007 |
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Author |
Lebrini, M.; Robert, F.; Roos, C. |
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Title |
Inhibition Effect of Alkaloids Extract from Annona Squamosa Plant on the Corrosion of C38 Steel in Normal Hydrochloric Acid Medium |
Type |
Journal Article |
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Year |
2010 |
Publication |
International Journal of Electrochemical Science |
Abbreviated Journal |
Int. J. Electrochem. Sci. |
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Volume |
5 |
Issue |
11 |
Pages |
1698-1712 |
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Keywords |
Plant extract; corrosion inhibitors; C38 steel; acidic media; adsorption |
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Abstract |
In this work, an alkaloids extract from Annona squamosa plant have been studied as possible corrosion inhibitor for C38 steel in molar hydrochloric acid (1 M HCl). Potentiodynamic polarization and AC impedance methods have been used. The corrosion inhibition efficiency increases on increasing plant extract concentration. Polarisation studies showed that Annona squamosa extract was mixed-type inhibitor in 1 M HCl. The inhibition efficiency of Annona squamosa extract was temperature-dependent and its addition led to an increase of the activation corrosion energy revealing a physical adsorption between the extract and the metal surface. The adsorption of the Annona squamosa extract followed Langmuir's adsorption isotherm. The inhibitive effect of Annona squamosa is ascribed to the presence of organic compounds in the extract. The examined extract is considered as non-cytotoxic substance. |
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Address |
[Lebrini, M.] CNRS 8172 UMR ECOFOG, Lab Mat & Mol Milieu Amazonien, Cayenne 97337, French Guiana, Email: florent.robert@guyane.univ-ag.fr |
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ELECTROCHEMICAL SCIENCE GROUP |
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ISSN |
1452-3981 |
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Notes |
ISI:000283999000015 |
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no |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
20 |
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Author |
Lebrini, M.; Robert, F.; Roos, C. |
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Title |
Alkaloids Extract from Palicourea guianensis Plant as Corrosion Inhibitor for C38 Steel in 1 M Hydrochloric Acid Medium |
Type |
Journal Article |
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Year |
2011 |
Publication |
International Journal of Electrochemical Science |
Abbreviated Journal |
Int. J. Electrochem. Sci. |
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Volume |
6 |
Issue |
3 |
Pages |
847-859 |
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Keywords |
Palicourea guianensis; corrosion inhibitors; C38 steel; acidic media; adsorption |
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Abstract |
Corrosion inhibition effect of alkaloids extract from Palicourea guianensis plant (AEPG) on C38 tell in 1 M HCl medium has been investigated by potentiodynamic polarization and electrochemical impedance spectroscopy. The polarization studies that AEPG acts as mixed-type inhibitor. The electrochemical impedance spectroscopy showed that the charge transfer resistance increases and the double layer capacitance decreases on increasing plant extract concentration. The inhibition efficiency of the extract obtained from impedance and polarization measurements was in a good agreement and was found to increase with increasing concentration of the extract. Inhibition efficiency of 89% was achieved with 100 mg L-1 of AEPG at 25 degrees C. The obtained results showed that, the Palicourea guianensis extract could serve as an effective inhibitor for the corrosion of steel in acid media. The adsorption of AEPG obeys the Langmuir adsorption isotherm. |
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Address |
[Lebrini, M.; Robert, F.; Roos, C.] UAG UMR ECOFOG, Lab Mat & Mol Milieu Amazonien, Cayenne 97337, French Guiana, Email: florent.robert@guyane.univ-ag.fr |
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Electrochemical Science Group |
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1452-3981 |
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Notes |
ISI:000287820500026 |
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no |
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Call Number |
EcoFoG @ webmaster @ |
Serial |
298 |
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Author |
Lebrini, M.; Robert, F.; Blandinieres, P.A.; Roos, C. |
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Title |
Corrosion Inhibition by Isertia coccinea Plant Extract in Hydrochloric Acid Solution |
Type |
Journal Article |
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Year |
2011 |
Publication |
International Journal of Electrochemical Science |
Abbreviated Journal |
Int. J. Electrochem. Sci. |
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Volume |
6 |
Issue |
7 |
Pages |
2443-2460 |
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Keywords |
Isertia coccinea; corrosion inhibitors; C38 steel; acidic media; adsorption |
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Abstract |
The effect of alkaloids extracted from Isertia coccinea plant (AEIC) on the corrosion of C38 steel in 1 M hydrochloric acid was investigated by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques. Potentiodynamic polarization curves indicated that the extract behave as mixed-type inhibitor. The experimental data obtained from EIS method show a frequency distribution and therefore a modelling element with frequency dispersion behaviour, a constant phase element (CPE) has been used. The inhibition efficiencies of the extract calculated by three methods show the same tendency. Inhibition was found to increase with increasing concentration of the plant extract. The results obtained show that the extract solution of the plant could serve as an effective inhibitor for the corrosion of C38 steel in hydrochloric acid solution. The apparent activation energy of the process taking place in inhibitor presence was determined on the ground of four temperature values in the range from 25 degrees C to 55 degrees C using the data obtained by two independent methods. Theoretical fitting of different isotherms, Langmuir, Temkin and Frunkin, were tested to clarify the nature of adsorption. |
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Address |
[Lebrini, M.; Robert, F.; Blandinieres, P. A.; Roos, C.] UAG UMR ECOFOG, Lab Mat & Mol Milieu Amazonien, Cayenne 97337, French Guiana, Email: florent.robert@guyane.univ-ag.fr |
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Electrochemical Science Group |
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1452-3981 |
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Notes |
ISI:000292331400014 |
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Call Number |
EcoFoG @ webmaster @ |
Serial |
324 |
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