| Records |
| Author |
Melieres, M.A.; Pourchet, M.; Charles-Dominique, P.; Gaucher, P. |
| Title |
Mercury in canopy leaves of French Guiana in remote areas |
Type |
Journal Article |
| Year |
2003 |
Publication |
Science of the Total Environment |
Abbreviated Journal |
Sci. Total Environ. |
| Volume |
311 |
Issue |
1-3 |
Pages |
261-267 |
| Keywords |
mercury; canopy; rainforest; Hg atmosphere soil transfer |
| Abstract |
A study of total Hg concentration in the foliage of the canopy was carried out in two remote areas in French Guiana. The sampled canopy is representative of the French Guiana canopy. The concentration in the foliage, 64+/-14 ng g(-1) (dry wt.), is used to estimate the annual input of total Hg to the soil through the litterfall, found to be 45+/-10 mug m(-2) y(-1). As translocation is negligible, mercury in the canopy originates mainly from atmospheric uptake by the leaves and this litterfall deposit represents a direct atmospheric input from the background atmospheric load into the soil. (C) 2003 Elsevier Science B.V. All rights reserved. |
| Address |
Univ Grenoble 1, CNRS, Lab Glaciol & Geophys Environm, F-38402 St Martin Dheres, France, Email: melieres@glaciog.ujf-grenobic.fr |
| Corporate Author |
|
Thesis |
|
| Publisher |
ELSEVIER SCIENCE BV |
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0048-9697 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
Notes  |
ISI:000184091300019 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
271 |
| Permanent link to this record |
| |
|
| |
| Author |
Clair, B.; Arinero, R.; Leveque, G.; Ramonda, M.; Thibaut, B. |
| Title |
Imaging the mechanical properties of wood cell wall layers by atomic force modulation microscopy |
Type |
Journal Article |
| Year |
2003 |
Publication |
IAWA Journal |
Abbreviated Journal |
IAWA J. |
| Volume |
24 |
Issue |
3 |
Pages |
223-230 |
| Keywords |
wood; cell wall; mechanical properties; elastic modulus; tension wood |
| Abstract |
Atomic Force Microscopy in force modulation mode was used to study the elastic properties of the different fibre wall layers of the tension wood of holm oak and normal wood of boco. The method is based on the measurement of the resonance frequency of the microscope lever in contact with the sample. This frequency is related to the reduced Young modulus E* = E/(1-nu(2)) of the material, supposed to be isotropic. 'Elastic' images of the cell are obtained simultaneously with the topographic images, which allows the observation of the mechanical properties of the cells at a nanometric scale. Layers G, S-1, S-2 and ML can clearly be distinguished. By comparison with known materials an estimation of the absolute modulus is given in the range 5-20 GPa, but should be considered with caution, because the inherent anisotropy of the materials has not been taken into account. |
| Address |
Univ Montpellier 2, CNRS, UMR 5508, Lab Mecan & Genie Civil, F-34095 Montpellier, France |
| Corporate Author |
|
Thesis |
|
| Publisher |
INT ASSOC WOOD ANATOMISTS |
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0928-1541 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
ISI:000185049700003 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
270 |
| Permanent link to this record |
| |
|
| |
| Author |
Clair, B.; Fournier, M.; Prevost, M.F.; Beauchene, J.; Bardet, S. |
| Title |
Biomechanics of buttressed trees: Bending strains and stresses |
Type |
Journal Article |
| Year |
2003 |
Publication |
American Journal of Botany |
Abbreviated Journal |
Am. J. Bot. |
| Volume |
90 |
Issue |
9 |
Pages |
1349-1356 |
| Keywords |
biomechanics; buttress; Eleaocarpaceae; French Guiana; Sloanea spp.; tropical trees; wood |
| Abstract |
The different hypotheses about buttress function and formation mainly involve mechanical theory. Forces were applied to two trees of Sloanea spp.. a tropical genus that develops typical thin buttresses. and the three-dimensional strains were measured at different parts of the trunk base. Risks of failure were greater on the buttress sides, where shear and tangential stresses are greater, not on the ridges. in spite of high longitudinal (parallel to the grain) stresses. A simple beam model, computed from the second moment of area of digitized cross sections, is consistent with longitudinal strain variations but cannot predict accurately variations with height. Patterns of longitudinal strain variation along ridges are very different in the two individuals, owing to a pronounced lateral curvature in one specimen. The constant stress hypothesis is discussed based on these results. Without chronological data during the development of the tree. it cannot be proved that buttress formation is activated by stress or strain. |
| Address |
CIRAD ENGREF INRA, UMR Ecol Forets Guyane, F-97310 Kourou, Guyane Francais, France |
| Corporate Author |
|
Thesis |
|
| Publisher |
BOTANICAL SOC AMER INC |
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0002-9122 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
ISI:000185459000010 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
244 |
| Permanent link to this record |
| |
|
| |
| Author |
Marcon, E.; Puech, F. |
| Title |
Evaluating the geographic concentration of industries using distance-based methods |
Type |
Journal Article |
| Year |
2003 |
Publication |
Journal of Economic Geography |
Abbreviated Journal |
J. Econ. Geogr. |
| Volume |
3 |
Issue |
4 |
Pages |
409-428 |
| Keywords |
agglomeration; clustering; geographic concentration; location of firms |
| Abstract |
We propose new methods for evaluating the spatial distribution of firms. To assess whether firms are concentrated or dispersed, economists have traditionally used indices that analyse the heterogeneity of a spatial structure at a single geographic level. We introduce distance-based methods, Besag's L function (derived from Ripley's K function) and Diggle and Chetwynd's D function to describe simultaneously spatial distribution at different geographical scales. Our empirical applications consider the distribution of French manufacturing firms in the Paris area and in France generally. For some geographic levels, results show significant concentration or dispersion of firms according to their sector of activity. |
| Address |
ENGREF, Kourou 97310, French Guiana |
| Corporate Author |
|
Thesis |
|
| Publisher |
OXFORD UNIV PRESS |
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
1468-2702 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
ISI:000185742500004 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
269 |
| Permanent link to this record |
| |
|
| |
| Author |
Clair, B.; Jaouen, G.; Beauchene, J.; Fournier, M. |
| Title |
Mapping radial, tangential and longitudinal shrinkages and relation to tension wood in discs of the tropical tree Symphonia globulifera |
Type |
Journal Article |
| Year |
2003 |
Publication |
Holzforschung |
Abbreviated Journal |
Holzforschung |
| Volume |
57 |
Issue |
6 |
Pages |
665-671 |
| Keywords |
drying shrinkage; tension wood; Symphonia globulifera L. f. |
| Abstract |
A method for measuring shrinkage resulting from drying in the three anisotropic directions is developed and tested. Measurements are performed on sawn discs, a technique which simplifies preparation and enables large numbers of measurements. Shrinkage values can be represented as a map of the disc surface. The results indicate that comparisons between shrinkage distribution and tension wood distribution on the discs show a clear relationship and can be measured with relatively high accuracy in reference to the shrinkage map. In the long term, this method could be useful in the timber industry as a means for choosing the direction in which logs are cut depending on their type of wood composition. |
| Address |
CIRAD ENGREF INRA, UMR Ecol Forets Guyane, Kourou 97379, French Guiana |
| Corporate Author |
|
Thesis |
|
| Publisher |
WALTER DE GRUYTER & CO |
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0018-3830 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
ISI:000186257800016 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
243 |
| Permanent link to this record |
| |
|
| |
| Author |
Koponen, P.; Nygren, P.; Domenach, A.M.; Le Roux, C.; Saur, E.; Roggy, J.C. |
| Title |
Nodulation and dinitrogen fixation of legume trees in a tropical freshwater swamp forest in French Guiana |
Type |
Journal Article |
| Year |
2003 |
Publication |
Journal of Tropical Ecology |
Abbreviated Journal |
J. Trop. Ecol. |
| Volume |
19 |
Issue |
|
Pages |
655-666 |
| Keywords |
acetylene reduction assay; Bradyrhizobium; flooding; microtopography; N-15 natural abundance method; 16S rDNA sequencing |
| Abstract |
Nodulated legume trees comprised 43% of the stand basal area in the low, most frequently flooded microsites, and 23% in higher, drier microsites in a tropical freshwater swamp forest in French Guiana. Dinitrogen fixation in Pterocarpus officinalis, Hydrochorea corymbosa and Inga pilosula was confirmed by acetylene reduction assay (ARA), presence of leghaemoglobin in nodules and the N-15 natural abundance method. The results for Zygia cataractae were inconclusive but suggested N-2 fixation in drier microsites. Nodulated Inga disticha had a N-15-to-N-14 ratio similar to non-N-2-fixing trees, but ARA indicated nitrogenase activity and leghaemoglobin was present in nodules. All bacterial strains were identified as Bradyrhizobium spp. according to the partial 16S rDNA sequences, and they were infective in vitro in the model species Macroptilium atropurpuretan. About 35-50% of N in the leaves of P. officinalis, H. corymbosa and I. pilosula was fixed from the atmosphere. Dinitrogen fixation was estimated to contribute at least 8-13% and 1728% to whole-canopy N in high and low microsites, respectively. Symbiotic N, fixation appears to provide both a competitive advantage to legume trees under N-limited, flooded conditions and an important N input to neotropical freshwater swamp forests. |
| Address |
Univ Helsinki, Dept Forest Ecol, FIN-00014 Helsinki, Finland |
| Corporate Author |
|
Thesis |
|
| Publisher |
CAMBRIDGE UNIV PRESS |
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0266-4674 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
ISI:000186710800005 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
242 |
| Permanent link to this record |
| |
|
| |
| Author |
Yazdani, R.; Scotti, I.; Jansson, G.; Plomion, C.; Mathur, G. |
| Title |
Inheritance and diversity of simple sequence repeat (SSR) microsatellite markers in various families of Picea abies |
Type |
Journal Article |
| Year |
2003 |
Publication |
Hereditas |
Abbreviated Journal |
Hereditas |
| Volume |
138 |
Issue |
3 |
Pages |
219-227 |
| Keywords |
|
| Abstract |
A large number of sequence-specific SSRs were screened by using electrophoresis on metaphore agarose gels with the bands visualized by ethidium bromide staining. Many SSRs appeared as codominant and many as dominant markers, with presence or absence of bands. A simple Mendelian inheritance pattern for most codominant and dominant SSR loci was found. For many codominant SSR markers, null alleles were detected. The proportion of dominant microsatellites detected in this study (close to 50 %) was much higher than that commonly reported in many other studies. A high proportion of dominant markers together with a high frequency of codominant markers with null alleles may represent two important limitations for the use of microsatellites in different studies. On the other hand, many polymorphic codominant SSR microsatellite markers were found to be highly repeatable, and can be used for population studies, seed certification, quality control of controlled crosses, paternity analysis, pollen contamination, and mapping of QTL in related families. In this paper, we report on the inheritance pattern and diversity of codominant and dominant SSR microsatellites in seven families of Picea abies sharing a common mother. |
| Address |
Swedish Univ Agr Sci, Dept Plant Biol & Forest Genet, Uppsala, Sweden |
| Corporate Author |
|
Thesis |
|
| Publisher |
BLACKWELL MUNKSGAARD |
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0018-0661 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
ISI:000187074000010 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
268 |
| Permanent link to this record |
| |
|
| |
| Author |
Scotti-Saintagne, C.; Bodenes, C.; Barreneche, T.; Pot, D.; Plomion, C.; Kremer, A. |
| Title |
Distribution of genomic regions differentiating oak species assessed by QTL detection |
Type |
Journal Article |
| Year |
2004 |
Publication |
Heredity |
Abbreviated Journal |
Heredity |
| Volume |
92 |
Issue |
1 |
Pages |
20-30 |
| Keywords |
QTL; leaf morphology; repeatability; genetic map; Q. robur |
| Abstract |
Pedunculate oak and sessile oak are two sympatric inter-fertile species that exhibit leaf morphological differences. We aimed to detect quantitative trait loci (QTLs) of these traits in order to locate genomic regions involved in species differentiation. A total of 15 leaf morphological traits were assessed in a mixed forest stand composed of Quercus petraea and Q. robur and in a full-sib pedigree of Q. robur. The progeny of the full-sib family were vegetatively propagated in two successive experiments comprising 174 and 216 sibs, and assessments were made on two leaves collected on each of the 1080 and 1530 cuttings corresponding to the two experiments. Traits that exhibited strong species differences in the mixed stand tended also to have higher repeatability values in the mapping population, thus indicating higher genetic control. A genetic map was constructed for QTL detection. Composite interval mapping with the one QTL model was used for QTL detection. From one to three QTLs were detected for 13 traits. In-depth analysis of the QTLs, controlling the five morphological traits that exhibited the highest interspecific differences in the mixed stand, indicated that they were distributed on six linkage groups, with two clusters comprising QTLs of at least two discriminant traits. These results were reinforced when error 1 for QTL detection was set at 5% at the chromosome level, as up to nine clusters could be identified. In conclusion, traits involved in interspecific differentiation of oaks are under polygenic control and widespread in clusters across the genome. |
| Address |
INRA, UMR Biodivers Genes & Ecosyst, F-33612 Cestas, France |
| Corporate Author |
|
Thesis |
|
| Publisher |
NATURE PUBLISHING GROUP |
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0018-067X |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
ISI:000187216300005 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
267 |
| Permanent link to this record |
| |
|
| |
| Author |
Gond, V.; Bartholome, E.; Ouattara, F.; Nonguierma, A.; Bado, L. |
| Title |
Monitoring and mapping of waters and wetlands in arid regions using the SPOT-4 VEGETATION imaging system |
Type |
Journal Article |
| Year |
2004 |
Publication |
International Journal of Remote Sensing |
Abbreviated Journal |
Int. J. Remote Sens. |
| Volume |
25 |
Issue |
5 |
Pages |
987-1004 |
| Keywords |
|
| Abstract |
Monitoring the state of small waterbodies and wetlands is very useful in dry regions, because their existence is entirely controlled by the rhythm of local rainfall. On VEGETATION image colour composites, waterbodies and marshy vegetation show up clearly. Yet simple image classification does not yield sufficiently good results because 'spectral signatures' vary significantly together with the ecological conditions of these surfaces. A robust contextual procedure taking into account local contrast was successfully developed and tested. A systematic validation was carried out and a map of waterbodies and wetlands was produced for Burkina Faso and neighbouring regions. |
| Address |
Ctr Commun Rech, I-21020 Ispra, VA, Italy, Email: valery.gond@cirad.fr |
| Corporate Author |
|
Thesis |
|
| Publisher |
TAYLOR & FRANCIS LTD |
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0143-1161 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
ISI:000187996500007 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
266 |
| Permanent link to this record |
| |
|
| |
| Author |
Dutech, C.; Maggia, L.; Tardy, C.; Joly, H.I.; Jarne, P. |
| Title |
Tracking a genetic signal of extinction-recolonization events in a neotropical tree species: Vouacapoua americana aublet in french guiana |
Type |
Journal Article |
| Year |
2003 |
Publication |
Evolution |
Abbreviated Journal |
Evolution |
| Volume |
57 |
Issue |
12 |
Pages |
2753-2764 |
| Keywords |
allelic richness; caesalpinioideae; chloroplast DNA; climatic changes; cytonuclear disequilibrium; legummosae; microsatellite loci; tropical rainforest |
| Abstract |
Drier periods from the late Pleistocene and early Holocene have been hypothesized to have caused the disappearance of various rainforest species over large geographical areas in South America and restricted the extant populations to mesic sites. Subsequent improvement in climatic conditions has been associated with recolonization. Changes in population size associated with these extinction-recolonization events should have affected genetic diversity within species. However, these historical hypotheses and their genetic consequences have rarely been tested in South America. Here, we examine the diversity of the chloroplast and nuclear genomes in a Neotropical rainforest tree species, Vouacapoua americana (Leguminosae, Caesalpinioideae) in French Guiana. The chloroplast diversity was analyzed using a polymerase chain reaction-restriction fragment length polymorphism method (six pairs of primers) in 29 populations distributed over most of French Guiana, and a subset of 17 populations was also analyzed at nine polymorphic microsatellite loci. To determine whether this species has experienced extinction-recolonization, we sampled populations in areas supposedly not or only slightly affected by climatic changes, where the populations would not have experienced frequent extinction, and in areas that appear to have been recently recolonized. In the putatively recolonized areas, we found patches of several thousands of hectares homogeneous for chloroplast variation that can be interpreted as the effect of recolonization processes from several geographical origins. In addition, we observed that, for both chloroplast and nuclear genomes, the populations in newly recolonized areas exhibited a significantly smaller allelic richness than others. Controlling for geographic distance, we also detected a significant correlation between chloroplast and nuclear population differentiation. This result indicates a cytonuclear disequilibrium that can be interpreted as a historical signal of a genetic divergence between fragmented populations. In conclusion, the spatial genetic structure of contemporary V. americana populations shows evidence that this species has experienced large extinction-recolonization events, which were possibly caused by past climatic change. |
| Address |
CIRAD Foret, Silvolab, Ecol Mol, F-97387 Kourou, France, Email: laruent.maggia@cirad.fr |
| Corporate Author |
|
Thesis |
|
| Publisher |
SOC STUDY EVOLUTION |
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0014-3820 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
ISI:000188061800007 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
241 |
| Permanent link to this record |
