| Records |
| Author |
Phillips, P.D.; de Azevedo, C.P.; Degen, B.; Thompson, I.S.; Silva, J.N.M.; van Gardingen, P.R. |
| Title |
An individual-based spatially explicit simulation model for strategic forest management planning in the eastern Amazon |
Type |
Journal Article |
Year  |
2004 |
Publication |
Ecological Modelling |
Abbreviated Journal |
Ecol. Model. |
| Volume |
173 |
Issue |
4 |
Pages |
335-354 |
| Keywords |
model; individual; tropical forest; tree; spatial; Brazil; Amazon; competition; species grouping; management; certification; regulation |
| Abstract |
A model to simulate the ecological processes of tree growth, mortality and recruitment, and the processes of forest management, in the terra firme forests of the eastern Amazon is described. It is implemented within the SYMFOR (http://www.symfor.org) framework. It is based on measurements of all trees that have a diameter greater than 5 cm from experimental plots in the Jari Cellulose and Tapajos National Forest areas over a 16-year period. Ten species groups are used to describe the natural processes affecting tree behaviour. Growth rates are calculated for each species group using the tree diameter and a competition index. Mortality and recruitment are simulated as stochastic processes. Recruitment probability is based on the predicted growth rate of a hypothetical tree. Options exist to vary the human interaction with the forest reflecting forest management decisions, as for other SYMFOR models. Model evaluation compares the performance of the model with data describing forest recovery for 16 years following logging. The model was applied to simulate current forest management practice in the Brazilian Amazon, with 40 m(3) ha(-1) of timber extracted with a cutting cycle of 30 years. Results show that yields are sustained for three harvests following the first logging of primary forest, but that the composition of timber moves towards lightwooded species rather than hardwooded. The predicted size of extracted trees decreases and the number of trees extracted increases with successive harvests, leading to a prediction of increased costs and lower profits for the logging company despite constant yields. The standing volume of all trees just before harvest is reduced by 15% over 150 years, with pioneer species becoming increasingly prevalent in the stand. The model, in the SYMFOR framework, can be used to help understand the differences between alternative forest management strategies in the Brazilian Amazon. Such knowledge is required to improve forest management, regulation and certification, and help to conserve the worlds largest remaining tropical forest. (C) 2003 Elsevier B.V. All rights reserved. |
| Address |
EMBRAPA Amazonia Oriental, BR-69011970 Manaus, Amazonas, Brazil, Email: Paul.Phillips@envams.co.uk |
| Corporate Author |
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Thesis |
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| Publisher |
ELSEVIER SCIENCE BV |
Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0304-3800 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
ISI:000220392200002 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
238 |
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| Author |
de Grandcourt, A.; Epron, D.; Montpied, P.; Louisanna, E.; Bereau, M.; Garbaye, J.; Guehl, J.M. |
| Title |
Contrasting responses to mycorrhizal inoculation and phosphorus availability in seedlings of two tropical rainforest tree species |
Type |
Journal Article |
| Year |
2004 |
Publication |
New Phytologist |
Abbreviated Journal |
New Phytol. |
| Volume |
161 |
Issue |
3 |
Pages |
865-875 |
| Keywords |
phosphorus; growth; efficiency; Paris-type arbuscular mycorrhizas; tropical rainforest; seedlings; Dicorynia guianensis; Eperua falcata |
| Abstract |
This work aimed at understanding the role of mycorrhizal status in phosphorus efficiency of tree seedlings in the tropical rainforest of French Guyana. Mycorrhizal colonization, growth, phosphorus content, net photosynthesis and root respiration were determined on three occasions during a 9-month growth period for seedlings of two co-occurring species (Dicorynia guianensis and Eperua falcata) grown at three soil phosphorus concentrations, with or without inoculation with arbuscular mycorrhizas. Seedlings of both species were unable to absorb phosphorus in the absence of mycorrhizal association. Mycorrhizal seedlings exhibited coils that are specific of Paris-type mycorrhizae. Both species benefited from the mycorrhizal symbiosis in terms of phosphorus acquisition but the growth of E. falcata seedlings was unresponsive to this mycorrhizal improvement of phosphorus status, probably because of the combination of high seed mass and P reserves, with low growth rate. The two species belong to two different functional groups regarding phosphorus acquisition, D. guianensis being an obligate mycotrophic species. |
| Address |
Univ Franche Comte, Lab Biol & Ecophysiol, F-25211 Montbeliard, France, Email: daniel.epron@scbiol.uhp-nancy.fr |
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Thesis |
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| Publisher |
BLACKWELL PUBLISHING LTD |
Place of Publication |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0028-646X |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
ISI:000188646500022 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
239 |
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| Author |
Dutech, C.; Joly, H.I.; Jarne, P. |
| Title |
Gene flow, historical population dynamics and genetic diversity within French Guianan populations of a rainforest tree species, Vouacapoua americana |
Type |
Journal Article |
| Year |
2004 |
Publication |
Heredity |
Abbreviated Journal |
Heredity |
| Volume |
92 |
Issue |
2 |
Pages |
69-77 |
| Keywords |
bottleneck; climatic change; extinction-recolonization; microsatellite; neotropical rainforest; pollen and seed dispersal |
| Abstract |
Both gene flow and historical events influence the genetic diversity of natural populations. One way to understand their respective impact is to analyze population genetic structure at large spatial scales. We studied the distribution of genetic diversity of 17 populations of Vouacapoua americana (Caesalpiniaceae) in French Guiana, using nine micro satellite loci. Low genetic diversity was observed within populations, with a mean allelic richness and gene diversity of 4.1 and 0.506, respectively, which could be due to low effective population size and/or past bottlenecks. Using the regression between F-st/(1-F-st), estimated between pairs of populations, and the logarithm of the geographical distance, the spatial genetic structure can partly be explained by isolation-by-distance and limited gene flow among populations. This result is in agreement with the species' biology, including seed and pollen dispersal by rodents and insects, respectively. In contrast, no clear genetic signal of historical events was found when examining genetic differentiation among populations in relation to biogeographical hypotheses or by testing for bottlenecks within populations. Our conclusion is that nuclear spatial genetic structure of V. americana, at the geographic scale of French Guiana, is better explained by gene flow rather than by historical events. |
| Address |
Cirad Foret Silvolab, Lab Genet & Ecol Mol, F-97387 Kourou, France, Email: cdutech@bordeaux.inra.fr |
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Thesis |
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| Publisher |
NATURE PUBLISHING GROUP |
Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0018-067X |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
ISI:000188431700003 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
240 |
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| Author |
Scotti-Saintagne, C.; Mariette, S.; Porth, I.; Goicoechea, P.G.; Barreneche, T.; Bodenes, K.; Burg, K.; Kremer, A. |
| Title |
Genome scanning for interspecific differentiation between two closely related oak species [Quercus robur L. and Q petraea (Matt.) Liebl.] |
Type |
Journal Article |
| Year |
2004 |
Publication |
Genetics |
Abbreviated Journal |
Genetics |
| Volume |
168 |
Issue |
3 |
Pages |
1615-1626 |
| Keywords |
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| Abstract |
Interspecific differentiation values (G(ST)) between two closely related oak species (Quercus petraea and Q. robur) were compiled across different studies with the aim to explore the distribution of differentiation at the genome level. The study was based on a total set of 389 markers (isozymes, AFLPs, SCARs, microsatellites, and SNPs) for which allelic frequencies were estimated in pairs of populations sampled throughout the sympatric distribution of the two species. The overall distribution of GST values followed an L-shaped curve with most markers exhibiting low species differentiation (G(ST) < 0.01) and only a few loci reaching >10% levels. Twelve percent of the loci exhibited significant G(ST) deviations to neutral expectations, suggesting that selection contributed to species divergence. Coding regions expressed higher differentiation than noncoding regions. Among the 389 markers, 158 could be mapped on the 12 linkage groups of the existing Q. robur genetic map. Outlier loci with large G, values were distributed over 9 linkage groups. One cluster of three outlier loci was found within 0.51 cM; but significant autocorrelation of GST was observed at distances <2 cM. The size and distribution of genomic regions involved in species divergence are discussed in reference to hitchhiking effects and disruptive selection. |
| Address |
INRA, UMR Biodivers Genes & Ecosyst, F-33612 Cestas, France, Email: kremer@pierronton.inra.fr |
| Corporate Author |
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Thesis |
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| Publisher |
GENETICS |
Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0016-6731 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
ISI:000225767400041 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
258 |
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| Author |
Degen, B.; Bandou, E.; Caron, H. |
| Title |
Limited pollen dispersal and biparental inbreeding in Symphonia globulifera in French Guiana |
Type |
Journal Article |
| Year |
2004 |
Publication |
Heredity |
Abbreviated Journal |
Heredity |
| Volume |
93 |
Issue |
6 |
Pages |
585-591 |
| Keywords |
gene flow; microsatellites; mixed mating; spatial autocorrelation; tropical tree; twogener |
| Abstract |
In this paper, we report a study of the mating system and gene flow of Symphonia globulifera, a hermaphroditic, mainly bird-pollinated tree species with a large geographic distribution in the tropical Americas and Africa. Using three microsatellites, we analysed 534 seeds of 28 open pollinated families and 164 adults at the experimental site 'Paracou' in French Guiana. We observed, compared to other tropical tree species, relatively high values for the effective number of alleles. Significant spatial genetic structure was detected, with trees at distances up to 150 m more genetically similar than expected at random. We estimated parameters of the mating system and gene flow by using the mixed mating model and the TwoGener approach. The estimated multilocus outcrossing rate, t(m), was 0.920. A significant level of biparental inbreeding and a high proportion of full-sibs were estimated for the 28 seed arrays. We estimated mean pollen dispersal distances between 27 and 53 m according to the dispersal models used. Although the adult population density of S. globulifera in Paracou was relatively high, the joint estimation of pollen dispersal and density of reproductive trees gave effective density estimates of 1.6 and 1.3 trees/ha. The parameters of the mating system and gene flow are discussed in the context of spatial genetic and demographic structures, flowering phenology and pollinator composition and behaviour. |
| Address |
BFH, Inst Forest Genet & Forest Tree Breeding, D-22927 Grosshansdorf, Germany, Email: b.degen@holz.uni-hamburg.de |
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Thesis |
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| Publisher |
NATURE PUBLISHING GROUP |
Place of Publication |
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Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0018-067X |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
ISI:000225354800009 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
259 |
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| Author |
Scotti-Saintagne, C.; Bodenes, C.; Barreneche, T.; Bertocchi, E.; Plomion, C.; Kremer, A. |
| Title |
Detection of quantitative trait loci controlling bud burst and height growth in Quercus robur L |
Type |
Journal Article |
| Year |
2004 |
Publication |
Theoretical and Applied Genetics |
Abbreviated Journal |
Theor. Appl. Genet. |
| Volume |
109 |
Issue |
8 |
Pages |
1648-1659 |
| Keywords |
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| Abstract |
Genetic variation of bud burst and early growth components was estimated in a full-sib family of Quercus robur L. comprising 278 offspring. The full sibs were vegetatively propagated, and phenotypic assessments were made in three field tests. This two-generation pedigree was also used to construct a genetic linkage map (12 linkage groups, 128 markers) and locate quantitative trait loci (QTLs) controlling bud burst and growth components. In each field test, the date of bud burst extended over a period of 20 days from the earliest to the latest clone. Bud burst exhibited higher heritability (0.15-0.51) than growth components (0.04-0.23) and also higher correlations across field tests. Over the three tests there were 32 independent detected QTLs (Pless than or equal to5% at the chromosome level) controlling bud burst, which likely represent at least 12 unique genes or chromosomal regions controlling this trait. QTLs explained from 3% to 11% of the variance of the clonal means. The number of QTLs controlling height growth components was lower and varied between two and four. However the contribution of each QTL to the variance of the clonal mean was higher (from 4% to 19%). These results indicate that the genetic architecture of two important fitness-related traits are quite different. On the one hand, bud burst is controlled by several QTLs with rather low to moderate effects, but contributing to a high genetic (additive) variance. On the other hand, height growth depends on fewer QTLs with moderate to strong effects, resulting in lower heritabilities of the trait. |
| Address |
INRA, UMR Biodivers Genes & Ecosyst, F-33612 Cestas, France, Email: antoine.kremer@pierroton.inra.fr |
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Thesis |
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| Publisher |
SPRINGER |
Place of Publication |
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Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0040-5752 |
ISBN |
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Medium |
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| Area |
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Conference |
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| Notes |
ISI:000225054800012 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
260 |
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| Author |
Rahali, H.; Ghanem, N.; Griffe, L.; Rahali, R.; Stien, D. |
| Title |
A general approach to the quantification of resin-bound functional groups by NMR |
Type |
Journal Article |
| Year |
2004 |
Publication |
New Journal of Chemistry |
Abbreviated Journal |
New J. Chem. |
| Volume |
28 |
Issue |
11 |
Pages |
1344-1346 |
| Keywords |
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| Abstract |
There has been a continuing need for sensitive, accurate and rapid methods to monitor functional loading of insoluble supports for solid phase synthesis. The present articles reports our findings regarding functional group loading quantification using H-1 NMR. Results obtained for supported amino, hydroxyl and NH-Fmoc groups are in agreement with those calculated using well-established methods and demonstrate that the strategy of looking, either at the excess reagent left in solution (NH2 and OH), or at the protecting group derivatives released from the polymer (Fmoc), is a viable approach to resin loading quanti. cation. |
| Address |
Univ Montpellier 2, CNRS, UMR 5810, Lab Aminoacides Peptides & Prot, F-34095 Montpellier 05, France, Email: didier.stien@guyane.cnrs.fr |
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| Publisher |
ROYAL SOC CHEMISTRY |
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Series Issue |
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Edition |
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| ISSN |
1144-0546 |
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Conference |
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| Notes |
ISI:000224894700013 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
261 |
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| Author |
Amusant, N.; Beauchene, J.; Fournier, M.; Janin, G.; Thevenon, M.F. |
| Title |
Decay resistance in Dicorynia guianensis Amsh.: analysis of inter-tree and intra-tree variability and relations with wood colour |
Type |
Journal Article |
| Year |
2004 |
Publication |
Annals of Forest Science |
Abbreviated Journal |
Ann. For. Sci. |
| Volume |
61 |
Issue |
4 |
Pages |
373-380 |
| Keywords |
Dicorynia guianensis; Amazonian wood; wood colour/decay resistance; heartwood; variability |
| Abstract |
Dicorynia guianensis Amsh. is very widespread in the forests of French Guiana and moreover is the leading species harvested in this area, but its main defect remains the great variability of wood durability, especially with respect to fungal decay. The aim of this work was to study this inter- and intra-tree variability in order to identify the parameters responsible for this variation (growth area, height and radial position) within the tree. The resistance decrease from the outer heartwood to the pith. Measurement of colour variation using the CIELAB (L*, a*, b*, C*, h*) system was performed at the intra-tree level to highlight the longitudinal and radial gradients of variation. Dicorynia guianensis becomes less red and dark from the outer to the inner heartwood and from the base to the top. Lastly, variations of colour and durability were correlated: the wood is less resistant the redder and darker it is. |
| Address |
CIRAD Foret, Forest Prod Programme, F-34398 Montpellier 5, France, Email: nadine.amusant@cirad.fr |
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Thesis |
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| Publisher |
E D P SCIENCES |
Place of Publication |
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Summary Language |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
1286-4560 |
ISBN |
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Medium |
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Expedition |
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Conference |
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| Notes |
ISI:000223955500009 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
262 |
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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 |
| Keywords |
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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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Thesis |
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| Publisher |
AMER CHEMICAL SOC |
Place of Publication |
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Summary Language |
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Series Issue |
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Edition |
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| ISSN |
0022-3263 |
ISBN |
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Medium |
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Expedition |
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Conference |
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| Notes |
ISI:000222187200022 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
263 |
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| Author |
Degen, B.; Roubilk, D.W. |
| Title |
Effects of animal pollination on pollen dispersal, selfing, and effective population size of tropical trees: A simulation study |
Type |
Journal Article |
| Year |
2004 |
Publication |
Biotropica |
Abbreviated Journal |
Biotropica |
| Volume |
36 |
Issue |
2 |
Pages |
165-179 |
| Keywords |
Amazon; bees; Brazil; Dipteryx; Jacaranda; model; pollination; sensitivity analysis; trees |
| Abstract |
Animals, especially insects, are principal pollen vectors of tropical trees and have behavior patterns that affect gene dispersal. Here, we explore complex pollination systems using a new simulation model Eco-Gene and considering, among other factors, flowering synchrony. spatial distribution of trees, degree of selfing, population densities, pollinator flight distances, pollen deposition, and pollinator response to floral display size. Sensitivity analyses using two contrasting tree data sets (Jacaranda copaia and Dipteryx odorata) determined the importance of each parameter on three response variables: the proportion of seeds from self-pollination, effective population size, and pollen dispersal. Spatial considerations and attractiveness of floral displays were prominent features determining the population genetic result of pollinators, and some biological implications of the results are discussed. |
| Address |
INRA, Kourou 97387, French Guiana, Email: degen_b@kourou.cirad.fr |
| Corporate Author |
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Thesis |
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| Publisher |
ASSOC TROPICAL BIOLOGY INC |
Place of Publication |
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Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0006-3606 |
ISBN |
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Medium |
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Expedition |
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Conference |
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| Notes |
ISI:000222092900006 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
264 |
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