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Groc, S.; Orivel, J.; Dejean, A.; Martin, J.M.; Etienne, M.P.; Corbara, B.; Delabie, J.H.C. |
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Title |
Baseline study of the leaf-litter ant fauna in a French Guianese forest |
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Journal Article |
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Year |
2009 |
Publication |
Insect Conservation and Diversity |
Abbreviated Journal |
Insect. Conserv. Divers. |
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2 |
Issue |
3 |
Pages |
183-193 |
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Ants of the Leaf Litter Protocol; baseline study; leaf-litter ants; Nouragues; Winkler method |
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Abstract |
1. Leaf-litter ants represent a major component of biodiversity and are excellent bioindicators reflecting the health of terrestrial ecosystems. This study, conducted in an unspoiled forest near the Nouragues Research Station, represents the first inventory of leaf-litter ant diversity conducted in French Guiana, and so can be considered as the baseline dataset for ants in this country. 2. Ants were extracted from the leaf-litter using the Ants of the Leaf Litter Protocol, along an altitudinal gradient at four forest sites, including an inselberg. 3. A total of 196 ant species representing 46 genera distributed over eight subfamilies were collected. Four distinct communities spread over a gradient of diversity were thus identified: the liana forest was the most species-rich (140 species) followed by the forested plateau (102 species), the transition forest (87 species) and the forest at the top of the inselberg (71 species). 4. The discovery of species new to science plus several species recorded for the first time in French Guiana, coupled with the particular context of this area, suggests that the Nouragues Research Station might represent a centre of endemism. Once completed, this leaf-litter ant dataset will contribute greatly to the knowledge of ant biodiversity in French Guiana, and has the potential to progressively become an indispensable tool for country-wide conservation planning programmes. |
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[Groc, Sarah; Dejean, Alain; Martin, Jean-Michel] CNRS, Ecol Forets Guyane UMR 8172, Kourou, France, Email: sarah.groc@ecofog.gf |
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WILEY-LISS |
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1752-458X |
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ISI:000268269400004 |
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EcoFoG @ eric.marcon @ |
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108 |
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Ruelle, J.; Yamamoto, H.; Thibaut, B. |
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Title |
Growth Stresses and Cellulose Structural Parameters in Tension and Normal Wood from Three Tropical Rainforest Angiosperm Species |
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Journal Article |
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Year |
2007 |
Publication |
BioResources |
Abbreviated Journal |
BioResources |
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2 |
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2 |
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235-251 |
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Cellulose; Microfibril angle; Crystallite size; Tension wood; Tropical rainforest; Growth stresses |
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Few studies have been conducted about relation between cellulose parameters and biomechanical properties of wood in tropical angiosperms species. For this purpose, on 13 trees from 3 species of French Guyana tropical rainforest in a clear active process of restoring verticality, i) growth strains were measured in situ in order to determine the occurrence of tension wood within samples and ii) cellulose structural parameters were estimated on all the samples using X-ray diffraction method. Crystallite size was estimated from the full-width at half-maximum of the Miller index (002) arc diffraction and angle T was measured following Cave's method. Relationships between these parameters and growth stresses were good and the variations between normal and tension wood were significant, i. e. a lower angle T and a larger crystallite size in tension wood. In order to have a good estimation of the microfibril angle in the main layer of the secondary wall for each species, an experimental calibration was done between angle T and microfibril angle observed with scanning electron microscopy. |
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[Ruelle, Julien; Thibaut, Bernard] UMR EcoFoG, Kourou 97387, Guyana, Email: ruelle_j@kourou.cirad.fr |
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NORTH CAROLINA STATE UNIV DEPT WOOD & PAPER SCI |
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1930-2126 |
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ISI:000263689300009 |
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EcoFoG @ eric.marcon @ |
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122 |
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Vedel, V.; Arthur, W. |
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Character changes during the early post-embryonic development of the centipede Strigamia maritima (Leach, 1817) (Chilopoda: Geophilomorpha) |
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Journal Article |
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Year |
2009 |
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International Journal of Myriapodology |
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2 |
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1 |
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53-61 |
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MOULT DEVELOPMENT ARTHROPOD POST-EMBRYONIC STAGE MORPHOLOGICAL CHANGE MYRIAPOD CENTIPEDE EVO-DEVO |
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For many kinds of ecological, evolutionary and developmental study, it is important to be able to describe the life-history of the individuals of a particular species/population. In the case of myriapods and other arthropods, this involves separating the different life-history stages (or stadia or instars) that are separated by moults. However, it has recently been pointed out that in the earliest post-embryonic stages the cuticle is still quite flexible; this means that visible external developmental changes can occur between moults as well as during them. Here, we provide evidence for such inter-moult changes in the coastal geophilomorph centipede Strigamia maritima. The character states studied enable finer-scale resolution of early post-embryonic forms than was hitherto possible. Specifically, we describe five transitional forms during a period in which just two (Peripatoid and Foetus) have traditionally been recognized |
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Character changes during the early post-embryonic development of the centipede Strigamia maritima (Leach, 1817) (Chilopoda: Geophilomorpha); doi:10.1163/187525409X462412 |
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EcoFoG @ eric.marcon @ 13 |
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187 |
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Vedel, V.; Lalague, H. |
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Standardized sampling protocol for spider community assessment in the Neotropical rainforest |
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Journal Article |
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2013 |
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Journal of Entomology and Zoology Studies |
Abbreviated Journal |
J. Entomol. Zool. Stud. |
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2 |
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1 |
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18-34 |
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Araneae; Biodiversity; French Guiana; Guianese Shield; Impact Assessment |
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We described, here, a standardized protocol to collect the maximum number of spiders per unit of effort from the different strata of a tropical forestry habitat. This would allow quantifying the richness of a site and would allow spatial and temporal comparisons between sites. This protocol was tested and applied in a pilot study at four sites representing three different forestry habitats of the natural reserve of La Trinité (French Guiana). Results showed every feeding guild was well represented and most of the 30 families found are represented by several individuals. Indices of species richness, number of singletons, species richness estimators from the accumulation curves and diversity and similarity indices were also calculated and all indicated that La Trinité is a rich and diverse site for spiders. The standardized protocol showed here its efficiency and its wide cover of micro-habitats and is, therefore, recommended for any impact assessment or diversity of spider study in tropical forestry environment. |
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EcoFoG @ webmaster @ |
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487 |
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Author |
Vedel, V.; Rheims, C.; Murienne, J.; Brescovit, A.D. |
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Title |
Biodiversity baseline of the French Guiana spider fauna |
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Journal Article |
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2013 |
Publication |
SpringerPlus |
Abbreviated Journal |
SpringerPlus |
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2 |
Issue |
1 |
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1-19 |
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Arachnids; Araneae; Bio monitoring; French Guiana; Neotropics; Species richness |
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The need for an updated list of spiders found in French Guiana rose recently due to many upcoming studies planned. In this paper, we list spiders from French Guiana from existing literature (with corrected nomenclature when necessary) and from 2142 spiders sampled in 12 sites for this baseline study. Three hundred and sixty four validated species names of spider were found in the literature and previous authors' works. Additional sampling, conducted for this study added another 89 identified species and 62 other species with only a genus name for now. The total species of spiders sampled in French Guiana is currently 515. Many other Morphospecies were found but not described as species yet. An accumulation curve was drawn with seven of the sampling sites and shows no plateau yet. Therefore, the number of species inhabiting French Guiana cannot yet be determined. As the very large number of singletons found in the collected materials suggests, the accumulation curve indicates nevertheless that more sampling is necessary to discover the many unknown spider species living in French Guiana, with a focus on specific periods (dry season and wet season) and on specific and poorly studied habitats such as canopy, inselberg and cambrouze (local bamboo monospecific forest). © 2013 Vedel et al. |
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CNRS, EFA, UMR 5174 EDB (Laboratoire Evolution et Diversité Biologique), Université Paul Sabatier, 118 route de Narbonne, F-31062 Toulouse, France |
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21931801 (Issn) |
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Export Date: 25 November 2013; Source: Scopus; doi: 10.1186/2193-1801-2-361; Language of Original Document: English; Correspondence Address: Vedel, V.; Laboratoire d'entomologie Entobios, 5 Bis rue François Thomas, 97310 Kourou, Guyane Française, France; email: vincent.vedel@ecofog.gf |
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EcoFoG @ webmaster @ |
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510 |
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Craine, J.M.; Elmore, A.J.; Wang, L.; Aranibar, J.; Bauters, M.; Boeckx, P.; Crowley, B.E.; Dawes, M.A.; Delzon, S.; Fajardo, A.; Fang, Y.; Fujiyoshi, L.; Gray, A.; Guerrieri, R.; Gundale, M.J.; Hawke, D.J.; Hietz, P.; Jonard, M.; Kearsley, E.; Kenzo, T.; Makarov, M.; Marañón-Jiménez, S.; McGlynn, T.P.; McNeil, B.E.; Mosher, S.G.; Nelson, D.M.; Peri, P.L.; Roggy, J.C.; Sanders-DeMott, R.; Song, M.; Szpak, P.; Templer, P.H.; Van der Colff, D.; Werner, C.; Xu, X.; Yang, Y.; Yu, G.; Zmudczyńska-Skarbek, K. |
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Title |
Isotopic evidence for oligotrophication of terrestrial ecosystems |
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Journal Article |
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2018 |
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Nature Ecology & Evolution |
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2 |
Issue |
11 |
Pages |
1735-1744 |
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Human societies depend on an Earth system that operates within a constrained range of nutrient availability, yet the recent trajectory of terrestrial nitrogen (N) availability is uncertain. Examining patterns of foliar N concentrations and isotope ratios (delta15N) from more than 43,000 samples acquired over 37 years, here we show that foliar N concentration declined by 9% and foliar delta15N declined by 0.6–1.6 per thousand. Examining patterns across different climate spaces, foliar delta15N declined across the entire range of mean annual temperature and mean annual precipitation tested. These results suggest declines in N supply relative to plant demand at the global scale. In all, there are now multiple lines of evidence of declining N availability in many unfertilized terrestrial ecosystems, including declines in delta15N of tree rings and leaves from herbarium samples over the past 75–150 years. These patterns are consistent with the proposed consequences of elevated atmospheric carbon dioxide and longer growing seasons. These declines will limit future terrestrial carbon uptake and increase nutritional stress for herbivores. |
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2397-334x |
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EcoFoG @ webmaster @ Craine2018 |
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827 |
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Bruelheide, H.; Dengler, J.; Purschke, O.; Lenoir, J.; Jiménez-Alfaro, B.; Hennekens, S.M.; Botta-Dukát, Z.; Chytrý, M.; Field, R.; Jansen, F.; Kattge, J.; Pillar, V.D.; Schrodt, F.; Mahecha, M.D.; Peet, R.K.; Sandel, B.; van Bodegom, P.; Altman, J.; Alvarez-Dávila, E.; Arfin Khan, M.A.S.; Attorre, F.; Aubin, I.; Baraloto, C.; Barroso, J.G.; Bauters, M.; Bergmeier, E.; Biurrun, I.; Bjorkman, A.D.; Blonder, B.; Čarni, A.; Cayuela, L.; Černý, T.; Cornelissen, J.H.C.; Craven, D.; Dainese, M.; Derroire, G.; De Sanctis, M.; Díaz, S.; Doležal, J.; Farfan-Rios, W.; Feldpausch, T.R.; Fenton, N.J.; Garnier, E.; Guerin, G.R.; Gutiérrez, A.G.; Haider, S.; Hattab, T.; Henry, G.; Hérault, B.; Higuchi, P.; Hölzel, N.; Homeier, J.; Jentsch, A.; Jürgens, N.; Kącki, Z.; Karger, D.N.; Kessler, M.; Kleyer, M.; Knollová, I.; Korolyuk, A.Y.; Kühn, I.; Laughlin, D.C.; Lens, F.; Loos, J.; Louault, F.; Lyubenova, M.I.; Malhi, Y.; Marcenò, C.; Mencuccini, M.; Müller, J.V.; Munzinger, J.; Myers-Smith, I.H.; Neill, D.A.; Niinemets, Ü.; Orwin, K.H.; Ozinga, W.A.; Penuelas, J.; Pérez-Haase, A.; Petřík, P.; Phillips, O.L.; Pärtel, M.; Reich, P.B.; Römermann, C.; Rodrigues, A.V.; Sabatini, F.M.; Sardans, J.; Schmidt, M.; Seidler, G.; Silva Espejo, J.E.; Silveira, M.; Smyth, A.; Sporbert, M.; Svenning, J.-C.; Tang, Z.; Thomas, R.; Tsiripidis, I.; Vassilev, K.; Violle, C.; Virtanen, R.; Weiher, E.; Welk, E.; Wesche, K.; Winter, M.; Wirth, C.; Jandt, U. |
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Title |
Global trait–environment relationships of plant communities |
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Journal Article |
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2018 |
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Nature Ecology & Evolution |
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2 |
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12 |
Pages |
1906-1917 |
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Plant functional traits directly affect ecosystem functions. At the species level, trait combinations depend on trade-offs representing different ecological strategies, but at the community level trait combinations are expected to be decoupled from these trade-offs because different strategies can facilitate co-existence within communities. A key question is to what extent community-level trait composition is globally filtered and how well it is related to global versus local environmental drivers. Here, we perform a global, plot-level analysis of trait–environment relationships, using a database with more than 1.1 million vegetation plots and 26,632 plant species with trait information. Although we found a strong filtering of 17 functional traits, similar climate and soil conditions support communities differing greatly in mean trait values. The two main community trait axes that capture half of the global trait variation (plant stature and resource acquisitiveness) reflect the trade-offs at the species level but are weakly associated with climate and soil conditions at the global scale. Similarly, within-plot trait variation does not vary systematically with macro-environment. Our results indicate that, at fine spatial grain, macro-environmental drivers are much less important for functional trait composition than has been assumed from floristic analyses restricted to co-occurrence in large grid cells. Instead, trait combinations seem to be predominantly filtered by local-scale factors such as disturbance, fine-scale soil conditions, niche partitioning and biotic interactions. |
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2397-334x |
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EcoFoG @ webmaster @ Bruelheide2018 |
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844 |
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Foucaud, J.; Orivel, J.; Loiseau, A.; Delabie, J.H.C.; Jourdan, H.; Konghouleux, D.; Vonshak, M.; Tindo, M.; Mercier, J.L.; Fresneau, D.; Mikissa, J.B.; McGlynn, T.; Mikheyev, A.S.; Oettler, J.; Estoup, A. |
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Worldwide invasion by the little fire ant: routes of introduction and eco-evolutionary pathways |
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Journal Article |
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2010 |
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Evolutionary Applications |
Abbreviated Journal |
Evol. Appl. |
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3 |
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4 |
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363-374 |
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biological invasion; introduction routes; parthenogenesis; reproduction system; Wasmannia auropunctata |
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Biological invasions are generally thought to occur after human aided migration to a new range. However, human activities prior to migration may also play a role. We studied here the evolutionary genetics of introduced populations of the invasive ant Wasmannia auropunctata at a worldwide scale. Using microsatellite markers, we reconstructed the main routes of introduction of the species. We found three main routes of introduction, each of them strongly associated to human history and trading routes. We also demonstrate the overwhelming occurrence of male and female clonality in introduced populations of W. auropunctata, and suggest that this particular reproduction system is under selection in human-modified habitats. Together with previous researches focused on native populations, our results suggest that invasive clonal populations may have evolved within human modified habitats in the native range, and spread further from there. The evolutionarily most parsimonious scenario for the emergence of invasive populations of the little fire ant might thus be a two-step process. The W. auropunctata case illustrates the central role of humans in biological change, not only due to changes in migration patterns, but also in selective pressures over species. |
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[Foucaud, Julien; Loiseau, Anne; Jourdan, Herve; Konghouleux, Djoel; Estoup, Arnaud] Montpellier SupAgro, INRA, UMR CBGP, IRD,Cirad, F-34988 Montferrier Sur Lez, France, Email: julien.foucaud@legs.cnrs-gif.fr |
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WILEY-BLACKWELL PUBLISHING, INC |
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1752-4571 |
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ISI:000278913600004 |
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EcoFoG @ eric.marcon @ |
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79 |
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Boisse, P.; Aimene, Y.; Dogui, A.; Dridi, S.; Gatouillat, S.; Hamila, N.; Khan, M.A.; Mabrouki, T.; Morestin, F.; Vidal-Sallé, E. |
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Hypoelastic, hyperelastic, discrete and semi-discrete approaches for textile composite reinforcement forming |
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Journal Article |
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2010 |
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International Journal of Material Forming |
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3 |
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Supplement 2 |
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1229-1240 |
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Textile composites Forming simulations Continuous/discrete approaches Hyperelasticity Hypoelasticity Semi-discrete finite element |
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The clear multi-scale structure of composite textile reinforcements leads to develop continuous and discrete approaches for their forming simulations. In this paper two continuous modelling respectively based on a hypoelastic and hyperelastic constitutive model are presented. A discrete approach is also considered in which each yarn is modelled by shell finite elements and where the contact with friction and possible sliding between the yarns are taken into account. Finally the semi-discrete approach is presented in which the shell finite element interpolation involves continuity of the displacement field but where the internal virtual work is obtained as the sum of tension, in-plane shear and bending ones of all the woven unit cells within the element. The advantages and drawbacks of the different approaches are discussed. |
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Hypoelastic, hyperelastic, discrete and semi-discrete approaches for textile composite reinforcement forming |
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EcoFoG @ eric.marcon @ 8 |
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90 |
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Author |
Marcon, E.; Puech, F. |
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Evaluating the geographic concentration of industries using distance-based methods |
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Journal Article |
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2003 |
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Journal of Economic Geography |
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J. Econ. Geogr. |
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3 |
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4 |
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409-428 |
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agglomeration; clustering; geographic concentration; location of firms |
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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. |
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ENGREF, Kourou 97310, French Guiana |
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Publisher |
OXFORD UNIV PRESS |
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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 |
1468-2702 |
ISBN |
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Expedition |
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Conference |
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Notes |
ISI:000185742500004 |
Approved |
no |
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Call Number |
EcoFoG @ eric.marcon @ |
Serial |
269 |
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