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Author Clair, B.; Gril, J.; Baba, K.; Thibaut, B.; Sugiyama, J. openurl 
  Title Precautions for the structural analysis of the gelatinous layer in tension wood Type Journal Article
  Year 2005 Publication IAWA Journal Abbreviated Journal (up) IAWA J.  
  Volume 26 Issue 2 Pages 189-195  
  Keywords artefact; fibre wall; gelatinous layer (G-layer); tension wood  
  Abstract The gelatinous layer (G-layer) of tension wood fibres in hardwood contributes to the mechanical function of the living tree and has significant consequences on properties of solid wood. Its size, shape and structure observed by optical or electron microscopy exhibits characteristic anatomical features. However, we found that sectioning of non-embedded wood samples results in an uncontrolled swelling of the G-layer. In order to assess this artefact, the shape and thickness of the G-layer was monitored by serial sections from an embedded wood sample, from its trimmed transverse face to that located several hundreds of micrometres deep. The results revealed that the initial cutting before embedding produced a border effect responsible for the swollen nature, which is similar to sections from non-embedded material. After a conventional embedding technique was applied, a section of at least 30 micrometres below the trimming surface is required to observe an un-swollen G-layer.  
  Address Kyoto Univ, Res Inst Sustainable Humanosphere, Lab Biomass Morphogenesis & Informat, Kyoto 6110011, Japan, Email: clair@blmgc.univ.montp2.fr  
  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:000229698100003 Approved no  
  Call Number EcoFoG @ eric.marcon @ Serial 254  
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Author Clair, B.; Arinero, R.; Leveque, G.; Ramonda, M.; Thibaut, B. openurl 
  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 (up) 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  
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Author Bodin, S.C.; Scheel-Ybert, R.; Beauchene, J.; Molino, J.-F.; Bremond, L. url  doi
openurl 
  Title CharKey: An electronic identification key for wood charcoals of French Guiana Type Journal Article
  Year 2019 Publication IAWA Journal Abbreviated Journal (up) Iawa J.  
  Volume 40 Issue 1 Pages 75-91  
  Keywords anthracology; Charcoal anatomy; computeraided identification; Note: Supplementary material can be accessed in the online edition of this journal via brill.com/iawa.; tropical flora; Xper 2  
  Abstract Tropical tree floras are highly diverse and many genera and species share similar anatomical patterns, making the identification of tropical wood charcoal very difficult. Appropriate tools to characterize charcoal anatomy are thus needed to facilitate and improve identification in such species-rich areas. This paper presents the first computer-aided identification key designed for charcoals from French Guiana, based on the wood anatomy of 507 species belonging to 274 genera and 71 families, which covers respectively 28%, 67% and 86% of the tree species, genera and families currently listed in this part of Amazonia. Species of the same genus are recorded together except those described under a synonym genus in Détienne et al. (1982) that were kept separately. As a result, the key contains 289 'items' and mostly aims to identify charcoals at the genus level. It records 26 anatomical features leading to 112 feature states, almost all of which are illustrated by SEM photographs of charcoal. The descriptions were mostly taken from Détienne et al.'s guidebook on tropical woods of French Guiana (1982) and follow the IAWA list of microscopic features for hardwood identification (Wheeler et al. 1989). Some adjustments were made to a few features and those that are unrelated to charcoal identification were excluded. The whole tool, named CharKey, contains the key itself and the associated database including photographs. It can be downloaded on Figshare at https://figshare.com/s/d7d40060b53d2ad60389 (doi: 10.6084/m9.figshare.6396005). CharKey is accessible using the free software Xper 2 , specifically conceived for taxonomic description and computer aided-identification.  
  Address Ecole Pratique des Hautes Etudes, PSL Research University, Paris, France  
  Corporate Author Thesis  
  Publisher Brill Academic Publishers Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 09281541 (Issn) ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number EcoFoG @ webmaster @ Serial 864  
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Author Abedini, R.; Clair, B.; Pourtahmasi, K.; Laurans, F.; Arnould, O. url  openurl
  Title Cell wall thickening in developing tension wood of artificially bent poplar trees Type Journal Article
  Year 2015 Publication IAWA Journal Abbreviated Journal (up) IAWA Journal  
  Volume 36 Issue 1 Pages 44-57  
  Keywords developing xylem; Gelatinous layer; maturation stress; secondary wall layer; tree biomechanics  
  Abstract Trees can control their shape and resist gravity thanks to their ability to produce wood under tensile stress. This stress is known to be produced during the maturation of wood fibres but the mechanism of its generation remains unclear. This study focuses on the formation of the secondary wall in tension wood produced in artificially tilted poplar saplings. Thickness of secondary wall layer (SL) and gelatinous layer (GL) were measured from cambium to mature wood in several trees sampled at different times after tilting. Measurements on wood fibres produced before tilting show the progressive increase of secondary wall thickness during the growing season. After the tilting date, SL thickness decreased markedly from normal wood to tension wood while the total thickness increased compared to normal wood, with the development of a thick GL. However, even after GL formation, SL thickness continues to increase during the growing season. GL thickening was observed to be faster than SL thickening. The development of the unlignified GL is proposed to be a low cost, efficient strategy for a fast generation of tensile stress in broadleaved trees. © 2015 International Association of Wood Anatomists.  
  Address INRA, UR588 Amélioration, Génétique et Physiologie ForestièresOrléans, France  
  Corporate Author Thesis  
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  Notes Export Date: 17 April 2015 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 596  
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Author Hamadi, A.; Borderies, P.; Albinet, C.; Koleck, T.; Villard, L.; Ho Tong Minh, D.; Le Toan, T.; Burban, B. url  openurl
  Title Temporal coherence of tropical forests at P-band: Dry and rainy seasons Type Journal Article
  Year 2015 Publication IEEE Geoscience and Remote Sensing Letters Abbreviated Journal (up) IEEE Geosci. Remote Sens. Lett.  
  Volume 12 Issue 3 Pages 557-561  
  Keywords Biomass mission; forest scattering; ground-based experiment; P-band; range impulse response; temporal coherence  
  Abstract In this letter, the temporal coherence of tropical forest scattering at P-band is addressed by means of a ground-based experiment. The study is based on the TropiScat campaign in French Guiana, designed to support the Biomass mission, which will be the ESA 7th Earth Explorer mission. For Biomass, temporal coherence is a crucial parameter for coherent processing of polarimetric synthetic aperture radar (SAR) interferometry and SAR tomography in repeat-pass acquisitions. During the experiment, data were continuously collected for six months during both the rainy and dry seasons. For the rain-free days in both seasons, the coherence exhibits a daily cycle showing a high decorrelation during daytime, which is likely due to motion in the canopy. Up to a 20-day baseline, the coherence is much higher in the dry season than in the rainy season (> 0.8). From 20 to 40 days, it presents the same order of magnitude in both seasons [0.6, 0.7]. For larger temporal baselines, it becomes lower in the dry season. The results can be used to assess the long-term coherence of repeat-pass observations over a tropical forest. However, an extension of this study to several years and over other forest spots would be necessary to draw more general conclusions.  
  Address EcoFogKourou, France  
  Corporate Author Thesis  
  Publisher Institute of Electrical and Electronics Engineers Inc. Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1545598x (Issn) ISBN Medium  
  Area Expedition Conference  
  Notes Export Date: 21 October 2014; Correspondence Address: Hamadi, A.; Centre d'Etudes Spatiales de la BiosphèreFrance; Funding Details: ESA, European Space Agency Approved no  
  Call Number EcoFoG @ webmaster @ Serial 563  
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Author Dubois-Fernandez, P.C.; Le Toan, T.; Daniel, S.; Oriot, H.; Chave, J.; Blanc, L.; Villard, L.; Davidson, M.W.J.; Petit, M. url  openurl
  Title The tropiSAR airborne campaign in French Guiana: Objectives, description, and observed temporal behavior of the backscatter signal Type Journal Article
  Year 2012 Publication IEEE Transactions on Geoscience and Remote Sensing Abbreviated Journal (up) IEEE Trans Geosci Remote Sens  
  Volume 50 Issue 8 Pages 3228-3241  
  Keywords Forestry; interferometry; polarimetric synthetic aperture radar  
  Abstract The TropiSAR campaign has been conducted in August 2009 in French Guiana with the ONERA airborne radar system SETHI. The main objective of this campaign was to collect data to support the Phase A of the 7th Earth Explorer candidate mission, BIOMASS. Several specific questions needed to be addressed to consolidate the mission concept following the Phase 0 studies, and the data collection strategy was constructed accordingly. More specifically, a tropical forest data set was required in order to provide test data for the evaluation of the foreseen inversion algorithms and data products. The paper provides a description of the resulting data set which is now available through the European Space Agency website under the airborne campaign link. First results from the TropiSAR database analysis are presented with two in-depth analyses about both the temporal radiometric variation and temporal coherence at P-band. The temporal variations of the backscatter values are less than 0.5 dB throughout the campaign, and the coherence values are observed to stay high even after 22 days. These results are essential for the BIOMASS mission. The observed temporal stability of the backscatter is a good indicator of the expected robustness of the biomass estimation in tropical forests, from cross-polarized backscatter values as regarding environmental changes such as soil moisture. The high temporal coherence observed after a 22-day period is a prerequisite for SAR Polarimetric Interferometry and Tomographic applications in a single satellite configuration. The conclusion then summarizes the paper and identifies the next steps in the analysis. © 2012 IEEE.  
  Address Institut de Recherche Pour le Développement, 31062 Toulouse, France  
  Corporate Author Thesis  
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  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 01962892 (Issn) ISBN Medium  
  Area Expedition Conference  
  Notes Export Date: 9 August 2012; Source: Scopus; Art. No.: 6146421; Coden: Igrsd; doi: 10.1109/TGRS.2011.2180728; Language of Original Document: English; Correspondence Address: Dubois-Fernandez, P.C.; Office National d'Études et de Recherches Aérospatiales, Department of Electromagnetism and Radarh, 91761 Palaiseau, France; email: pdubois@onera.fr Approved no  
  Call Number EcoFoG @ webmaster @ Serial 419  
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Author Campillo, F.; Rossi, V. openurl 
  Title Convolution Particle Filter for Parameter Estimation in General State-Space Models Type Journal Article
  Year 2009 Publication IEEE Transactions on Aerospace and Electronic Systems Abbreviated Journal (up) IEEE Trans. Aerosp. Electron. Syst.  
  Volume 45 Issue 3 Pages 1063-1072  
  Keywords  
  Abstract The state-space modeling of partially observed dynamical systems generally requires estimates of unknown parameters. The dynamic state vector together with the static parameter vector can be considered as an augmented state vector. Classical filtering methods, such as the extended Kalman filter (EKF) and the bootstrap particle filter (PF), fail to estimate the augmented state vector. For these classical filters to handle the augmented state vector, a dynamic noise term should be artificially added to the parameter components or to the deterministic component of the dynamical system. However, this approach degrades the estimation performance of the filters. We propose a variant of the PF based on convolution kernel approximation techniques. This approach is tested on a simulated case study.  
  Address  
  Corporate Author Thesis  
  Publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0018-9251 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000270225500017 Approved no  
  Call Number EcoFoG @ eric.marcon @ Serial 194  
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Author Lebrini, M.; Mbomekallé, I.M.; Dolbecq, A.; Marrot, J.; Berthet, P.; Ntienoue, J.; Sécheresse, F.; Vigneron, J.; Etcheberry, A. url  openurl
  Title Manganese(III)-containing wells-dawson sandwich-type polyoxometalates: Comparison with their manganese(II) counterparts Type Journal Article
  Year 2011 Publication Inorganic Chemistry Abbreviated Journal (up) Inorg. Chem.  
  Volume 50 Issue 14 Pages 6437-6448  
  Keywords  
  Abstract We present the synthesis and structural characterization, assessed by various techniques (FTIR, TGA, UV-vis, elemental analysis, single-crystal X-ray diffraction for three compounds, magnetic susceptibility, and electrochemistry) of five manganese-containing Wells-Dawson sandwich-type (WDST) complexes. The dimanganese(II)-containing complex, [Na2(H2O) 2MnII2(As2W15O 56)2]18- (1), was obtained by reaction of MnCl2 with 1 equiv of [As2W15O 56]12- in acetate medium (pH 4.7). Oxidation of 1 by Na2S2O8 in aqueous solution led to the dimanganese(III) complex [Na2(H2O)2Mn III2(As2W15O56) 2]16- (2), while its trimanganese(II) homologue, [Na(H2O)2MnII(H2O)Mn II2(As2W15O56) 2]17- (3), was obtained by addition of ca. 1 equiv of MnCl2 to a solution of 1 in 1 M NaCl. The trimanganese(III) and tetramanganese(III) counterparts, [MnIII(H2O)Mn III2(As2W15O56) 2]15- (4) and [MnIII2(H 2O)2MnIII2(As2W 15O56)2]12- (6), are, respectively, obtained by oxidation of aqueous solutions of 3 and [MnII2(H2O)2MnII2(As 2W15O56)2]16- (5) by Na2S2O8. Single-crystal X-ray analyses were carried out on 2, 3, and 4. BVS calculations and XPS confirmed that the oxidation state of Mn centers is +II for complexes 1, 3, and 5 and +III for 2, 4, and 6. A complete comparative electrochemical study was carried out on the six compounds cited above, and it was possible to observe the distinct redox steps MnIV/III and MnIII/II. Magnetization measurements, as a function of temperature, confirm the presence of antiferromagnetic interactions between the Mn ions in these compounds in all cases with the exception of compound 2. © 2011 American Chemical Society.  
  Address Laboratoire de Physico-Chimie de L'Etat Solide, ICMMO, Université Paris-Sud, Bâtiment 410, 91405 Orsay Cedex, France  
  Corporate Author Thesis  
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  ISSN 00201669 (Issn) ISBN Medium  
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  Notes Export Date: 21 October 2011; Source: Scopus; Coden: Inoca; doi: 10.1021/ic102237x; Language of Original Document: English; Correspondence Address: Mbomekallé, I.M.; Institut Lavoisier de Versailles, UMR 8180, CNRS Université de Versailles Saint-Quentin, 45 Avenue des Etats-Unis, 78035 Versailles Cedex, France; email: israel.mbomekalle@chimie.uvsq.fr Approved no  
  Call Number EcoFoG @ webmaster @ Serial 346  
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Author Lamarre, G.P.A.; Decaëns, T.; Rougerie, R.; Barbut, J.; Dewaard, J.R.; Hebert, P.D.N.; Herbin, D.; Laguerre, M.; Thiaucourt, P.; Bonifacio Martins, M. doi  openurl
  Title An integrative taxonomy approach unveils unknown and threatened moth species in Amazonian rainforest fragments Type Journal Article
  Year 2016 Publication Insect Conservation and Diversity Abbreviated Journal (up) Insect Conserv Divers  
  Volume 9 Issue 5 Pages 475-479  
  Keywords Amazonian forest; Belém center of endemism; centinelan extinction; conservation; DNA barcoding; Lepidoptera; species discovery  
  Abstract This study focuses on the importance in hyperdiverse regions, such as the Amazonian forest, of accelerating and optimising the census of invertebrate communities.
We carried out low-intensity sampling of tropical moth (Lepidoptera) assemblages in disturbed forest fragments in Brazil.
We combined DNA barcoding and taxonomists’ expertise to produce fast and accurate surveys of local diversity, including the recognition and census of undescribed and endemic species.
Integrating expert knowledge of species distributions, we show that despite limited sampling effort, our approach revealed an unexpectedly high number of new and endemic species in severely threatened tropical forest fragments.
These results highlight the risk of silent centinelan extinctions and emphasise the urgent need for accelerated invertebrate surveys in high-endemism and human-impacted tropical forests.
 
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  ISSN 1752-4598 ISBN Medium  
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  Notes Approved no  
  Call Number EcoFoG @ webmaster @ Serial 730  
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Author Salas-Lopez, A.; Violle, C.; Mallia, L.; Orivel, J. url  doi
openurl 
  Title Land-use change effects on the taxonomic and morphological trait composition of ant communities in French Guiana Type Journal Article
  Year 2018 Publication Insect Conservation and Diversity Abbreviated Journal (up) Insect Conserv Divers  
  Volume 11 Issue 2 Pages 162-173  
  Keywords Community assembly; Formicidae; functional diversity; gradient analysis; habitat filtering; land-use intensification; n-dimensional hypervolume approach  
  Abstract Abstract Land-use changes frequently lead to major changes in the composition and diversity of organisms. A reduction in the range of strategies enabling organisms to survive in a given environment and changes in the average trait values of species may potentially be associated with variations in species? number and identity. We investigated the variation in ant taxonomic composition and morphological trait diversity along a land-use gradient in French Guiana. We measured 13 core ant morphological traits on all species sampled. We then selected the set of five traits that best captured changes along the land-use gradient. Potential effects of the variation in morphological trait diversity and average values were evaluated by examining morphological traits individually as well as in combination. We found that variation in taxonomic diversity was unrelated to the plot-level morphospace. Conversely, a significant shift in taxonomic composition was accompanied by changes in the average values of community traits along the studied gradient, examined both individually and in combination. We argue that morphological trait values may be related to the success of different species in surviving in a given environment and, therefore, are indicative of the taxonomic turnover in ants along the land-use gradient. Nevertheless, in contradiction with theoretical expectations, the morphospace is only slightly affected by habitat filtering and loosely impacted by taxonomic changes. Examining the sensitivity of the morphospace to abiotic and biotic factors and how it reflects varying ecological pressures for species is thus of the utmost importance.  
  Address  
  Corporate Author Thesis  
  Publisher John Wiley & Sons, Ltd (10.1111) Place of Publication Editor  
  Language Summary Language Original Title  
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  ISSN 1752-458x ISBN Medium  
  Area Expedition Conference  
  Notes doi: 10.1111/icad.12248 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 892  
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