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Leroy, Céline ; Orivel, Jérôme ; Dejean, Alain ; Corbara, Bruno |
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Title |
Des arbres et des fourmis : échanges de bons procédés |
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Journal Article |
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2017 |
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Espèces |
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25 |
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14-23 |
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Phylogénétique ; Archéozoologie ; Entomologie ; Ecologie ; Microbiologie ; Exobiologie ; Ophiologie |
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Sous les tropiques, plantes et fourmis sont impliquées dans nombre d’interactions plus ou moins étroites. Au coeur de réseaux d’interactions impliquant bien d’autres espèces, en échange de protection et de quelques nutriments, des “plantes à fourmis” procurent, dans une relation mutualiste, gite et couvert à des “fourmis à plantes”. |
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EcoFoG @ webmaster @ |
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312 |
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Author |
Kanguem, J.N.; Robert, F.; Roos, C. |
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Title |
Biocorrosion of stainless steel 254 SMO by Amazonians microorganisms |
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Conference Article |
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Year |
2011 |
Publication |
European Corrosion Congress 2011, EUROCORR 2011 |
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4 |
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3373 |
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Bio corrosion; Bio film; Electrochemical techniques; Stainless steel |
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Corrosion induced by the microorganisms is a phenomenon still poorly known and difficult to interpret. In this work we are interested in marine corrosion of stainless steel 254 SMO by Amazonians biofilms. The objective is to achieve an experimental laboratory to reproduce the corrosion completely controlled environment. The microbiologically influenced corrosion (MIC) of stainless steel by marine bacteria was investigated using surface analysis (scanning electron microscopy (SEM)), and electrochemical techniques (the open circuit potential, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization curves). The epifluorescence microscopy has been used to correlate the experiments. We investigated the role of some chemical parameters and the influence of the tide. |
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Laboratoire des Materiaux et Molecules en Milieu Amazonien, UAG-UMR ECOFOG, Campus Trou Biran, Cayenne 97337, French Guiana |
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Stockholm |
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9781618394125 (Isbn) |
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4-8 septembre 2011 |
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Export Date: 23 May 2012; Source: Scopus; Language of Original Document: English; Correspondence Address: Kanauem, J.N.; Laboratoire des Materiaux et Molecules en Milieu Amazonien, UAG-UMR ECOFOG, Campus Trou Biran, Cayenne 97337, French Guiana; email: christophe.roos@guyane.univ-ag.fr |
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EcoFoG @ webmaster @ |
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21 |
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Thoen, D.; Hérault, B. |
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Plant species richness and regenerating potentialities in deciduous forests and spruce plantations of the “Semois ardennaise” floodplain (Belgium; France) |
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2007 |
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Floodplain Protection, Restoration, Management. Why and How? |
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137-146 |
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Forets Alluviales Pessieres Bois De Feuillus Biodiversite Restauration Ecologique |
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Lavoisier |
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Paris (France) |
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Tremolieres, M.; Schnitzler, A.: Silan, P. |
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EcoFoG @ webmaster @ 36 |
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79 |
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Gond, V. |
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Title |
Eastern Guiana shield land cover classification using SPOT-4 /VEGETATION instrument |
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2002 |
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Global Land Cover 2000 conference |
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7 |
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Spot-4; Vegetation; Mapping; Guiana |
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Ispra, Italy |
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18-22 March 2002 |
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EcoFoG @ webmaster @ 65 |
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27 |
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Houël, Emeline; Stien, Didier; Bourdy, Geneviève; Deharo, Eric |
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Chapter 161: Quassinoids: anticancer and antimalarial activities |
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2013 |
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Handbook of Natural Products |
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3775 - 3802 |
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Quassinoids were initially isolated as bitter principles of plants of the Simaroubaceae family. These natural products are formed by oxidative degradation of triterpene derivatives. Since the 1970s, these molecules have attracted attention because of their promising biological activities, especially in the context of research regarding active anticancer and antimalarial principles. In this chapter, the structural diversity of quassinoids and their botanical and geographical occurrence are described, combining a historical perspective from the literature references regarding these two major biological activities and focusing on the results obtained in vivo with the most promising compounds; in vitro studies are less relevant and have already been extensively reviewed in the literature. The biological activities with respect to the uses of the corresponding Simaroubaceae in traditional medicine are also analyzed. |
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Springer-Verlag |
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Berlin Heidelberg |
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Ramawat, Kishan Gopal; Merillon, Jean-Michel |
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EcoFoG @ webmaster @ |
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164 |
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Floch, J.-M.; Marcon, E.; Puech, F. |
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Title |
Spatial distribution of points |
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2018 |
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Handbook of Spatial Analysis |
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71-111 |
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Statisticians carry out close examination of spatialized data, such as the distribution of household income, the location of industrial or commercial establishments, the distribution of schools in cities, etc. Answers can be found through analyses of one or more predefined geographical scales such as neighbourhoods, districts or statistical blocks. However, it is tempting to preserve the individual data and to work with the exact position of the entities that are being studied. If that is the case, statisticians have to conduct analyses based on geolocation data without carrying out any geographical aggregation. Observations are taken as points in space and the objective is to characterise these point distributions. Understanding and mastering statistical methods that process this individual and spatialized information enables us to work on data that are now increasingly accessible and sought after because they provide very precise analyses of distributions studied (Ellison et al. 2010; Barlet et al. 2013). In this framework of analysis, statisticians who have sets of points to analyse are faced with several important methodological questions: how can such data with thousands or even millions of observations be represented and characterised spatially? What statistical tools exist that can be used to study these observations relating to households, employees, firms, stores, equipment or travel, for example? How can the qualitative or quantitative characteristics of the observations being studied be taken into account? How can any attractions or repulsions between points or between different types of points be highlighted? How can we assess the significance of the results obtained, etc? The purpose of this chapter is to help statisticians to provide statistically robust results from the study of spatialized data that is not based on predefined zoning. To do this, we will review the literature on the subject of statistical methods used to characterise point distributions and we will explain the associated issues. We will use simple examples to explain the advantages and disadvantages of the most frequently adopted approaches. The code provided in R will be used to reproduce the examples covered. |
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Insee-Eurostat |
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Loonis, V.; Bellefon, M.-P. de |
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EcoFoG @ webmaster @ |
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318 |
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Corbara B. ; Leroy C. ; Orivel J. ; Dejean A. ; Delsinne T. |
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Title |
Relaciones entre las hormigas y las plantas en los trópicos del Nuevo Mundo. Capitulo 9 |
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Book Chapter |
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2019 |
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Hormigas de Columbia |
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203-253 |
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L'univers étonnant des fourmis a toujours été à l'humanité ; sa structure organisationnelle nous oblige à réfléchir et à enquêter de manière permanente dans les explications d'innombrables faits biologiques liés à ces petits organismes sociaux. Nous portons tous dans notre imaginaire la recherche de réponses sur le comportement complexe des fourmis. Une très intéressante et surprenante était la suivante se rapporte aux itinéraires des fourmis quand nous observons dans les bois lors qu'ils chargent les feuilles de petites à grandes.
beaucoup plus grands qu'eux, et nous essayons de savoir lequel d'entre eux
sera la destination finale de ces charges dans ce labyrinthe.
monde aux chemins infinis, aux fins inconnues,
mais avec des plans prédéterminés sur l'utilité finale
de ce qu'ils transportent à un je ne sais où et je ne sais pas où et je découvre
comment se termine le suspense de ces longues journées.... Il s'agit
les nombreuses questions au sujet de ces déplacements par l'entremise de la
les entrailles de la terre, de ces excursions à dessein
dans nos écosystèmes. |
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Universidad Nacional de Colombia |
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Bogota - Colombie |
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978-958-783-765-0 |
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EcoFoG @ carole.legrand @ |
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322 |
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Boulogne, Isabelle ; Amusant, Nadine ; Constantino, Réginaldo ; Falkowski, Michaël ; Rodrigues, Alice M.S ; Houël, Emeline |
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From the understanding of biological strategies to sustainable pest management: the case of Nasutitermes corniger |
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Conference Article |
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2018 |
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IGR/WP |
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18-10907 |
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23 |
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EcoFoG @ carole.legrand @ |
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320 |
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Fu, T. ; Touboul, D. ; Della-Negra, S. ; Houël, E. ; Amusant, N. ; Duplais, C. ; Brunelle, A. |
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Localization od bioactive metabolites in durable ? Tropical tree Sextonia rubra (Lauracaea) with argon and bismuth cluster dual beam depth profiliing and imaging |
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Conference Article |
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2016 |
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Imaging mass spectrometry conference – Ustron – Pologne – Octobre 2016 |
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Many tropical tree species generate natural decay resistance by producing bioactive metabolites. Among them, Sextonia rubra (Lauraceae) is a widely exploited species for construction in French Guiana. Rubrynolide and rubrenolide, which are secondary metabolites isolated from the stem wood of S. rubra, exhibit potent antifungal and termiticidal activities that result in the exceptional durability of the heartwood. Although the structure and total synthesis of these two biologically active compounds have been well described in literature, little is known about their cellular localization or biosynthesis process in living trees. Time-of-flight secondary ion mass spectrometry (TOF-SIMS) has been well known for its high lateral resolution imaging with a typical beam size of 0.4-2 µm, thus sufficient to image the wood surface at subcellular level.
Wood surfaces of sapwood, transition zone and heartwood from living trees of S. rubra were prepared with ultramicrotome using diamond knife. Each surface was mapped by Bi3+ cluster TOF-SIMS with high lateral resolution (~ 0.4 µm) which was achieved by employing burst alignment primary ion focusing mode with an extraction delay of the secondary ions to improve mass resolution. 3D imaging of a multi-structure wood sample was performed using dual beam depth profiling method, with 25 keV Bi3+ and 10 keV Ar1000+ as analysis and sputter beam, respectively. To examine the effect of life-history traits on the production of bioactive metabolites, the corresponding counterparts from a tree which had suffered stress during growth were investigated as well. |
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EcoFoG @ carole.legrand @ |
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302 |
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Leponce, Maurice ; Novotny, Vojtech ; Pascal, Olivier ; Robillard, Tony ; Legendre, Frederic ; Villemant, Claire ; Munzinger, Jérôme ; Molino, Jean François ; Drew, Richard ; Odegaard, Frode ; Schmidl, Jürgen ; Tishechkin, Alexey ; Sam, Katerina ; Bickel, Daniel ; Dahl, Chris ; Damas, Kipiro ; Fayle, Tom M. ; Gewa, Bradley ; Jacquemin, Justine ; Keltim, Martin ; Klimes, Petr ; Koane, Bonny ; Kua, Joseph ; Mantilleri, Antoine ; Mogia, Martin ; Molem, Kenneth ; Moses, Jimmy ; Nowatuo, Hans ; Orivel, Jérôme ; Pintaud, Jean Christophe ; Roisin, Yves ; Sam, Legi ; Siki, Byron ; Soldati, Laurent ; Soulier Perkins, Adeline ; Tulai, Salape ; Yombai, Jacob ; Wardhaugh, Carl ; Basset, Yves |
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Land module of our planet reviewed – Papua New Guinea: aims, methods and first taxonomical results |
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2016 |
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Insects of Mount Wilhelm, Papua New Guinea |
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11-48 |
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Until now the altitudinal factor has not been taken into account to estimate tropical arthropod diversity. The ultimate aim of the terrestrial biodiversity
survey “Our Planet Reviewed – Papua New Guinea” was to estimate biological diversity generated by altitudinal turnover of arthropod species. It took place on Mount Wilhelm, Papua New Guinea highest peak (4509 m a.s.l.), and one of the few equatorial mountains outside the Andes left with a continuous undisturbed forest from the sea level all the way to the timber line limit. An unprecedented sampling effort was concentrated over 16 days in 2012 with a semi-simultaneous sampling at eight different elevations (every 500 m from 200 m to 3700 m a.s.l.). Arthropods were collected with various methods: flight interception traps (targeting Coleoptera), Malaise traps (targeting Hymenoptera, Diptera and Hemiptera), Steiner traps (targeting tephritid flies), beating of the understorey vegetation, and insecticide spraying on tree barks (various groups targeted). A botany survey was conducted at each elevation to characterize vegetation. An additional site, Wanang, was sampled according to the same protocol, as replicated lowland site. Our team combined international experts with local postgraduate students, para-ecologists and villagers. Arthropod samples collected during the biotic survey were pre-sorted in Papua New Guinea and forwarded to taxonomists worldwide. The current book presents the first taxonomic results of the biotic survey. Project outputs included not only species discovery, but also direct financial benefits to landowner communities, raised profile of conservation areas, training of paraecologists and postgraduate students, education programmes and, finally, crucial biodiversity information needed for ecological analyses and conservation management. |
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Muséum national d'Histoire naturelle |
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Paris - France |
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978-2-85653-784-8 |
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EcoFoG @ carole.legrand @ |
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