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Marcon, E.; Herault, B. |
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entropart: An R package to measure and partition diversity |
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2015 |
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Journal of Statistical Software |
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Journal of Statistical Software |
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67 |
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8 |
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1-26 |
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Biodiversity; Entropy; Partitioning |
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entropart is a package for R designed to estimate diversity based on HCDT entropy or similarity-based entropy. It allows calculating species-neutral, phylogenetic and functional entropy and diversity, partitioning them and correcting them for estimation bias. © 2015, American Statistical Association. All rights reserved. |
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Cirad, Campus agronomique, BP 316, Kourou, French Guiana |
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Export Date: 22 October 2015 |
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EcoFoG @ webmaster @ |
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633 |
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Marcon, E.; Traissac, S.; Puech, F.; Lang, G. |
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Tools to characterize point patterns: dbmss for R |
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2015 |
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Journal of Statistical Software |
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Journal of Statistical Software |
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67 |
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Codesnippet3 |
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1-15 |
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Point patterns; R; Spatial structure |
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The dbmss package for R provides an easy-to-use toolbox to characterize the spatial structure of point patterns. Our contribution presents the state of the art of distance-based methods employed in economic geography and which are also used in ecology. Topographic functions such as Ripley’s K, absolute functions such as Duranton and Overman’s Kd and relative functions such as Marcon and Puech’s M are implemented. Their confidence envelopes (including global ones) and tests against counterfactuals are included in the package. © 2015, American Statistical Association. All rights reserved. |
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AgroParisTech, INRA, UMR 518 Math. Info. Appli., 16 rue Claude Bernard, Paris, France |
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Export Date: 22 October 2015 |
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EcoFoG @ webmaster @ |
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635 |
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Aili, S.R.; Touchard, A.; Koh, J.M.S.; Dejean, A.; Orivel, J.; Padula, M.P.; Escoubas, P.; Nicholson, G.M. |
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Comparisons of Protein and Peptide Complexity in Poneroid and Formicoid Ant Venoms |
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2016 |
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Journal of Proteome Research |
Abbreviated Journal |
Journal of Proteome Research |
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15 |
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9 |
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3039-3054 |
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ant venom; Hymenoptera; Lc-Maldi-Tof Ms; mass spectrometry; nanoLC-ESI-QTOF MS/MS; peptidome; proteomic analysis; toxin |
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Animal venom peptides are currently being developed as novel drugs and bioinsecticides. Because ants use venoms for defense and predation, venomous ants represent an untapped source of potential bioactive toxins. This study compared the protein and peptide components of the poneroid ants Neoponera commutata, Neoponera apicalis, and Odontomachus hastatus and the formicoid ants Ectatomma tuberculatum, Ectatomma brunneum, and Myrmecia gulosa. 1D and 2D PAGE revealed venom proteins in the mass range <10 to >250 kDa. NanoLC-ESI-QTOF MS/MS analysis of tryptic peptides revealed the presence of common venom proteins and also many undescribed proteins. RP-HPLC separation followed by MALDI-TOF MS of the venom peptides also revealed considerable heterogeneity. It was found that the venoms contained between 144 and 1032 peptides with 5-95% of peptides in the ranges 1-4 and 1-8 kDa for poneroid and formicoid ants, respectively. By employing the reducing MALDI matrix 1,5-diaminonapthalene, up to 28 disulfide-bonded peptides were also identified in each of the venoms. In particular, the mass range of peptides from poneroid ants is lower than peptides from other venoms, indicating possible novel structures and pharmacologies. These results indicate that ant venoms represent an enormous, untapped source of novel therapeutic and bioinsecticide leads. © 2016 American Chemical Society. |
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VenomeTech, 473 Route des Dolines, Valbonne, France |
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Export Date: 15 September 2016 |
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EcoFoG @ webmaster @ |
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695 |
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Leroy, C.; Carrias, J.-F.; Céréghino, R.; Corbara, B. |
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The contribution of microorganisms and metazoans to mineral nutrition in bromeliads |
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Journal Article |
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2016 |
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Journal of Plant Ecology |
Abbreviated Journal |
Journal of Plant Ecology |
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9 |
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3 |
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241-255 |
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digestive mutualism; insect-assisted nutrients; leaf δ15N; multiple N sources; myrmecotrophy |
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Aims One critical challenge for plants is to maintain an adequate nutrient supply under fluctuating environmental conditions. This is particularly true for epiphytic species that have limited or no access to the pedosphere and often live in harsh climates. Bromeliads have evolved key innovations such as epiphytism, water-absorbing leaf trichomes, tank habit and Crassulacean acid metabolism (CAM) photosynthesis that enable them to survive under various environmental conditions. Bromeliads encompass diverse ecological types that live on different substrates (they can be terrestrial, epilithic or epiphytic) and vary in their ability to retain water (they can be tank-forming or tankless) and photosynthetic pathway (i.e. C3 or CAM). In this review, we outline the nutritional modes and specializations that enable bromeliads to thrive in a wide range of nutrient-poor (mostly nitrogen-depleted) environments. Important Findings Bromeliads have evolved a great diversity of morphologies and functional adaptations leading to the existence of numerous nutritional modes. Focusing on species that have absorptive foliar trichomes, we review evidence that bromeliads have evolved multi-faceted nutritional strategies to respond to fluctuations in the supply of natural nitrogen (N). These plants have developed mutualistic associations with many different and functionally diverse terrestrial and aquatic microorganisms and metazoans that contribute substantially to their mineral nutrition and, thus, their fitness and survival. Bacterial and fungal microbiota-assisted N provisioning, protocarnivory, digestive mutualisms and myrmecotrophic pathways are the main strategies used by bromeliads to acquire nitrogen. The combination of different nutritional pathways in bromeliads represents an important adaptation enabling them to exploit nutrient-poor habitats. Nonetheless, as has been shown for several other vascular plants, multiple partners are involved in nutrient acquisition indicating that there have been convergent adaptations to nutrient scarcity. Finally, we point out some gaps in the current knowledge of bromeliad nutrition that offer fascinating research opportunities. © The Author 2015. Published by Oxford University Press on behalf of the Institute of Botany, Chinese Academy of Sciences and the Botanical Society of China. |
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CNRS, EcoLab, 118 Route de Narbonne, Toulouse, France |
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Export Date: 28 June 2016 |
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EcoFoG @ webmaster @ |
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683 |
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Boulogne, I.; Constantino, R.; Amusant, N.; Falkowski, M.; Rodrigues, A.M.S.; Houel, E. |
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Ecology of termites from the genus Nasutitermes (Termitidae: Nasutitermitinae) and potential for science-based development of sustainable pest management programs |
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2017 |
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Journal of Pest Science |
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Journal of Pest Science |
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90 |
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1 |
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19-37 |
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Antimicrobial and insecticidal botanical extracts; Ipm; Nasutitermes corniger; Sustainable management; Taxonomic history; Termitidae |
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The genus Nasutitermes is among the most abundant wood-feeding Termitidae and an extremely diverse and heterogeneous group in terms of its biogeography and morphology. Despite the major role of several Nasutitermes species as structural pests, the phylogenetic status of this genus is still unclear, along with a confused taxonomy and species identification remaining difficult. The first aim of this review was thus to gather and discuss studies concerning the taxonomic status of the genus Nasutitermes in order to clarify this crucial point. Then, our goal was to gain new insights into the management of N. corniger, considered to be the most economically detrimental pest of this genus in South America and a Nasutitermes model species, while filtering available information concerning its biology through the prism of termite control, as well as critically examine the existing methods. We indeed strongly believe that increasing our knowledge of this species’ biological strategies is the key to progress in the challenging question of their sustainable management. © 2016, Springer-Verlag Berlin Heidelberg. |
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Laboratoire de Biodiversité et Biotechnologies Microbiennes (LBBM), Observatoire Océanologique, Sorbonne Universités, Université Pierre et Marie Curie, CNRS, Banyuls/Mer, France |
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Export Date: 17 February 2017 |
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EcoFoG @ webmaster @ |
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732 |
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Amusant, N.; Beauchene, J.; Digeon, A.; Chaix, G. |
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Essential oil yield in rosewood (Aniba rosaeodora Ducke): Initial application of rapid prediction by near infrared spectroscopy based on wood spectra |
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2016 |
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Journal of Near Infrared Spectroscopy |
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Journal of Near Infrared Spectroscopy |
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24 |
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6 |
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507-515 |
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Aniba rosaeodora; Calibration; Essential oil yield; Nir; Pls; Rosewood |
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Rosewood (Aniba rosaeodora) essential oil is a valuable ingredient that has long been used in the perfume and cosmetic industries. The main rosewood timber quality parameters are its essential oil yield and quality. A hydrodistillation method has been developed for yield determination, but it is time consuming. Here we tested the applicability of near infrared (NIR) spectroscopy for determining essential oil yield directly from wood powder. Essential oil from 139 wood powders was extracted via hydrodistillation. The measurements were based on the ratio between the extracted essential oil mass and the oven-dried wood mass and were correlated with the wood powder NIR spectra. The calibration model statistical findings demonstrated that NIR could be a fast and feasible alternative method for selecting trees with a high essential oil yield potential. NIR-based predictions obtained in an independent validation set indicated a high correlation (r2e = 0.92) with laboratory essential oil yield measurements. This NIR model could help wood managers in selecting trees with a high essential oil yield potential and in developing sustainable rosewood management strategies. © IM Publications LLP 2016. All rights reserved. |
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ESALQ-USP, Piracicaba, Brazil |
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Cited By :1; Export Date: 17 January 2017 |
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EcoFoG @ webmaster @ |
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707 |
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Touré, S.; Nirma, C.; Falkowski, M.; Dusfour, I.; Boulogne, I.; Jahn-Oyac, A.; Coke, M.; Azam, D.; Girod, R.; Moriou, C.; Odonne, G.; Stien, D.; Houel, E.; Eparvier, V. |
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Aedes aegypti Larvicidal Sesquiterpene Alkaloids from Maytenus oblongata |
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2017 |
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Journal of Natural Products |
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Journal of Natural Products |
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80 |
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2 |
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384-390 |
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Four new sesquiterpene alkaloids (1-4) with a β-dihydroagrofuran skeleton and a new triterpenoid (5) were isolated from an ethyl acetate extract of Maytenus oblongata stems. Their structures were elucidated using 1D and 2D NMR spectroscopy as well as MS and ECD experiments. The M. oblongata stem EtOAc extract and the pure compounds isolated were tested for larvicidal activity against Aedes aegypti under laboratory conditions, and compounds 2 and 3 were found to be active. © 2017 The American Chemical Society and American Society of Pharmacognosy. |
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Laboratoire de Biodiversité et Biotechnologies Microbiennes (LBBM), Sorbonne Universités, UPMC Univ. Paris 06, CNRS, Observatoire Océanologique, Banyuls-sur-Mer, France |
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Export Date: 13 March 2017 |
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EcoFoG @ webmaster @ |
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743 |
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Talaga, S.; Dejean, A.; Carinci, R.; Gaborit, P.; Dusfour, I.; Girod, R. |
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Updated Checklist of the Mosquitoes (Diptera: Culicidae) of French Guiana |
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2015 |
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Journal of Medical Entomology |
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Journal of Medical Entomology |
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52 |
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5 |
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770-782 |
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culicid; Neotropics; South America; species checklist; vector |
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The incredible mosquito species diversity in the Neotropics can provoke major confusion during vector control programs when precise identification is needed. This is especially true in French Guiana where studies on mosquito diversity practically ceased 35 yr ago. In order to fill this gap, we propose here an updated and comprehensive checklist of the mosquitoes of French Guiana, reflecting the latest changes in classification and geographical distribution and the recognition of current or erroneous synonymies. This work was undertaken in order to help ongoing and future research on mosquitoes in a broad range of disciplines such as ecology, biogeography, and medical entomology. Thirty-two valid species cited in older lists have been removed, and 24 species have been added including 12 species (comprising two new genera and three new subgenera) reported from French Guiana for the first time. New records are from collections conducted on various phytotelmata in French Guiana and include the following species: Onirion sp. cf Harbach and Peyton (2000), Sabethes (Peytonulus) hadrognathus Harbach, Sabethes (Peytonulus) paradoxus Harbach, Sabethes (Peytonulus) soperi Lane and Cerqueira, Sabethes (Sabethinus) idiogenes Harbach, Sabethes (Sabethes) quasicyaneus Peryassú , Runchomyia (Ctenogoeldia) magna (Theobald), Wyeomyia (Caenomyiella) sp. cf Harbach and Peyton (1990), Wyeomyia (Dendromyia) ypsipola Dyar, Wyeomyia (Hystatomyia) lamellata (Bonne-Wepster and Bonne), Wyeomyia (Miamyia) oblita (Lutz), and Toxorhynchites (Lynchiella) guadeloupensis (Dyar and Knab). At this time, the mosquitoes of French Guiana are represented by 235 species distributed across 22 genera, nine tribes, and two subfamilies. |
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UnitÉ d'Entomologie Médicale, Institut Pasteur de la Guyane, 23 Avenue Pasteur, Cayenne Cedex, France |
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Export Date: 22 October 2015 |
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EcoFoG @ webmaster @ |
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636 |
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Lebrini, M.; Suedile, F.;Roos, C. |
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Corrosion inhibitory action of ethanol extract from Bagassa guianensis on the corrosion of zinc in ASTM medium |
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2018 |
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Journal of Materials and Environmental Sciences |
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Journal of Materials and Environmental Sciences |
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9 |
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2 |
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414-423 |
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Ethanol extract of Bagassa guianensis was tested as corrosion inhibitor for zinc in ASTM medium using polarization and electrochemical impedance spectroscopy (EIS). The results obtained show that this plant extract could serve as an effective inhibitor for the corrosion of zinc in sodium chloride media. The extract obtained give inhibition around 85%. Polarization curves show that Bagassa guianensis extract affects the anodic and cathodic reactions and the corrosion potential values were shifted to the positive potentials in the presence of the crude extract in the ASTM medium. The experimental data obtained from EIS method show a frequency distribution and therefore a modelling element with frequency dispersion behavior, a constant phase element (CPE alpha,Q ) has been used. Graphical methods are illustrated by synthetic data to determine the parameter of CPE (alpha, Q). Studies on the phytochemical constituents of thetotal extract were also established. Electrochemical studies, on the chemical families present in the crude extract, were also carried out to find the main constituents responsible for corrosion inhibition properties of the plant extract. |
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797 |
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Vanbellingen, Q.P.; Fu, T.; Bich, C.; Amusant, N.; Stien, D.; Della-Negra, S.; Touboul, D.; Brunelle, A. |
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Mapping Dicorynia guianensis Amsh. wood constituents by submicron resolution cluster-TOF-SIMS imaging |
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2016 |
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Journal of Mass Spectrometry |
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Journal of Mass Spectrometry |
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51 |
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6 |
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412-423 |
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Dicorynia guianensis; heartwood formation; mass spectrometry imaging; Tof-Sims; tropical wood; tryptamine |
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The preparation of tropical wood surface sections for time-of-flight secondary ion mass spectrometry imaging is described, and the use of delayed extraction of secondary ions and its interest for the analysis of vegetal surface are shown. The method has been applied to the study by time-of-flight secondary ion mass spectrometry imaging with a resolution of less than one micron of a tropical wood species, Dicorynia guianensis, which is one of the most exploited wood in French Guiana for its durable heartwood. The heartwood of this species exhibits an economical importance, but its production is not controlled in forestry. Results show an increase of tryptamine from the transition zone and a concomitant decrease of inorganic ions and starch fragment ions. These experiments lead to a better understanding of the heartwood formation and the origin of the natural durability of D. guianensis. Copyright © 2016 John Wiley & Sons, Ltd. Copyright © 2016 John Wiley & Sons, Ltd. |
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Department of Chemistry and Biochemistry, Florida International University, Miami, FL, United States |
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EcoFoG @ webmaster @ |
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684 |
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