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Author Lamarre, G.P.A.; Amoretti, D.S.; Baraloto, C.; Bénéluz, F.; Mesones, I.; Fine, P.V.A.
Title Phylogenetic Overdispersion in Lepidoptera Communities of Amazonian White-sand Forests Type Journal Article
Year 2016 Publication Biotropica Abbreviated Journal Biotropica
Volume 48 Issue 1 Pages (down) 101-109
Keywords varillales; Amazon basin; Bottom-up; Lepidoptera composition; Moth, Nymphalidae; Phylogenetic structure
Abstract In the Amazon basin and the Guiana Shield, white-sand (WS) forests are recognized as a low-resource habitat often composed by a distinct flora with many edaphic endemic plants. Small patches of nutrient-poor white-sand forests can pose a series of challenges to plants and animals. For plants, these challenges have been shown to function as strong filters that in turn drive taxonomic, functional and phylogenetic plant composition. However, very little is known about animal communities in WS forest and the effect that low-resource availability may have on higher trophic levels. Here, we investigate the diversity of both taxonomic and phylogenetic diversity of three Lepidoptera families' (Nymphalidae, Saturniidae, and Sphingidae) assemblages between low-resource (White-Sand Forest) and two adjacent high-resource habitats, terra firme clay and seasonally flooded forests. We found no clear effect of habitat type on taxonomic composition although butterfly and moth species abundance differed among the three contrasted habitats. The WS forest Lepidoptera community is significantly more phylogenetically overdispersed than expected by chance. We suggest that these low-resource habitats filter the number of plant lineages which, in turn, creates a bottom-up control structuring Lepidoptera phylogenetic structure. We recommend long-term sampling on Lepidoptera community both at larval and adult stages that may complement this study and test hypotheses linking herbivore phylogenetic structure to plant resource availability and trophic cascade theory. © 2016 The Association for Tropical Biology and Conservation.
Address Department of Biological Sciences, International Center for Tropical Botany, Florida International University, Miami, FL, United States
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Notes Cited By :1; Export Date: 12 February 2016 Approved no
Call Number EcoFoG @ webmaster @ Serial 661
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Author Ferrer, A.; Dixon, A.F.; Gibernau, M.; Hemptinne, J.L.
Title Ovarian dynamics and specialisation in ladybirds Type Journal Article
Year 2010 Publication Ecological Entomology Abbreviated Journal Ecol. Entomol.
Volume 35 Issue 1 Pages (down) 100-103
Keywords Ladybird beetles; oocyte resorption; ovarian dynamics; specialisation
Abstract 2. This hypothesis was tested by comparing a generalist and a specialist ladybird species belonging to the same genus. 3. A resorption index was calculated for females of both species subjected to several starvation regimes. This index indicated that over a period of fasting of 3 days, the intensity of resorption was greater in the generalist than the specialist. When food was again supplied, oogenesis resumed and within 1 day was faster in the generalist than in the specialist. 4. As predicted, the resorption of oocytes and replenishment occurred faster in the generalist than in the specialist species. This is the first time, to our knowledge, that the speed and intensity of the ovarian dynamics of a predatory insect have been linked to its way of life.
Address [Ferrer, Aurelie; Hemptinne, Jean-Louis] Univ Toulouse ENFAT, CNRS, UMR 5174, F-31326 Castanet Tolosan, France, Email: jean-louis.hemptinne@educagri.fr
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Publisher WILEY-BLACKWELL PUBLISHING, INC Place of Publication Editor
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ISSN 0307-6946 ISBN Medium
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Notes ISI:000273454300013 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 86
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Author Campos Barros, Luisa Antonia ; Chaul, Julio Cezar Mario ; Orivel, Jérome ; Cardoso de Aguiar, Hilton Jeferson Alves
Title Cytogenetics of Strumigenys louisianae Roger, 1863 (Formicidae: Myrmicinae) from North-eastern Amazonia shed light on a difficult species complex Type Journal Article
Year 2021 Publication Zoologischer Anzeiger Abbreviated Journal
Volume 294 Issue Pages (down) 100-105
Keywords
Abstract Cytogenetic techniques provide powerful insights on species-rich taxa–such as ants–allowing better understanding of their biodiversity. Some hints on evolutionary paths can be observed through comparative populational cytogenetics among different ant groups. In this study, the karyotype of Strumigenys louisianae Roger from the Amazon rainforest is described and showed diploid chromosome number of 26 chromosomes. This configuration intriguingly contrasts with the already described karyotype for this species from the Atlantic rainforest with only 2n = 4 chromosomes. 18S rDNA site were detected on the pericentromeric region of the long arm of a metacentric pair and co-localizing with GC-rich chromatin. Recurrent synonymizations of S. louisianae may not reflect the species status of this taxon. The karyotypic differences and the observable morphological variation between the populations of both localities corroborates the idea of a species complex within S. louisianae. The morphology of S. louisianae from the Amazonian region is similar to that from the United States, the type locality. On the other hand, specimens from the Atlantic rainforest are more similar to the junior synonym Strumigenys unidentata Mayr. This study reinforces the need of taxonomical revision in S. louisianae by means of integrative taxonomy approaches.
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Publisher Elsevier Place of Publication Editor
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Call Number EcoFoG @ webmaster @ Serial 1028
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Author Ruiz-González, M.X.; Lauth, J.; Leroy, C.; Jauneau, A.; Gryta, H.; Jargeat, P.; Dejean, A.; Orivel, J.
Title An efficient protocol for isolating melanised chaetothyrialean anamorphic fungi associated with plant-ants Type Journal Article
Year 2013 Publication Journal of Basic Microbiology Abbreviated Journal
Volume 53 Issue 1 Pages (down) 98-100
Keywords Allomerus ants; Black fungi; Chaetothyriales; Fluorescent staining; Isolation method
Abstract Because of their ecological characteristics, slow growth rates and the presence of contaminants, Chaetothyriales fungi associated with structures built by tropical plant-ants can be difficult to isolate with standard procedures. Here, we describe an easy-to-use protocol for obtaining pure cultures by using cotton as a first substrate. We have further found by means of fluorescent stains that nuclei concentrate either in young hyphae or in the tips of the hyphae. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Address Université de Toulouse, ECOLAB, Toulouse, France
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Notes Export Date: 6 February 2013; Source: Scopus Approved no
Call Number EcoFoG @ webmaster @ Serial 461
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Author Fromin, N.; Saby, N.P.A.; Lensi, R.; Brunet, D.; Porte, B.; Domenach, A.-M.; Roggy, J.-C.
Title Spatial variability of soil microbial functioning in a tropical rainforest of French Guiana using nested sampling Type Journal Article
Year 2013 Publication Geoderma Abbreviated Journal
Volume 197-198 Issue Pages (down) 98-107
Keywords Denitrification; Respiration; Scale dependent process; Soil microbial processes; Soil organic matter; Tree influence potential
Abstract Understanding the pattern in spatial distribution of soil microbial processes is critical to understand the environmental factors that regulate them as well as to scale up these processes to ecosystem. Soil samples from a 1. ha tropical rainforest plot (Paracou, French Guiana) were analyzed according a nested sampling approach using different separation distances ranging from 0.4 to 40. m. The variability of substrate induced respiration (SIR) and of denitrification enzyme activity (DEA) was characterized in relation to various soil properties (total C and N contents, NIRS related index of soil organic matter quality, SOMQ, and index of tree influence potential, IP). The variability of SIR and DEA was higher than that of environmental properties. The patterns of accumulated variance as a function of distance varied among the soil properties. The variability of SIR and DEA mainly occurred at small (1. m) scale (and at the 10-40. m-scales for SIR), probably reflecting the quality of litter input that results of the influence of local assemblage of different tree species, though changes in the soil N and C contents. Indeed, total soil C and N contents explained the microbial properties at every scale. Coefficients of codispersion showed that neither SOMQ nor IP did correlate with SIR and DEA, and confirmed that total C and N contents explained microbial properties in a scale dependent and complex manner. Such spatial dependency underlines the importance of soil heterogeneity in this tropical forest with implications for sampling strategies when studying the microbial processes and their response to disturbances. © 2012 Elsevier B.V.
Address UMR EcoFoG, BP 709, 97387 Kourou, GUF, France
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Notes Export Date: 13 February 2013; Source: Scopus Approved no
Call Number EcoFoG @ webmaster @ Serial 466
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Author Vastra, M.; Salvin, P.; Roos, C.
Title MIC of carbon steel in Amazonian environment: Electrochemical, biological and surface analyses Type Journal Article
Year 2016 Publication International Biodeterioration and Biodegradation Abbreviated Journal International Biodeterioration and Biodegradation
Volume 112 Issue Pages (down) 98-107
Keywords Biology; Electrochemistry; Mic; Short term; Surface analyses
Abstract In this study, the corrosion of S355 carbon steel was monitored for 50 days in equatorial environment. The experiments were conducted under three complementary approaches in a natural environment: (i) bacterial diversity was assessed with Miseq sequencing, (ii) observations of the surface and identifications of deposit compounds were realised with scanning electron microscopy (SEM), Raman spectrometry and EDX analyses, (iii) electrochemical measurements were used to calculate corrosion rate and to identify the phenomena which control corrosion. The results showed that the bacterial population had changed over immersion time from a dominance of β-proteobacteria to α-proteobacteria. This evolution decreased charge transfer resistance at the metal/deposit from 41.6 to 20.8 Ω/cm2 in 50 days, caused an increase in the corrosion rate by a factor of 2, from 0.13 to 0.27 mm/year. Surface analyses showed a progressive appearance of MIC markers in the deposit such as iron sulphide and manganese oxides that were detected after 30 days of immersion in the natural environment. In conclusion, this study describes in detail, the first stage of MIC activity on carbon steel surface in an equatorial brackish water, under aerobic conditions. © 2016 Elsevier Ltd.
Address Laboratoire des Matériaux et Molécules en Milieu Agressif, Université des Antilles, UMR ECOFOG, Campus Universitaire, Schœlcher, Martinique
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Notes Export Date: 1 June 2016 Approved no
Call Number EcoFoG @ webmaster @ Serial 681
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Author Nicolini, E.; Caraglio, Y.; Pelissier, R.; Leroy, C.; Roggy, J.C.
Title Epicormic branches: a growth indicator for the tropical forest tree, Dicorynia guianensis Amshoff (Caesalpiniaceae) Type Journal Article
Year 2003 Publication Annals of Botany Abbreviated Journal Ann. Bot.
Volume 92 Issue 1 Pages (down) 97-105
Keywords Dicorynia guianensis; architecture; epicormic branch; primary growth; secondary growth; tropical forest; French Guiana; height : diameter ratio
Abstract Architectural analyses of temperate tree species using a chronological approach suggest that the expression of epicormic branches is closely related to low growth rates in the axes that make up the branching system. Therefore, sole consideration of epicormic criteria may be sufficient to identify trees with low secondary growth levels or with both low primary and secondary growth levels. In a tropical tree such as Dicorynia guianensis (basralocus), where chronological studies are difficult, this relationship could be very useful as an easily accessible indicator of growth potentials. A simple method of architectural tree description was used to characterize the global structure of more than 1650 basralocus trees and to evaluate their growth level. Measurements of simple growth characters [height, basal diameter, internode length of submittal part (top of the main axis of the tree)] and the observation of four structural binary descriptors on the main stem (presence of sequential branches and young epicormic branches, state of the submittal part, global orientation), indicated that epicormic branch formation is clearly related to a decrease in length of the successive growth units of the main stem. Analysis of height vs. diameter ratios among different tree subgroups, with and without epicormic branching, suggested that trees with epicormic branches generally have a low level of secondary growth compared with primary growth. (C) 2003 Annals of Botany Company.
Address Cirad, UMR AMAP, F-34398 Montpellier 05, France
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Publisher OXFORD UNIV PRESS Place of Publication Editor
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ISSN 0305-7364 ISBN Medium
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Notes ISI:000183980200010 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 245
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Author Chevalier, M.; Robert, F.; Amusant, N.; Traisnel, M.; Roos, C.; Lebrini, M.
Title Enhanced corrosion resistance of mild steel in 1 M hydrochloric acid solution by alkaloids extract from Aniba rosaeodora plant: Electrochemical, phytochemical and XPS studies Type Journal Article
Year 2014 Publication Electrochimica Acta Abbreviated Journal Electrochim Acta
Volume 131 Issue Pages (down) 96-105
Keywords Acidic media; Adsorption-XPS; Aniba rosaeodora extract; Anibine; C38 steel; Corrosion inhibitor
Abstract The present report continues to focus on the broadening application of plant extracts for metallic corrosion control and reports on the inhibiting effect of the Aniba rosaeodora alkaloidic extract on the corrosion of C38 steel in 1 M hydrochloric acid. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques were applied to study the metal corrosion behavior in the absence and presence of inhibitor. Studies on the phytochemical constituents were established to determine the active(s) molecule(s). XPS was also carried out to establish the mechanism of corrosion inhibition of the active molecule of C38 steel in acid solution. The inhibitor extract acted as an efficient corrosion inhibitor in 1 M HCl. The experimental data obtained from EIS method show a frequency distribution and therefore a modelling element with frequency dispersion behaviour, a constant phase element (CPEα, Q) has been used. Graphical methods are illustrated by synthetic data to determine the parameter of CPE (α, Q). Polarization studies showed that the Aniba rosaeodora alkaloidic extract was a mixed-type inhibitor and its inhibition efficiency increased with the inhibitor concentration. Studies on the phytochemical constituents of the total alkaloids extract shows that it contains the anibine as the major alkaloid. The results obtained from the electrochemical study have clearly showed that the inhibition efficiency of the total extract was due to the presence of anibine. The XPS studies showed the formation of inhibitor layer containing the Aniba rosaeodora alkaloidic extract and the anibine molecules. © 2014 Elsevier Ltd. All rights reserved.
Address Unité Matériaux et Transformations CNRS UMR 8207, Université Lille 1, École Nationale Supérieure de Chimie de Lille, Avenue Dimitri Mendeleïev-Bât. C7a BP 90108, 59652 Villeneuve d'Ascq, France
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Publisher Elsevier Ltd Place of Publication Editor
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ISSN 00134686 (Issn) ISBN Medium
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Notes Export Date: 10 June 2014; Coden: Elcaa; Correspondence Address: Lebrini, M.; Laboratoire Matériaux et Molécules en Milieux Amazonien, UAG-UMR ECOFOG Campus Troubiran, Route de Baduel, 97337 Cayenne, French Guiana; email: mounim.lebrini@guyane.univ-ag.fr Approved no
Call Number EcoFoG @ webmaster @ Serial 545
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Author Scotti, I.; Burelli, A.; Cattonaro, F.; Chagne, D.; Fuller, J.; Hedley, P.E.; Jansson, G.; Lalanne, C.; Madur, D.; Neale, D.; Plomion, C.; Powell, W.; Troggio, M.; Morgante, M.
Title Analysis of the distribution of marker classes in a genetic linkage map: a case study in Norway spruce (Picea abies karst) Type Journal Article
Year 2005 Publication Tree Genetics & Genomes Abbreviated Journal Tree Genet. Genomes
Volume 1 Issue 3 Pages (down) 93-102
Keywords Picea abies; conifers; linkage map; genome structure; molecular markers; autocorrelation
Abstract In order to analyze the large-scale structure of the genome of Norway spruce (Picea abies Karst.), a pseudo-testcross genetic linkage map was built using markers of six different types, belonging to the low (amplified fragment length polymorphisms, simple sequence repeats) or high (sequence-specific amplified polymorphisms, inter-retrotransposon amplified polymorphisms) copy-number fraction of the genome, and including expressed region-derived markers (expressed sequence tag polymorphisms). Twenty seven and 23 linkage groups of at least four markers were obtained for the female and the male parent maps, respectively. A subset of these linkage groups coalesced into 13 bi-parental linkage groups through markers shared between the two maps. This map was used to investigate the frequency of each marker type over chromosomes and the distribution of marker types relative to each other, using autocorrelation techniques. Our results show that, while the composition of chromosomes is homogeneous, low- and high-copy-number markers tend to occupy separate regions of the linkage groups, and that expressed sequences are preferentially associated with microsatellites and separated from retrotranspo sons. These results indicate that the spatial structure of Norway spruce chromosomes is not homogeneous.
Address INRA, UMR ECOFOG, Kourou 97387, French Guiana, Email: ivan.scotti@kourou.cirad.fr
Corporate Author Thesis
Publisher SPRINGER HEIDELBERG Place of Publication Editor
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ISSN 1614-2942 ISBN Medium
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Notes ISI:000244896200002 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 167
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Author Niamké, F.B.; Amusant, N.; Stien, D.; Chaix, G.; Lozano, Y.; Kadio, A.A.; Lemenager, N.; Goh, D.; Adima, A.A.; Kati-Coulibaly, S.; Jay-Allemand, C.
Title 4',5'-Dihydroxy-epiisocatalponol, a new naphthoquinone from Tectona grandis L. f. heartwood, and fungicidal activity Type Journal Article
Year 2012 Publication International Biodeterioration and Biodegradation Abbreviated Journal Int. Biodeterior. Biodegrad.
Volume 74 Issue Pages (down) 93-98
Keywords 4',5'-Dihydroxy-epiisocatalponol; Decay resistance; Fungicidal; Heartwood; Naphthoquinone; Tectona grandis
Abstract A new naphthoquinone derivative was isolated from the heartwood of the teak stem. The chemical structure of this new compound, 4',5'-dihydroxy-epiisocatalponol, was determined using 1-D and 2-D nuclear magnetic resonance experiments, vibrational circular dichroism, HRMS, and optical rotation. We showed that this new naphthoquinone derivative plays a key role in the variability of decay resistance in teak wood. A high negative correlation was found between its concentration and the mass losses of the wood samples after exposure to the brown rot Antrodia sp., the fungus that is the most virulent against teak (R = -0.9; ρ < 0.0001). In-vitro bioassays allowed us to demonstrate that 4',5'-dihydroxy-epiisocatalponol acted as a fungicide against Trametes versicolor (white rot) at 58 mg ml -1 (0.22 mM). Overall, our results demonstrated that the concentration of 4',5'-dihydroxy-epiisocatalponol could be used as a new tool to evaluate teak wood durability. © 2012 Elsevier Ltd.
Address Laboratoire de Biochimie et de Physiologie Végétales, UMR 47 DIADE – Equipe Rhizogenèse, Université Montpellier II, Place Eugène Bataillon, 34095 Montpellier Cedex 05, France
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ISSN 09648305 (Issn) ISBN Medium
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Notes Export Date: 27 September 2012; Source: Scopus; Coden: Ibbie; doi: 10.1016/j.ibiod.2012.03.010; Language of Original Document: English; Correspondence Address: Amusant, N.; CIRAD, Department Environments and societies, UMR Ecology forests of French Guiana, BP 732, 97310 Kourou cedex, French Guiana; email: nadine.amusant@cirad.fr Approved no
Call Number EcoFoG @ webmaster @ Serial 435
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