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| Author | Groc, S.; Delabie, J.H.C.; Cereghino, R.; Orivel, J.; Jaladeau, F.; Grangier, J.; Mariano, C.S.F.; Dejean, A. | ||||
| Title | Ant species diversity in the 'Grands Causses' (Aveyron, France): In search of sampling methods adapted to temperate climates RID C-4034-2011 | Type | Journal Article | ||
| Year | 2007 | Publication | Comptes Rendus Biologies | Abbreviated Journal | C. R. Biol. |
| Volume | 330 | Issue | 12 | Pages | 913-922 |
| Keywords | ant diversity; Grands Causses; sampling methods; temperate climate | ||||
Abstract  |
This study aimed at showing the applicability of using a combination of four sampling methods (i.e., Winkler extractors, pitfall traps, baiting and manual collection), something most often conducted in the tropics, to create an inventory of ant species diversity in temperate environments. We recorded a total of 33 ant species in the Grands Causses by comparing three vegetal formations: a steppic lawn ('causse' sensu stricto), which was the most species-rich (29 species), followed by an oak grove (22 species) and a pine forest (17 species). No sampling method alone is efficient enough to provide an adequate sampling, but their combination permits one to make a suitable inventory of the myrmecofauna and to obtain information on the ecology of these ant species. | ||||
| Address | [Groc, S; Orivel, J; Grangier, J; Dejean, A] Univ Toulouse 3, CNRS, UMR 5174, Lab Evolut & Diversite Biol, F-31062 Toulouse, France, Email: alain.dejean@wanadoo.fr | ||||
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| Publisher | Elsevier France-Editions Scientifiques Medicales Elsevier | Place of Publication | Editor | ||
| Language | English | Summary Language | Original Title | ||
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| ISSN | 1631-0691 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | WOS:000251852800009 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 359 | ||
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| Author | Brémaud, I.; Ruelle, J.; Thibaut, A.; Thibaut, B. | ||||
| Title | Changes in viscoelastic vibrational properties between compression and normal wood: Roles of microfibril angle and of lignin | Type | Journal Article | ||
| Year | 2013 | Publication | Holzforschung | Abbreviated Journal | |
| Volume | 67 | Issue | 1 | Pages | 75-85 |
| Keywords | Compression wood (CW); Damping coefficient; Ft-Ir; Internal friction; Lignin; Microfibril angle (MFA); Picea abies; Pinus pinaster; Pinus sylvestris; Specific dynamic modulus of elasticity; Viscoelastic vibrational properties | ||||
| Abstract |
This study aims at better understanding the respective influences of specific gravity (γ ), microfibril angle (MFA), and cell wall matrix polymers on viscoelastic vibrational properties of wood in the axial direction. The wide variations of properties between normal wood (NW) and compression wood (CW) are in focus. Three young bent trees (Picea abies, Pinus sylvestris and Pinus pinaster ), which recovered verticality, were sampled. Several observed differences between NW and CW were highly significant in terms of anatomical, physical (γ, shrinkage, CIE Lab colorimetry), mechanical (compressive strength), and vibrational properties. The specific dynamic modulus of elasticity (E′/γ) decreases with increasing MFA, and Young's modulus (E′) can be satisfactorily explained by γ and MFA. Apparently, the type of the cell wall polymer matrix is not influential in this regard. The damping coefficient (tan δ) does not depend solely on the MFA of NW and CW. The tanδ-E′/γ relationship evidences that, at equivalent E′/γ, the tan δ of CW is approximately 34% lower than that of NW. This observation is ascribed to the more condensed nature of CW lignins, and this is discussed in the context of previous findings in other hygrothermal and time/frequency domains. It is proposed that the lignin structure and the amount and type of extractives, which are both different in various species, are partly responsible for taxonomy-related damping characteristics. Copyright © by Walter de Gruyter • Berlin • Boston. | ||||
| Address | Wood Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland | ||||
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| Notes | Export Date: 25 February 2013; Source: Scopus | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 471 | ||
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| Author | Pierrejean, I.; Mehinto, T.; Beauchene, J. | ||||
| Title | Comparative Analysis of Three Different Methods Used to Determine the Elastic Modulus for a Choice of Tropical Guianese Wood Species | Type | Journal Article | ||
| Year | 2017 | Publication | Pro Ligno | Abbreviated Journal | |
| Volume | 13 | Issue | 1 | Pages | 3-17 |
| Keywords | density; modulus of elasticity; static and dynamic tests; tropical woods | ||||
| Abstract |
This study compares variability in the longitudinal Modulus of Elasticity (MOE) values, measured by three different methods, for eight tropical wood species covering a wide range of densities, a property that has been little described in the literature for some of the species studied. The modulus of elasticity in wood species is one of the main mechanical properties measured to characterize wood materials. However, this property is seldom described for the tropical wood species studied here, and the method used is often variable. The aim is to answer the following questions. In the methods used, what are the main variability factors which influence modulus measurement? Is the modulus different with regard to the solicitation direction (radial or tangential)? Which relationship exists between modulus and density for these species?
The samples were subjected to the four-point bending test, then to the free vibration test and to the forced-vibration test (which allows tests on small samples).The samples were subjected to stress in radial and tangential directions. The modulus values obtained by the different methods were well correlated for most of the species. The relationship between modulus and density was very good at inter-specific level because sampling covered a wide range of densities. But this relationship was not so good for each of the species sampled. This kind of test was not appropriate for detecting differences in behavior between the two directions of solicitation for these species. The main features of the three methods were summarized, highlighting the advantages of each for the species studied. |
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| Notes | Approved | no | |||
| Call Number | EcoFoG @ webmaster @ | Serial | 753 | ||
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| Author | Houel, E.; Gonzalez, G.; Bessière, J.-M.; Odonne, G.; Eparvier, V.; Deharo, E.; Stien, D. | ||||
| Title | Therapeutic switching: From antidermatophytic essential oils to new leishmanicidal products | Type | Journal Article | ||
| Year | 2015 | Publication | Memorias do Inst. Oswaldo Cruz | Abbreviated Journal | |
| Volume | 110 | Issue | 1 | Pages | 106-113 |
| Keywords | Antifungal agents; Antiparasitic agents; Leishmania; Peritoneal macrophages – sesquiterpenes; Therapeutic switching | ||||
| Abstract |
This study examined whether the antidermatophytic activity of essential oils (EOs) can be used as an indicator for the discovery of active natural products against Leishmania amazonensis. The aerial parts of seven plants were hydrodistilled. Using broth microdilution techniques, the obtained EOs were tested against three strains of dermatophytes (Trichophyton mentagrophytes, Microsporum gypseum and Microsporum canis). To compare the EOs antifungal and antiparasitic effects, the EOs activities against axenic amastigotes of L. amazonensis were concurrently evaluated. For the most promising EOs, their antileishmanial activities against parasites infecting peritoneal macrophages of BALB/c mice were measured. The most interesting antifungal candidates were the EOs from Cymbopogon citratus, Otacanthus azureus and Protium heptaphyllum, whereas O. azureus, Piper hispidum and P. heptaphyllum EOs exhibited the lowest 50% inhibitory concentration (IC50) values against axenic amastigotes, thus revealing a certain correspondence between both activities. The P. hispidum EO was identified as the most promising product in the results from the infected macrophages model (IC50: 4.7 μg/mL, safety index: 8). The most abundant compounds found in this EO were sesquiterpenes, notably curzerene and furanodiene. Eventually, the evaluation of the antidermatophytic activity of EOs appears to be an efficient method for identifying new potential drugs for the treatment of L. amazonensis. | ||||
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| Notes | Export Date: 17 March 2015 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 587 | ||
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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. | ||||
| 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 | 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 | Khia, A.; Ghanmi, M.; Satrani, B.; Aafi, A.; Aberchane, M.; Quaboul, B.; Chaouch, A.; Amusant, N.; Charrouf, Z. | ||||
| Title | Effect of provenance on the chemical and microbiological quality of essential oils of Rosmarinus officinalis L. in Morocco | Type | Journal Article | ||
| Year | 2014 | Publication | Phytotherapie | Abbreviated Journal | Phytotherapie |
| Volume | 12 | Issue | 6 | Pages | 341-347 |
| Keywords | Antibacterial; Antifungal activity; Chemical composition; Essential Oil; Provenance; Rosmarinus officinalis | ||||
| Abstract |
This study is an assessment of the chemical quality and evaluation of antibacterial and antifungal activity of rosemary’s essential oils from three regions of Morocco (Rchida and Berkine/Eastern Morocco and Aknoul/North East of Morocco. The essential oils obtained by hydrodistillation of the leaves and young twigs of rosemary, were analyzed by GC / FID and GC/ MS. These essential oils are characterized by the presence of α and β-pinene, camphene, 1,8-cineole and camphor compounds. The quality of these essential oils met the AFNOR NF ISO 4730 rosemary Morocco kind (1,8-cineole). The evaluation of the antimicrobial activity of essential oils of Rosmarinus officinalis showed low efficacy against microorganisms tested which were all inhibited from 1/100 v/v except for Penicillium expansum whose growth was stopped at the concentration 1/250 v/v. | ||||
| Address | Département d’Environnement et Sociétés, UMR EcoFoG, CIRAD, BP 732Kourou cedex, French Guiana | ||||
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| Notes | Export Date: 31 December 2014 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 574 | ||
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| Author | Gond, V.; Guitet, S. | ||||
| Title | Remote Sensing in Post-Logging Diagnoses for Forest Management in French Guiana | Type | Journal Article | ||
| Year | 2009 | Publication | Bois et Forets des Tropiques | Abbreviated Journal | Bois For. Trop. |
| Volume | 63 | Issue | 299 | Pages | 5-13 |
| Keywords | selective logging; logging impact inspections; French Guiana; remote sensing; forest management | ||||
| Abstract |
This study is part of the activities carried out to monitor tow-impact logging operations in humid tropical forests. The sustainability of these activities is highly dependent on the scale of logging damage, and managers therefore need to carry out effective checks on the quality of forestry work. In this study, remote sensing was used to track the extension of logging operations and to assess damage, through images acquired during and after logging in each parcel. Analysis of the high-resolution images (10 m) clearly identifies logged-over clearings and some skidding tracks, allowing assessments of gaps opening up in the canopy. Several parcels were monitored in this French Guiana study. A simple diagnostic procedure was established for each parcel to assess logging intensity and identify new logging tracks and timber losses. The remote sensing toot thus helps to make more accurate assessments of logging quality and to draw relevant conclusions for the logging company. The study has demonstrated the usefulness of remote sensing to identify damage after logging. The quality of restitution of the damage was validated by means of a database on the logging terrain and through field missions. This post-logging inspection tool can now be automated for fully operational use by forest managers. | ||||
| Address | [Gond, Valery] Univ Laval, Fac Foresterie, Umr Ecofog Guyane francaise, Cirad,UR 36, Quebec City, PQ G1V OA6, Canada | ||||
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| Publisher | CIRAD-CENTRE COOPERATION INT RECHERCHE AGRONOMIQUE POUR | Place of Publication | Editor | ||
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| ISSN | 0006-579X | ISBN | Medium | ||
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| Notes | ISI:000266156700001 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 280 | ||
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| Author | Roggy, J.C.; Nicolini, E.; Imbert, P.; Caraglio, Y.; Bosc, A.; Heuret, P. | ||||
| Title | Links between tree structure and functional leaf traits in the tropical forest tree Dicorynia guianensis Amshoff (Caesalpiniaceae) | Type | Journal Article | ||
| Year | 2005 | Publication | Annals of Forest Science | Abbreviated Journal | Ann. For. Sci. |
| Volume | 62 | Issue | 6 | Pages | 553-564 |
| Keywords | Dicorynia guianensis; leaf structure; functional leaf traits; plasticity; tree structure | ||||
| Abstract |
This study looked at the interactive effects of tree architectural stage of development (ASD) and light availability on different plant traits (growth parameters, leaf morpho-anatomy and photosynthetic capacities) in the tropical species Dicorynia guianensis. A qualitative architectural analysis was used to categorize tree individuals sampled along a natural light gradient. The results show that some traits could have an ASD-dependence at the whole plant and leaf level without control of light. The changes observed relate to vigour thresholds the plant has to reach to shift from one ASD to another (i.e., the number of nodes and the internodes length per Growth Unit). Light conditions do not modify these thresholds but may modify the time they are crossed. Tree height was found strongly modulated by light conditions; hence, at a similar height, individuals may belong to different ASD. At the functional level, a decrease in N-m, and A(maxm) was observed with increasing light availability, while N-a increased and A(maxa) remained unaffected. An ASD effect was also observed on Amaxa and LMA but not on Amaxm. These results demonstrated a weak ability of photosynthetic plasticity in response to light conditions, and that variations of leaf photosynthetic variables according to ASD can be explained by modifications in leaf nitrogen and LMA. Questions on the reliability of a height-based sampling strategy for evaluating the phenotypic plasticity of trees in relation to light conditions are raised. | ||||
| Address | INRA, Ecol Forets Guyane, ENGREF, UMR CIRAD, F-97387 Kourou, Guyane Francais, France, Email: roggy.j@cirad.fr | ||||
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| Publisher | EDP SCIENCES S A | Place of Publication | Editor | ||
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| ISSN | 1286-4560 | ISBN | Medium | ||
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| Notes | ISI:000232084400009 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 229 | ||
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| Author | McClure, M.; Chouteau, M.; Dejean, A. | ||||
| Title | Territorial aggressiveness on the arboreal ant Azteca alfari by Camponotus blandus in French Guiana due to behavioural constraints | Type | Journal Article | ||
| Year | 2008 | Publication | Comptes Rendus Biologies | Abbreviated Journal | C. R. Biol. |
| Volume | 331 | Issue | 9 | Pages | 663-667 |
| Keywords | Azteca alfari (Dolichoderinae); Camponotus blandus (Formicinae); foraging; rhythm of activity; territorial aggressiveness | ||||
| Abstract |
This study reports new information on interactions between two sympatric ant species, the plant-ant Azteca alfari (Dolichoderinae) living in association with the myrmecophyte Cecropia obtusa (Cecropiaceae) and Camponotus blandus (Formicinae), a ground-nesting, arboreal-foraging species. Workers of A. alfari forage only on the foliage and the tipper parts of the trunk of their host Cecropia, while C. blandus nests in the ground but frequently forages and patrols pioneer tree foliage, including Cecropia. The activity pattern of A. alfari and the number of C. blandus on Cecropia obtusa was monitored hourly during a two-day period in a disturbed area in French Guiana. The maximum activity of C. blandus occurred between 8:30 and 12:30, at which time A. alfari had retreated within the domatia and were least present on the trunks. Even though aggressive confrontations were observed, C. blandus workers often initiate confrontations but do not prey on A. alfari nor exploit food bodies produced by Cecropia, the principal food source of A. alfari. Hence hostility appears to be the result of territoriality. Differences in their foraging rhythms are proposed as promoting resource and territory partitioning in this ant assemblage. | ||||
| Address | [McClure, Melanie] Concordia Univ, Dept Biol, Montreal, PQ H4B 1R6, Canada, Email: m_mcclur@alcor.concordia.ca | ||||
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| Publisher | ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER | Place of Publication | Editor | ||
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| ISSN | 1631-0691 | ISBN | Medium | ||
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| Notes | ISI:000259290200004 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 130 | ||
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| Author | Wagner, F.; Rutishauser, E.; Blanc, L.; Herault, B. | ||||
| Title | Effects of Plot Size and Census Interval on Descriptors of Forest Structure and Dynamics | Type | Journal Article | ||
| Year | 2010 | Publication | Biotropica | Abbreviated Journal | Biotropica |
| Volume | 42 | Issue | 6 | Pages | 664-671 |
| Keywords | Amazonia; biomass fluxes; coefficient of variation; forest permanent plots; turnover rates; WinBUGS | ||||
| Abstract |
This study was designed to explicitly formulate the effect of census interval and plot size on the variability of descriptors of tropical forest structure (stand density, basal area, aboveground biomass [AGB]) and dynamic (tree growth, mortality and recruitment rates, biomass fluxes). A unique dataset from a broad plot network (37.5 ha) surveyed every 2 yr over a 16-yr period was used to develop and parameterize a new statistical model predicting the coefficients of variation for each forest descriptor. More than 90 percent of the inherent variability of these coefficients was predicted using a simple model including plot size and census interval in a Bayesian modeling framework. All descriptors of forest structure varied by <10 percent for plot sizes 42 ha. Among the descriptors of forest dynamics, AGB loss was the most variable. The number of 6.25 ha plots required to estimate its mean, over a 16-yr period, within a 20 percent error of the mean remains above four. This contrasts with a relative constant flux of biomass entering the plot through tree growth and tree recruitment. Tree growth was remarkably well estimated with <15 percent variability for a 2-yr census in a plot of 2 ha. This study provides an easy method to assess dataset limitations in efforts to estimate descriptors of forest structure and dynamic, which is of primary importance to decipher any clear consequences of global change in tropical forests. | ||||
| Address | [Wagner, Fabien; Herault, Bruno] Univ Antilles Guyane, UMR Ecol Forets Guyane, Kourou 97379, French Guiana, Email: bruno.herault@ecofog.gf | ||||
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| Publisher | WILEY-BLACKWELL PUBLISHING, INC | Place of Publication | Editor | ||
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| ISSN | 0006-3606 | ISBN | Medium | ||
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| Notes | ISI:000283949700006 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 16 | ||
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