| Records |
| Author |
Foucaud, J.; Rey, O.; Robert, S.; Crespin, L.; Orivel, J.; Facon, B.; Loiseau, A.; Jourdan, H.; Kenne, M.; Masse, P.S.M.; Tindo, M.; Vonshak, M.; Estoup, A. |
| Title |
Thermotolerance adaptation to human-modified habitats occurs in the native range of the invasive ant Wasmannia auropunctata before long-distance dispersal |
Type |
Journal Article |
| Year |
2013 |
Publication |
Evolutionary Applications |
Abbreviated Journal  |
Evol. Appl. |
| Volume |
6 |
Issue |
4 |
Pages |
721-734 |
| Keywords |
Adaptation; Heat shock; Invasive species; Natural selection and contemporary evolution; Thermotolerance |
| Abstract |
Key evolutionary events associated with invasion success are traditionally thought to occur in the introduced, rather than the native range of species. In the invasive ant Wasmannia auropunctata, however, a shift in reproductive system has been demonstrated within the native range, from the sexual non-dominant populations of natural habitats to the clonal dominant populations of human-modified habitats. Because abiotic conditions of human- modified habitats are hotter and dryer, we performed lab experiments on workers from a set of native and introduced populations, to investigate whether these ecological and genetic transitions were accompanied by a change in thermotolerance and whether such changes occurred before establishment in the introduced range. Thermotolerance levels were higher in native populations from human-modified habitats than in native populations from natural habitats, but were similar in native and introduced populations from human-modified habitats. Differences in thermotolerance could not be accounted for by differences in body size. A scenario based on local adaptation in the native range before introduction in remote areas represents the most parsimonious hypothesis to account for the observed phenotypic pattern. These findings highlight the importance of human land use in explaining major contemporary evolutionary changes. © 2013 The Authors. |
| Address |
Department of Biology, Stanford University, Stanford, CA, United States |
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17524563 (Issn) |
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Export Date: 5 June 2013; Source: Scopus; :doi 10.1111/eva.12058; Language of Original Document: English; Correspondence Address: Foucaud, J.; INRA, UMR1062 CBGP, Montpellier, France; email: foucaud@supagro.inra.fr |
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EcoFoG @ webmaster @ |
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488 |
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| Author |
Vedel, V.; Apostolou, Z.; Arthur, W.; Akam, M.; Brena, C. |
| Title |
An early temperature-sensitive period for the plasticity of segment number in the centipede Strigamia maritima |
Type |
Journal Article |
| Year |
2010 |
Publication |
Evolution & Development |
Abbreviated Journal |
Evol Dev |
| Volume |
12 |
Issue |
4 |
Pages |
347-352 |
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1520-541X |
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WOS:000279440800002 |
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EcoFoG @ eric.marcon @ |
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278 |
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| Author |
Bourreau, D.; Aimene, Y.; Beauchene, J.; Thibaut, B. |
| Title |
Feasibility of glued laminated timber beams with tropical hardwoods |
Type |
Journal Article |
| Year |
2013 |
Publication |
European Journal of Wood and Wood Products |
Abbreviated Journal |
Eur. J. Wood Wood Prod. |
| Volume |
71 |
Issue |
5 |
Pages |
653-662 |
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| Abstract |
A feasibility study of glulam was carried out in French Guiana using local wood species. The aim was to determine gluing parameters affording satisfactory behaviour to manufactured glulam in a tropical climate. Three abundant wood species, with special properties, were selected for the study and resorcinol-phenol-formaldehyde resin was used for bonding. Three industrial parameters were considered: adhesive spread rate, closed assembly time and gluing pressure. Delamination and shearing tests were carried out in accordance with European Standards. The tests revealed the influence of wood properties and manufacturing parameters on joint resistance. In fact, the results showed that specific gravity and the shrinkage coefficient greatly influenced the gluing step. Indeed, wood with a medium specific gravity needed more adhesive and more pressure than wood with a high specific gravity. In addition, planing and lamella thickness were found to affect glue joint resistance. © 2013 Springer-Verlag Berlin Heidelberg. |
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CNRS-LMGC Université de Montpellier2, 34095 Montpellier, France |
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00183768 (Issn) |
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Export Date: 30 August 2013; Source: Scopus; doi: 10.1007/s00107-013-0721-4; Language of Original Document: English; Correspondence Address: Bourreau, D.; UAG-UMR Ecofog, Pôle Universitaire Guyanais, 97337 Cayenne cedex, French Guiana; email: dbourreau@nancy.inra.fr |
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EcoFoG @ webmaster @ |
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497 |
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Maron, P.A.; Schimann, H.; Ranjard, L.; Brothier, E.; Domenach, A.M.; Lensi, R.; Nazaret, S. |
| Title |
Evaluation of quantitative and qualitative recovery of bacterial communities from different soil types by density gradient centrifugation |
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Journal Article |
| Year |
2006 |
Publication |
European Journal of Soil Biology |
Abbreviated Journal |
Eur. J. Soil Biol. |
| Volume |
42 |
Issue |
2 |
Pages |
65-73 |
| Keywords |
bacterial community; soil; density gradient; DNA fingerprint |
| Abstract |
Extracting and purifying a representative fraction of bacteria from soil is necessary for the application of many techniques of microbial ecology. Here the influence of different soil types on the quantitative and qualitative recovery of bacteria by soil grinding and Nycodenz density gradient centrifugation was investigated. Three soils presenting contrasted physicochemical characteristics were used for this study. For each soil, the total (AODC: acridine orange direct count) and culturable (cfa: colony-forming units) bacterial densities were measured in three distinct fractions: (i) the primary soil, (ii) the soil pellet (soil remaining after centrifugation), and (iii) the extracted cells. The automated-ribosomal intergenic spacer analysis (A-RISA) was used to characterize the community structure directly from the DNA extracted from each fraction. The physicochemical characteristics of soils were found to influence both the efficiency of bacterial cell recovery and the representativeness of the extracted cells in term of community structures between the different fractions. Surprisingly, the most representative extracted cells were obtained from the soil exhibiting the lowest efficiency of cell recovery. Our results demonstrated that quantitative and qualitative cell recovery using Nycodenz density gradient centrifugation are not necessarily related and could be differentially biased according to soil type. (c) 2006 Elsevier SAS. All rights reserved. |
| Address |
Univ Lyon 1, CNRS, UMR 5557, Ctr Microbial Ecol, F-69622 Villeurbanne, France, Email: nazaret@biomserv.univ-lyon1.fr |
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ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER |
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1164-5563 |
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ISI:000238534500001 |
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no |
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EcoFoG @ eric.marcon @ |
Serial |
181 |
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Male, P.J.G.; Loiseau, A.; Estoup, A.; Quilichini, A.; Orivel, J. |
| Title |
Characterization of polymorphic microsatellite loci in the neotropical plant-ant Allomerus decemarticulatus (Formicidae: Myrmicinae) and multiplexing with other microsatellites from the ant subfamily Myrmicinae |
Type |
Journal Article |
| Year |
2010 |
Publication |
European Journal of Entomology |
Abbreviated Journal |
Eur. J. Entomol. |
| Volume |
107 |
Issue |
4 |
Pages |
673-675 |
| Keywords |
Hymenoptera; Formicidae; Myrmicinae; Allomerus; ant-plant mutualism; microsatellites; plant-ant |
| Abstract |
Five polymorphic microsatellite loci of the arboreal ant Allomerus decemarticulatus (Myrmicinae) were isolated and characterized. The amplification and polymorphism of seven additional microsatellite loci, previously developed for the ant species A. octoarticulatus and Wasmannia auropunctata, were also tested and the amplification conditions necessary for genotyping the complete set of 12 multiplexed markers in A. decemarticulatus determined. The number of alleles per locus ranged from three to 15 and observed heterozygosity varied front 0.09 to 0.95. Cross-species amplification of these loci was also successfully achieved in additional species of the same ant subfamily, Myrmicinae. This set of microsatellite markers will be used in studies on the mating system and population genetic structure of Myrmicinae in general and A. decemarticulatus in particular. |
| Address |
[Male, Pierre-Jean G.; Orivel, Jerome] Univ Toulouse, Lab Evolut & Divers Biol EDB, UMR 5174, F-31062 Toulouse 9, France, Email: pjmale@cict.fr |
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CZECH ACAD SCI, INST ENTOMOLOGY |
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1210-5759 |
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| Notes |
ISI:000284434300020 |
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no |
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EcoFoG @ eric.marcon @ |
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19 |
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Sierra, J.; Daudin, D.; Domenach, A.M.; Nygren, P.; Desfontaines, L. |
| Title |
Nitrogen transfer from a legume tree to the associated grass estimated by the isotopic signature of tree root exudates: A comparison of the N-15 leaf feeding and natural N-15 abundance methods |
Type |
Journal Article |
| Year |
2007 |
Publication |
European Journal of Agronomy |
Abbreviated Journal |
Eur. J. Agron. |
| Volume |
27 |
Issue |
2-4 |
Pages |
178-186 |
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agroforestry; box model; gliricidia sepium; N-15 fractionation; root turnover; tree pruning |
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Nitrogen (N) transfer from legume trees to associated crops is a key factor for the N economy of low-input agroforestry systems. In this work, we presented a new approach to estimate N transfer based on the N-15 content of root exudates and N released by root turnover of the donor plant (Gliricidia sepium) and the temporal change of the N-15 content of the receiver plant (Dichanthium aristatum). The study was carried out in greenhouse using two isotopic methods: N-15 leaf feeding (LF) and the natural N-15 abundance (NA). Measurements of exudate N-15 were made at several dates before and after tree pruning. A time-dependent box model was devised to quantify N transfer in time and to make comparisons between the isotopic methods. In NA, although tree roots and exudates presented a similar N-15 signature before tree pruning, exudates were strongly depleted in N-15 after pruning. In LF, exudates were always depleted in N-15 in relation to tree roots. Hence, the current assumption used in N transfer studies concerning the equal N-15/N-14 distribution in tissues of the donor plant and in its excreted N was not confirmed in our study. Before pruning, N transfer functioned as a two-N-source system (soil N and exudates N) and both isotopic methods provided similar estimates: 11-12% for LF and 10-15% for NA. Calculations per-formed with the model indicated that N transfer occurred with small or nil fractionation of N-15 in exudates. After pruning, there was a third N source associated with N released from tree root turnover. During this period, the isotopic signature of the receiver plant showed a transient state due to the progressive decrease of N-15 content of that N source. The amount of N derived from the tree represented 65% of the total N content of the. grass at the end of the experiments. (c) 2007 Elsevier B.V. All rights reserved. |
| Address |
INRA, Unite Agropedioclimat, UR135, Petit Bourg 97170, Guadeloupe, Email: jorge.sierra@antilles.inra.fr |
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ELSEVIER SCIENCE BV |
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1161-0301 |
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ISI:000249798900003 |
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no |
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EcoFoG @ eric.marcon @ |
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157 |
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| Author |
Lang, G.; Marcon, E. |
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Testing randomness of spatial point patterns with the Ripley statistic |
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Journal Article |
| Year |
2013 |
Publication |
ESAIM: Probability and Statistics |
Abbreviated Journal |
ESAIM PS |
| Volume |
17 |
Issue |
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Pages |
767-788 |
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Central limit theorem, goodness-of-fit test, Höffding decomposition, null, point pattern, Poisson process, null |
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Aggregation patterns are often visually detected in sets of location data. These clusters may be the result of interesting dynamics or the effect of pure randomness. We build an asymptotically Gaussian test for the hypothesis of randomness corresponding to a homogeneous Poisson point process. We first compute the exact first and second moment of the Ripley K-statistic under the homogeneous Poisson point process model. Then we prove the asymptotic normality of a vector of such statistics for different scales and compute its covariance matrix. From these results, we derive a test statistic that is chi-square distributed. By a Monte-Carlo study, we check that the test is numerically tractable even for large data sets and also correct when only a hundred of points are observed |
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no |
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EcoFoG @ webmaster @ |
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518 |
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Piponiot, C.; Rödig, E.; Putz, F.E.; Rutishauser, E.; Sist, P.; Ascarrunz, N.; Blanc, L.; Derroire, G.; Descroix, L.; Guedes, M.C.; Coronado, E.H.; Huth, A.; Kanashiro, M.; Licona, J.C.; Mazzei, L.; d’Oliveira, M.V.N.; Peña-Claros, M.; Rodney, K.; Shenkin, A.; de Souza, C.R.; Vidal, E.; West, T.A.P.; Wortel, V.; Herault, B. |
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Can timber provision from Amazonian production forests be sustainable? |
Type |
Journal Article |
| Year |
2019 |
Publication |
Environmental Research Letters |
Abbreviated Journal |
Environmental Research Letters |
| Volume |
14 |
Issue |
6 |
Pages |
064014 |
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Around 30 Mm3 of sawlogs are extracted annually by selective logging of natural production forests in Amazonia, Earth’s most extensive tropical forest. Decisions concerning the management of these production forests will be of major importance for Amazonian forests’ fate. To date, no regional assessment of selective logging sustainability supports decision-making. Based on data from 3500 ha of forest inventory plots, our modelling results show that the average periodic harvests of 20 m3 ha−1 will not recover by the end of a standard 30 year cutting cycle. Timber recovery within a cutting cycle is enhanced by commercial acceptance of more species and with the adoption of longer cutting cycles and lower logging intensities. Recovery rates are faster in Western Amazonia than on the Guiana Shield. Our simulations suggest that regardless of cutting cycle duration and logging intensities, selectively logged forests are unlikely to meet timber demands over the long term as timber stocks are predicted to steadily decline. There is thus an urgent need to develop an integrated forest resource management policy that combines active management of production forests with the restoration of degraded and secondary forests for timber production. Without better management, reduced timber harvests and continued timber production declines are unavoidable. |
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IOP Publishing |
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1748-9326 |
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no |
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EcoFoG @ webmaster @ |
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875 |
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Lehours, A.-C.; Jeune, A.-H.L.; Aguer, J.-P.; Céréghino, R.; Corbara, B.; Kéraval, B.; Leroy, C.; Perrière, F.; Jeanthon, C.; Carrias, J.-F. |
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Unexpectedly high bacteriochlorophyll a concentrations in neotropical tank bromeliads |
Type |
Journal Article |
| Year |
2016 |
Publication |
Environmental Microbiology Reports |
Abbreviated Journal |
Environmental Microbiology Reports |
| Volume |
8 |
Issue |
5 |
Pages |
689-698 |
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| Abstract |
The contribution of bacteriochlorophyll a (BChl a) to photosynthetically driven electron transport is generally low in aquatic and terrestrial systems. Here, we provide evidence that anoxygenic bacterial phototrophy is widespread and substantial in water retained by tank bromeliads of a primary rainforest in French Guiana. An analysis of the water extracted from 104 randomly selected tank bromeliads using infrared fluorimetry suggested the overall presence of abundant anoxygenic phototrophic bacterial populations. We found that purple bacteria dominated these populations responsible for unusually high BChl a/chlorophyll a ratios (>50%). Our data suggest that BChl a-based phototrophy in tank bromeliads can have significant effects on the ecology of tank-bromeliad ecosystems and on the carbon and energy fluxes in Neotropical forests. |
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1758-2229 |
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EcoFoG @ webmaster @ |
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709 |
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Lenoir, A.; Touchard, A.; Devers, S.; Christidès, J.-P.; Boulay, R.; Cuvillier-Hot, V. |
| Title |
Ant cuticular response to phthalate pollution |
Type |
Journal Article |
| Year |
2014 |
Publication |
Environmental Science and Pollution Research |
Abbreviated Journal |
Environ. Sci. Pollut. Res. |
| Volume |
21 |
Issue |
23 |
Pages |
13446-13451 |
| Keywords |
Absorption; Ants; Bbp; Bioindicator; Cuticle; Dbp; Dehp; DiBP; Phthalates; Pollutants |
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Phthalates are common atmospheric contaminants used in the plastic industry. Ants have been shown to constitute good bioindicators of phthalate pollution. Hence, phthalates remain trapped on ant cuticles which are mostly coated with long-chain hydrocarbons. In this study, we artificially contaminated Lasius niger ants with four phthalates: dibutyl phthalate (DBP), diisobutyl phthalate (DiBP), di(2-ethylhexyl) phthalate (DEHP), and benzyl butyl phthalate (BBP). The first three have previously been found on ants in nature in Touraine (France), while the fourth has not. The four phthalates disappeared rapidly (less than 5 days) from the cuticles of live ants. In contrast, on the cuticles of dead ants, DEHP quantities remained unchanged over time. These results indicate that phthalates are actively absorbed by the cuticles of live ants. Cuticular absorption of phthalates is nonspecific because eicosane, a nonnatural hydrocarbon on L. niger cuticle, was similarly absorbed. Ants are important ecological engineers and may serve as bioindicators of ecosystem health. We also suggest that ants and more generally terrestrial arthropods may contribute to the removal of phthalates from the local environment. |
| Address |
CNRS, UMR Écologie des Forêts de Guyane (EcoFoG), Campus Agronomique, BP 316Kourou Cedex, France |
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Springer Verlag |
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09441344 (Issn) |
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Export Date: 5 December 2014; Coden: Esple; Correspondence Address: Lenoir, A.; IRBI, Institut de Recherche sur la Biologie de l’Insecte, UMR CNRS 7261, Université François RabelaisFrance |
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EcoFoG @ webmaster @ |
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570 |
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