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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. |
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Title |
Thermotolerance adaptation to human-modified habitats occurs in the native range of the invasive ant Wasmannia auropunctata before long-distance dispersal |
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Journal Article |
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2013 |
Publication  |
Evolutionary Applications |
Abbreviated Journal |
Evol. Appl. |
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Volume |
6 |
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4 |
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721-734 |
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Adaptation; Heat shock; Invasive species; Natural selection and contemporary evolution; Thermotolerance |
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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. |
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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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Young, E.F.; Belchier, M.; Hauser, L.; Horsburgh, G.J.; Meredith, M.P.; Murphy, E.J.; Pascoal, S.; Rock, J.; Tysklind, N.; Carvalho, G.R. |
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Title |
Oceanography and life history predict contrasting genetic population structure in two Antarctic fish species |
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Journal Article |
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Year |
2015 |
Publication |
Evolutionary Applications |
Abbreviated Journal |
Evolutionary Applications |
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8 |
Issue |
5 |
Pages |
486-509 |
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Notothenia rossii; Champsocephalus gunnari; Connectivity; Individual-based Modelling; Ocean circulation; Planktonic dispersal; Population genetics; Scotia Sea |
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Understanding the key drivers of population connectivity in the marine environment is essential for the effective management of natural resources. Although several different approaches to evaluating connectivity have been used, they are rarely integrated quantitatively. Here, we use a 'seascape genetics' approach, by combining oceanographic modelling and microsatellite analyses, to understand the dominant influences on the population genetic structure of two Antarctic fishes with contrasting life histories, Champsocephalus gunnari and Notothenia rossii. The close accord between the model projections and empirical genetic structure demonstrated that passive dispersal during the planktonic early life stages is the dominant influence on patterns and extent of genetic structuring in both species. The shorter planktonic phase of C. gunnari restricts direct transport of larvae between distant populations, leading to stronger regional differentiation. By contrast, geographic distance did not affect differentiation in N. rossii, whose longer larval period promotes long-distance dispersal. Interannual variability in oceanographic flows strongly influenced the projected genetic structure, suggesting that shifts in circulation patterns due to climate change are likely to impact future genetic connectivity and opportunities for local adaptation, resilience and recovery from perturbations. Further development of realistic climate models is required to fully assess such potential impacts. © 2015 The Authors. |
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Campus Agronomique, Kourou Cedex, France |
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Export Date: 28 May 2015 |
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EcoFoG @ webmaster @ |
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604 |
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Vedel, V.; Brena, C.; Arthur, W. |
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Demonstration of a heritable component of the variation in segment number in the centipede Strigamia maritima |
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Journal Article |
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Year |
2009 |
Publication |
Evolution & Development |
Abbreviated Journal |
Evol. Dev. |
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11 |
Issue |
4 |
Pages |
434-440 |
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Here we address the question of how arthropod segment number may evolve by reporting the results of further work on the model system Strigamia maritima. Recently, we showed that there was a plastic component of the variation in segment number within this species; now we demonstrate that there is also a heritable component. This is important because it enables a connection to be made between the known latitudinal trend among species of geophilomorph centipedes ( more segments at lower latitudes) and the parallel trend within them. This latter trend is best documented in S. maritima but is also known in several other species. However, while a general connection between the inter- and intraspecific trends can now be made, deciding upon a specific hypothesis of the nature of the selection involved is still problematic. We provide two alternative hypotheses, one based on the temperature-related plasticity in segment number being adaptive, the other based on it being nonadaptive. |
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[Vedel, Vincent; Arthur, Wallace] Natl Univ Ireland, Dept Zool, Sch Nat Sci, Galway, Ireland, Email: wallace.arthur@nuigalway.ie |
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WILEY-BLACKWELL PUBLISHING, INC |
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1520-541X |
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ISI:000267659600011 |
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EcoFoG @ eric.marcon @ |
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200 |
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Vedel, V.; Apostolou, Z.; Arthur, W.; Akam, M.; Brena, C. |
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An early temperature-sensitive period for the plasticity of segment number in the centipede Strigamia maritima |
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Journal Article |
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2010 |
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Evolution & Development |
Abbreviated Journal |
Evol Dev |
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12 |
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4 |
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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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Delph, L.F.; Arntz, A.M.; Scotti-Saintagne, C.; Scotti, I. |
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Title |
The Genomic Architecture of Sexual Dimorphism in the Dioecious Plant Silene Latifolia |
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Journal Article |
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2010 |
Publication |
Evolution |
Abbreviated Journal |
Evolution |
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64 |
Issue |
10 |
Pages |
2873-2886 |
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Artificial selection; genetic correlations; linkage map; sex-specific expression; sexual conflict |
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Evaluating the genetic architecture of sexual dimorphism can aid our understanding of the extent to which shared genetic control of trait variation versus sex-specific control impacts the evolutionary dynamics of phenotypic change within each sex. We performed a QTL analysis on Silene latifolia to evaluate the contribution of sex-specific QTL to phenotypic variation in 46 traits, whether traits involved in trade-offs had colocalized QTL, and whether the distribution of sex-specific loci can explain differences between the sexes in their variance/covariance matrices. We used a backcross generation derived from two artificial-selection lines. We found that sex-specific QTL explained a significantly greater percent of the variation in sexually dimorphic traits than loci expressed in both sexes. Genetically correlated traits often had colocalized QTL, whose signs were in the expected direction. Lastly, traits with different genetic correlations within the sexes displayed a disproportionately high number of sex-specific QTL, and more QTL co-occurred in males than females, suggesting greater trait integration. These results show that sex differences in QTL patterns are congruent with theory on the resolution of sexual conflict and differences based on G-matrix results. They also suggest that trade-offs and trait integration are likely to affect males more than females. |
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[Delph, Lynda F.; Arntz, A. Michele; Scotti, Ivan] Indiana Univ, Dept Biol, Bloomington, IN 47405 USA, Email: ldelph@indiana.edu |
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WILEY-BLACKWELL PUBLISHING, INC |
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0014-3820 |
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ISI:000282573800006 |
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EcoFoG @ eric.marcon @ |
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31 |
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Vendramin, G.G.; Fady, B.; Gonzalez-Martinez, S.C.; Hu, F.S.; Scotti, I.; Sebastiani, F.; Soto, A.; Petit, R.J. |
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Genetically depauperate but widespread: The case of an emblematic mediterranean pine |
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Journal Article |
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Year |
2008 |
Publication |
Evolution |
Abbreviated Journal |
Evolution |
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62 |
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3 |
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680-688 |
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chloroplast microsatellites; conservation genetics; diversity depletion; human impact; Pinus pinea |
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Genetic variation is generally considered a prerequisite for adaptation to new environmental conditions. Thus the discovery of genetically depauperate but geographically widespread species is unexpected. We used 12 paternally inherited chloroplast microsatellites to estimate population genetic variation across the full range of an emblematic circum-Mediterranean conifer, stone pine (Pinus pinea L.). The same chloroplast DNA haplotype is fixed in nearly all of the 34 investigated populations. Such a low level of variation is consistent with a previous report of very low levels of diversity at nuclear loci in this species. Stone pine appears to have passed through a severe and prolonged demographic bottleneck, followed by subsequent natural- and human-mediated dispersal across the Mediterranean Basin. No other abundant and widespread plant species has as little genetic diversity as P. pinea at both chloroplast and nuclear markers. However, the species harbors a nonnegligible amount of variation at adaptive traits. Thus a causal relationship between genetic diversity, as measured by marker loci, and the evolutionary precariousness of a species, cannot be taken for granted. |
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[Vendramin, Giovanni G.] Ist Genet Vegetale, Sez Firenze, Florence, Italy, Email: petit@pierroton.inra.fr |
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BLACKWELL PUBLISHING |
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0014-3820 |
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ISI:000253758600016 |
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EcoFoG @ eric.marcon @ |
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141 |
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Scotti, I.; Delph, L.F. |
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Selective trade-offs and sex-chromosome evolution in Silene latifolia |
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Journal Article |
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2006 |
Publication |
Evolution |
Abbreviated Journal |
Evolution |
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60 |
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9 |
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1793-1800 |
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antagonistic genes; linkage map; quantitative trait loci; sex-specific expression; Y chromosome |
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Alleles of sexually antagonistic genes (i.e., genes with alleles affecting fitness in opposite directions in the two sexes) can avoid expression in the sex to which they are detrimental via two processes: they are subsumed into the nonrecombining, sex-determining portion of the sex chromosomes or they evolve sex-limited expression. The former is considered more likely and leads to Y-chromosome degeneration. We mapped quantitative trait loci of major effect for sexually dimorphic traits of Silene latifolia to the recombining portions of the sex chromosomes and found them to exhibit sex-specific expression, with the Y chromosome in males controlling a relatively larger proportion of genetic variance than the X in females and the average autosome. Both reproductive and ecophysiological traits map to the recombining region of the sex chromosomes. We argue that genetic correlations among traits maintain recombination and polymorphism for these genes because of balancing selection in males, whereas sex-limited expression represses detrimental alleles in females. Our data suggest that the Y chromosome of S. latifolia plays a major role in the control of key metabolic activities beyond reproductive functions. |
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Indiana Univ, Dept Biol, Bloomington, IN 47405 USA, Email: ivan.scotti@kourou.cirad.fr |
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SOC STUDY EVOLUTION |
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0014-3820 |
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ISI:000241226800005 |
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EcoFoG @ eric.marcon @ |
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174 |
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Dutech, C.; Maggia, L.; Tardy, C.; Joly, H.I.; Jarne, P. |
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Tracking a genetic signal of extinction-recolonization events in a neotropical tree species: Vouacapoua americana aublet in french guiana |
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Journal Article |
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2003 |
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Evolution |
Abbreviated Journal |
Evolution |
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57 |
Issue |
12 |
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2753-2764 |
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allelic richness; caesalpinioideae; chloroplast DNA; climatic changes; cytonuclear disequilibrium; legummosae; microsatellite loci; tropical rainforest |
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Drier periods from the late Pleistocene and early Holocene have been hypothesized to have caused the disappearance of various rainforest species over large geographical areas in South America and restricted the extant populations to mesic sites. Subsequent improvement in climatic conditions has been associated with recolonization. Changes in population size associated with these extinction-recolonization events should have affected genetic diversity within species. However, these historical hypotheses and their genetic consequences have rarely been tested in South America. Here, we examine the diversity of the chloroplast and nuclear genomes in a Neotropical rainforest tree species, Vouacapoua americana (Leguminosae, Caesalpinioideae) in French Guiana. The chloroplast diversity was analyzed using a polymerase chain reaction-restriction fragment length polymorphism method (six pairs of primers) in 29 populations distributed over most of French Guiana, and a subset of 17 populations was also analyzed at nine polymorphic microsatellite loci. To determine whether this species has experienced extinction-recolonization, we sampled populations in areas supposedly not or only slightly affected by climatic changes, where the populations would not have experienced frequent extinction, and in areas that appear to have been recently recolonized. In the putatively recolonized areas, we found patches of several thousands of hectares homogeneous for chloroplast variation that can be interpreted as the effect of recolonization processes from several geographical origins. In addition, we observed that, for both chloroplast and nuclear genomes, the populations in newly recolonized areas exhibited a significantly smaller allelic richness than others. Controlling for geographic distance, we also detected a significant correlation between chloroplast and nuclear population differentiation. This result indicates a cytonuclear disequilibrium that can be interpreted as a historical signal of a genetic divergence between fragmented populations. In conclusion, the spatial genetic structure of contemporary V. americana populations shows evidence that this species has experienced large extinction-recolonization events, which were possibly caused by past climatic change. |
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CIRAD Foret, Silvolab, Ecol Mol, F-97387 Kourou, France, Email: laruent.maggia@cirad.fr |
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SOC STUDY EVOLUTION |
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0014-3820 |
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ISI:000188061800007 |
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EcoFoG @ eric.marcon @ |
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241 |
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Chartier, M.; Gibernau, M.; Renner, S.S. |
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The evolution of pollinator-plant interaction types in the araceae |
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Journal Article |
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2014 |
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Evolution |
Abbreviated Journal |
Evolution |
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68 |
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5 |
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1533-1543 |
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Ancestral state reconstruction; Inflorescence traits; Phylogeny; Pollination syndromes; Trap flowers |
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Most plant-pollinator interactions are mutualistic, involving rewards provided by flowers or inflorescences to pollinators. Antagonistic plant-pollinator interactions, in which flowers offer no rewards, are rare and concentrated in a few families including Araceae. In the latter, they involve trapping of pollinators, which are released loaded with pollen but unrewarded. To understand the evolution of such systems, we compiled data on the pollinators and types of interactions, and coded 21 characters, including interaction type, pollinator order, and 19 floral traits. A phylogenetic framework comes from a matrix of plastid and new nuclear DNA sequences for 135 species from 119 genera (5342 nucleotides). The ancestral pollination interaction in Araceae was reconstructed as probably rewarding albeit with low confidence because information is available for only 56 of the 120-130 genera. Bayesian stochastic trait mapping showed that spadix zonation, presence of an appendix, and flower sexuality were correlated with pollination interaction type. In the Araceae, having unisexual flowers appears to have provided the morphological precondition for the evolution of traps. Compared with the frequency of shifts between deceptive and rewarding pollination systems in orchids, our results indicate less lability in the Araceae, probably because of morphologically and sexually more specialized inflorescences. © 2013 The Society for the Study of Evolution. |
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Department of Biology, University of Munich, Munich, 80638, Germany |
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Society for the Study of Evolution |
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15585646 (Issn) |
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Export Date: 30 May 2014; Source: Scopus; Coden: Evola; Language of Original Document: English |
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EcoFoG @ webmaster @ |
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544 |
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Bourreau, D.; Aimene, Y.; Beauchene, J.; Thibaut, B. |
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Feasibility of glued laminated timber beams with tropical hardwoods |
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Journal Article |
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2013 |
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European Journal of Wood and Wood Products |
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Eur. J. Wood Wood Prod. |
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71 |
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5 |
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653-662 |
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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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