Institution
University of Bordeaux
Education•Bordeaux, France•
About: University of Bordeaux is a education organization based out in Bordeaux, France. It is known for research contribution in the topics: Population & Laser. The organization has 28811 authors who have published 55536 publications receiving 1619635 citations. The organization is also known as: UB.
Topics: Population, Laser, Context (language use), Raman spectroscopy, Medicine
Papers published on a yearly basis
Papers
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TL;DR: In this article, the impact of species relative abundance on hybridization dynamics among four species from the European white oak species complex was assessed, showing that hybridisation is a common phenomenon that plays a significant role in evolution.
Abstract: Successful hybridisation and subsequent introgression lead to the transfer of genetic material across species boundaries. In this process, species relative abundance can play a significant role. If one species is less abundant than the other, its females will receive many heterospecific gametes, increasing mate-recognition errors and thus hybridisation rate. Moreover, first-generation hybrids will also more likely mate with the more abundant species, leading to asymmetric introgression. These predictions have important fundamental consequences, especially during biological invasions or when a rare species threatened by extinction is surrounded by individuals from a related species. However, experimental tests in nature of the importance of the relative abundance of each species on hybridisation dynamics remain scarce. We assess here the impact of species relative abundance on hybridisation dynamics among four species from the European white oak species complex. A total of 2107 oak trees were genotyped at 10 microsatellite markers and Bayesian clustering methods were used to identify reference trees of each species. We then used these reference trees to simulate purebred and hybrid genotypes to determine optimal threshold for genetic assignment. With this approach, we found widespread evidence of hybridisation between all studied oak species, with high occurrence of hybrids, varying from 11% to 31% according to stand and sampling strategies. This finding suggests that hybridisation is a common phenomenon that plays a significant role in evolution of this oak species complex. In addition, we demonstrate a strong impact of species abundance on both hybridisation rate and introgression directionality.
311 citations
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TL;DR: In this article, the authors investigated the migration routes of the first anatomically modern populations colonizing the European territory at the beginning of the Upper Palaeolithic, of their degree of biological, linguistic, and cultural diversity, and of the nature of their contacts with local Neanderthals, and recorded the occurrence of 157 bead types at 98 European Aurignacian sites.
311 citations
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TL;DR: This study investigates a fictitious domain model for the numerical solution of various incompressible viscous flows based on the so-called Navier–Stokes/Brinkman and energy equations with discontinuous coefficients all over an auxiliary embedding domain.
Abstract: This study investigates a fictitious domain model for the numerical solution of various incompressible viscous flows. It is based on the so-called Navier–Stokes/Brinkman and energy equations with discontinuous coefficients all over an auxiliary embedding domain. The solid obstacles or walls are taken into account by a penalty technique. Some volumic control terms are directly introduced in the governing equations in order to prescribe immersed boundary conditions. The implicit numerical scheme, which uses an upwind finite volume method on staggered Cartesian grids, is of second-order accuracy in time and space. A multigrid local mesh refinement is also implemented, using the multi-level Zoom Flux Interface Correction (FIC) method, in order to increase the precision where it is needed in the domain. At each time step, some iterations of the augmented Lagrangian method combined with a preconditioned Krylov algorithm allow the divergence-free velocity and pressure fields be solved for. The tested cases concern external steady or unsteady flows around a circular cylinder, heated or not, and the channel flow behind a backward-facing step. The numerical results are shown in good agreement with other published numerical or experimental data. Copyright © 2000 John Wiley & Sons, Ltd.
311 citations
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TL;DR: This work was conducted on Pinctada maxima nacre in order to understand its multiscale ordering and the role of the organic matrix in its structure and proposed that each tablet results from the coherent aggregation of nanograins keeping strictly the same crystallographic orientation thanks to a hetero-epitaxy mechanism.
310 citations
Authors
Showing all 28995 results
Name | H-index | Papers | Citations |
---|---|---|---|
Nicholas G. Martin | 192 | 1770 | 161952 |
George F. Koob | 171 | 935 | 112521 |
Daniel J. Jacob | 162 | 656 | 76530 |
Arthur W. Toga | 159 | 1184 | 109343 |
James M. Tour | 143 | 859 | 91364 |
Floyd E. Bloom | 139 | 616 | 72641 |
Herbert Y. Meltzer | 137 | 1148 | 81371 |
Jean-Marie Tarascon | 136 | 853 | 137673 |
Stanley Nattel | 132 | 778 | 65700 |
Michel Haïssaguerre | 117 | 757 | 62284 |
Liquan Chen | 111 | 689 | 44229 |
Marion Leboyer | 110 | 773 | 50767 |
Jean-François Dartigues | 106 | 631 | 46682 |
Alexa S. Beiser | 106 | 366 | 47457 |
Robert Dantzer | 105 | 497 | 46554 |