References of "Mahy, Grégory"
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See detailTaxa distribution and RAPD markers indicate different origin and regional differentiation of hybrids in the invasive Fallopia complex in central-western Europe
Krebs, C.; Mahy, Grégory ULg; Matthies, D. et al

in Plant Biology (2010), 12(1), 215-223

Interspecific hybridization can be a driving force for evolutionary processes during plant invasions, by increasing genetic variation and creating novel gene combinations, thereby promoting genetic ... [more ▼]

Interspecific hybridization can be a driving force for evolutionary processes during plant invasions, by increasing genetic variation and creating novel gene combinations, thereby promoting genetic differentiation among populations of invasive species in the introduced range. We examined regional genetic structure in the invasive Fallopia complex, consisting of F. japonica var. japonica, F. sachalinensis and their hybrid F. × bohemica, in seven regions in Germany and Switzerland using RAPD analysis and flow cytometry. All individuals identified as F. japonica var. japonica had the same RAPD phenotype, while F. sachalinensis (11 RAPD phenotypes for 11 sampled individuals) and F. × bohemica (24 RAPD phenotypes for 32 sampled individuals) showed high genotypic diversity. Bayesian cluster analysis revealed three distinct genetic clusters. The majority of F. × bohemica individuals were assigned to a unique genetic cluster that differed from those of the parental species, while the other F. × bohemica individuals had different degrees of admixture to the three genetic clusters. At the regional scale, the occurrence of male-fertile F. sachalinensis coincided with the distribution of F. × bohemica plants showing a high percentage of assignment to both parental species, suggesting that they originated from hybridization between the parental species. In contrast, in regions where male-fertile F. sachalinensis were absent, F. × bohemica belonged to the non-admixed genetic group, indicating multiple introductions of hybrids or sexual reproduction among hybrids. We also found regional differentiation in the gene pool of F. × bohemica, with individuals within the same region more similar to each other than to individuals from different regions. [less ▲]

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See detailColonization Credit in Restored Wet Heathlands
Cristofoli, Sara ULg; Piqueray, Julien ULg; Dufrêne, Marc ULg et al

in Restoration Ecology (2010), 18(5), 645-655

Although human-driven landscape modification is generally characterized by habitat destruction and fragmentation, it may also result in the creation of new habitat patches, providing conditions conducive ... [more ▼]

Although human-driven landscape modification is generally characterized by habitat destruction and fragmentation, it may also result in the creation of new habitat patches, providing conditions conducive to spontaneous colonization. In this article, we propose the concept of ‘‘colonization credit’’ (i.e., the number of species yet to colonize a patch, following landscape changes) as a framework to evaluate the success of colonization, in terms of species richness, in new/restored habitats, taking into account the spatial structure of landscapes. The method mirrors similar approaches used to estimate extinction debt in the context of habitat fragmentation, that is, comparisons, between old and new habitat patches, of the relationships among spatial patch metrics and patch species richness. We applied our method to the case of spontaneous colonization of newly created habitat patches suitable for wet heathland plant communities in South Belgium. Colonization credit was estimated for the total species richness, the specialist species richness, and the species richness of three emergent groups (EGs) of specialist species, delineated on the basis of dispersal traits. No significant colonization credit was identified either in patches created 25–55 years ago or in those created within the past 25 years, with the exception of species from our first EG (mostly anemochorous species with long-term persistent seed bank). However, the differential response of species in that first EG could not be explained through their characteristic life history traits. The results of this study are encouraging and suggest that deliberate, directed restoration activities could yield positive developments in a relatively short period of time. [less ▲]

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See detailTenke Fwaulu Sefu Ore Bodies Flora Baseline - Tenke Fungurume Mining Project
Lebrun, Julie ULg; Malaisse, François ULg; Handjila Minengo, Guylain et al

Report (2010)

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See detailTenke Fungurume Project - 2009 Flora New Ore Bodies Baseline Study - Annual Report
Lebrun, Julie ULg; Malaisse, François ULg; Handjila Minengo, Guylain et al

Report (2010)

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See detailRenouées asiatiques: Fiche synthétique de gestion
Delbart, Emmanuel ULg; Mahy, Grégory ULg

Learning material (2010)

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See detailDes alternatives aux plants invasives: la prévention commence dans nos jardins!
Halford, Mathieu ULg; Vanderhoeven, Sonia; Heemers, Leen et al

Learning material (2010)

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See detailPoster : Les espèce invasives
Delbart, Emmanuel ULg; Saad, Layla; Mahy, Grégory ULg

Learning material (2010)

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See detailPoster: Berce du Caucase, comment la reconnaître et la gérer ?
Delbart, Emmanuel ULg; Mahy, Grégory ULg

Learning material (2010)

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