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Auteur Olivier Honnay
Documents disponibles écrits par cet auteur (2)
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An evaluation of seed zone delineation using phenotypic and population genomic data on black alder Alnus glutinosa / Hanne De Kort in Journal of applied ecology, 51 (2014)
Titre : An evaluation of seed zone delineation using phenotypic and population genomic data on black alder Alnus glutinosa Type de document : Imprimé Auteurs : Hanne De Kort ; Joachim Mergeay ; Kristine Mijnsbrugge Vander ; Guillaume Decocq ; Simona Maccherini ; Hans Henrik Kehlet Bruun ; Olivier Honnay ; Katrien Vandepitte Année de publication : 2014 Article en page(s) : 1218-1227 Langues : Anglais (eng) Catégories : [Thématique] Phénologie Mots-clés : Alnus glutinosa (L.) Gaertner Résumé : 1 Delineation of seed zones or provenance regions to preserve local adaptation is a common practice in forestry and restoration, as locally adapted plants generally possess relatively high levels of productivity and resistance. Provenance trials typically quantify the degree of phenotypic divergence among individuals and populations raised under common conditions, which is time-consuming and potentially confounded by phenotypic plasticity and maternal effects. 2 Here, we put forward population genomics, the screening of individual genomes for the genetic signature of adaptation, as a fast and reliable strategy to evaluate seed zone delineation. To illustrate the value of this approach, we quantified the degree of genomic adaptation within and among Belgian black alder Alnus glutinosa provenances and compared results with traditional provenance trials. Distant European reference regions were included to validate the approaches, as larger environmental differences at a European scale are expected to result in larger adaptive responses. 3 Local provenances did not perform better than foreign provenances at the scale of Belgian seed zones, in contrast to the comparisons with the distant European regions. A significant site effect indicated that plastic responses rather than local adaptation explain phenotypic differences among seed zones. The common garden revealed little evidence for adaptation for all measured traits, both among seed zones and among distant regions. 4 The number and strength of genetic outliers was not significantly larger among Belgian seed zones than within these seed zones, but was significantly larger between Belgian seed zones and the distant European reference regions. 5 Synthesis and applications. The lack of adaptive divergence among Belgian seed zones supports an expansion of current provenance regions into larger seed zones. The results also show that population genomics can be an accurate and time-efficient resource to assist decisions on seed sourcing. This highlights the importance of raising awareness of the potential benefits of this novel approach among policy makers, foresters and restoration practitioners. Lien pérenne : DOI : 10.1111/1365-2664.12305
in Journal of applied ecology > 51 (2014) . - 1218-1227De Kort, H., Mergeay, J., Mijnsbrugge Vander, K., Decocq, G., Maccherini, S., Kehlet Bruun, H.H., Honnay, O., Vandepitte, K. 2014. An evaluation of seed zone delineation using phenotypic and population genomic data on black alder Alnus glutinosa. Journal of applied ecology, 51: 1218-1227.
Evaluation of the ecological restoration potential of plant communities in Norway spruce plantations using a life-trait based approach / Bruno Hérault in Journal of applied ecology, 42 ([01/01/2005])
Titre : Evaluation of the ecological restoration potential of plant communities in Norway spruce plantations using a life-trait based approach Type de document : Imprimé Auteurs : Bruno Hérault ; Olivier Honnay ; Daniel Thoen Année de publication : 2005 Article en page(s) : 536-545 Langues : Anglais (eng) Catégories : [Thématique] Restauration des écosystèmes
Mots-clés : Picea abies Note de contenu : 1.In Europe, intensively managed coniferous plantations rarely achieve similar natureconservation functions as deciduous woodlands. The ability to identify coniferous plan-tations that might be successfully converted to deciduous woodland is a key goal in for-est management. The herbaceous plant community composition of mature plantationsmay be an accurate selection criterion for stands that are most suitable for initiating theconversion process to deciduous forest.2.The herbaceous plant communities in Norway spruce plantations were analysedusing a functional group approach. The analysis was conducted in three steps: (i) iden-tification of emergent groups (EG) by multivariate classification; (ii) comparison of EGabundance between coniferous and deciduous stands (i.e. the target communities);(iii) partitioning the variation in EG abundance in coniferous plantations between forestmanagement, local environmental and regional variables.3.Seven EG were identified: two core forest groups (short geophytes and zoochoreousperennials), two groups from open habitats (annuals and helophytes) and three mixedgroups (anemochoreous perennials, graminoids and short perennials).4.Among the core forest groups, short geophytes were severely under-represented inplantations (because of their low dispersal abilities and specific habitat requirements)while zoochoreous perennials were slightly more abundant (because of their gooddispersal and competitive abilities).5.Regional variables largely influenced the abundance of core-forest EG. Restoration ofcommunities rich in zoochoreous perennials is far easier than restoring short geophyte-rich communities because of the different colonization abilities of these EG.6.Forest management variables were of secondary importance for the restorationpotential of plantations. Because generalist EG were favoured by low stand densities,forest practitioners should avoid large thinning operations.7.Local environmental variables played a minor role in determining EG abundance.However, short geophytes preferred rather high soil pH values and were thereforenegatively affected by acidification caused by coniferous litter.8.Synthesis and applications.The performance of short geophytes is the key to conversionsuccess of Norway spruce plantations to deciduous forest. Stands located on base-richsoils and in landscapes with high forest connectivity are the most appropriate candidatesfor initiating the conversion process. For other types of stands, future work should explorethe possibility of restoring other land-use types, such as annually mown meadows. Lien pérenne : DOI : 10.1111/j.1365-2664.2005.01048.x
in Journal of applied ecology > 42 [01/01/2005] . - 536-545Hérault, B., Honnay, O., Thoen, D. 2005. Evaluation of the ecological restoration potential of plant communities in Norway spruce plantations using a life-trait based approach. Journal of applied ecology, 42: 536-545.