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Auteur Walter Durka |
Documents disponibles écrits par cet auteur (5)
Affiner la rechercheAre local plants the best for ecosystem restoration? It depends on how you analyze the data / Anna Bucharova (2017)
Titre : Are local plants the best for ecosystem restoration? It depends on how you analyze the data Type de document : Tiré à part de revue Auteurs : Anna Bucharova, Auteur ; Walter Durka, Auteur ; Norbert Hölzel (1963-), Auteur ; Johannes Kollmann (1963-), Auteur ; Stefan Michalski, Auteur ; Oliver Bossdorf, Auteur Année de publication : 2017 Importance : 7 p. Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Revégétalisation Lien pérenne : DOI : 10.1002/ece3.3585 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=144175 Bucharova, Anna, Durka, Walter, Hölzel, Norbert (1963-), Kollmann, Johannes (1963-), Michalski, Stefan, Bossdorf, Oliver 2017 Are local plants the best for ecosystem restoration? It depends on how you analyze the data. Ecology and evolution, 7(24) : 7 p..Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 28187 B. Tiré à part Centre de documentation Tirés à part Consultable Documents numériques
Consultable
Article (2017)URLBIOLFLOR / Stefan Klotz (2002)
Titre : BIOLFLOR : eine Datenbank mit biologisch-ökologischen Merkmalen zur Flora von Deutschland Type de document : Imprimé Auteurs : Stefan Klotz ; Ingolf Kühn ; Walter Durka Editeur : Bonn : Bundesamt für Naturschutz Année de publication : 2002 Collection : Schriftenreihe für Vegetationskunde num. 38 Importance : 334 p. Accompagnement : 1 CD-ROM ISBN/ISSN/EAN : 978-3-7843-3508-7 Langues : Allemand (ger) Catégories : [CBNPMP-Géographique] Allemagne
[CBNPMP-Thématique] Base de données
[CBNPMP-Thématique] HabitatsPermalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=149895 Klotz, Stefan, Kühn, Ingolf, Durka, Walter , 2002. BIOLFLOR : eine Datenbank mit biologisch-ökologischen Merkmalen zur Flora von Deutschland. Bundesamt für Naturschutz, Bonn. 334 pp. + 1 CD-ROMExemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 28466 8040 KLO Livre Bureaux Natura 2000 Consultable Evolution during seed production for ecological restoration ? / Malte Conrady in Journal of applied ecology, 59 (5) (May 2022)
Titre : Evolution during seed production for ecological restoration ? : A molecular analysis of 19 species finds only minor genomic changes Type de document : Électronique Auteurs : Malte Conrady ; Christian Lampei ; Oliver Bossdorf ; Walter Durka ; Anna Bucharova Année de publication : 2022 Article en page(s) : 1-11 Catégories : [CBNPMP-Thématique] Graines
[CBNPMP-Thématique] Restauration des écosystèmes
[CBNPMP-Thématique] Revégétalisation
[CBNPMP-Thématique] Diversité génétiqueRésumé : A growing number of restoration projects require large amounts of seeds. As harvesting natural populations cannot cover the demand, wild plants are often propagated in large-scale monocultures. There are concerns that this cultivation process may cause genetic drift and unintended selection, altering the genetic properties of the cultivated populations and reducing their genetic diversity. Such changes could reduce the pre-existing adaptation of restored populations and limit their adaptability to environmental change. We used single nucleotide polymorphism (SNP) markers and a pool-sequencing approach to test for genetic differentiation and changes in gene diversity during cultivation in 19 wild grassland species, comparing source populations and up to four consecutive cultivation generations. We linked the magnitudes of genetic changes to the species' breeding systems and seed dormancy to understand the roles of these traits in genetic change. Cultivation changed the genetic composition across cultivated generations only moderately. The genetic differentiation resulting from cultivation was much lower than the natural genetic differentiation between different source regions. The propagated generations harboured even higher gene diversity than wild-collected seeds. Genetic change was stronger in self-compatible than self-incompatible species, probably due to increased outcrossing in monocultures. Synthesis and applications. Our study suggests that large-scale seed production maintains the genetic integrity of natural populations. Increased genetic diversity may even indicate increased adaptive potential of propagated seeds, which would make them especially suitable for ecological restoration. Yet, it remains to be tested whether these molecular patterns will be mirrored also by plant phenotypes. Further, we used seeds from Germany and Austria, where the seed production is regulated and certified, and we do not know yet whether other seed production systems perform equally well.
Lien pérenne : DOI : 10.1111/1365-2664.14155 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=148373
in Journal of applied ecology > 59 (5) (May 2022) . - 1-11Conrady, Malte, Lampei, Christian, Bossdorf, Oliver, Durka, Walter, Bucharova, Anna 2022 Evolution during seed production for ecological restoration ? : A molecular analysis of 19 species finds only minor genomic changes. Journal of applied ecology, 59(5): 1-11.Documents numériques
Article (2022)URLMix and match: regional admixture provenancing strikes a balance among different seed-sourcing strategies for ecological restoration / Anna Bucharova (2018)
Titre : Mix and match: regional admixture provenancing strikes a balance among different seed-sourcing strategies for ecological restoration Type de document : Électronique Auteurs : Anna Bucharova ; Oliver Bossdorf ; Norbert Hölzel (1963-) ; Johannes Kollmann (1963-) ; Rüdiger Prasse ; Walter Durka Année de publication : 2018 Importance : 7-17 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Revégétalisation Résumé : One of the main questions in ecosystem restoration is where to obtain the seeds to re-establish plant communities. While the most commonly advocated approach is to use seeds from local sources, some experts argue against this because local populations may harbour little genetic variability for the restored populations to be able to adapt to and survive global change. Instead, they propose alternative strategies such as mixing seeds from various sources to increase genetic variability and adaptive potential, or using seeds from populations that have a similar climate as predicted for the target locality in the future. All these alternative seed-sourcing strategies have in common that they involve a transplanting of plant ecotypes, sometimes over large spatial scales. This is risky because plants from distant origins may be maladapted to the current local abiotic and biotic environment. In addition, introduction of non-local provenances will disrupt natural patterns of withinspecies biodiversity and will affect ecological networks, with unpredictable consequences. To balance the value of local adaptation with the need for future adaptation potential, we propose ‘regional admixture provenancing’ as a compromise strategy. Here seeds are sourced from multiple populations within the same region as the target locality and mixed prior to use. The mixing of seeds will increase the genetic diversity necessary for future adaptation, while restricting seed origins to a regional scale will maintain regional adaptation and reduce the risk of unintended effects on other biota. This approach is feasible in practice and has recently been implemented in Germany. We believe that it represents a compromise to reconcile opposing views on ecological restoration. Lien pérenne : DOI : 10.1007/s10592-018-1067-6 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=145129 Bucharova, Anna, Bossdorf, Oliver, Hölzel, Norbert (1963-), Kollmann, Johannes (1963-), Prasse, Rüdiger, Durka, Walter , 2018. Mix and match: regional admixture provenancing strikes a balance among different seed-sourcing strategies for ecological restoration. , . 7-17
Titre : Rapid evolution in native plants cultivated for ecological restoration: not a general pattern Type de document : Imprimé Auteurs : R. Nagel ; Walter Durka ; Anna Bucharova Année de publication : 2019 Article en page(s) : 551-558 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Restauration des écosystèmes
[CBNPMP-Thématique] RevégétalisationRésumé : The growing number of restoration projects worldwide increases the demand for seed material of native species. To meet this demand, seeds are often produced through large-scale cultivation on specialised farms, using wild-collected seeds as the original sources. However, during cultivation, plants experience novel environmental conditions compared to those in natural populations, and there is a danger that the plants in cultivation are subject to unintended selection and lose their adaptation to natural habitats. Although the propagation methods are usually designed to maintain as much natural genetic diversity as possible, the effectiveness of these measures have never been tested. We obtained seed of five common grassland species from one of the largest native seed producers in Germany. For each species, the seeds were from multiple generations of seed production. We used AFLP markers and a common garden experiment to test for genetic and phenotypic changes during cultivation of these plants. The molecular markers detected significant evolutionary changes in three out of the five species and we found significant phenotypic changes in two species. The only species that showed substantial genetic and phenotypic changes was the short-lived and predominantly selfing Medicago lupulina, while in the other, mostly perennial and outcrossing species, the observed changes were mostly minor. Agricultural propagation of native seed material for restoration can cause evolutionary changes, at least in some species. We recommend caution, particularly in selfing and short-lived species, where evolution may be more rapid and effects may thus be more severe.
Lien pérenne : DOI : 10.1111/plb.12901 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=148819
in Plant biology > 21 (3) (2019) . - 551-558Nagel, R., Durka, Walter, Bucharova, Anna 2019 Rapid evolution in native plants cultivated for ecological restoration: not a general pattern. Plant biology, 21(3): 551-558.Documents numériques
Article (2019)URL
