Détail de l'auteur
Auteur Johannes Kollmann (1963-) |
Documents disponibles écrits par cet auteur (9)
Affiner la rechercheAn evolutionary perspective of biological invasions / Bernd Hänfling (2002)
Titre : An evolutionary perspective of biological invasions Type de document : Tiré à part de revue Auteurs : Bernd Hänfling ; Johannes Kollmann (1963-) Année de publication : 2002 Importance : 545-546 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=131455 Hänfling, Bernd, Kollmann, Johannes (1963-) 2002 An evolutionary perspective of biological invasions. Trends in ecology & evolution, 12(17) : 545-546.
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)
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Article (2017)URLEffects of virus infection on growth of the invasive alien Impatiens glandulifera / Johannes Kollmann in Preslia, 79 (2007)
Titre : Effects of virus infection on growth of the invasive alien Impatiens glandulifera Type de document : Électronique Auteurs : Johannes Kollmann (1963-) ; Maria José Bañuelos ; Steen Lykke Nielsen Année de publication : 2007 Article en page(s) : 33-44 Langues : Français (fre) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Impatiens glandulifera Royle Résumé : The absence of fungal or viral diseases of some invasive alien plants partially explains their success. However, for several species this issue has not been studied and no account of such infections are recorded for Impatiens glandulifera, a problematic weed in moist and half-open habitats of central and western Europe. We record for the first time viral infections in plants from different European regions grown in a common garden experiment. The infection was systemic and could be transferred to two species of Chenopodium and five species of Nicotiana, and resulted in the development of local necrotic spots within a week. The symptoms resembled Tobacco Rattle Virus, but this was not confirmed by an ELISA-test. In I. glandulifera the virus led to reduced above-ground biomass. Relative stem biomass and basal diameter were also lower in diseased plants, but therewas no significant differences in plant height and number of main branches. Also virus infection did not affect the following reproductive traits: time to flowering, pollen viability, fruit abortion, seed/ovule ratio, seed number per fruit and individual seed mass. This virus was not transmitted via seed. The potential effects of such viral infections on the population dynamics and biological control of this alien plant are discussed. Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=142461
in Preslia > 79 (2007) . - 33-44Kollmann, Johannes (1963-), Bañuelos, Maria José, Nielsen, Steen Lykke 2007 Effects of virus infection on growth of the invasive alien Impatiens glandulifera. Preslia, 79: 33-44.Documents numériques
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Article (2007)Adobe Acrobat PDF
Titre : Genetic differentiation and regional adaptation among seed origins used for grassland restoration: Lessons from a multispecies transplant experiment Type de document : Tiré à part de revue Auteurs : Anna Bucharova, Auteur ; Stefan Michalski, Auteur ; Julia-Maria Hermann, Auteur ; Karola Heveling, Auteur ; Norbert Hölzel (1963-), Auteur ; Johannes Kollmann (1963-), Auteur ; Oliver Bossdorf, Auteur Année de publication : 2016 Importance : 1-10 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Revégétalisation Résumé : One of the key questions in ecosystem restoration is the choice of seed material for restoring plant communities. More and more scientists and practitioners are currently advocating the use of regional seed sources, based on the argument that plants are often adapted to local or regional environmental conditions, and thus, regional seed sources should provide the best restoration success. However, there is still substantial debate about this approach, partly because of a lack of solid empirical data. We conducted a multispecies transplant experiment in which we compared the performance of eight seed origins of seven plant species frequently used in grassland restoration in four common gardens across Germany. We found that, on average, plants of regional origins produced 10% more inflorescences and 7% more biomass than those of foreign origins. There were substantial differences among species in the strength of these effects, but in the majority of the study species fitness decreased with increasing geographical distance of seed origins or with increasing climatic differences between plant origins and experimental sites. In addition to these effects on plant fitness, increasing geographical or climatic distances of origin were often also correlated with increasing differences in plant phenology. Since phenology is important for biotic interactions, especially with pollinators and seed predators, using foreign seed sources may have cascading effects on local ecosystems. Synthesis and applications. Genetic differentiation is widespread in grassland species and often shows the patterns of regional adaptation. Our study thus supports the use of regional seed sources in restoration. Moreover, using non-regional seed sources in grassland restoration may not only decrease the performance of plants, but it will likely also affect their biotic interactions.
Lien pérenne : DOI : 10.1111/1365-2664.12645 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=144176 Bucharova, Anna, Michalski, Stefan, Hermann, Julia-Maria, Heveling, Karola, Hölzel, Norbert (1963-), Kollmann, Johannes (1963-), Bossdorf, Oliver 2016 Genetic differentiation and regional adaptation among seed origins used for grassland restoration: Lessons from a multispecies transplant experiment. Journal of applied ecology, 54(1) : 1-10.Documents numériques
Article (2016)URL
Titre : Genetic introgression from distant provenances reduces fitness in local weed populations Type de document : Tiré à part de revue Auteurs : M Keller ; Johannes Kollmann (1963-) ; Peter John Edwards (1948-) Année de publication : 2000 Importance : 647-659 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Messicole Résumé : 1. Seed mixtures of wildflowers are used increasingly in schemes to restore biodiversity in intensively managed farmland. Usually, the seed mixtures are produced by commercial suppliers and they may be distributed over large geographical distances. It is therefore important to ask what problems may arise from using seed that is not of local origin. The aim of this study was to evaluate one potential problem, namely the effects of genetic introgression of foreign provenances on the fitness of local weed populations. 2. The problem was investigated using the arable weed species Agrostemma githago, Papaver rhoeas and Silene alba, all of which are commonly included in commercial seed mixtures in Switzerland. Hybrids (F1 and F2 backcrosses) were made between local Swiss plants and plants of English, German and Hungarian provenance (plus F1 from one US source in Silene). In a field experiment the growth of the hybrid plants was compared with that of the parents. Above-ground dry matter after one growing season was taken as a measure of fitness. Additionally, survivorship and seed mass were determined for some of the hybrids. 3. The biomass data revealed negative outbreeding effects caused by epistasis in all four F2 backcrosses of Papaver and in the F2 of Agrostemma hybridized with plants of German provenance; no such effects were found in Silene. Survival was slightly lower in the F1 hybrids of Papaver, and considerably reduced in the F2 backcrosses. For Silene, a heterosis effect was evident in seed mass in the F1 generation, while seed mass decreased in the F2. The same trend, although less strong, was also observed in Agrostemma. 4. The results suggest that only plants of relatively local origin should be used in wildflower mixtures, although it is not possible to specify precisely over what distance seed can safely be transferred. The same recommendation is also valid for schemes to reinvigorate endangered plant populations. The relevance of the fitness components that were measured, and the long-term effects of genetic introgressions, are discussed. Lien pérenne : DOI : 10.1046/j.1365-2664.2000.00517.x Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=131648 Keller, M, Kollmann, Johannes (1963-), Edwards, Peter John (1948-) 2000 Genetic introgression from distant provenances reduces fitness in local weed populations. Journal of applied ecology, 37 : 647-659.Documents numériques
Article (2000)URL
PermalinkMix and match: regional admixture provenancing strikes a balance among different seed-sourcing strategies for ecological restoration / Anna Bucharova (2018)
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