Détail de l'auteur
Auteur Christian Lampei |
Documents disponibles écrits par cet auteur (3)
Affiner la rechercheDrought stress triggers differential survival and functional trait responses in the establishment of Arnica montana seedlings / Nils Stanik in Plant biology, 23 (6) (2021)
Titre : Drought stress triggers differential survival and functional trait responses in the establishment of Arnica montana seedlings Type de document : Imprimé Auteurs : Nils Stanik, Auteur ; Christian Lampei, Auteur ; Gert Rosenthal Année de publication : 2021 Article en page(s) : 1086-1096 Mots-clés : Arnica montana L. Résumé : The establishment and survival of seedlings are critical stages in the life cycle of plants and therefore usually well timed to humid and favourable conditions. Climate projections suggest that the threatened mountain grassland species Arnica montana may be increasingly exposed to drought stress. However, studies that focus on the species' early development are missing. We evaluated impacts of drought-induced stress on A. montana seedlings in their early establishment phase and identified traits that could cause the species' fitness to decline. In a greenhouse experiment, we tested the response of A. montana seedlings to different drought levels (moderate, strong, extreme). To assess their fitness under increasing drought, we evaluated survival of the seedlings based on four senescence stages and measured the performance of above- and belowground morphological and physiological functional traits. Arnica montana seedlings showed high resistance to drought. Senescence accelerated and survival declined only under strong and extreme drought conditions. However, the seedlings' vegetative performance decreased even with moderate drought, as indicated by smaller values of most leaf traits and some root traits. Physiological trait response was less sensitive. Drought stress hinders the establishment and survival of A. montana seedlings. Following the functional trait responses to drought and their association with survival, we suggest declining leaf length, leaf width, and leaf number are sensitive traits that can lead to a decline in performance. Identifiant : DOI : 10.1111/plb.13306 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=156226
in Plant biology > 23 (6) (2021) . - 1086-1096Stanik, N., Lampei, C., Rosenthal, G., 2021 . Drought stress triggers differential survival and functional trait responses in the establishment of Arnica montana seedlings. Plant biology, 23(6): 1086-1096.Documents numériques
Article (2021)URL
Titre : Evolution during seed production for ecological restoration ? : A molecular analysis of 19 species finds only minor genomic changes Type de document : Numérique 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.
Identifiant : 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, M., Lampei, C., Bossdorf, O., Durka, W., Bucharova, A., 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)URL
Titre : Summer aridity rather than management shapes fitness-related functional traits of the threatened mountain plant Arnica montana Type de document : Imprimé Auteurs : Nils Stanik ; Christian Lampei ; Gert Rosenthal Année de publication : 2020 Article en page(s) : 5069-5078 Langues : Français (fre) Catégories : [CBNPMP-Thématique] Changement climatique Mots-clés : Arnica montana L., 1753 Résumé : Semi-natural mountain grasslands are increasingly exposed to environmental stress under climate change. However, which are the environmental factors that limit plants in these grasslands? Also, is the present management effective against these changes? Fitness-related functional traits may offer a way to detect changes in performance and provide new insights into their vulnerability to climate change. We investigated changes in performance and variability of functional traits of the mountain grassland target species Arnica montana along a climate gradient in Central German low mountain ranges. This gradient represents at its lower end climate conditions that are expected at its upper end under future climate change. We measured vegetative, generative, and physiological traits to account for multiple ways of plant responses to the environment. Using mixed effects and multivariate models, we evaluated changes in trait values among individuals as well as the variability of their populations in order to assess performance under changing summer aridity and different management regimes. Fitness-related performance of most traits showed strongly positive associations with reduced summer aridity at higher elevations, while only specific leaf area and leaf dry matter content showed no association. This suggests a higher performance level at less arid montane sites and that the physiological traits are less sensitive to this climate change factor. The coefficient of variation of almost all traits declined steadily with decreasing site aridity. We suggest that this reduced variability indicates a lower environmental stress level for A. montana toward its environmental optimum at montane elevations, especially because the trait performance increased simultaneously. Surprisingly, management factors and habitat characteristics had only low influence on both trait performance and variability. In summary, summer aridity had a stronger effect to shape the trait performance and variability of A. montana under increased environmental stress than management and other habitat characteristics. Identifiant : DOI : 10.1002/ece3.6259 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=148027
in Ecology and evolution > 10 (11) (2020) . - 5069-5078Stanik, N., Lampei, C., Rosenthal, G., 2020 . Summer aridity rather than management shapes fitness-related functional traits of the threatened mountain plant Arnica montana. Ecology and evolution, 10(11): 5069-5078.Documents numériques
Article (2020)URL
