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Auteur Julia-Maria Hermann |
Documents disponibles écrits par cet auteur (3)
Affiner la rechercheGenetic differentiation and regional adaptation among seed origins used for grassland restoration: Lessons from a multispecies transplant experiment / Anna Bucharova (2016)
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
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Article (2016)URLGenetic differentiation within multiple common grassland plants supports seed transfer zones for ecological restoration / Walter Durka in Journal of applied ecology, 54 (1) (2017)
Titre : Genetic differentiation within multiple common grassland plants supports seed transfer zones for ecological restoration Type de document : Numérique Auteurs : Walter Durka ; Stefan Michalski ; Kenneth W. Berendzen ; Oliver Bossdorf ; Anna Bucharova ; Julia-Maria Hermann ; Norbert Hölzel (1963-) ; Johannes Kollmann (1963-) Année de publication : 2017 Article en page(s) : 116-126 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Restauration des écosystèmes
[CBNPMP-Thématique] RevégétalisationRésumé : Ecological restoration of grasslands is increasingly based on regional seeds derived from predefined seed transfer zones. However, the degree and spatial pattern of genetic differentiation among provenances of different seed transfer zones is largely unknown.
We assessed the genetic differentiation among eight out of 22 German seed transfer zones for seven common grassland species (Arrhenatherum elatius, Centaurea jacea, Daucus carota, Galium album, Hypochaeris radicata, Knautia arvensis and Lychnis flos-cuculi) using AFLP markers. We analysed genetic population structure with AMOVA and Bayesian cluster analysis and tested for isolation by distance and isolation by environment.
In all of the investigated species, almost all pairs of provenances were genetically differentiated. Bayesian cluster analysis revealed species-specific numbers and spatial patterns of gene pools, with between two (Arrhenatherum) and eight clusters (Lychnis). Most investigated seed transfer zones represented a unique gene pool in the majority of the species.
We found isolation by distance in four species, isolation by environment, driven by climatic seasonality, in three species, and a lack of both in three species. Thus, the observed genetic differentiation appears to be caused by both neutral and adaptive processes.
Synthesis and applications. Our study shows that grassland plants are indeed strongly genetically differentiated across Germany supporting the strategy of seed transfer zones for ecological restoration. Although the predefined seed transfer zones are unlikely to match the exact genetic structure of many species, they serve their purpose by capturing a substantial amount of intraspecific genetic variation across species.Lien pérenne : DOI : 10.1111/1365-2664.12636 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=155159
in Journal of applied ecology > 54 (1) (2017) . - 116-126Durka, Walter, Michalski, Stefan, Berendzen, Kenneth W., Bossdorf, Oliver, Bucharova, Anna, Hermann, Julia-Maria, Hölzel, Norbert (1963-), Kollmann, Johannes (1963-) 2017 Genetic differentiation within multiple common grassland plants supports seed transfer zones for ecological restoration. Journal of applied ecology, 54(1): 116-126.
Titre : Plants adapted to warmer climate do not outperform regional plants during a natural heat wave Type de document : Imprimé Auteurs : Anna Bucharova ; Walter Durka ; Julia-Maria Hermann ; Norbert Hölzel (1963-) ; Stefan Michalski ; Johannes Kollmann (1963-) ; Oliver Bossdorf Année de publication : 2016 Article en page(s) : 4160-4165 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Changement climatique
[CBNPMP-Thématique] Adaptation naturelle au climat, rayonnement, humidité, C02, ventRésumé : With ongoing climate change, many plant species may not be able to adapt rapidly enough, and some conservation experts are therefore considering to translocate warm-adapted ecotypes to mitigate effects of climate warming. Although this strategy, called assisted migration, is intuitively plausible, most of the support comes from models, whereas experimental evidence is so far scarce. Here we present data on multiple ecotypes of six grassland species, which we grew in four common gardens in Germany during a natural heat wave, with temperatures 1.4–2.0°C higher than the long-term means. In each garden we compared the performance of regional ecotypes with plants from a locality with long-term summer temperatures similar to what the plants experienced during the summer heat wave. We found no difference in performance between regional and warm-adapted plants in four of the six species. In two species, regional ecotypes even outperformed warm-adapted plants, despite elevated temperatures, which suggests that translocating warm-adapted ecotypes may not only lack the desired effect of increased performance but may even have negative consequences. Even if adaptation to climate plays a role, other factors involved in local adaptation, such as biotic interactions, may override it. Based on our results, we cannot advocate assisted migration as a universal tool to enhance the performance of local plant populations and communities during climate change. Lien pérenne : DOI : 10.1002/ece3.2183 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=155160
in Ecology and evolution > 6 (23) (2016) . - 4160-4165Bucharova, Anna, Durka, Walter, Hermann, Julia-Maria, Hölzel, Norbert (1963-), Michalski, Stefan, Kollmann, Johannes (1963-), Bossdorf, Oliver 2016 Plants adapted to warmer climate do not outperform regional plants during a natural heat wave. Ecology and evolution, 6(23): 4160-4165.Documents numériques
Article (2016)URL
