Alessia Guggisberg

Last Name

Guggisberg

First Name

Alessia

ORCID

0000-0001-8258-0472

Organisational unit

08670 - Gruppe Biosystematik und Sammlungen

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Publications 1 - 10 of 45

Frische Forschung mit trockenen Pflanzen
Guggisberg, Alessia; Wipf, Sonja (2022)
FloraCH
Die vier grössten Schweizer Herbarien beherbergen knapp 12 Millionen Belege. In diesem Artikel zeigen wir Beispiele, wie Pflanzen von gestern in der Forschung von heute genutzt werden. Les quatre plus grands herbiers suisses rassemblent près de 12 millions de spécimens. Dans cet article, nous montrons comment les échantillons d’autrefois sont utilisés dans la recherche d’aujourd’hui.
Trésors d'herbiers
Mansion, Guilhem; Guggisberg, Alessia (2024)
Une collection de planches d’herbiers est un trésor végétal à la beauté double : intrinsèque, fruit de l’aventure fascinante de la plante, de son évolution, de ses multiples adaptations ou de ses propriétés diverses, et de celle de son récolteur, scientifique, passionné, voyageur ou simple curieux ; extrinsèque, de par la splendeur de l’échantillon, du soin apporté par le collectionneur et de sa mise en valeur par le conservateur. C’est cette odyssée dans l’espace et dans le temps, au travers les mythes et les sciences, que les auteurs proposent au lecteur qui n’a pas la chance de visiter un herbier, en l’occurrence celui des collections de Zurich, avec pour devise : un échantillon, un récit. Avec près de 2,5 millions de spécimens conservés de plantes vasculaires, ce sont plusieurs milliers d’anecdotes que les auteurs auraient pu délivrer ! Ils vous en ont finalement sélectionné cinquante…
Global Phylogeny of the Brassicaceae Provides Important Insights into Gene Discordance
Hendriks, Kasper P.; Kiefer, Christiane; Al-Shehbaz, Ihsan A.; et al. (2022)
bioRxiv
The mustard family (Brassicaceae) is a scientifically and economically important family, containing the model plant Arabidopsis thaliana and numerous crop species that feed billions worldwide. Despite its relevance, most published family phylogenies are incompletely sampled, generally contain massive polytomies, and/or show incongruent topologies between datasets. Here, we present the most complete Brassicaceae genus-level family phylogenies to date (Brassicaceae Tree of Life, or BrassiToL) based on nuclear (>1,000 genes, almost all 349 genera and 53 tribes) and plastome (60 genes, 79% of the genera, all tribes) data. We found cytonuclear discordance between nuclear and plastome-derived phylogenies, which is likely a result of rampant hybridisation among closely and more distantly related species, and highlight rogue taxa. To evaluate the impact of this rampant hybridisation on the nuclear phylogeny reconstruction, we performed four different sampling routines that increasingly removed variable data and likely paralogs. Our resulting cleaned subset of 297 nuclear genes revealed high support for the tribes, while support for the main lineages remained relatively low. Calibration based on the 20 most clock-like nuclear genes suggests a late Eocene to late Oligocene ‘icehouse origin’ of the family. Finally, we propose five new or re-established tribes, including the recognition of Arabidopsideae, a monotypic tribe to accommodate Arabidopsis. With a worldwide community of thousands of researchers working on this family, our new, densely sampled family phylogeny will be an indispensable tool to further highlight Brassicaceae as an excellent model family for studies on biodiversity and plant biology.
Natural history collections for a better understanding of anthropogenic impacts on biodiversity
Guggisberg, Alessia; Fischer, Martin C. (2024)
Book of Abstracts 15. Jahrestagung für Universitätssammlungen 2024
Over the last decades, natural history collec'ons have become increasingly important as windows to the past and for assessing the effects of the Anthropocene on biodiversity. Many ins'tu'ons have therefore started digi'zing their holdings and building vast data infrastructures to retrieve specimen data for various studies, including systema'c, gene'c, and ecological inves'ga'ons. Thanks to these efforts, specimens from Swiss botanical and entomological collec'ons were leveraged for an ongoing study on monitoring gene'c diversity at ETH Zurich. Because gene'c diversity is a key element of biodiversity and is vital for popula'ons to adapt to changing environments, assessing the extent and poten'al consequences of its deple'on over 'me is impera've. Part of this study focused on the hare’s-tail coZongrass (Eriophorum vaginatum) and the false heath fri'llary (Melitaea diamina), both of which have experienced significant habitat and popula'on loss in Switzerland over the past two centuries. More than 400 historic collec'on specimens were analyzed and compared with contemporary samples. The findings revealed local ex'nc'on events and changes in gene'c diversity over 'me and space. This project underscores the importance of natural history collec'ons in elucida'ng the breadth of the anthropogenic impact on biodiversity.
Using historical specimens from collections to assess genetic diversity change
Ulrich, Gabriel F.; Rayo, Enrique; Guggisberg, Alessia; et al. (2023)
The colonial legacy of herbaria
Park, Daniel S.; Feng, Xiao; Akiyama, Shinobu; et al. (2021)
bioRxiv
Herbarium collections shape our understanding of the world’s flora and are crucial for addressing global change and biodiversity conservation. The formation of such natural history collections, however, are not free from sociopolitical issues of immediate relevance. Despite increasing efforts addressing issues of representation and colonialism in natural history collections, herbaria have received comparatively less attention. While it has been noted that the majority of plant specimens are housed in the global North, the extent of this disparity has not been rigorously quantified to date. Here, by analyzing over 85 million specimen records and surveying herbaria across the globe, we assess the colonial legacy of botanical collections and how we may move towards a more inclusive future. We demonstrate that colonial exploitation has contributed to an inverse relationship between where plant biodiversity exists in nature and where it is housed in herbaria. Such disparities persist in herbaria across physical and digital realms despite overt colonialism having ended over half a century ago, suggesting ongoing digitization and decolonization efforts have yet to alleviate colonial-era discrepancies. We emphasize the need for acknowledging the inconvenient history of herbarium collections and the implementation of a more equitable, global paradigm for their collection, curation, and use.
Edaphic adaptation in the ‚omics‘-era
Guggisberg, Alessia; Fischer, Martin C.; Zoller, Stefan; et al. (2013)
The colonial legacy of herbaria
Park, Daniel S.; Feng, Xiao; Akiyama, Shinobu; et al. (2023)
Nature Human Behaviour
Herbarium collections shape our understanding of Earth’s flora and are crucial for addressing global change issues. Their formation, however, is not free from sociopolitical issues of immediate relevance. Despite increasing efforts addressing issues of representation and colonialism in natural history collections, herbaria have received comparatively less attention. While it has been noted that the majority of plant specimens are housed in the Global North, the extent and magnitude of this disparity have not been quantified. Here we examine the colonial legacy of botanical collections, analysing 85,621,930 specimen records and assessing survey responses from 92 herbarium collections across 39 countries. We find an inverse relationship between where plant diversity exists in nature and where it is housed in herbaria. Such disparities persist across physical and digital realms despite overt colonialism ending over half a century ago. We emphasize the need for acknowledging the colonial history of herbarium collections and implementing a more equitable global paradigm for their collection, curation and use.
RAD in the realm of next-generation sequencing technologies
Rowe, Heather C.; Renaut, Sébastien; Guggisberg, Alessia (2011)
Molecular Ecology
Genetically Based Trait Differentiation but Lack of Trade-offs between Stress Tolerance and Performance in Introduced Canada Thistle
Hodgins, Kathryn A.; Guggisberg, Alessia; Nurkowski, Kristin; et al. (2020)
Plant Communications
Trade-offs between performance and tolerance of abiotic and biotic stress have been proposed to explain both the success of invasive species and frequently observed size differences between native and introduced populations. Canada thistle seeds collected from across the introduced North American and the native European range were grown in benign and stressful conditions (nutrient stress, shading, simulated herbivory, drought, and mowing), to evaluate whether native and introduced individuals differ in performance or stress tolerance. An additional experiment assessed the strength of maternal effects by comparing plants derived from field-collected seeds with those derived from clones grown in the glasshouse. Introduced populations tended to be larger in size, but no trade-off of stress tolerance with performance was detected; introduced populations had either superior performance or equivalent trait values and survivorship in the treatment common gardens. We also detected evidence of parallel latitudinal clines of some traits in both the native and introduced ranges and associations with climate variables in some treatments, consistent with recent climate adaptation within the introduced range. Our results are consistent with rapid adaptation of introduced populations, but, contrary to predictions, the evolution of invasive traits did not come at the cost of reduced stress tolerance.

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Alessia Guggisberg

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