A 2000 year long seasonal record of floods in the southern European Alps

International audienceKnowledge of past natural flood variability and controlling climate factors is of high value since it can be useful to refine projections of the future flood behavior under climate warming. In this context, we present a seasonally resolved 2000 year long flood frequency and intensity reconstruction from the southern Alpine slope (North Italy) using annually laminated (varved) lake sediments. Floods occurred predominantly during summer and autumn, whereas winter and spring events were rare. The all-season flood frequency and, particularly, the occurrence of summer events increased during solar minima, suggesting solar-induced circulation changes resembling negative conditions of the North Atlantic Oscillation as controlling atmospheric mechanism. Furthermore, the most extreme autumn events occurred during a period of warm Mediterranean sea surface temperature. Interpreting these results in regard to present climate change, our data set proposes for a warming scenario, a decrease in summer floods, but an increase in the intensity of autumn floods at the South-Alpine slope

Translating Scientific Articles to the Non-scientific Public Using the Wikipedia Encyclopedia

The multilingual, web-based Wikipedia free Encyclopedia is used worldwide by people from different audience. It is openly editable, allowing quick updates. We used these properties as an educational tool in University classrooms, where students' assignment was to rephrase scientific articles for the public. We share here our teaching experience with an Earth Sciences class, based on class assessments and students evaluations. During the 2017 Fall semester, a 1 ECTS MSc level reading seminar on the broad topic of Heat and Mass Transfers in Magmatology was taught for 6 weeks at ETH Zürich. Three first semester and six third semester M.Sc. students have attended the course. All students had a B.Sc. degree in Earth Sciences, among which seven had their main specialisation in Mineralogy and Geochemistry and two had their major in Geophysics. By groups of two, students have read a scientific article, presented it orally to classmates and answered questions from their peers. During the last two classes, students have edited and created Wikipedia Encyclopedia pages in relation to their article's topic. Students really enjoyed creating a Wikipedia page, even if they didn't use it before or didn't trust the Wikipedia content. They had little experience with communication to a non-scientific audience and considered this exercise was challenging. Evaluations show that writing about a scientific paper in a Wikipedia page is a less efficient learning technique than reading a scientific article, presenting it orally or listening to such a presentation. However, it certainly contributes to better memorise important information, it is an efficient way to practice writing and public and scientific communication skills and it encourages students to work collaboratively on real-time projects. The teachers can use those combined effects as a multi-channel learning technique. It is also highly motivating for the students and the teacher to have a class exercise using modern media techniques with the potential to reach a wide international community. With this article, we wish to encourage colleagues to teach students how to communicate science, to scientific peers and to the non-scientific public. This promotes high-quality education and helps reducing inequality, two sustainable development global goals

Corrigendum to: "Variations of sedimentary Fe and Mn fractions under changing lake mixing regimes, oxygenation and land surface processes during Late-glacial and Holocene times" [Sci. Total Environ. 755 (2021) 143418].

ISSN:0048-9697ISSN:1879-102

Holocene climate, fire and vegetation dynamics at the treeline in the Northwestern Swiss Alps

Treelines are expected to rise to higher elevations with climate warming; the rate and extent however are still largely unknown. Here we present the first multi-proxy palaeoecological study from the treeline in the Northwestern Swiss Alps that covers the entire Holocene. We reconstructed climate, fire and vegetation dynamics at Iffigsee, an alpine lake at 2,065m a.s.l., by using seismic sedimentary surveys, loss on ignition, visible spectrum reflectance spectroscopy, pollen, spore, macrofossil and charcoal analyses. Afforestation with Larix decidua and tree Betula (probably B. pendula) started at ~9,800cal. b.p., more than 1,000years later than at similar elevations in the Central and Southern Alps, indicating cooler temperatures and/or a high seasonality. Highest biomass production and forest position of ~2,100-2,300m a.s.l. are inferred during the Holocene Thermal Maximum from 7,000 to 5,000cal. b.p. With the onset of pastoralism and transhumance at 6,800-6,500cal. b.p., human impact became an important factor in the vegetation dynamics at Iffigsee. This early evidence of pastoralism is documented by the presence of grazing indicators (pollen, spores), as well as a wealth of archaeological finds at the nearby mountain pass of Schnidejoch. Human and fire impact during the Neolithic and Bronze Ages led to the establishment of pastures and facilitated the expansion of Picea abies and Alnus viridis. We expect that in mountain areas with land abandonment, the treeline will react quickly to future climate warming by shifting to higher elevations, causing drastic changes in species distribution and composition as well as severe biodiversity losses

Use of AFLP markers to estimate molecular diversity of Phakopsora pachyrhizi

Background: Asian soybean rust (SBR) caused by Phakopsora pachyrhizi Syd. & Syd., is one of the main diseases affecting soybean and has been reported as one of the most economically important fungal pathogens worldwide. Knowledge of the genetic diversity of this fungus should be considered when developing resistance breeding strategies. We aimed to analyze the genetic diversity of P. pachyrhizi combining simple sampling with a powerful and reproducible molecular technique. Results: We employed Amplified Fragment Length Polymorphism (AFLP) technique for the amplification of P. pachyrhizi DNA extracted from naturally SBR-infected plants from 23 production fields. From a total of 1919 markers obtained, 77% were polymorphic. The high percentage of polymorphism and the Nei's genetic diversity coefficient (0.22) indicated high pathogen diversity. Analysis of molecular variance showed higher genetic variation within countries than among them. Temporal analysis showed a higher genetic variation within a year than between years. Cluster, phylogenetic and principal co-ordinate analysis showed that samples group by year of collection and then by country sampled. Conclusions: The study proposed combining a simple collection of urediniospore with a subsequent analysis by AFLP was useful to examine the molecular polymorphism of samples of P. pachyrhizi collected and might have a significant contribution to the knowledge of its genetic diversity. Also, AFLP analysis is an important and potent molecular tool for the study of genetic diversity and could be useful to carry out wider genetic diversity studies

Translating scientific articles to the non-scientific public using the Wikipedia Encyclopedia

The multilingual, web-based Wikipedia free Encyclopedia is used worldwide by people from different audience. It is openly editable, allowing quick updates. We used these properties as an educational tool in University classrooms, where students' assignment was to rephrase scientific articles for the public. We share here our teaching experience with an Earth Sciences class, based on class assessments and students evaluations. During the 2017 Fall semester, a 1 ECTS MSc level reading seminar on the broad topic of Heat and Mass Transfers in Magmatology was taught for 6 weeks at ETH Zürich. Three first semester and six third semester M.Sc. students have attended the course. All students had a B.Sc. degree in Earth Sciences, among which seven had their main specialisation in Mineralogy and Geochemistry and two had their major in Geophysics. By groups of two, students have read a scientific article, presented it orally to classmates and answered questions from their peers. During the last two classes, students have edited and created Wikipedia Encyclopedia pages in relation to their article's topic. Students really enjoyed creating a Wikipedia page, even if they didn't use it before or didn't trust the Wikipedia content. They had little experience with communication to a non-scientific audience and considered this exercise was challenging. Evaluations show that writing about a scientific paper in a Wikipedia page is a less efficient learning technique than reading a scientific article, presenting it orally or listening to such a presentation. However, it certainly contributes to better memorise important information, it is an efficient way to practice writing and public and scientific communication skills and it encourages students to work collaboratively on real-time projects. The teachers can use those combined effects as a multi-channel learning technique. It is also highly motivating for the students and the teacher to have a class exercise using modern media techniques with the potential to reach a wide international community. With this article, we wish to encourage colleagues to teach students how to communicate science, to scientific peers and to the non-scientific public. This promotes high-quality education and helps reducing inequality, two sustainable development global goals.ISSN:2504-284

Presentation_2_Translating Scientific Articles to the Non-scientific Public Using the Wikipedia Encyclopedia.pptx

The multilingual, web-based Wikipedia free Encyclopedia is used worldwide by people from different audience. It is openly editable, allowing quick updates. We used these properties as an educational tool in University classrooms, where students' assignment was to rephrase scientific articles for the public. We share here our teaching experience with an Earth Sciences class, based on class assessments and students evaluations. During the 2017 Fall semester, a 1 ECTS MSc level reading seminar on the broad topic of Heat and Mass Transfers in Magmatology was taught for 6 weeks at ETH Zürich. Three first semester and six third semester M.Sc. students have attended the course. All students had a B.Sc. degree in Earth Sciences, among which seven had their main specialisation in Mineralogy and Geochemistry and two had their major in Geophysics. By groups of two, students have read a scientific article, presented it orally to classmates and answered questions from their peers. During the last two classes, students have edited and created Wikipedia Encyclopedia pages in relation to their article's topic. Students really enjoyed creating a Wikipedia page, even if they didn't use it before or didn't trust the Wikipedia content. They had little experience with communication to a non-scientific audience and considered this exercise was challenging. Evaluations show that writing about a scientific paper in a Wikipedia page is a less efficient learning technique than reading a scientific article, presenting it orally or listening to such a presentation. However, it certainly contributes to better memorise important information, it is an efficient way to practice writing and public and scientific communication skills and it encourages students to work collaboratively on real-time projects. The teachers can use those combined effects as a multi-channel learning technique. It is also highly motivating for the students and the teacher to have a class exercise using modern media techniques with the potential to reach a wide international community. With this article, we wish to encourage colleagues to teach students how to communicate science, to scientific peers and to the non-scientific public. This promotes high-quality education and helps reducing inequality, two sustainable development global goals.</p