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Université de Fribourg

Biodiversity effects on grape quality depend on variety and management intensity

Steiner, Magdalena ; Grace, James B. ; Bacher, Sven

In: Journal of Applied Ecology, 2021, p. 1-13

1. Interactions between plants can be beneficial, detrimental or neutral. In agricultural systems, competition between crop and spontaneous vegetation is a major concern. We evaluated the relative support for three non-exclusive ecological hypotheses about interactions between crop and spontaneous plants based on competition, complementarity or facilitation. 2. The study was conducted in...

Université de Fribourg

The rise of angiosperms pushed conifers to decline during global cooling

Condamine, Fabien L. ; Silvestro, Daniele ; Koppelhus, Eva B. ; Antonelli, Alexandre

In: Proceedings of the National Academy of Sciences, 2020, vol. 117, no. 46, p. 28867–28875

Competition among species and entire clades can impact species diversification and extinction, which can shape macroevolutionary patterns. The fossil record shows successive biotic turnovers such that a dominant group is replaced by another. One striking example involves the decline of gymnosperms and the rapid diversification and ecological dominance of angiosperms in the Cretaceous. It is...

Université de Fribourg

InvasiBES: Understanding and managing the impacts of Invasive alien species on Biodiversity and Ecosystem Services

Gallardo, Belinda ; Bacher, Sven ; Bradley, Bethany ; Comín, Francisco A. ; Gallien, Laure ; Jeschke, Jonathan M. ; Sorte, Cascade J. B. ; Vilà, Montserrat

In: NeoBiota, 2019, vol. 50, p. 109–122

Invasive Alien Species (IAS) are amongst the most significant drivers of species extinction and ecosystem degradation, causing negative impacts on ecosystem services and human well-being. InvasiBES, a project funded by BiodivERsA-Belmont Forum for 2019–2021, will use data and models across scales, habitats and species to understand and anticipate the multi-faceted impacts of IAS and to...

Université de Fribourg

Multitier self-consistent $GW+\text{EDMFT}$

Nilsson, Fredrik ; Boehnke, Lewin ; Werner, Philipp ; Aryasetiawan, Ferdi

In: Physical Review Materials, 2017, vol. 1, no. 4, p. 043803

We discuss a parameter-free and computationally efficient ab initio simulation approach for moderately and strongly correlated materials, the multitier self-consistent GW+EDMFT method. This scheme treats different degrees of freedom, such as high- energy and low-energy bands, or local and nonlocal interactions, within appropriate levels of approximation, and provides a fully self-consistent...

Université de Fribourg

Multi-scale imaging of a slow active fault zone: contribution for improved seismic hazard assessment in the Swiss Alpine foreland

Vouillamoz, Naomi ; Mosar, Jon ; Deichmann, Nicholas

In: Swiss Journal of Geosciences, 2017, vol. 110, no. 2, p. 547–563

Seismic hazard assessment of slow active fault zones is challenging as usually only a few decades of sparse instrumental seismic monitoring is available to characterize seismic activity. Tectonic features linked to the observed seismicity can be mapped by seismic imaging techniques and/or geomorphological and structural evidences. In this study, we investigate a seismic lineament located in...

Université de Fribourg

Reinterpretation of the mechanical reinforcement of polymer nanocomposites reinforced with cellulose nanorods

Sapkota, Janak ; Garcia, Julio Cesar Martinez ; Lattuada, Marco

In: Journal of Applied Polymer Science, 2017, vol. 134, no. 35, p. -

The mechanical reinforcement of nanocomposites containing nanorods-like fillers such as cellulose nanocrystals (CNCs) isoften interpreted by adapting the classical parallel–series model, assuming a simple hyperbolic dependence between the percolationthreshold and aspect ratio. However, such assumptions are valid only for nanorods with high aspect ratio and often are misinterpretingthe...

Università della Svizzera italiana

Holistic recommender systems for software engineering

Ponzanelli, Luca ; Lanza, Michele (Dir.) ; Mocci, Andrea (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2017 ; 2017INFO005.

The knowledge possessed by developers is often not sufficient to overcome a programming problem. Short of talking to teammates, when available, developers often gather additional knowledge from development artifacts (e.g., project documentation), as well as online resources. The web has become an essential component in the modern developer’s daily life, providing a plethora of information ...

Université de Fribourg

Plate tectonics drive tropical reef biodiversity dynamics

Leprieur, Fabien ; Descombes, Patrice ; Gaboriau, Théo ; Cowman, Peter F. ; Parravicini, Valeriano ; Kulbicki, Michel ; Melián, Carlos J. ; Santana, Charles N. de ; Heine, Christian ; Mouillot, David ; Bellwood, David R. ; Pellissier, Loïc

In: Nature Communications, 2016, vol. 7, p. 11461

The Cretaceous breakup of Gondwana strongly modified the global distribution of shallow tropical seas reshaping the geographic configuration of marine basins. However, the links between tropical reef availability, plate tectonic processes and marine biodiversity distribution patterns are still unknown. Here, we show that a spatial diversification model constrained by absolute plate motions...

Université de Fribourg

Forecasted coral reef decline in marine biodiversity hotspots under climate change

Descombes, Patrice ; Wisz, Mary S. ; Leprieur, Fabien ; Parravicini, Valerianio ; Heine, Christian ; Olsen, Steffen M. ; Swingedouw, Didier ; Kulbicki, Michel ; Mouillot, David ; Pellissier, Loïc

In: Global Change Biology, 2015, vol. 21, no. 7, p. 2479–2487

Coral bleaching events threaten coral reef habitats globally and cause severe declines of local biodiversity and productivity. Related to high sea surface temperatures (SST), bleaching events are expected to increase as a consequence of future global warming. However, response to climate change is still uncertain as future low-latitude climatic conditions have no present-day analogue. Sea surface...