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Université de Fribourg

Foraminiferal-based biotic indices to assess the ecological quality status of the Gulf of Gabes (Tunisia): Present limitations and future perspectives

Kateb, Akram El ; Stalder, Claudio ; Martínez-Colón, Michael ; Mateu-Vicens, Guillem ; Francescangeli, Fabio ; Coletti, Giovanni ; Stainbank, Stephanie ; Spezzaferri, Silvia

In: Ecological Indicators, 2020, vol. 111, p. 105962

Biotic indices are tools to assess the ecological status of marine systems, and can be based on different metrics (such as ecological groups, specific diversity). The present study applies five biotic indices based on living (stained) benthic foraminiferal assemblages to assess ecological conditions in a wide area of the Mediterranean Sea in the heavily polluted Gulf of Gabes and along the...

Université de Fribourg

Direct observations of a three million cubic meter rock-slope collapse with almost immediate initiation of ensuing debris flows

Walter, Fabian ; Amann, Florian ; Kos, Andrew ; Kenner, Robert ; Phillips, Marcia ; Preux, Antoine de ; Huss, Matthias ; Tognacca, Christian ; Clinton, John ; Diehl, Tobias ; Bonanomi, Yves

In: Geomorphology, 2020, vol. 351, p. 106933

Catastrophic collapse of large rock slopes ranks as one of the most hazardous natural phenomena in mountain landscapes. The cascade of events, from rock- slope failure, to rock avalanche and the near-immediate release of debris flows has not previously been described from direct observations. We report on the 2017, 3.0 × 106 m3 failure on Pizzo Cengalo in Switzerland, which led to human...

Université de Fribourg

Towards a probabilistic understanding about the context-dependency of species interactions

Song, Chuliang ; Ahn, Sarah Von ; Rohr, Rudolf P. ; Saavedra, Serguei

In: Trends in Ecology & Evolution, 2020, vol. 35, no. 5, p. 384–396

Observational and experimental studies have shown that an interaction class between two species (be it mutualistic, competitive, antagonistic, or neutral) may switch to a different class, depending on the biotic and abiotic factors within which species are observed. This complexity arising from the evidence of context-dependencies has underscored a difficulty in establishing a systematic ...

Université de Fribourg

Biological weed control to relieve millions from Ambrosia allergies in Europe

Schaffner, Urs ; Steinbach, Sandro ; Sun, Yan ; Skjøth, Carsten A. ; Weger, Letty A. de ; Lommen, Suzanne T. ; Augustinus, Benno A. ; Bonini, Maira ; Karrer, Gerhard ; Šikoparija, Branko ; Thibaudon, Michel ; Müller-Schärer, Heinz

In: Nature Communications, 2020, vol. 11, no. 1, p. 1745

Invasive alien species (IAS) can substantially affect ecosystem services and human well-being. However, quantitative assessments of their impact on human health are rare and the benefits of implementing IAS management likely to be underestimated. Here we report the effects of the allergenic plant Ambrosia artemisiifolia on public health in Europe and the potential impact of the accidentally...

Université de Fribourg

Functional similarity and dissimilarity facilitate alien plant invasiveness along biotic and abiotic gradients in an arid protected area

El-Barougy, Reham F. ; Elgamal, Ibrahim ; Rohr, Rudolf P. ; Probert, Anna F. ; Khedr, Abdel-Hamid A. ; Bacher, Sven

In: Biological Invasions, 2020, vol. 22, no. 6, p. 1997–2016

Two contradictory hypotheses have been put forth to forecast alien invasiveness: being either functionally similar, or dissimilar, to resident natives along environmental gradients. The ‘try-harder’ hypothesis predicts that alien plants will be functionally dissimilar to natives and should thus exhibit exaggerated trait values when compared to natives in respect to resource extraction or...

Université de Fribourg

Evolutionary genomics can improve prediction of species’ responses to climate change

Waldvogel, Ann-Marie ; Feldmeyer, Barbara ; Rolshausen, Gregor ; Exposito-Alonso, Moises ; Rellstab, Christian ; Kofler, Robert ; Mock, Thomas ; Schmid, Karl ; Schmitt, Imke ; Bataillon, Thomas ; Savolainen, Outi ; Bergland, Alan ; Flatt, Thomas ; Guillaume, Frederic ; Pfenninger, Markus

In: Evolution Letters, 2020, vol. 4, no. 1, p. 4–18

Global climate change (GCC) increasingly threatens biodiversity through the loss of species, and the transformation of entire ecosystems. Many species are challenged by the pace of GCC because they might not be able to respond fast enough to changing biotic and abiotic conditions. Species can respond either by shifting their range, or by persisting in their local habitat. If populations...

Université de Fribourg

Interpretation of clinical data and hypothesis testing with the aid of self-collected data from physiology laboratory courses: a teaching approach for medical students

Grasser, Erik Konrad ; Montani, Jean-Pierre

In: Advances in Physiology Education, 2019, vol. 43, no. 4, p. 557–560

More than 50 million scientific articles were published between 1665 and 2009 (4), with millions more expected every year (6). This incomprehensible number accounts for scientific articles alone and does not encompass various “pseudo-scientific” information and articles that are spread, without any peer review process, by social media and blogs, thereby generating a potential source of...

Université de Fribourg

Airborne medicine: bacterial volatiles and their influence on plant health

Garbeva, Paolina ; Weisskopf, Laure

In: New Phytologist, 2019, p. -

Like most other eukaryotes, plants do not live alone but in close association with a diverse microflora. These plant‐associated microbes contribute to plant health in many different ways, ranging from modulation of hormonal pathways to direct antibiosis of plant pathogens. Over the last 15 yr, the importance of volatile organic compounds as mediators of mutualistic interactions between...

Université de Fribourg

Do invasive alien plants differ from non-invasives in dominance and nitrogen uptake in response to variation of abiotic and biotic environments under global anthropogenic change?

Liu, Yuan-Yuan ; Sun, Yan ; Müller-Schärer, Heinz ; Yan, Rong ; Zhou, Zhi-Xiang ; Wang, Yong-Jian ; Yu, Fei-Hai

In: Science of The Total Environment, 2019, vol. 672, p. 634–642

Plant invasion is the outcome of complicated interactions of both biotic and abiotic environments (i.e. eutrophication and human-induced propagules) under global anthropogenic change. Here, we want to know why some alien clonal plant species become invasive and others do not in the introduced range with variations of both abiotic and biotic environments under global anthropogenic change.We...