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Université de Fribourg

RaxmlGUI 2.0: A graphical interface and toolkit for phylogenetic analyses using RAxML

Edler, Daniel ; Klein, Johannes ; Antonelli, Alexandre ; Silvestro, Daniele

In: Methods in Ecology and Evolution, 2020, vol. -, no. -, p. -

raxmlGUI is a graphical user interface to RAxML, one of the most popular and widely used softwares for phylogenetic inference using maximum likelihood.Here we present raxmlGUI 2.0, a complete rewrite of the GUI which seamlessly integrates RAxML binaries for all major operating systems with an intuitive graphical front‐end to setup and run phylogenetic analyses.Our program offers automated...

Université de Fribourg

Sampbias, a method for quantifying geographic sampling biases in species distribution data

Zizka, Alexander ; Antonelli, Alexandre ; Silvestro, Daniele

In: Ecography, 2020/n/a/n/a/-

Geo-referenced species occurrences from public databases have become essential to biodiversity research and conservation. However, geographical biases are widely recognized as a factor limiting the usefulness of such data for understanding species diversity and distribution. In particular, differences in sampling intensity across a landscape due to differences in human accessibility are...

Université de Fribourg

The past and future human impact on mammalian diversity

Andermann, Tobias ; Faurby, Søren ; Turvey, Samuel T. ; Antonelli, Alexandre ; Silvestro, Daniele

In: Science Advances, 2020, vol. 6, no. 36, p. eabb2313

To understand the current biodiversity crisis, it is crucial to determine how humans have affected biodiversity in the past. However, the extent of human involvement in species extinctions from the Late Pleistocene onward remains contentious. Here, we apply Bayesian models to the fossil record to estimate how mammalian extinction rates have changed over the past 126,000 years, inferring...

Université de Fribourg

Genomic footprints of repeated evolution of CAM photosynthesis in a Neotropical species radiation

De La Harpe, Marylaure ; Paris, Margot ; Hess, Jaqueline ; Barfuss, Michael Harald Johannes ; Serrano‐Serrano, Martha Liliana ; Ghatak, Arindam ; Chaturvedi, Palak ; Weckwerth, Wolfram ; Till, Walter ; Salamin, Nicolas ; Wai, Ching Man ; Ming, Ray ; Lexer, Christian

In: Plant, Cell & Environment, 2020/n/a//-

The adaptive radiation of Bromeliaceae (pineapple family) is one of the most diverse among Neotropical flowering plants. Diversification in this group was facilitated by shifts in several adaptive traits or “key innovations” including the transition from C3 to CAM photosynthesis associated with xeric (heat/drought) adaptation. We used phylogenomic approaches, complemented by differential...

Université de Fribourg

Systematics of Vriesea (Bromeliaceae): phylogenetic relationships based on nuclear gene and partial plastome sequences

Machado, Talita Mota ; Loiseau, Oriane ; Paris, Margot ; Weigand, Anna ; Versieux, Leonardo M ; Stehmann, João Renato ; Lexer, Christian ; Salamin, Nicolas

In: Botanical Journal of the Linnean Society, 2020, vol. 192, no. 4, p. 656–674

Vriesea is the second largest genus in Tillandsioideae, the most diverse subfamily of Bromeliaceae. Although recent studies focusing on Tillandsioideae have improved the systematics of Vriesea, no consensus has been reached regarding the circumscription of the genus. Here, we present a phylogenetic analysis of core Tillandsioideae using the nuclear gene phyC and plastid data obtained from...

Université de Fribourg

Deciphering the biology of Cryptophyllachora eurasiatica gen. et sp. nov., an often cryptic pathogen of an allergenic weed, Ambrosia artemisiifolia

Kiss, Levente ; Kovács, Gábor M. ; Bóka, Károly ; Bohár, Gyula ; Bohárné, Krisztina Varga ; Németh, Márk Z. ; Takamatsu, Susumu ; Shin, Hyeon-Dong ; Hayova, Vera ; Nischwitz, Claudia ; Seier, Marion K. ; Evans, Harry C. ; Cannon, Paul F. ; Ash, Gavin James ; Shivas, Roger G. ; Müller-Schärer, Heinz

In: Scientific Reports, 2018, vol. 8, no. 1, p. 10806

A little known, unculturable ascomycete, referred to as Phyllachora ambrosiae, can destroy the inflorescences of Ambrosia artemisiifolia, an invasive agricultural weed and producer of highly allergenic pollen. The fungus often remains undetectable in ragweed populations. This work was conducted to understand its origin and pathogenesis, a prerequisite to consider its potential as a biocontrol...