1,309 research outputs found
Quantifying age-dependent extinction from species phylogenies
No full textSeveral ecological factors that could play into species extinction are expected to correlate with species age, i.e., time elapsed since the species arose by speciation. To date, however, statistical tools to incorporate species age into likelihood-based phylogenetic inference have been lacking. We present here a computational framework to quantify age-dependent extinction through maximum likelihood parameter estimation based on phylogenetic trees, assuming species lifetimes are gamma distributed. Testing on simulated trees shows that neglecting age dependence can lead to biased estimates of key macroevolutionary parameters. We then apply this method to two real data sets, namely a complete phylogeny of birds (class Aves) and a clade of self-compatible and -incompatible nightshades (Solanaceae), gaining initial insights into the extent to which age-dependent extinction may help explain macroevolutionary patterns. Our methods have been added to the R package TreePar.Alexander, Helen K.; Lambert, Amaury; Stadler, Tanja (2015), Data from: Quantifying age-dependent extinction from species phylogenies, Dryad, Dataset, https://doi.org/10.5061/dryad.7894
Epiphytic leafy liverworts diversified in angiosperm-dominated forests.
Get PDFRecent studies have provided evidence for pulses in the diversification of angiosperms, ferns, gymnosperms, and mosses as well as various groups of animals during the Cretaceous revolution of terrestrial ecosystems. However, evidence for such pulses has not been reported so far for liverworts. Here we provide new insight into liverwort evolution by integrating a comprehensive molecular dataset with a set of 20 fossil age constraints. We found evidence for a relative constant diversification rate of generalistic liverworts (Jungermanniales) since the Palaeozoic, whereas epiphytic liverworts (Porellales) show a sudden increase of lineage accumulation in the Cretaceous. This difference is likely caused by the pronounced response of Porellales to the ecological opportunities provided by humid, megathermal forests, which were increasingly available as a result of the rise of the angiosperms
Internationalisation Strategies for B2B Companies
No full textAuthor Tanja Maria Scherbaum, B.A.Masterarbeit Universität Linz 201
Internationalisation Strategies for B2B Companies
No full textAuthor Tanja Maria Scherbaum, B.A.Masterarbeit Universität Linz 201
Der Einfluss von Social Media Marketing von Luxus-Modemarken auf das Markenbewusstsein und die Kaufabsicht der Kunden : am Beispiel von Instagram
No full textAuthor Heinzl Tanja, BScAbweichender Titel laut Übersetzung der Verfasserin/des VerfassersMasterarbeit Universität Linz 2022Arbeit auf den öffentlichen PCs in den Bibliotheken der JKU+Medizin abrufba
Engagement dynamics In online workshops for future-making : a case study of an open foresight project
No full textAuthor Tanja Berndl BScMasterarbeit Johannes Kepler Universität Linz 2024Arbeit nach Ablauf der Sperre auf den öffentlichen PCs in den Bibliotheken der JKU+Medizin abrufba
Engagement dynamics In online workshops for future-making : a case study of an open foresight project
No full textAuthor Tanja Berndl BScMasterarbeit Johannes Kepler Universität Linz 2024Arbeit nach Ablauf der Sperre auf den öffentlichen PCs in den Bibliotheken der JKU+Medizin abrufba
Dung removal and secondary seed dispersal data
No full text<p>The datasets are described in the following data paper:<br>
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Tanja Milotić, Christophe Baltzinger, Carsten Eichberg, Amy Eycott, Marco Heurich, Jörg Müller, Jorge Ari Noriega, Rosa Menendez, Jutta Stadler, Réka Ádám, Tessa Bahiga Bargmann, Isabelle Bilger, Jörn Buse, Joaquin Calatayud, Constantin Ciubuc, Gergely Boros, Marie Hauso, Pierre Jay-Robert, Märt Kruus, Enno Merivee, Geoffrey Miessen, Anne Must, Elham Omidzadeh Ardali, Elena Preda, Iraj Rahimi, Dirk Rohwedder, Eleanor M. Slade, László Somay, Pejman Tahmasebi, Stefano Ziani, Maurice Hoffmann (2018) Dung beetle assemblages and associated dung removal and secondary seed dispersal: data from a large-scaled multi-site experiment in the Western Palaearctic. Frontiers of Biogeography, Volume 10, Issue 1-2.</p>
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