5 Works

Data from: Macro- and microgeographic genetic structure in an ant species with alternative reproductive tactics in sexuals

Susanne Foitzik, Markus H. Rüger, Ilka M. Kureck & Dirk Metzler
The genetic structure of social insect populations is influenced by their social organisation and dispersal modes. The ant Hypoponera opacior shows diverse reproductive behaviours with regular cycles of outbreeding via winged sexuals and inbreeding via within-nest mating wingless sexuals that reproduce by budding. This unusual life cycle should be reflected in the genetic population structure and we studied this on different scales using microsatellites. On a macrogeographic scale, populations were considerably structured and migration rates...

Data from: Local and global abundance associated with extinction risk in late Paleozoic and early Mesozoic gastropods

Jonathan L. Payne, Sarah Truebe, Alexander Nützel & Ellen T. Chang
Ecological theory predicts an inverse association between population size and extinction risk, but most previous paleontological studies have not confirmed this relationship. The reasons for this discrepancy between theory and observation remain poorly understood. In this study, we compiled a global database of gastropod occurrences and collection-level abundances spanning the Early Permian through Early Jurassic (Pliensbachian). Globally, the database contains 5469 occurrences of 496 genera and 2156 species from 839 localities. Within the database, 30...

Data from: Genetic diversity, population structure and sex-biased dispersal in three co-evolving species

Susanne Foitzik, Sabine Bauer, Stefan Laurent & Pleuni S Pennings
Genetic diversity and spatial structure of populations are important for antagonistic coevolution. We investigated genetic variation and population structure of three closely related European ant species: the social parasite Harpagoxenus sublaevis and its two host species Leptothorax acervorum and Leptothorax muscorum. We sampled populations in 12 countries and analyzed eight microsatellite loci and an mtDNA sequence. We found high levels of genetic variation in all three species, only slightly less variation in the host L....

Data from: Delimitation of the Thoracosphaeraceae (Dinophyceae), including the calcareous dinoflagellates, based on large amounts of ribosomal RNA sequence data

Marc Gottschling, Sylvia Soehner, Carmen Zinssmeister, Uwe John, Jörg Plötner, Michael Schweikert, Katerina Aligizaki & Malte Elbrächter
The phylogenetic relationships of the Dinophyceae (Alveolata) are not sufficiently resolved at present. The Thoracosphaeraceae (Peridiniales) are the only group of the Alveolata that include members with calcareous coccoid stages; this trait is considered apomorphic. Although the coccoid stage apparently is not calcareous, Bysmatrum has been assigned to the Thoracosphaeraceae based on thecal morphology. We tested the monophyly of the Thoracosphaeraceae using large sets of ribosomal RNA sequence data of the Alveolata including the Dinophyceae....

Data from: Gizzard vs. teeth, it’s a tie: food-processing efficiency in herbivorous birds and mammals and implications for dinosaur feeding strategies

Julia Fritz, Jürgen Hummel, Ellen Kienzle, Oliver Wings, W. Jürgen Streich & Marcus Clauss
Particle size reduction is a primary means of improving efficiency in herbivores. The mode of food particle size reduction is one of the main differences between herbivorous birds (gizzard) and mammals (teeth). For a quantitative comparison of the efficiency of food comminution, we investigated mean fecal particle sizes (MPS) in 14 herbivorous bird species and compared these with a data set of 111 non-ruminant herbivorous mammal species. In general MPS increased with body mass, but...

Registration Year

  • 2011
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Resource Types

  • Dataset
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Affiliations

  • Ludwig Maximilian University of Munich
    5
  • Stanford University
    1
  • Humboldt University of Berlin
    1
  • Johannes Gutenberg University of Mainz
    1
  • University of Zurich
    1
  • Aristotle University of Thessaloniki
    1
  • Alfred Wegener Institute for Polar and Marine Research
    1
  • University of Bonn
    1