4 Works

Data from: Extremely long-distance seed dispersal by an overfished Amazonian frugivore

Jill T. Anderson, Tim Nuttle, Joe S. Saldaña Rojas, Thomas H. Pendergast, Alexander S. Flecker, A. S. Flecker, J. T. Anderson, T. H. Pendergast & T. Nuttle
Throughout Amazonia, overfishing has decimated populations of fruit-eating fishes, especially the largebodied characid, Colossoma macropomum. During lengthy annual floods, frugivorous fishes enter vast Amazonian floodplains, consume massive quantities of fallen fruits and egest viable seeds. Many tree and liana species are clearly specialized for icthyochory, and seed dispersal by fish may be crucial for the maintenance of Amazonian wetland forests. Unlike frugivorous mammals and birds, little is known about seed dispersal effectiveness of fishes. Extensive...

Data from: Classification tree methods provide a multifactorial approach to predicting insular body size evolution in rodents

Paul A. P. Durst, V. Louise Roth & V. Louise Roth
Many hypotheses have been proposed to explain size changes in insular mammals, but no single variable suffices to explain the diversity of responses, particularly within Rodentia. Here in a dataset on insular rodents we observe strong consistency in the direction of size change within islands and within species, but (outside of Heteromyidae) little consistency at broader taxonomic scales. Using traits of islands and of species in a classification-tree analysis we find the most important factor...

Data from: Testing a developmental model in the fossil record: molar proportions in South American ungulates

Laura A. B. Wilson, Richard H. Madden, Richard F. Kay & Marcelo R. Sánchez-Villagra
A developmental model, based upon murine rodents, has been proposed by Kavanagh et al. (2007) to explain lower molar proportions in mammals. We produce a clade-wide macroevolutionary test of the model using the dental evolutionary trends in a unique radiation of extinct mammals endemic to South America (“Meridiungulata”) that comprise a diverse array of molar morphologies. All of the South American ungulate groups examined follow the inhibitory cascade model with the exception of two groups:...

Data from: Effects of inversions on within- and between-species recombination and divergence

Laurie S. Stevison, Mohamed A. F. Noor & Kenneth B. Hoehn
Chromosomal inversions disrupt recombination in heterozygotes by both reducing crossing over within inverted regions and increasing it elsewhere in the genome. The reduction of recombination in inverted regions facilitates the maintenance of hybridizing species, as outlined by various models of chromosomal speciation. We present a comprehensive comparison of the effects of inversions on recombination rates and on nucleotide divergence. Within an inversion differentiating Drosophila pseudoobscura and D. persimilis, we detected one double-recombinant among 9739 progeny...

Registration Year

  • 2011
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Resource Types

  • Dataset
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Affiliations

  • Duke University
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  • University of Pittsburgh
    1
  • Indiana University of Pennsylvania
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  • Cornell University
    1