4 Works

Data from: Effects of gene flow on phenotype matching between two varieties of Joshua tree (Yucca brevifolia; Agavaceae) and their pollinators

Jeremy B. Yoder, Christopher I. Smith, Daniel J. Rowley, Ramona Flatz, William Godsoe, Christopher Drummond & Olle Pellmyr
In animal-pollinated plants, local adaptation to pollinator behaviour or morphology can restrict gene flow among plant populations; but gene flow may also prevent divergent adaptation. Here, we examine possible effects of gene flow on plant-pollinator trait matching in two varieties of Joshua tree (Agavaceae: Yucca brevifolia). The two varieties differ in strikingly in floral morphology, which matches differences in the morphology of their pollinators. However, this co-divergence is not present at a smaller scale: within...

Data from: \"Disentangling nestedness\" disentangled

Serguei Saavedra & Daniel B. Stouffer
Analytical research indicates that the ‘nestedness’ of mutualistic networks facilitates the coexistence of species by minimizing the costs of competition relative to the benefits of facilitation. In contrast, James et al. recently argued that a more parsimonious explanation exists: the persistence of a community and its constituent species depends more on their having many interactions (high connectance and high degree, respectively) than for these interactions to be organized in any particular manner. Here we demonstrate...

Data from: Anomalous unrooted gene trees

James H. Degnan
The coalescent and multispecies coalescent model rooted genealogies backward through time. Often, the direction of time is unknown in trees estimated from molecular sequences due to reversible mutation models, absence of an appropriate outgroup, and the absence of the molecular clock. In this paper, probabilities of unrooted gene-tree topologies under the multispecies coalescent are considered. The main result is that for any species-tree topology with 7 or more taxa, there exist branch lengths such that...

Data from: Genomic evidence for the parallel evolution of coastal forms in the Senecio lautus complex

Federico Roda, Luke Ambrose, Gregory M. Walter, Huanle L. Liu, Andrea Schaul, Andrew Lowe, Pieter B. Pelser, Peter Prentis, Loren H. Rieseberg & Daniel Ortiz-Barrientos
Instances of parallel ecotypic divergence where adaptation to similar conditions repeatedly cause similar phenotypic changes in closely related organisms are useful for studying the role of ecological selection in speciation. Here we used a combination of traditional and next generation genotyping techniques to test for the parallel divergence of plants from the Senecio lautus complex, a phenotypically variable groundsel that has adapted to disparate environments in the South Pacific. Phylogenetic analysis of a broad selection...

Registration Year

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  • University of Canterbury
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  • University of Adelaide
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  • University of Queensland
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  • University of Minnesota
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  • Spanish National Research Council
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  • Indiana University Bloomington
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  • University of Idaho
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  • Queensland University of Technology
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  • University of British Columbia
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  • Willamette University
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