Visualizations for taxonomic and phylogenetic trees

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Abstract
Motivation: Despite substantial efforts to develop and populate the back-ends of biological databases, front-ends to these systems often rely on taxonomic expertise. This research applies techniques from human–computer interaction research to the biodiversity domain. Results: We developed an interactive node-link tool, TaxonTree, illustrating the value of a carefully designed interaction model, animation, and integrated searching and browsing towards retrieval of biological names and other information. Users tested the tool using a new, large integrated dataset of animal names with phylogenetic-based and classification-based tree structures. These techniques also translated well for a tool, DoubleTree, to allow comparison of trees using coupled interaction. Our approaches will be useful not only for biological data but as general portal interfaces. Availability: Working versions of TaxonTree and DoubleTree and video demonstrations of DoubleTree are available at http://www.cs.umd.edu/hcil/biodiversity Supplementary information: All datasets and folk tree illustration are available at http://www.cs.umd.edu/hcil/biodiversity

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