Welcome, David Henderson!

We are happy to host David Henderson as part of his rotation at Washington University in St. Louis during the spring semester of 2019! David is interested in understanding biogeographic patterns using herbarium records. Many records are only “vaguely” georeferenced (i.e., to a county or similar political unit). Vague records can represent 40% or more of all georeferenced records, yet are routinely discarded before analysis.  David is examining the impact of this practice on estimates of range size and habitat breadth.

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