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I wanted to share this article because I noticed several long-term PCA collaborators were mentioned as authors!</div>
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<span style="mso-ascii-font-family:Calibri;mso-fareast-font-family:"Times New Roman";mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black">Wesley Knapp, Anne Frances, Reed Noss, Alan Weakley, George D. Gann, Bruce G. Baldwin, James Miller,
Patrick McIntyre, Brent D. Mishler, Gerry Moore, Richard G. Olmstead, Anna Strong, Kathryn Kennedy, Bonnie Heidel, Daniel Gluesenkamp<o:p> </o:p></span></p>
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<span style="mso-ascii-font-family:Calibri;mso-fareast-font-family:"Times New Roman";mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black">Conservation Biology, August 2020<o:p> </o:p></span></p>
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<span style="mso-ascii-font-family:Calibri;mso-fareast-font-family:"Times New Roman";mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black"><o:p> </o:p></span></p>
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<span style="mso-ascii-font-family:Calibri;mso-fareast-font-family:"Times New Roman";mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black">Article Impact Statement: The number of presumed extinct plants from the continental United States and
Canada is much greater than previously recognized.</span><o:p> </o:p></p>
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<span style="mso-ascii-font-family:Calibri;mso-fareast-font-family:"Times New Roman";mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black"><o:p> </o:p></span></p>
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<span style="mso-ascii-font-family:Calibri;mso-fareast-font-family:"Times New Roman";mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black">Abstract: Extinction rates are expected to increase during the Anthropocene. Current extinction rates
of plants and many animals remain unknown. We quantified extinctions among the vascular flora of the continental United States and Canada since European settlement. We compiled data on apparently extinct species by querying plant conservation databases, searching
the literature, and vetting the resulting list with botanical experts. Because taxonomic opinion varies widely, we developed an index of taxonomic uncertainty (ITU). The ITU ranges from A to F, with A indicating unanimous taxonomic recognition and F indicating
taxonomic recognition by only a single author. The ITU allowed us to rigorously evaluate extinction rates. Our data suggest that 51 species and 14 infraspecific taxa, representing 33 families and 49 genera of vascular plants, have become extinct in our study
area since European settlement. Seven of these taxa exist in cultivation but are extinct in the wild. Most extinctions occurred in the west, but this outcome may reflect the timing of botanical exploration relative to settlement. Sixty$B!>(Bfour percent of extinct
plants were single$B!>(Bsite endemics, and many occurred outside recognized biodiversity hotspots. Given the paucity of plant surveys in many areas, particularly prior to European settlement, the actual extinction rate of vascular plants is undoubtedly much higher
than indicated here.</span><o:p> </o:p></p>
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<span style="mso-ascii-font-family:Calibri;mso-fareast-font-family:"Times New Roman";mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black"><o:p> </o:p></span></p>
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<span style="mso-ascii-font-family:Calibri;mso-fareast-font-family:"Times New Roman";mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black">Link to article: https://conbio.onlinelibrary.wiley.com/doi/full/10.1111/cobi.13621<o:p> </o:p></span></p>
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