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[BSW] Orchid Decline Paper

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  • Kathy Bilton
    ... Date: Sat, 3 May 2014 13:23:08 +0000 From: Rod Simmons To: armn@googlegroups.com Subject: Orchid
    Message 1 of 1 , May 4, 2014
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      ---------- Forwarded message ----------
      Date: Sat, 3 May 2014 13:23:08 +0000
      From: Rod Simmons <Rod.Simmons@...>
      To: "armn@..." <armn@...>
      Subject: Orchid Decline Paper

      An excellent paper from our friends Wes Knapp and Dick Wiegand at the
      Maryland Wildlife and Heritage Service:

      From: "Knapp, Wesley M." <WKnapp@...>
      Date: May 2, 2014 7:27:54 AM EDT
      To: Undisclosed recipients:;
      Subject: Orchid Decline Paper

      Friends and Colleagues:

      For the past few years Dick Wiegand and I’ve been writing up a
      paper detailing the decline of the Orchids of the Catoctin
      Mountains of Frederick County Maryland.  I am honored that this
      paper has been published through the international conservation
      journal Biodiversity and Conservation. The results of this
      41-year study show a precipitous decline in 19 of the 21 species
      of Orchids known from the Catoctin Mountains .  Annual census
      data at 167 sites from throughout the Catoctin Mountains on
      protected and unprotected lands (private and public) show a loss
      of three species from the study area, a decline of >90 %
      (ranging from 99 to 91 %) in seven species, and a decline of <90
      % (ranging from 51 to 87 %) for nine species. We tested the
      hypothesis that this decline is due to intensified herbivory by
      white-tailed deer. The overall orchid census data is
      significantly inversely-correlated (R = -0.93) to the
      white-tailed deer harvest data of Frederick County (a surrogate
      for population size), which includes the entirety of the study

      A link to this paper is below. This is an Open Access paper so
      anyone can download, read, and reproduce it. This paper
      documents a trend many have witnessed in adjacent State and
      regions. Please pass this paper on to our various conservation


      All the best,


      Wesley Knapp
      Maryland Department of Natural Resources
      Wildlife and Heritage Service
      PO Box 68 (909 Wye Mills Rd)
      Wye Mills, MD 21679
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