[MAIPC] [MD-OUTINGS-COMM] FW: deer exclosures and JSG

Sat Jun 23 18:30:51 PDT 2018

Any response for Larry in addition to his two explanations? Thanks

Marc

From: Larry Broadwell [mailto:bakpacker1 at verizon.net] 
Sent: Saturday, June 23, 2018 8:56 PM
To: Maryland Chapter Outings Committee <MD-OUTINGS-COMM at LISTS.SIERRACLUB.ORG>; Marc Imlay <ialm at erols.com>
Subject: Re: [MD-OUTINGS-COMM] FW: [MAIPC] deer exclosures and JSG

Marc,

I'm not getting some of this.

Are deer spreading JSG? Are they eating so much native grass that JSG is filling in areas formerly filled with native grass?

Larry Broadwell 

On Saturday, June 23, 2018 4:43 PM, Marc Imlay <ialm at erols.com <mailto:ialm at erols.com> > wrote:

Many studies have shown that when deer are present at 20/square mile or less, there is a dramatic reduction in the cases of Lyme disease. Here are some parks with this lower deer density of 20/square mile as a result of managed hunts. Can someone find out how much the reduction of deer density has resulted in reduction of Japanese Stilt grass? One urgent research question is to determine if reduction of deer to the natural level of 20/square mile works as well as deer exclosures in reducing JSG.

Howard County

 <https://www.howardcountymd.gov/MPEA> Middle Patuxent Environmental area 

 <https://www.howardcountymd.gov/MeadowbrookPark> Meadowbrook Park

 <https://www.howardcountymd.gov/SchooleyMillPark> Schooley Mill Park

 <https://www.howardcountymd.gov/WesternRegionalPark> Western Regional Park
 <https://www.nps.gov/rocr/index.htm> Rock Creek National Park in Washington D.C. adjacent to Montgomery County
 <https://www.nps.gov/cato/index.htm> Catoctin Mountain National Park in Frederick County

Hi Marc - as you probably know, the Woodend Sanctuary of ANS now has a deer fence. I am on a team monitoring the unrestored meadow, which used to be infested with stlltgass. Native forbs and grasses have taken over with very little JSG to be seen. The changes are being documented - in my meadow, the restored meadow, woodlands and stream. Heartening!

Marney

On Jun 23, 2018, at 10:35 AM, Marc Imlay <ialm at erols.com <mailto:ialm at erols.com> > wrote:

In the 200 acre Swann Park in Charles County, there are 3 places where I have seen a pathogen infestation of Japanese Stilt grass. Only one of these sites has been re infested in subsequent years. Today I transferred some of the site with an August pathogen infestation of Japanese Stilt grass that  has been re infested in subsequent years to a bad patch of JSG elsewhere in the park with similar habitat. (from the Mattawoman watershed part of Swann Park to the Pomonkey watershed component of Ruth B. Swann Park). I marked the site and will return to check it out each month. 

Let us discuss other ideas to address control of our most difficult invasive plant to control.  One urgent research question is to determine if reduction of deer to the natural level of 20/square mile works as well as deer exclosures in reducing JSG. How can we facilitate research into native host specific biological controls of JSG.

 Marc Imlay, PhD, Chair, MAIPC Biological control working Group,  MD Chapter Sierra Club Natural Places Chair. 

Conservation biologist, Park Ranger Office, Non-native Invasive Plant Control coordinator. 
(301) 442-5657 cell   <mailto:ialm at erols.com> ialm at erols.com
Natural and Historical Resources Division
The  Maryland-National   Capital   Park  and Planning Commission
 <http://www.pgparks.com/> www.pgparks.com  

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