[MAIPC] FW: Stilt grass question

[tomnjan2]

There were areas that little light was clearly at play, but a blanketed grass area with a lone Holly still didn't have grass below. Tree heights were mixed, and many were in significant sunlight as well. This variety of holly is more open than common garden type.
Jan

Sent from my iPad

> On Sep 28, 2015, at 8:03 AM, "Hughes, Jake" <jake_hughes at nps.gov> wrote:
> 
> My guess is that light limitation is at work.  Cole and Weltzin found the same pattern with paw paw (Asimina triloba):
> 
> Cole, P.G. and J.F. Weltzin. 2005. Light limitation creates patchy distribution of an invasive grass in eastern deciduous forests. Biological Invasions 7(3): 477-488.
> 
> 
> 
> 
> 
> 
>> On Mon, Sep 28, 2015 at 6:27 AM, Marc Imlay <ialm at erols.com> wrote:
>> Any response for Tom and Jan?
>> 
>> Marc Imlay, PhD, Chair, Biological control working Group 
>> 
>> Conservation biologist, Park Ranger Office, Non-native Invasive Plant Control coordinator.
>> (301) 442-5657 cell  ialm at erols.com
>> Natural and Historical Resources Division
>> The  Maryland-National   Capital   Park  and Planning Commission
>> www.pgparks.com  
>> 
>>  
>> 
>>  
>> 
>>  
>> 
>> -----Original Message-----
>> From: tomnjan2 [mailto:tomnjan2 at comcast.net] 
>> Sent: Monday, September 28, 2015 12:16 AM
>> To: Marc Imlay <ialm at erols.com>
>> Subject: Stilt grass question
>> 
>>  
>> 
>> Hi Marc,
>> 
>> Tom (Crone) and I were walking around the back end of Greenbelt Park today. He was checking on some multiflora rose he'd cut earlier as well stilt grass he cut. But I noticed something I hadn't before. There were large swathes of stilt grass that had bare patches within those areas. The common denominator was Holly tree leaf shed. We started searching elsewhere and found the same correlation. The stilt grass totally avoided wherever the dropped holly leaves landed. Have you seen this before, or know if there's a specific chemical in the leaf that inhibits or kills the grass? Or some other symbiotic relationship creating the inhibition? I'm really curious to know. As we were driving out of the park, I started looking at the mountain laurel and what I saw didn't seem to be surrounded by stilt grass either.
>> 
>>  
>> 
>> thanks
>> 
>> Jan Steiner
>> 
>>  
>> 
>> Sent from my iPad=
>> 
>> 
>> 
>>   			 			
>> This email has been checked for viruses by Avast antivirus software. 
>> www.avast.com
>> 
>> 
>> 
>> _______________________________________________
>> MAIPC mailing list
>> MAIPC at lists.maipc.org
>> http://lists.maipc.org/listinfo.cgi/maipc-maipc.org
> 
> 
> 
> -- 
> Jake Hughes
> Lead Biological Science Technician
> Shenandoah National Park
> 3655 US Hwy 211 E
> Luray, VA 22835
> Jake_Hughes at nps.gov
> Office: 540-999-3500 ext 3492 
> Fax: 540-999-3697
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.maipc.org/pipermail/maipc-maipc.org/attachments/20150928/925d4e57/attachment.htm>