[obol] Brown-bag today at Metro, room 370, 12:15-noon - birds and trails

[Lori Hennings]

Elaine Stewart, Metro Parks and Greenspaces - Natural Areas
 
I didn't think to send this out to OBOL previously - my apologies.
 
Lori
 
 
 
Elaine Stewart, Metro Parks & Greenspaces
 
Understanding effects of public trails on passerine habitat use

Natural area managers must balance public access and habitat protection.  The very attributes that make a site attractive to the public may be deleteriously affected by excessive public use.  This balancing act is often performed in the absence of data that would help managers identify whether, and to what extent, habitat use by wildlife is affected by public use.  We sought to determine whether habitat use by songbirds inhabiting riparian forests differed in areas with and without public trails.  We conducted avian surveys with a standard point count protocol in 2006 and 2007.  Work was conducted at Smith and Bybee Wetlands Natural Area in north Portland.  We surveyed from three stations near the Interlakes Trail on the north side of the natural area and three stations on the south side of Smith Lake, which is closed to the public.  All stations were located in cottonwood gallery forest near a slough.  In our presentation, we will compare and contrast seasonal bird assemblages between the area used by the public and the area without public access.

 
 
 
Lori Hennings
Senior Natural Resource Scientist
Nature in Neighborhoods
Metro
503-797-1940
lori.hennings at oregonmetro.gov 
 
www.oregonmetro.gov ( http://www.oregonmetro.gov/ )
Metro | People places. Open spaces.
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