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Go to: 88. Effect of Overstory Density and Understory Control on the Establishment and Growth of Oak (Study 108)

Go to:90. Berea Water Laboratory Studies

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Catalog of Long Term Research Conducted by the Northeastern Research Station

Catalog #89

Urban-Rural Gradient Ecology Program (URGE)
To study the long-term influences of urbanization on forest ecosystem structure and function.
expected to continue
Bronx County, NY.; Westchester County, NY.; Litchfield County, CT.
140 km transect from Bronx, NY. to Litchfield County CT. Additional plots setup in New York City by the Institute of Ecosystem Studies which, with permission, are accessible by USDA Forest Service.
presently in development
Permanent plots 20m X 20m in size are marked with metal markers positioned on plot corners which can be found by a metal detector.
Program Established 1992. 
Vegetation characteristics (spp., stem diameter, height, etc.,): collected every 5 years.

Nutrient cycling process (N mineralization, trace gases), leaf litter inputs, soil properties, soil fauna (densities by functional group): collected during growing seasons of 1989, 1990, 1991, 1992, etc., assuming funds are available.

Consistent field personnel training
SAS - summarized 
Quattro Pro spreadsheet - raw 
5 HD 3.5" diskettes to date.
Mechanistic Studies of Physiological Process of Trees as Affected by Multiple Stresses 
Studies of Ecosystem Processes 
Landscape Scale Studies 
Social Interactions and Economics
none to date.
Jack Stevens, USDA Forest Service, c/o State Univ. of New York, College of Environmental Science and Forestry, 5 Moon Library, Syracuse NY 13210. (315) 448-3211
Richard Pouyat, NY Institute of Ecosystem Studies, Cary Arboretum, Box AB, Millbrook, NY 12545-0129. (914) 677-5343



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