![[PHOTOGRAPH]](/GRAPHICS/npp/DCK1-2.gif)
Photograph: Washing root samples at the Dickinson site (click on the photo to view a series of images from this site).
Data Citation
Cite this data set as follows:
Whitman, W., and W. K. Lauenroth. 1998. NPP Grassland: Dickinson, U.S.A., 1970. Data set. Available on-line [http://www.daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.
Description
Productivity of a northern mixed prairie grassland was monitored at the Dickinson study site during 1970. Dynamics of above-ground plant biomass were monitored at roughly 2-week intervals during the growing season. Data on above-ground live biomass, standing dead matter and litter are available, for two replications of a grazed and an "ungrazed" (relatively undisturbed) treatment. Total below-ground biomass was also sampled. Above-ground net primary production (ANPP) was estimated conservatively by summing peak biomass of individual species, and below-ground net primary production (BNPP) was estimated as the sum of positive increments in total root plus crown biomass.
Data were collected as part of a coordinated study over 1-3 years at ten grassland sites of the central and western United States, under the U.S. Grassland Biome Project of the International Biological Program (IBP).
The Dickinson study site (46.90 N 102.82 W) is situated in the northern Great Plains, near the city of Dickinson, about 160 km west of Bismarck, North Dakota. The Dickinson sub-station of the U.S. Northern Great Plains Field Station was established in 1907.
Contact Information
Contact: Dr. W. K. Lauenroth
Natural Resource Ecology Laboratory
Colorado State University
Fort Collins, Colorado 80523
U.S.A.
Telephone: +1 (970) 491-7581
Fax: +1 (970) 491-1965
E-mail: billl@cnr.colostate.edu
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references and summaries.