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NPP Grassland: Bridger, USA, 1970-1973, R1


DatasetNPP Grassland: Bridger, USA, 1970-1973, R1
Release date2013-11-12
Time period1894-01-01 to 1994-12-31

Usage Metrics

CountEarliest DateLatest DateData Usage
Citations520022015Publications citing this dataset
Downloads2572007-12-062017-11-161263 total files downloaded


This data set contains three ASCII text files for the Bridger grassland study site in the Rocky Mountains (45.78 N, -110.78 W, Elevation 2,340 m). Two files contain above- and below-ground biomass data, one for each treatment (ungrazed and moderately grazed). The third file contains climate data from the Big Timber weather station (45.80 N, -110.00 W, Elevation 1,249 m) near Bridger. Dynamics of above- and below-ground plant biomass were monitored by harvest technique at roughly 2-week intervals during the growing season for the years 1970, 1972, and 1973. Data on above-ground live biomass, standing dead matter, and litter are provided for each sampling date. Below-ground biomass (roots and crowns) are provided for 0-30 cm and 0-50 cm depths. 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). Above-ground net primary production (ANPP) was estimated, conservatively, by summing peak biomass of individual species. Below-ground net primary production (BNPP) was estimated as the sum of positive increments in total root biomass (including root crowns). Values varied according to treatment. Revision Notes: Only the documentation for this data set has been modified. The data files have been checked for accuracy and are identical to those originally published in 1998.

Dataset documentation


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Crosscite Citation Formatter
Weaver, T.W., and D.D. Collins. 2014. NPP Grassland: Bridger, USA, 1970-1973, R1 . ORNL DAAC, Oak Ridge, Tennessee, USA.

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Data Files

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Data File (Granule)File SizeDates
brd_cli.txt 38.0KB 1894-01-01 to 1994-12-31
brd1_npp.txt 3.1KB 1970-06-30 to 1973-09-18
brd2_npp.txt 2.7KB 1970-06-29 to 1972-11-08

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Dataset has 1 companion files.

  • NPP_BRD.pdf