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Assessing the rate and reversibility of large herbivore effects on community composition in a semi-arid grassland ecosystem with GZTX data on the Central Plains Experimental Range, Nunn, Colorado, USA 1992-2017

Metadata Updated: February 4, 2022

This data package was produced initially by researchers working on the Shortgrass Steppe Long Term Ecological Research (SGS-LTER) Project, administered at Colorado State University. Then, was continued by the Rangeland Resources and Systems Research Unit of the USDA Agricultural Research Service. Data collection was conducted on the Central Plains Experimental Range in Nunn, Colorado. When the CPER was established in 1939, researchers constructed a .5-1 ha grazing exclosure in each of the pastures. These areas have remained protected from grazing for the past 70 years. The remaining areas have been grazed for the past 20+ years. This collection of pastures and exclosures provided an extraordinary opportunity to reinitiate grazing and protection, and evaluate the balance between degradation and aggradation. We proposed to rearrange fences and expose areas to grazing that have been protected for 50 years, and protect areas from grazing that had been grazed for 50 years. The combinations of grazing conditions were: 1. Long-term protection 2. Long-term grazing (moderate) 3. 50 years of protection followed by grazing 4. 50 years of grazing followed by protection Net primary production, nitrogen dynamics, cattle utilization, and community dynamics of vegetation were measured. Additional information and referenced materials about many of the long-term studies initiated on the CPER can be found:

Access & Use Information

Public: This dataset is intended for public access and use. License: Creative Commons CCZero

Downloads & Resources


Metadata Created Date November 10, 2020
Metadata Updated Date February 4, 2022
Data Update Frequency R/P1M

Metadata Source

Harvested from USDA JSON

Additional Metadata

Resource Type Dataset
Metadata Created Date November 10, 2020
Metadata Updated Date February 4, 2022
Publisher Agricultural Research Service
Identifier 72528a8f-888a-444e-b765-f61a59e9229c
Data Last Modified 2020-08-18
Public Access Level public
Data Update Frequency R/P1M
Bureau Code 005:18
Metadata Context
Schema Version
Catalog Describedby
Data Dictionary
Harvest Object Id c41c41b6-73be-4f42-a4ad-4569febab378
Harvest Source Id d3fafa34-0cb9-48f1-ab1d-5b5fdc783806
Harvest Source Title USDA JSON
Old Spatial {"type":"Polygon","coordinates":-104.785833,40.8575,-104.730556,40.8575,-104.730556,40.800278,-104.785833,40.800278}
Program Code 005:040
Source Datajson Identifier True
Source Hash 611b1115937e48a838bd5aa5f7e381f09b2f2514
Source Schema Version 1.1
Spatial {"type":"Polygon","coordinates":-104.785833,40.8575,-104.730556,40.8575,-104.730556,40.800278,-104.785833,40.800278}

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