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Cattle Grazing Distribution in Shortgrass Steppe: Influences of Topography and Saline Soils
Author
Gersie, S.P.
Augustine, D.J.
Derner, J.D.
Publisher
Elsevier Inc.
Publication Year
2019-07
Body

The distribution of livestock across heterogeneous landscapes is often uneven, which has important implications for vegetation dynamics and how rangeland managers achieve desired outcomes from these landscapes. Here, we use data from widely available digital elevation models to classify a landscape in the shortgrass steppe with subtle topographic variation using two different approaches: topographic wetness index (TWI) and topographic position classes (TPCs) derived from topographic position indices. We used global positioning system collars to track the grazing locations of cattle within replicate pastures and fit generalized linear mixed models to their locations to quantify the influence of topography on grazing distribution. In addition, we examine the influence of the presence of saline vegetation communities on cattle use of lowlands. The resulting models indicate that TPC more effectively predicts grazing distribution than TWI and that the patterns are strongest in the second half of the growing season (August − October). Model performance was improved with the inclusion of saline vegetation communities, although the magnitude of cattle grazing time in these communities was not consistent across multiple pastures. These models, in combination with local knowledge, can be used by managers to predict and manage livestock distribution even in landscapes with relatively subtle topographic variability. © 2019

Language
en
Resource Type
Text
Document Type
Journal Issue/Article
Digital Object Identifier (DOI)
10.1016/j.rama.2019.01.009
Additional Information
Samuel P. Gersie, David J. Augustine, and Justin D. Derner "Cattle Grazing Distribution in Shortgrass Steppe: Influences of Topography and Saline Soils," Rangeland Ecology and Management 72(4), 602-614, (2 July 2019). https://doi.org/10.1016/j.rama.2019.01.009
ISSN
1550-7424
OAI Identifier
oai:repository.arizona.edu:10150/675854
Journal Volume
72
Journal Number
4
Journal Pages
602-614
Collection
Rangeland Ecology & Management (REM)
Journal Name
Rangeland Ecology & Management
Keywords
livestock grazing distributio
semiarid grassland
topographic position index
topographic wetness index
western Great Plains rangeland