What is it about?

Almost all habitats used by greater sage-grouse are grazed by domestic livestock, and rotational grazing systems have been proposed as a way to increase compatibility between livestock grazing and greater sage-grouse. We studied nesting sage-grouse on >30 central Montana ranches to test whether rotational grazing systems and rest from grazing provided additional hiding cover or increased nest success rates. We observed only minor differences in hiding cover and found little evidence that rotational grazing systems or rest from grazing increased nest success relative to ranches using other types of grazing management.

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Why is it important?

Grazing occurs on almost all lands occupied by greater sage-grouse, yet there have been very few studies linking grazing to sage-grouse behavior or demography. Therefore, most guidelines for managing grazing in sage-grouse habitat are based on indirect or circumstantial evidence. Our study tests a management practice commonly recommended to improve habitat quality and finds little evidence that it produces the intended benefits.

Perspectives

In addition to finding no evidence of benefits to sage-grouse, our results are consistent with a broad body of literature indicating rotational grazing systems have minimal effects on vegetation. Differences in canopy cover and height of herbaceous vegetation, litter, and bare ground between rotational and other grazing systems were negligible compared to spatial and inter-annual variation.

Joseph Smith
The University of Montana

Read the Original

This page is a summary of: Effects of rotational grazing management on nesting greater sage-grouse, The Journal of Wildlife Management, September 2017, Wiley,
DOI: 10.1002/jwmg.21344.
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