Effects of livestock grazing on nesting sage-grouse in central Montana

Joseph T. Smith, Jason D. Tack, Lorelle I. Berkeley, Mark Szczypinski, David E. Naugle

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Grazing by domestic livestock is ubiquitous in the sagebrush (Artemisia spp.) biome of western North America. Widespread, long-term population declines in greater sage-grouse (Centrocercus urophasianus) have elicited concern about negative effects of livestock grazing on sage-grouse populations. Hypothesized relationships, mostly untested, between livestock and sage-grouse nesting ecology have played a prominent role in shaping public land livestock grazing policy and broader discussions about management of grazing in sagebrush ecosystems. We tested predictions arising from several commonly hypothesized mechanisms by which livestock may affect nesting habitat quality for sage-grouse in a grazed landscape in central Montana, USA. We employed Bayesian variable selection methods to identify factors related to both nest site selection and nest success, focusing on indices of livestock use at local and pasture scales and including other factors known to influence nesting ecology such as anthropogenic features and weather. In spite of some evidence nest survival was positively associated with senesced vegetation height, evidence for effects of livestock presence and indices of local livestock use on nest site selection and survival was equivocal at best. In contrast, we found strong evidence that females selected nest sites based on relatively static features such as sagebrush cover and distance from gravel and paved roads, whereas nest failure was driven primarily by extended periods of heavy precipitation. Management of sage-grouse nesting habitat in this region should focus on conserving areas of adequate shrub cover and preventing further fragmentation by roads.

    Original languageEnglish
    Pages (from-to)1503-1515
    Number of pages13
    JournalJournal of Wildlife Management
    Volume82
    Issue number7
    DOIs
    StatePublished - Sep 2018

    Keywords

    • Centrocercus urophasianus
    • greater sage-grouse
    • habitat selection
    • livestock
    • nest survival
    • northern Great Plains
    • roads
    • weather

    Fingerprint

    Dive into the research topics of 'Effects of livestock grazing on nesting sage-grouse in central Montana'. Together they form a unique fingerprint.

    Cite this