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    Black-Tailed Prairie Dog Effects on Montana's Mixed-Grass Prairie

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    Author
    Johnson-Nistler, Carolyn M.
    Sowell, Bok F.
    Sherwood, Harrie W.
    Wambolt, Carl L.
    Issue Date
    2004-11-01
    Keywords
    Cynomys ludovicianus
    vegetation
    nutrition
    herbivory
    
    Metadata
    Show full item record
    Citation
    Johnson-Nistler, C. M., Sowell, B. F., Sherwood, H. W., & Wambolt, C. L. (2004). Black-tailed prairie dog effects on Montana's mixed-grass prairie. Journal of Range Management, 57(6), 641-648.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/643220
    DOI
    10.2111/1551-5028(2004)057[0641:BPDEOM]2.0.CO;2
    10.2307/4004022
    10.2458/azu_jrm_v57i6_johnson-nistler
    Additional Links
    https://rangelands.org/
    Abstract
    Forty paired sites were examined on the mixed-grass prairie of northeastern Montana to compare the effects of black-tailed prairie dog (Cynomys ludovicianus) colonies on native range vegetation. Thirty 0.25-m2 quadrats were placed on colonized and uncolonized locations and matched by environmental conditions. Cover and standing crop biomass of each plant species was estimated using a double sampling procedure where every third plot was clipped and estimated. A total of 2 400 quadrats were estimated, whereas 720 quadrats were clipped during the months of May-August of 2000 and 2001. Crude protein, digestibility, neutral detergent fiber, and acid detergent fiber were determined on the basis of vegetative classes (cool-season grasses, warm-season grasses, standing dead grass, forbs, and dwarf shrubs). Pairwise comparisons were made using paired t tests and differences were declared significant at the 0.05 level. Plant biomass of colonized sites was dominated by fringed sagewort (Artemisia frigida Willd.) (42%), blue grama (Bouteloua gracilis [HBK] Lag. ex Steud) (16%), and western wheatgrass (Agropyron smithii Rydb.) (16%). Uncolonized sites were dominated by Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis Beetle and Young) (36%), western wheatgrass (13%), and blue grama (12%). Standing crop biomass, plant species richness, litter, standing crop crude protein, sagebrush canopy cover, and density were greater (P < 0.05) on uncolonized areas compared to colonized areas. Bare ground and crude protein concentration were greater (P < 0.05) on areas colonized by prairie dogs compared to uncolonized areas. Digestibility and fiber content of both areas were not different (P > 0.05). Activities associated with prairie dog colonies reduced plant productivity and plant species richness of the mixed-grass prairie by reducing cool-season perennial grasses and litter, increasing bare ground, and eliminating big sagebrush.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2111/1551-5028(2004)057[0641:BPDEOM]2.0.CO;2
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    Journal of Range Management, Volume 57, Number 6 (November 2004)

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