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Predicting Greater Prairie-Chicken Nest Success from Vegetation and Landscape Characteristics
Gwen McKee, Mark R. Ryan and Larry M. Mechlin
The Journal of Wildlife Management
Vol. 62, No. 1 (Jan., 1998), pp. 314-321
Stable URL: http://www.jstor.org/stable/3802294
Page Count: 8
You can always find the topics here!Topics: Animal nesting, Bird nesting, Vegetation, Wildlife management, Prairies, Forbs, Chickens, Grouse, Wildlife habitats, Habitat conservation
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To aid management of prairie habitat for nesting greater-prairie chickens (Tympanuchus cupido pinnatus), we tested whether vegetation and landscape variables could be used to predict prairie-chicken nest success. We monitored 60 nests during the 1990-92 breeding seasons in southwestern Missouri. Nest success ranged from 28 to 40% over 3 years (x̄ = 35%). We identified 2 2-variable models (logistic regression) incorporating litter (horizontal, residual) and woody cover (P < 0.001) or forb and grass cover (P < 0.001) at nests as the best predictors of nest success. Litter cover at the nest was the best single predictor of nest success (P = 0.001). Models incorporating litter cover and distance of nests to edge or tree also predicted nest success (both Ps = 0.004). However, distance of nests to edge or tree alone or in combination did not predict nest success (all Ps > 0.5). Nest sites with litter cover >25% had a failure rate twice that of nests with <25% litter cover (P = 0.002). Nest success declined substantially when woody cover >5% was present at nests (P = 0.01), when forb cover was ≤5% (P = 0.009), or when grass cover was ≤25% (P = 0.02). We suggest that managers can use litter accumulation of >25% as a cue to initiate management action such as burning, grazing, or haying.
The Journal of Wildlife Management © 1998 Wiley