Avian nest success in relation to past grazing regimes in a montane riparian system
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Authors: E. M. Ammon, and P. B. Stacey
Date: 1997
Journal: The Condor
Volume: 99
Number: 1
Pages: 7-13
Summary of Methods: Ammon and Stacey looked at the long term effects of cattle grazing on riparian habitat for song birds in northwestern Nevada. The authors looked at two 25-30 ha plots, one which had not seen grazing in 30 years while the other was grazed over the period, except for the year of the study. They found that nests in the shrub layer, stream willows and old growth willows were more heavily preyed upon in the grazed area than in the ungrazed area. The ground vegetation was much more abundant on the grazed area, so predation was less than that of the ungrazed area. The authors stated that although grazing can enhance some aspects of riparian habitat, its main harmful effect is changing of predation patterns or of the composition of predators.
Article Summary / Main Points: None
Vegetation Types:
MLRA Ecoregions:
Agrovoc Control Words: Grazing Rangelands Wildlife
Article Review Type: Refereed
Article Type: Experimental Research
Keywords: grazing, nest success, artificial nests, riparian birds, population declines
Annotation: Utilization was mentioned as 24 cow-calf pairs from June 8 to August 7.
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