GRASSLAND BIRDS NESTING IN HAYLANDS OF SOUTHERN SASKATCHEWAN: LANDSCAPE INFLUENCES AND CONSERVATION PRIORITIES
| Autor: | Stephen K. Davis, D. Glen McMaster, James H. Devries |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Anas
geography Vesper sparrow geography.geographical_feature_category Ecology biology biology.organism_classification Grassland Habitat Nest Abundance (ecology) Waterfowl General Earth and Planetary Sciences Bird conservation Ecology Evolution Behavior and Systematics Nature and Landscape Conservation General Environmental Science |
| Zdroj: | Journal of Wildlife Management. 69:211-221 |
| ISSN: | 1937-2817 0022-541X |
| DOI: | 10.2193/0022-541x(2005)069<0211:gbniho>2.0.co;2 |
| Popis: | To determine the benefits to grassland birds of converting cropland to hayland in southern Saskatchewan, Canada, we quantified the relative nest abundance and success of grassland nesting birds in haylands and the influence landscape variables have on these parameters. We found nests of 26 species of grassland nesting birds, primarily waterfowl and vesper sparrow (Pooecetes gramineus). With the exception of the northern pintail (Anas acuta), few nesting attempts were recorded for species of high priority in the Prairie Pothole Bird Conservation Region. Mayfield nest success for all waterfowl (20 and 13% in 1999 and 2000, respectively) was high relative to previously reported nest success estimates in other habitat types—especially spring-seeded cropland—and was near levels thought to be required to sustain populations (15–20%). Vesper sparrow nest success (39 and 33% in 1999 and 2000, respectively) also was high relative to that reported in other studies. Haying destroyed few nests as wet weather... |
| Databáze: | OpenAIRE |
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