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| Web URL(s): | http://www.jstor.org/stable/2641027?seq=1#page_scan_tab_contents
Last checked: 09/17/2015
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| Author(s): | Vierling, Kerri T. |
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| Author Affiliation: | South Dakota School of Mines and Technology, Rapid City, South Dakota |
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| Title: | Source and sink habitats of red-winged blackbirds in a rural/suburban landscape |
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| Source: | Ecological Applications: A publication of the Ecological Society of America. Vol. 10, No. 4, August 2000, p. 1211-1218. |
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| Publishing Information: | Washington, DC: Ecological Society of America |
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| # of Pages: | 8 |
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| Keywords: | TIC Keywords: Predation; Habitats; Reproduction; Breeding; Breeding season; Aves; Case studies; Nature conservation
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| Abstract/Contents: | "The objectives of this study were to distinguish demographic source and sink habitats of Red-winged Blackbirds (Agelaius phoeniceus) and to determine the factors influencing source-sink status prior to fledging. In Boulder County, Colorado, I monitored 591 nests between 1995 and 1997 in breeding habitats that were either natural (wetlands, tallgrass prairie) or anthropogenic (hayfields, roadside ditches). To determine source-sink status, I calculated the productivity necessary to offset mortality. Predation was the main determinant of source-sink status, while brood parasitism had virtually no impact on this population. Anthropogenic habitats consistently functioned as sinks throughout the three-year study. Sources occurred only in natural habitats, and source sites had fewer buildings nearby than did sinks. In addition, climate variability may have influenced reproduction by influencing egg-laying dates. In 1995, possible source habitats included tallgrass prairie and wetlands. In 1996, tallgrass prairie functioned as a strong source, but in 1997 none of the natural habitats functioned as sources. The Boulder suburban area appeared to function as a regional sink during this study, possibly because human activity attracts high densities of human-commensal predators such as raccoons and corvids that depredate Red-winged Blackbird nests." |
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| Language: | English |
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| References: | 48 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Vierling, K. T. 2000. Source and sink habitats of red-winged blackbirds in a rural/suburban landscape. Ecol. Appl. 10(4):p. 1211-1218. |
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| Web URL(s):
http://www.jstor.org/stable/2641027?seq=1#page_scan_tab_contents
Last checked: 09/17/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access web site |
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MSU catalog number: QH 540 .E273 |
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