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Painted Bunting Breeding Bird Survey trends associated with landscape changes in Georgia and South Carolina

Program for the One Hundred and Eighteenth Stated Meeting of the American Ornithologists' Union in conjunction with the 19th Annual Meeting of the Society of Canadian Ornithologists, Societe des Ornithologistes du Canada and the British Ornithologists' Union, August 14-19, 2000. OCLC: 45282415
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Abstract

Landscape changes during the first 3 decades of the Breeding Bird Survey (BBS) may account for the Painted Bunting's declining population trend. In the southeastern U.S., it is estimated that this bunting has declined 3.5 % per year since 1966. I collected landscape data centered on identical 5-stop areas (n = 33, 306 ha each) of the BBS during early (1960s - 1970s) and late decades (1980s - 1990s). Peak 30-yr counts for Painted Buntings were found at the center of the 5-stop areas. I used stepwise multiple regression analysis to model the mean number of Painted Buntings (in the area during 3 yr, dependent variable) associated with landscape metrics (independent variables). During the early decades the average amount of edge on developed land (p = 0.10), average patch size of agriculture land (p = 0.01), average size of shrub-scrub and young forest (p = 0.09), and average amount of edge for emergent wetlands (p = 0.03) explained 40% of the variation in Painted Buntings counts. In the late decades average amount of edge on developed land (p = 0.04) and average amount of edge on emergent wetlands (p = 0.005) explained 35% of the variation in Painted Bunting counts. Large losses of agricultural land (proportion = 0.177 to 0.094), which was developed or converted to intensively managed pin plantations, may have reduced potential bunting breeding habitat. Shrub-scrub and young forest habitat was constant (proportion = 0.136 to 0.134) but did not affect mean counts of buntings in the late decades. Protected emergent wetlands remained constnat also from the early to late decades (proportion = 0.056 to 0.06) and may provide habitat to maintain a smaller Painted Bunting population. At this time, it's unclear how develped land, which is increasing (proportion = 0.036 to 0.088), may be affecting the Painted Bunting population in GS and SC.

Additional Publication Details

Publication type:
Book chapter
Publication Subtype:
Book Chapter
Title:
Painted Bunting Breeding Bird Survey trends associated with landscape changes in Georgia and South Carolina
Year Published:
2000
Language:
English
Publisher:
Memorial University of Newfoundland
Publisher location:
St. John's, Newfoundland, Canada
Contributing office(s):
Patuxent Wildlife Research Center
Description:
154
Larger Work Type:
Book
Larger Work Subtype:
Other Government Series
Larger Work Title:
Living on the Edge -- Birds 2000: Abstracts
First page:
35
Last page:
36