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Journal Article

Response of Songbirds to Glyphosate-Induced Habitat Changes on Clearcuts

David J. Santillo, Patrick W. Brown and David M. Leslie, Jr.
The Journal of Wildlife Management
Vol. 53, No. 1 (Jan., 1989), pp. 64-71
Published by: Wiley on behalf of the Wildlife Society
DOI: 10.2307/3801307
Stable URL: http://www.jstor.org/stable/3801307
Page Count: 8

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Topics: Herbicides, Songbirds, Birds, Vegetation, Bird songs, Habitat destruction, Leaves, Aviculture, Sparrows, Hardwoods
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Response of Songbirds to Glyphosate-Induced Habitat Changes on Clearcuts
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Abstract

We examined breeding bird populations and habitats on glyphosate (nitrogen-phosphonomethyl glycine) (Roundup, Monsanto, St. Louis, Mo.)-treated and untreated clearcuts in north-central Maine. Treatment of clearcuts with glyphosate herbicide reduced the complexity of vegetation through 3 years post-treatment compared to untreated clearcuts. Total numbers of birds, common yellowthroats (Geothlypis trichas), Lincoln's sparrows (Melospiza lincolnii), and alder flycatchers (Empidonax alnorum) were less abundant (P < 0.05) on treated clearcuts than on untreated clearcuts. Songbird densities were correlated with habitat complexity, especially hardwood regeneration, foliage height diversity (FHD), and vegetation height. Leaving untreated patches of vegetation and staggering herbicide treatments on large clearcuts will maintain bird populations similar to those on untreated clearcuts.

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