A comparison of the bird and aquatic macroinvertebrate communities between restored and 'natural' Iowa prairie wetlands / Philip J. Delphey.
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TextPublication details: Ames, IA : Iowa State University, 1991.Description: iii, 85 p. : ill. ; 28 cmOnline resources: Abstract: I compared the species richness and abundances of breeding birds, and the nest success of yellow-headed blackbirds (Xanthocephalus xanthocephalus) between recently restored and 'natural' prairie wetlands in northern Iowa. I studied 4 natural and 7 restored wetlands in 1989, and 7 natural and 11 restored wetlands in 1990. During 5 visits to each wetland I recorded all species present and counted birds detected within 2-5 fixed-radius circular plots. In 1990 the abundance of breeding ducks was determined by counting all pairs present,regardless of their positions relative to the circular plots. I found 22 species breeding at restored wetlands. In both years natural wetlands averaged about 3 more breeding species than restored wetlands,but both the species richness and abundance of breeding ducks were similar between wetland types. Some non-waterfowl species, however,especially common yellowthroats (Geothlypis trichas), marsh wrens (Cistothorus palustris), and red-winged blackbirds (Agelaius phoeniceus)were less abundant at restored wetlands.
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Thesis(M.S.)--Iowa State University, 1991.
Includes bibliographical references.
I compared the species richness and abundances of breeding birds, and the nest success of yellow-headed blackbirds (Xanthocephalus xanthocephalus) between recently restored and 'natural' prairie wetlands in northern Iowa. I studied 4 natural and 7 restored wetlands in 1989, and 7 natural and 11 restored wetlands in 1990. During 5 visits to each wetland I recorded all species present and counted birds detected within 2-5 fixed-radius circular plots. In 1990 the abundance of breeding ducks was determined by counting all pairs present,regardless of their positions relative to the circular plots. I found 22 species breeding at restored wetlands. In both years natural wetlands averaged about 3 more breeding species than restored wetlands,but both the species richness and abundance of breeding ducks were similar between wetland types. Some non-waterfowl species, however,especially common yellowthroats (Geothlypis trichas), marsh wrens (Cistothorus palustris), and red-winged blackbirds (Agelaius phoeniceus)were less abundant at restored wetlands.