Density and Abundance of Secretive Marsh Birds in Iowa

dc.contributor.author Dinsmore, Stephen
dc.contributor.author Harms, Tyler
dc.contributor.author Dinsmore, Stephen
dc.contributor.author Harms, Tyler
dc.contributor.department Natural Resource Ecology and Management
dc.date 2018-02-15T21:00:08.000
dc.date.accessioned 2020-06-30T06:13:36Z
dc.date.available 2020-06-30T06:13:36Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 2012
dc.date.embargo 2015-03-02
dc.date.issued 2012-06-01
dc.description.abstract <p>A decrease in wetland habitats throughout North America has caused a decline in populations of marsh birds. The objective of this study was to estimate population densities and abundances of secretive marsh birds in Iowa. Call-broadcast surveys were conducted in conjunction with distance sampling for eight species of marsh birds at wetlands in three regions of Iowa during 2009 and 2010. Regions were defined by observed microhabitat characteristics which also corresponded to physiographic regions. Region-specific density estimates were obtained using Program Distance for four species of marsh birds for which sufficient detections existed (Pied-billed Grebe [<em>Podilymbus podiceps</em>], Least Bittern [<em>Ixobrychus exilis</em>], Virginia Rail [<em>Rallus limicola</em>] and Sora [<em>Porzana carolina</em>]). The range of density estimates was 0.019 birds/ha (95% CI = 0.014-0.024) for Least Bittern to 0.12 birds/ha (95% CI = 0.11-0.14) for Pied-billed Grebe. Density estimates were highest in Region 2 for Pied-billed Grebe, Region 1 for Virginia Rail, and Region 3 for Sora. Least Bittern density was similar between Regions 1 and 2, but was 0.027 birds/ha lower in Region 3. The need to focus conservation efforts on areas of the state where large amounts of suitable habitat exist and marsh bird densities are highest is illustrated by the observed differences in species' densities across regions. Information on the current population status of marsh birds in Iowa and regions where conservation efforts can be directed are provided by these density estimates.</p>
dc.description.comments <p>This article is from <em>Waterbirds</em> 35 (2012): 208, doi:<a href="http://dx.doi.org/10.1675/063.035.0203">10.1675/063.035.0203</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/nrem_pubs/42/
dc.identifier.articleid 1041
dc.identifier.contextkey 6757477
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath nrem_pubs/42
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/56388
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/nrem_pubs/42/2012_Dinsmore_DensityAbundance.pdf|||Sat Jan 15 00:12:11 UTC 2022
dc.source.uri 10.1675/063.035.0203
dc.subject.disciplines Natural Resources Management and Policy
dc.subject.disciplines Ornithology
dc.subject.disciplines Population Biology
dc.subject.disciplines Poultry or Avian Science
dc.subject.keywords bittern
dc.subject.keywords call-broadcast
dc.subject.keywords density
dc.subject.keywords distance sampling
dc.subject.keywords grebe
dc.subject.keywords marsh bird
dc.subject.keywords point count
dc.subject.keywords rail
dc.title Density and Abundance of Secretive Marsh Birds in Iowa
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 93cc6656-8f88-4982-be9c-06bedefca35f
relation.isAuthorOfPublication bdc16099-d09f-40ab-8e99-fb0fb339efca
relation.isOrgUnitOfPublication e87b7b9d-30ea-4978-9fb9-def61b4010ae
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