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Monday, January 28 • 11:00am - 11:20am
(WILDLIFE: WETLAND CONSERVATION) Habitat Relationships of Virginia Rails and Soras in Impounded Marshes Within the Western Lake Erie Basin of Ohio

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AUTHORS: Nicole Hengst, The Ohio State University; James Hansen, The Ohio State University; Brendan Shirkey, Winous Point Marsh Conservancy; John Simpson, Winous Point Marsh Conservancy; Robert Gates, The Ohio State University

ABSTRACT: Secretive marsh bird populations are threatened by habitat loss throughout their ranges. In Ohio, Virginia rails (Rallus limicola) and soras (Porzana carolina) are species of concern and legally harvested. Very little work has been conducted to understand movements and habitat selection by Virginia rails and soras in coastal wetlands of the western Lake Erie basin. Managed wetlands are an important source of rail habitat in Ohio, yet little is known about how manipulation of water levels to produce food and cover for waterfowl affects migrating and breeding rails. Virginia rails and soras were captured and fitted with VHF radio-transmitters and tracked daily during March-September, 2016-2018. Twenty-seven percent of radio-marked rails migrated or dispersed from the study site within 1-2 days of capture in May-August. Mean home range sizes were 6.51 and 3.67 ha (SE = 1.40, n = 57 and SE = 0.95, n = 7) for Virginia rails and soras, respectively. Of the 166 radio-marked rails that remained at the study site at least one day after capture, 138 used only one impoundment unit at the study site. This allowed us to examine movement patterns of Virginia rails and soras in response to water level changes during 2016-2018. Vegetation surveys were conducted in 2018 to compare differences in habitat characteristics between locations of radio-marked rails and random points and to identify wetland habitat characteristics that rails select for as water levels change. Vegetation surveys were conducted weekly at individual radio-locations and at the end of the growing season within home ranges of radio-marked rails. Twenty-two percent of the weekly surveys indicated rails using areas dominated by cattail (Typha spp.) with water cover <40% and medium interspersion. This work will provide additional understanding of rail ecology and aid in better informed wetland management for rail species in northern Ohio.

Monday January 28, 2019 11:00am - 11:20am

Attendees (17)