2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
9/26/2018 | 8:35 AM - 8:50 AM | Southern White-Tailed Ptarmigan (Lagopus leucura altipetens) Population Assessment and Conservation Considerations in Colorado | Eccles Conference Center Auditorium
Southern White-Tailed Ptarmigan (Lagopus leucura altipetens) Population Assessment and Conservation Considerations in Colorado
An essential task facing wildlife managers today is having the ability to assess population dynamics of wildlife species and determine how populations will respond to current and projected environmental changes. Complicating this mission is defining and evaluating populations across multiple spatial scales. Colorado with its extensive concentration of mountainous habitats supports one of five purported subspecies of white-tailed ptarmigan (Lagopus leucura altipetens) – an alpine endemic grouse proposed for listing under the Endangered Species Act. With the listing decision pending, information was needed regarding population status and future population projections. Incorporating the spatial and temporal variation in the demographic and abundance rates measured at six study sites from 2013-2017, we developed an Integrated Population Model to provide an overall risk assessment of populations across multiple spatial scales and evaluate extinction probabilities over the next 100 years. At the state level scale, this population showed little evidence of an increase or decrease in abundance and low probability of extinction. Considering the subpopulation level defined by fine-scale genetic structure, we also found evidence for stable populations. At the finest spatial scale of a survey site, we again found relative stability, with the exception of one site where we observed declines during each year of our study and high predicted extinction potential. We believe this observed decline was the consequence of localized increases in human recreation and a resultant apparent emigration of birds. Given this observation, we suggest managers develop practices to monitor and address negative impacts of increased human recreation especially in the light of future projected climate change impacts.
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Presenters/Authors
Amy Seglund
(), Colorado Parks and Wildlife, amy.seglund@state.co.us;
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Phillip Street
(), pstreet@cabnr.unr.edu;
Ecology, Evolution, and Conservation Biology
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Jon Runge
(), Jon.runge@state.co.us;
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