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DTSTART;TZID=America/New_York:20261109T120000
DTEND;TZID=America/New_York:20261109T130000
DTSTAMP:20261018T114934
CREATED:20261016T160730Z
LAST-MODIFIED:20261016T160730Z
UID:10000045-1794225600-1794229200@americanornithology.org
SUMMARY:Does ecological specificity predict patterns of genetic diversity\, differentiation\, and divergence in a Central American assemblage?
DESCRIPTION:AOS Research Grant Seminar\nPresenter: Jack Hruska\, Postdoctoral Research Associate\, University of Nebraska-Lincoln; 2020 AOS Alexander Wetmore Memorial Research Grant winner \n  \n \nEcological interactions have been shown to be predictive of genetic diversity and divergence. Until recently\, these traits were largely ignored by the field of comparative phylogeography\, which seeks to explain the biotic and abiotic factors that determine population persistence across landscapes. Employing a comparative phylogeographic approach\, we test the predictions of the specialist-generalist variation hypothesis (SGVH) and ask if habitat specificity is predictive of genetic diversity\, differentiation\, and divergence\, in an assemblage of co-distributed birds of northern Central America. While we do not find strong support for the predictions of the SGVH\, we find diversity and differentiation patterns to suggest that ecological specificity is somewhat predictive of genetic outcomes across this assemblage. \n  \n  \n  \n  \n  \n 
URL:https://americanornithology.org/calendar/does-ecological-specificity-predict-patterns-of-genetic-diversity-differentiation-and-divergence-in-a-central-american-assemblage/
CATEGORIES:Events
LOCATION:https://americanornithology-org.zoom.us/webinar/register/WN_MU_-78dlRIGDXcQwqt3f2A
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20261116T120000
DTEND;TZID=America/New_York:20261116T130000
DTSTAMP:20261018T114934
CREATED:20261016T161012Z
LAST-MODIFIED:20261016T161012Z
UID:10000046-1794830400-1794834000@americanornithology.org
SUMMARY:Testing abiotic and biotic drivers of fitness and range limits along an elevational gradient in a Himalayan bird
DESCRIPTION:AOS Research Grant Seminar\nPresenter: Pranav Gokhale\, Ph.D. student\, Georgia Institute of Technology; 2025 AOS Alexander Wetmore Memorial Research Grant winner \n  \n \nIn this talk\, I will examine how abiotic and biotic factors shape reproductive success and elevational range limits in Hume’s Warbler across a steep elevational gradient in the western Himalaya. Through intensive nest monitoring\, camera traps\, insect sampling\, and measurements of temperature and precipitation\, I ask how different mechanisms constrain reproduction at the lower and upper limits of the species’ range. I will also show how selection varies among years but can stabilize over longer timescales\, providing insight into how different ecological pressures at opposite range limits may contribute to the evolution of species’ distributions. \n  \n  \n  \n  \n  \n  \n  \n 
URL:https://americanornithology.org/calendar/testing-abiotic-and-biotic-drivers-of-fitness-and-range-limits-along-an-elevational-gradient-in-a-himalayan-bird/
CATEGORIES:Events
LOCATION:https://americanornithology-org.zoom.us/webinar/register/WN_UT5eqYSdS1qLJYIlVJEUaA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20261123T120000
DTEND;TZID=America/New_York:20261123T130000
DTSTAMP:20261018T114934
CREATED:20261016T161259Z
LAST-MODIFIED:20261016T161259Z
UID:10000047-1795435200-1795438800@americanornithology.org
SUMMARY:Beyond Presence-Absence: Using passive acoustic surveys to estimate the abundance of Arctic-breeding birds
DESCRIPTION:AOS Research Grant Seminar\nPresenter: Morgan Ziegenhorn\, Senior Data Scientist and Acoustic Ecologist | Manomet Conservation Sciences\, Manomet Conservation Sciences; 2025 Kessel Fellowship winner \n  \nEstimating density\, rather than presence-absence\, remains a major challenge for passive acoustic monitoring. However\, density estimates are required to produce population size estimates\, which are a prerequisite for effective management of avian species. In this seminar\, Dr. Ziegenhorn will present and discuss the challenges\, setbacks\, and\, ultimately\, results of a novel method for density estimation that uses a modified version of traditional distance sampling to generate robust density estimates of Arctic-breeding birds from acoustic surveys and deep learning outputs. Ultimately\, the development of efficient\, automated abundance estimation methods such as this is critical for diversifying the monitoring approaches available for fast-declining bird populations. \n  \n  \n  \n  \n  \n  \n  \n  \n  \n 
URL:https://americanornithology.org/calendar/beyond-presence-absence-using-passive-acoustic-surveys-to-estimate-the-abundance-of-arctic-breeding-birds/
CATEGORIES:Events
LOCATION:https://americanornithology-org.zoom.us/webinar/register/WN_JGdGKsoDRQaxwojrwD2GPw
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20261130T120000
DTEND;TZID=America/New_York:20261130T130000
DTSTAMP:20261018T114934
CREATED:20261016T161612Z
LAST-MODIFIED:20261016T162540Z
UID:10000048-1796040000-1796043600@americanornithology.org
SUMMARY:Urban traffic noise disrupts auditory discrimination performance in Zebra Finches
DESCRIPTION:AOS Research Grant Seminar\nPresenter: Nicole St. Jacques\, Ph.D. candidate\, City University of New York; AOS 2025 Student Research Grant winner \n  \nAnthropogenic urban and traffic noise has been shown to disrupt vocal learning and impact associated neural substrates in juvenile songbirds. However\, less is known about how traffic noise influences auditory song perception and physiological processes in adults. In this talk\, I will share current results from an ongoing operant discrimination task using adult male and female Zebra Finches\, suggesting that New York City traffic noise disrupts song discrimination abilities. Results from a fecal corticosterone analysis revealed that traffic-exposed birds did not have more corticosterone than controls\, suggesting traffic noise may not increase stress\, but disrupt sensory processing\, attention\, and motivation. \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n 
URL:https://americanornithology.org/calendar/urban-traffic-noise-disrupts-auditory-discrimination-performance-in-zebra-finches/
CATEGORIES:Events
LOCATION:https://americanornithology-org.zoom.us/webinar/register/WN_HoBEiXrLTviwUCxCDn5ykw
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