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Constructing and evaluating a continent-wide migratory songbird network across the annual cycle

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dc.contributor.advisor Norris, D. Ryan Knight, Samantha 2017-08-02T19:37:11Z 2017-08-02T19:37:11Z 2017-07 2017-07-19 2017-08-02
dc.description.abstract Information about how migratory animals are spatially connected between periods of the annual cycle is essential for understanding the effects of environmental change and developing optimal conservation strategies. I constructed a migratory network for a songbird, the tree swallow (Tachycineta bicolor), using year-round movements derived from 133 light-level geolocators attached to individuals originating from 12 breeding sites across North America. I identified 10 autumn stopover nodes (regions) in North America, 13 non-breeding nodes around the Gulf of Mexico, Mexico, and the Caribbean, and 136 unique migratory pathways connecting these nodes. Using network-based metrics, I ranked the stopover and non-breeding nodes based on their contribution to network connectivity and identified three distinct ‘communities’ of nodes that corresponded to western, central, and eastern flyways. This study highlights how network-based metrics can be valuable for identifying overall network structure and prioritizing specific regions within the network, information that is crucial for effectively conserving migratory species. en_US
dc.language.iso en en_US
dc.subject geolocator en_US
dc.subject flyway en_US
dc.subject migration en_US
dc.subject migratory connectivity en_US
dc.subject tree swallow en_US
dc.title Constructing and evaluating a continent-wide migratory songbird network across the annual cycle en_US
dc.type Thesis en_US Integrative Biology en_US Master of Science en_US Department of Integrative Biology en_US
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