Nest Site Selection In Hudsonian Godwits: Effects Of Habitat And Predation Risk
The choice of where to nest has enormous fitness consequences for individuals and, when scaled up, can even affect population demography. Nest site selection in birds is, therefore, guided by a wide variety of proximate and ultimate factors, including protection from predators, access to favorable m...
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ftcornelluniv:oai:ecommons.cornell.edu:1813/43692 2023-05-15T15:04:52+02:00 Nest Site Selection In Hudsonian Godwits: Effects Of Habitat And Predation Risk Swift, Rose Rodewald,Amanda Dumin Fitzpatrick,John Weaver Koenig,Walter D 2016-02-01 application/pdf https://hdl.handle.net/1813/43692 en_US eng bibid: 9597203 https://hdl.handle.net/1813/43692 habitat selection spatial aggregation shorebird dissertation or thesis 2016 ftcornelluniv 2020-02-02T14:51:07Z The choice of where to nest has enormous fitness consequences for individuals and, when scaled up, can even affect population demography. Nest site selection in birds is, therefore, guided by a wide variety of proximate and ultimate factors, including protection from predators, access to favorable microclimates, proximity to food resources, and costs/benefits stemming from interactions with neighboring con- and hetero-specifics. Nevertheless, the features associated with, cues used to identify, and availability of favorable nest sites may be changing rapidly with accelerating human development and climate change, especially in the Arctic and sub-Arctic. I investigated how habitat characteristics, predation risk, and proximity to human disturbance (i.e., roads) influenced nest site selection for the Hudsonian Godwit (Limosa haemastica). First, I identified habitat characteristics most associated with nests of Hudsonian Godwits in two breeding populations - Beluga River, Alaska and Churchill, Manitoba. I was particularly interested in habitat attributes that are (or will be) strongly impacted by climate change and human development. Second, I assessed the spatial pattern of nests in Beluga River, Alaska to evaluate if there was evidence of aggregation and then determined the extent to which nest location and fate were associated with predation risk and habitat features. Hudsonian Godwits displayed strong preferences for certain habitat features when selecting nest sites, with individuals preferring nest sites with less bare ground and more graminoid and tall shrubby cover than random locations. Nest site preferences were relatively similar in the two study populations, though birds in Churchill also preferred to nest near shallow water. Given the demonstrated preferences of nesting godwits, our study suggests that habitat degradation due to grubbing by overabundant Snow Geese (Chen caerulescens) and changing climate will reduce the suitability and availability of habitats for breeding godwits. My study also provides evidence that, despite the importance of nesting habitat attributes, additional factors must be guiding nest site selection because nests of godwits were clustered within bogs. Because the spatial aggregation of nests was not explained by either underlying patchiness in habitat or by predation risk, I suggest that clustering may be related to social cues. Therefore, understanding behavioral processes can be as important as ecological requirements for habitat selection. 2021-02-01 Other/Unknown Material Arctic Beluga Beluga* Churchill Climate change Alaska Cornell University: eCommons@Cornell Arctic |
institution |
Open Polar |
collection |
Cornell University: eCommons@Cornell |
op_collection_id |
ftcornelluniv |
language |
English |
topic |
habitat selection spatial aggregation shorebird |
spellingShingle |
habitat selection spatial aggregation shorebird Swift, Rose Nest Site Selection In Hudsonian Godwits: Effects Of Habitat And Predation Risk |
topic_facet |
habitat selection spatial aggregation shorebird |
description |
The choice of where to nest has enormous fitness consequences for individuals and, when scaled up, can even affect population demography. Nest site selection in birds is, therefore, guided by a wide variety of proximate and ultimate factors, including protection from predators, access to favorable microclimates, proximity to food resources, and costs/benefits stemming from interactions with neighboring con- and hetero-specifics. Nevertheless, the features associated with, cues used to identify, and availability of favorable nest sites may be changing rapidly with accelerating human development and climate change, especially in the Arctic and sub-Arctic. I investigated how habitat characteristics, predation risk, and proximity to human disturbance (i.e., roads) influenced nest site selection for the Hudsonian Godwit (Limosa haemastica). First, I identified habitat characteristics most associated with nests of Hudsonian Godwits in two breeding populations - Beluga River, Alaska and Churchill, Manitoba. I was particularly interested in habitat attributes that are (or will be) strongly impacted by climate change and human development. Second, I assessed the spatial pattern of nests in Beluga River, Alaska to evaluate if there was evidence of aggregation and then determined the extent to which nest location and fate were associated with predation risk and habitat features. Hudsonian Godwits displayed strong preferences for certain habitat features when selecting nest sites, with individuals preferring nest sites with less bare ground and more graminoid and tall shrubby cover than random locations. Nest site preferences were relatively similar in the two study populations, though birds in Churchill also preferred to nest near shallow water. Given the demonstrated preferences of nesting godwits, our study suggests that habitat degradation due to grubbing by overabundant Snow Geese (Chen caerulescens) and changing climate will reduce the suitability and availability of habitats for breeding godwits. My study also provides evidence that, despite the importance of nesting habitat attributes, additional factors must be guiding nest site selection because nests of godwits were clustered within bogs. Because the spatial aggregation of nests was not explained by either underlying patchiness in habitat or by predation risk, I suggest that clustering may be related to social cues. Therefore, understanding behavioral processes can be as important as ecological requirements for habitat selection. 2021-02-01 |
author2 |
Rodewald,Amanda Dumin Fitzpatrick,John Weaver Koenig,Walter D |
format |
Other/Unknown Material |
author |
Swift, Rose |
author_facet |
Swift, Rose |
author_sort |
Swift, Rose |
title |
Nest Site Selection In Hudsonian Godwits: Effects Of Habitat And Predation Risk |
title_short |
Nest Site Selection In Hudsonian Godwits: Effects Of Habitat And Predation Risk |
title_full |
Nest Site Selection In Hudsonian Godwits: Effects Of Habitat And Predation Risk |
title_fullStr |
Nest Site Selection In Hudsonian Godwits: Effects Of Habitat And Predation Risk |
title_full_unstemmed |
Nest Site Selection In Hudsonian Godwits: Effects Of Habitat And Predation Risk |
title_sort |
nest site selection in hudsonian godwits: effects of habitat and predation risk |
publishDate |
2016 |
url |
https://hdl.handle.net/1813/43692 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Beluga Beluga* Churchill Climate change Alaska |
genre_facet |
Arctic Beluga Beluga* Churchill Climate change Alaska |
op_relation |
bibid: 9597203 https://hdl.handle.net/1813/43692 |
_version_ |
1766336616633204736 |