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Variation in Habitat Selection, Seasonal Movements, and Reproductive Output of a Facultative Migrant, the Great Gray Owl.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Variation in Habitat Selection, Seasonal Movements, and Reproductive Output of a Facultative Migrant, the Great Gray Owl./
作者:	Gura, Katherine Blair.
面頁冊數:	1 online resource (184 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-11, Section: B.
Contained By:	Dissertations Abstracts International84-11B.
標題:	Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30489590click for full text (PQDT)
ISBN:	9798379561932

Variation in Habitat Selection, Seasonal Movements, and Reproductive Output of a Facultative Migrant, the Great Gray Owl.
Gura, Katherine Blair.

Variation in Habitat Selection, Seasonal Movements, and Reproductive Output of a Facultative Migrant, the Great Gray Owl. - 1 online resource (184 pages)

Source: Dissertations Abstracts International, Volume: 84-11, Section: B.

Thesis (Ph.D.)--University of Wyoming, 2023.

Includes bibliographical references

Identifying key habitat, responses to environmental change, and determinants of fitness are primary goals in ecology. I investigated mechanisms underlying variation in resource selection, movement behavior, and reproductive performance of Great Gray Owls in the Greater Yellowstone Ecosystem in Wyoming and Idaho, USA. In Chapter 1, I quantified resource selection of adult owls (n = 42) and observed different patterns of selection depending on spatiotemporal scale, including between the breeding versus winter seasons. In Chapter 2, I evaluated whether breeding-season resource selection by adult male owls (n = 19) varied across diurnal periods, to improve understanding of foraging and nocturnal habitat. Owls avoided herbaceous wetlands during daytime but strongly selected them at dawn, dusk, and night. They also chose nighttime microhabitat that enabled foraging, such as presence of primary prey and open understories. In Chapter 3, I evaluated whether snow conditions influenced proximate habitat choices and/or migratory movements by Great Gray Owls. Owls proximately avoided deeper snow and more severe wind crusts, whereas probability of migration increased with more severe and persistent ice crusts. Owls appeared to be behaviorally plastic, adopting different strategies depending on the spatial scale and duration of limiting conditions. In Chapter 4, I investigated whether breeding-season prey abundance or prior winter snow conditions influenced reproductive output. Snow conditions during the preceding winter carried over to determine subsequent breeding. Such detailed assessments of factors across scales and contexts contribute to a more thorough understanding of resource requirements, susceptibility to environmental change, and population dynamics.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798379561932Subjects--Topical Terms:

516476
Ecology.
Subjects--Index Terms:

Carry-over effectIndex Terms--Genre/Form:

542853
Electronic books.

Variation in Habitat Selection, Seasonal Movements, and Reproductive Output of a Facultative Migrant, the Great Gray Owl.
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