Reproductive responses of an apex predator to changing climatic conditions in a variable forest environment
2015 Spring. Includes bibliographical references. Apex predators are ideal subjects for evaluating the effects of changing climatic conditions on the productivity of forested landscapes, because the quality of their breeding habitat depends primarily on the availability of resources at lower trophic...
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ftcolostateunidc:oai:mountainscholar.org:10217/167042 2023-06-11T04:02:51+02:00 Reproductive responses of an apex predator to changing climatic conditions in a variable forest environment Salafsky, Susan Rebecca Hufbauer, Ruth Franklin, Alan Reynolds, Richard Savidge, Julie 2015-08-27T03:57:29Z born digital doctoral dissertations application/pdf http://hdl.handle.net/10217/167042 English eng eng Colorado State University. Libraries 2000-2019 - CSU Theses and Dissertations Salafsky_colostate_0053A_13011.pdf http://hdl.handle.net/10217/167042 Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. forest management prey abundance vegetation composition and structure northern goshawk climate change reproduction Text 2015 ftcolostateunidc 2023-05-04T17:40:07Z 2015 Spring. Includes bibliographical references. Apex predators are ideal subjects for evaluating the effects of changing climatic conditions on the productivity of forested landscapes, because the quality of their breeding habitat depends primarily on the availability of resources at lower trophic levels. Identifying the environmental factors that influence the reproductive output of apex predators can, therefore, enhance our understanding of the ecological relationships that provide the foundation for effective forest management strategies in a variable environment. To identify the determinants of breeding-habitat quality for an apex predator in a forest food web, I investigated the relationships between site-specific environmental attributes and the reproductive probabilities of northern goshawks (Accipiter gentilis) on the Kaibab Plateau, Arizona during 1999-2004. I used dynamic multistate site occupancy models to quantify annual breeding probabilities (eggs laid) and successful reproduction probabilities (≥1 young fledged) relative to temporal and spatial variation in climatic conditions (precipitation and temperature), vegetation attributes (forest composition, structure, and productivity), and prey resources (abundances of 5 mammal and bird species). Climatic conditions during the study period varied extensively, and included extreme drought in 2003 and record-high precipitation in 2004. There was also substantial variation in the amount and distribution of 4 forest cover types among 102 goshawk territories within the 1,285-km² study area. The abundance of most prey species, especially mammals, also varied considerably among years, cover types, and goshawk territories. I identified the environmental components that best explained spatiotemporal variation in goshawk reproductive parameters using an information-theoretic approach to evaluate the relative weight of evidence for each model. Out of 62 potential models representing how the distribution of territories with breeding goshawks varied among ... Text Accipiter gentilis Northern Goshawk Digital Collections of Colorado (Colorado State University) |
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Digital Collections of Colorado (Colorado State University) |
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ftcolostateunidc |
language |
English |
topic |
forest management prey abundance vegetation composition and structure northern goshawk climate change reproduction |
spellingShingle |
forest management prey abundance vegetation composition and structure northern goshawk climate change reproduction Salafsky, Susan Rebecca Reproductive responses of an apex predator to changing climatic conditions in a variable forest environment |
topic_facet |
forest management prey abundance vegetation composition and structure northern goshawk climate change reproduction |
description |
2015 Spring. Includes bibliographical references. Apex predators are ideal subjects for evaluating the effects of changing climatic conditions on the productivity of forested landscapes, because the quality of their breeding habitat depends primarily on the availability of resources at lower trophic levels. Identifying the environmental factors that influence the reproductive output of apex predators can, therefore, enhance our understanding of the ecological relationships that provide the foundation for effective forest management strategies in a variable environment. To identify the determinants of breeding-habitat quality for an apex predator in a forest food web, I investigated the relationships between site-specific environmental attributes and the reproductive probabilities of northern goshawks (Accipiter gentilis) on the Kaibab Plateau, Arizona during 1999-2004. I used dynamic multistate site occupancy models to quantify annual breeding probabilities (eggs laid) and successful reproduction probabilities (≥1 young fledged) relative to temporal and spatial variation in climatic conditions (precipitation and temperature), vegetation attributes (forest composition, structure, and productivity), and prey resources (abundances of 5 mammal and bird species). Climatic conditions during the study period varied extensively, and included extreme drought in 2003 and record-high precipitation in 2004. There was also substantial variation in the amount and distribution of 4 forest cover types among 102 goshawk territories within the 1,285-km² study area. The abundance of most prey species, especially mammals, also varied considerably among years, cover types, and goshawk territories. I identified the environmental components that best explained spatiotemporal variation in goshawk reproductive parameters using an information-theoretic approach to evaluate the relative weight of evidence for each model. Out of 62 potential models representing how the distribution of territories with breeding goshawks varied among ... |
author2 |
Hufbauer, Ruth Franklin, Alan Reynolds, Richard Savidge, Julie |
format |
Text |
author |
Salafsky, Susan Rebecca |
author_facet |
Salafsky, Susan Rebecca |
author_sort |
Salafsky, Susan Rebecca |
title |
Reproductive responses of an apex predator to changing climatic conditions in a variable forest environment |
title_short |
Reproductive responses of an apex predator to changing climatic conditions in a variable forest environment |
title_full |
Reproductive responses of an apex predator to changing climatic conditions in a variable forest environment |
title_fullStr |
Reproductive responses of an apex predator to changing climatic conditions in a variable forest environment |
title_full_unstemmed |
Reproductive responses of an apex predator to changing climatic conditions in a variable forest environment |
title_sort |
reproductive responses of an apex predator to changing climatic conditions in a variable forest environment |
publisher |
Colorado State University. Libraries |
publishDate |
2015 |
url |
http://hdl.handle.net/10217/167042 |
genre |
Accipiter gentilis Northern Goshawk |
genre_facet |
Accipiter gentilis Northern Goshawk |
op_relation |
2000-2019 - CSU Theses and Dissertations Salafsky_colostate_0053A_13011.pdf http://hdl.handle.net/10217/167042 |
op_rights |
Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. |
_version_ |
1768377432496144384 |