Road mitigation is a demographic filter for grizzly bears
ABSTRACT Crossing structures (i.e., underpasses and overpasses) are becoming a widespread approach to promote movement of wildlife across roads. Studies have shown that species select for different crossing structure designs, yet little is known about intraspecific variation (i.e., differences among...
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crwiley:10.1002/wsb.828 2024-06-02T08:15:37+00:00 Road mitigation is a demographic filter for grizzly bears Ford, Adam T. Barrueto, Mirjam Clevenger, Anthony P. Parks Canada's Ecological Integrity Innovation and Leadership Fund Western Transportation Institute at Montana State University Canada Research Chairs program 2017 http://dx.doi.org/10.1002/wsb.828 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fwsb.828 https://onlinelibrary.wiley.com/doi/full/10.1002/wsb.828 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Wildlife Society Bulletin volume 41, issue 4, page 712-719 ISSN 1938-5463 journal-article 2017 crwiley https://doi.org/10.1002/wsb.828 2024-05-03T10:37:14Z ABSTRACT Crossing structures (i.e., underpasses and overpasses) are becoming a widespread approach to promote movement of wildlife across roads. Studies have shown that species select for different crossing structure designs, yet little is known about intraspecific variation (i.e., differences among demographic classes) in crossing structure preference. Using data on grizzly bear ( Ursus arctos ) movement in Banff National Park (AB, Canada), we focused on selection by family groups (adult females travelling with young) and singleton (adult male or female) bears for 5 crossing structure designs distributed among 44 sites. Using data from the world's longest running monitoring program (1997–2014) on wildlife crossing structure use, we created an economic model to estimate demographic‐specific cost‐effectiveness for each crossing structure design. We found that all grizzly bears selected larger and more open structures (overpasses and open‐span bridges). Use of these structures has generally increased with time at a rate that exceeds estimates of population growth. Family groups were more selective than singletons and strongly selected overpasses. In spite of singletons’ selection for overpasses and open‐span bridges, box culverts were comparable in cost‐effectiveness. Our results suggest that structure designs targeting the selection of grizzly bear family groups are effective at restoring population connectivity, but a systematic approach to designing highway mitigation also would consider the role of lesser used structures in reducing intraspecific predation and multispecies connectivity targets. © 2017 The Wildlife Society. Article in Journal/Newspaper Ursus arctos Wiley Online Library Canada Wildlife Society Bulletin 41 4 712 719 |
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Wiley Online Library |
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crwiley |
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English |
description |
ABSTRACT Crossing structures (i.e., underpasses and overpasses) are becoming a widespread approach to promote movement of wildlife across roads. Studies have shown that species select for different crossing structure designs, yet little is known about intraspecific variation (i.e., differences among demographic classes) in crossing structure preference. Using data on grizzly bear ( Ursus arctos ) movement in Banff National Park (AB, Canada), we focused on selection by family groups (adult females travelling with young) and singleton (adult male or female) bears for 5 crossing structure designs distributed among 44 sites. Using data from the world's longest running monitoring program (1997–2014) on wildlife crossing structure use, we created an economic model to estimate demographic‐specific cost‐effectiveness for each crossing structure design. We found that all grizzly bears selected larger and more open structures (overpasses and open‐span bridges). Use of these structures has generally increased with time at a rate that exceeds estimates of population growth. Family groups were more selective than singletons and strongly selected overpasses. In spite of singletons’ selection for overpasses and open‐span bridges, box culverts were comparable in cost‐effectiveness. Our results suggest that structure designs targeting the selection of grizzly bear family groups are effective at restoring population connectivity, but a systematic approach to designing highway mitigation also would consider the role of lesser used structures in reducing intraspecific predation and multispecies connectivity targets. © 2017 The Wildlife Society. |
author2 |
Parks Canada's Ecological Integrity Innovation and Leadership Fund Western Transportation Institute at Montana State University Canada Research Chairs program |
format |
Article in Journal/Newspaper |
author |
Ford, Adam T. Barrueto, Mirjam Clevenger, Anthony P. |
spellingShingle |
Ford, Adam T. Barrueto, Mirjam Clevenger, Anthony P. Road mitigation is a demographic filter for grizzly bears |
author_facet |
Ford, Adam T. Barrueto, Mirjam Clevenger, Anthony P. |
author_sort |
Ford, Adam T. |
title |
Road mitigation is a demographic filter for grizzly bears |
title_short |
Road mitigation is a demographic filter for grizzly bears |
title_full |
Road mitigation is a demographic filter for grizzly bears |
title_fullStr |
Road mitigation is a demographic filter for grizzly bears |
title_full_unstemmed |
Road mitigation is a demographic filter for grizzly bears |
title_sort |
road mitigation is a demographic filter for grizzly bears |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1002/wsb.828 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fwsb.828 https://onlinelibrary.wiley.com/doi/full/10.1002/wsb.828 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
Wildlife Society Bulletin volume 41, issue 4, page 712-719 ISSN 1938-5463 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/wsb.828 |
container_title |
Wildlife Society Bulletin |
container_volume |
41 |
container_issue |
4 |
container_start_page |
712 |
op_container_end_page |
719 |
_version_ |
1800739846572998656 |