Changes in behavior are unable to disrupt a trophic cascade involving a specialist herbivore and its food plant
Changes in ecological conditions can induce changes in behavior and demography of wild organisms, which in turn may influence population dynamics. Black brant (Branta bernicla nigricans) nesting in colonies on the Yukon-Kuskokwim Delta (YKD) in western Alaska have declined substantially (50%) since...
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Online Access: | http://hdl.handle.net/11714/6313 https://doi.org/10.1002/ece3.5118 |
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ftunivnevadair:oai:scholarworks.unr.edu:11714/6313 2023-05-15T15:46:08+02:00 Changes in behavior are unable to disrupt a trophic cascade involving a specialist herbivore and its food plant Lohman, Madeleine G. Riecke, Thomas V. Acevedo, Cheyenne R. Person, Brian T. Schmutz, Joel A. Uher-Koch, Brian D. Sedinger, James S. 2019 PDF http://hdl.handle.net/11714/6313 https://doi.org/10.1002/ece3.5118 unknown Lohman, M. G., Riecke, T. V., Acevedo, C. R., Person, B. T., Schmutz, J. A., Uher?Koch, B. D., & Sedinger, J. S. (2019). Changes in behavior are unable to disrupt a trophic cascade involving a specialist herbivore and its food plant. Ecology and Evolution, 9(9), 5281–5291. doi:10.1002/ece3.5118 2045-7758 http://hdl.handle.net/11714/6313 doi:10.1002/ece3.5118 Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ Authors CC-BY https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.5118 behavior population dynamics black brant survival Carex subspathacea growth Article 2019 ftunivnevadair https://doi.org/10.1002/ece3.5118 2020-12-09T10:19:35Z Changes in ecological conditions can induce changes in behavior and demography of wild organisms, which in turn may influence population dynamics. Black brant (Branta bernicla nigricans) nesting in colonies on the Yukon-Kuskokwim Delta (YKD) in western Alaska have declined substantially (50%) since the turn of the century. Black brant are herbivores that rely heavily on Carex subspathacea (Hoppner's sedge) during growth and development. The availability of C. subspathacea affects gosling growth rates, which subsequently affect pre- and postfledging survival, as well as size and breeding probability as an adult. We predicted that long-term declines in C. subspathacea have affected gosling growth rates, despite the potential of behavior to buffer changes in food availability during brood rearing. We used Bayesian hierarchical mixed-effects models to examine long-term (1987-2015) shifts in brant behavior during brood rearing, forage availability, and gosling growth rates at the Tutakoke River colony. We showed that locomotion behaviors have increased (beta = 0.05, 95% CRI: 0.032-0.068) while resting behaviors have decreased (beta = -0.024, 95% CRI: -0.041 to -0.007), potentially in response to long-term shifts in forage availability and brood density. Concurrently, gosling growth rates have decreased substantially (beta = -0.100, 95% CRI: -0.191 to -0.016) despite shifts in behavior, mirroring long-term declines in the abundance of C. subspathacea (beta = -0.191, 95% CRI: -0.355 to -0.032). These results have important implications for individual fitness and population viability, where shifts in gosling behavior putatively fail to mitigate long-term declines in forage availability. Article in Journal/Newspaper Branta bernicla Kuskokwim Alaska Yukon University of Nevada, Reno: ScholarWorks Repository Brant ENVELOPE(7.105,7.105,62.917,62.917) Yukon Ecology and Evolution 9 9 5281 5291 |
institution |
Open Polar |
collection |
University of Nevada, Reno: ScholarWorks Repository |
op_collection_id |
ftunivnevadair |
language |
unknown |
topic |
behavior population dynamics black brant survival Carex subspathacea growth |
spellingShingle |
behavior population dynamics black brant survival Carex subspathacea growth Lohman, Madeleine G. Riecke, Thomas V. Acevedo, Cheyenne R. Person, Brian T. Schmutz, Joel A. Uher-Koch, Brian D. Sedinger, James S. Changes in behavior are unable to disrupt a trophic cascade involving a specialist herbivore and its food plant |
topic_facet |
behavior population dynamics black brant survival Carex subspathacea growth |
description |
Changes in ecological conditions can induce changes in behavior and demography of wild organisms, which in turn may influence population dynamics. Black brant (Branta bernicla nigricans) nesting in colonies on the Yukon-Kuskokwim Delta (YKD) in western Alaska have declined substantially (50%) since the turn of the century. Black brant are herbivores that rely heavily on Carex subspathacea (Hoppner's sedge) during growth and development. The availability of C. subspathacea affects gosling growth rates, which subsequently affect pre- and postfledging survival, as well as size and breeding probability as an adult. We predicted that long-term declines in C. subspathacea have affected gosling growth rates, despite the potential of behavior to buffer changes in food availability during brood rearing. We used Bayesian hierarchical mixed-effects models to examine long-term (1987-2015) shifts in brant behavior during brood rearing, forage availability, and gosling growth rates at the Tutakoke River colony. We showed that locomotion behaviors have increased (beta = 0.05, 95% CRI: 0.032-0.068) while resting behaviors have decreased (beta = -0.024, 95% CRI: -0.041 to -0.007), potentially in response to long-term shifts in forage availability and brood density. Concurrently, gosling growth rates have decreased substantially (beta = -0.100, 95% CRI: -0.191 to -0.016) despite shifts in behavior, mirroring long-term declines in the abundance of C. subspathacea (beta = -0.191, 95% CRI: -0.355 to -0.032). These results have important implications for individual fitness and population viability, where shifts in gosling behavior putatively fail to mitigate long-term declines in forage availability. |
format |
Article in Journal/Newspaper |
author |
Lohman, Madeleine G. Riecke, Thomas V. Acevedo, Cheyenne R. Person, Brian T. Schmutz, Joel A. Uher-Koch, Brian D. Sedinger, James S. |
author_facet |
Lohman, Madeleine G. Riecke, Thomas V. Acevedo, Cheyenne R. Person, Brian T. Schmutz, Joel A. Uher-Koch, Brian D. Sedinger, James S. |
author_sort |
Lohman, Madeleine G. |
title |
Changes in behavior are unable to disrupt a trophic cascade involving a specialist herbivore and its food plant |
title_short |
Changes in behavior are unable to disrupt a trophic cascade involving a specialist herbivore and its food plant |
title_full |
Changes in behavior are unable to disrupt a trophic cascade involving a specialist herbivore and its food plant |
title_fullStr |
Changes in behavior are unable to disrupt a trophic cascade involving a specialist herbivore and its food plant |
title_full_unstemmed |
Changes in behavior are unable to disrupt a trophic cascade involving a specialist herbivore and its food plant |
title_sort |
changes in behavior are unable to disrupt a trophic cascade involving a specialist herbivore and its food plant |
publishDate |
2019 |
url |
http://hdl.handle.net/11714/6313 https://doi.org/10.1002/ece3.5118 |
long_lat |
ENVELOPE(7.105,7.105,62.917,62.917) |
geographic |
Brant Yukon |
geographic_facet |
Brant Yukon |
genre |
Branta bernicla Kuskokwim Alaska Yukon |
genre_facet |
Branta bernicla Kuskokwim Alaska Yukon |
op_source |
https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.5118 |
op_relation |
Lohman, M. G., Riecke, T. V., Acevedo, C. R., Person, B. T., Schmutz, J. A., Uher?Koch, B. D., & Sedinger, J. S. (2019). Changes in behavior are unable to disrupt a trophic cascade involving a specialist herbivore and its food plant. Ecology and Evolution, 9(9), 5281–5291. doi:10.1002/ece3.5118 2045-7758 http://hdl.handle.net/11714/6313 doi:10.1002/ece3.5118 |
op_rights |
Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ Authors |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/ece3.5118 |
container_title |
Ecology and Evolution |
container_volume |
9 |
container_issue |
9 |
container_start_page |
5281 |
op_container_end_page |
5291 |
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1766380815462170624 |