The role of density-dependent and -independent processes in spawning habitat selection by salmon in an Arctic riverscape.
Density-dependent (DD) and density-independent (DI) habitat selection is strongly linked to a species' evolutionary history. Determining the relative importance of each is necessary because declining populations are not always the result of altered DI mechanisms but can often be the result of D...
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ftdoajarticles:oai:doaj.org/article:045cbc3d33694ad2aaa49da0506aed0c 2023-05-15T15:10:17+02:00 The role of density-dependent and -independent processes in spawning habitat selection by salmon in an Arctic riverscape. Brock M Huntsman Jeffrey A Falke James W Savereide Katrina E Bennett 2017-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0177467 https://doaj.org/article/045cbc3d33694ad2aaa49da0506aed0c EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC5439693?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0177467 https://doaj.org/article/045cbc3d33694ad2aaa49da0506aed0c PLoS ONE, Vol 12, Iss 5, p e0177467 (2017) Medicine R Science Q article 2017 ftdoajarticles https://doi.org/10.1371/journal.pone.0177467 2022-12-31T03:29:24Z Density-dependent (DD) and density-independent (DI) habitat selection is strongly linked to a species' evolutionary history. Determining the relative importance of each is necessary because declining populations are not always the result of altered DI mechanisms but can often be the result of DD via a reduced carrying capacity. We developed spatially and temporally explicit models throughout the Chena River, Alaska to predict important DI mechanisms that influence Chinook salmon spawning success. We used resource-selection functions to predict suitable spawning habitat based on geomorphic characteristics, a semi-distributed water-and-energy balance hydrologic model to generate stream flow metrics, and modeled stream temperature as a function of climatic variables. Spawner counts were predicted throughout the core and periphery spawning sections of the Chena River from escapement estimates (DD) and DI variables. Additionally, we used isodar analysis to identify whether spawners actively defend spawning habitat or follow an ideal free distribution along the riverscape. Aerial counts were best explained by escapement and reference to the core or periphery, while no models with DI variables were supported in the candidate set. Furthermore, isodar plots indicated habitat selection was best explained by ideal free distributions, although there was strong evidence for active defense of core spawning habitat. Our results are surprising, given salmon commonly defend spawning resources, and are likely due to competition occurring at finer spatial scales than addressed in this study. Article in Journal/Newspaper Arctic Alaska Directory of Open Access Journals: DOAJ Articles Arctic PLOS ONE 12 5 e0177467 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Brock M Huntsman Jeffrey A Falke James W Savereide Katrina E Bennett The role of density-dependent and -independent processes in spawning habitat selection by salmon in an Arctic riverscape. |
topic_facet |
Medicine R Science Q |
description |
Density-dependent (DD) and density-independent (DI) habitat selection is strongly linked to a species' evolutionary history. Determining the relative importance of each is necessary because declining populations are not always the result of altered DI mechanisms but can often be the result of DD via a reduced carrying capacity. We developed spatially and temporally explicit models throughout the Chena River, Alaska to predict important DI mechanisms that influence Chinook salmon spawning success. We used resource-selection functions to predict suitable spawning habitat based on geomorphic characteristics, a semi-distributed water-and-energy balance hydrologic model to generate stream flow metrics, and modeled stream temperature as a function of climatic variables. Spawner counts were predicted throughout the core and periphery spawning sections of the Chena River from escapement estimates (DD) and DI variables. Additionally, we used isodar analysis to identify whether spawners actively defend spawning habitat or follow an ideal free distribution along the riverscape. Aerial counts were best explained by escapement and reference to the core or periphery, while no models with DI variables were supported in the candidate set. Furthermore, isodar plots indicated habitat selection was best explained by ideal free distributions, although there was strong evidence for active defense of core spawning habitat. Our results are surprising, given salmon commonly defend spawning resources, and are likely due to competition occurring at finer spatial scales than addressed in this study. |
format |
Article in Journal/Newspaper |
author |
Brock M Huntsman Jeffrey A Falke James W Savereide Katrina E Bennett |
author_facet |
Brock M Huntsman Jeffrey A Falke James W Savereide Katrina E Bennett |
author_sort |
Brock M Huntsman |
title |
The role of density-dependent and -independent processes in spawning habitat selection by salmon in an Arctic riverscape. |
title_short |
The role of density-dependent and -independent processes in spawning habitat selection by salmon in an Arctic riverscape. |
title_full |
The role of density-dependent and -independent processes in spawning habitat selection by salmon in an Arctic riverscape. |
title_fullStr |
The role of density-dependent and -independent processes in spawning habitat selection by salmon in an Arctic riverscape. |
title_full_unstemmed |
The role of density-dependent and -independent processes in spawning habitat selection by salmon in an Arctic riverscape. |
title_sort |
role of density-dependent and -independent processes in spawning habitat selection by salmon in an arctic riverscape. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2017 |
url |
https://doi.org/10.1371/journal.pone.0177467 https://doaj.org/article/045cbc3d33694ad2aaa49da0506aed0c |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Alaska |
genre_facet |
Arctic Alaska |
op_source |
PLoS ONE, Vol 12, Iss 5, p e0177467 (2017) |
op_relation |
http://europepmc.org/articles/PMC5439693?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0177467 https://doaj.org/article/045cbc3d33694ad2aaa49da0506aed0c |
op_doi |
https://doi.org/10.1371/journal.pone.0177467 |
container_title |
PLOS ONE |
container_volume |
12 |
container_issue |
5 |
container_start_page |
e0177467 |
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1766341328219668480 |