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 DD via...
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ftpubmed:oai:pubmedcentral.nih.gov:5439693 2023-05-15T15:09:55+02:00 The role of density-dependent and –independent processes in spawning habitat selection by salmon in an Arctic riverscape Huntsman, Brock M. Falke, Jeffrey A. Savereide, James W. Bennett, Katrina E. 2017-05-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5439693/ http://www.ncbi.nlm.nih.gov/pubmed/28531202 https://doi.org/10.1371/journal.pone.0177467 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5439693/ http://www.ncbi.nlm.nih.gov/pubmed/28531202 http://dx.doi.org/10.1371/journal.pone.0177467 https://creativecommons.org/publicdomain/zero/1.0/ This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 (https://creativecommons.org/publicdomain/zero/1.0/) public domain dedication. CC0 PDM Research Article Text 2017 ftpubmed https://doi.org/10.1371/journal.pone.0177467 2017-06-11T00:02:17Z 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. Text Arctic Alaska PubMed Central (PMC) Arctic PLOS ONE 12 5 e0177467 |
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Research Article Huntsman, Brock M. Falke, Jeffrey A. Savereide, James W. Bennett, Katrina E. The role of density-dependent and –independent processes in spawning habitat selection by salmon in an Arctic riverscape |
topic_facet |
Research Article |
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 |
Text |
author |
Huntsman, Brock M. Falke, Jeffrey A. Savereide, James W. Bennett, Katrina E. |
author_facet |
Huntsman, Brock M. Falke, Jeffrey A. Savereide, James W. Bennett, Katrina E. |
author_sort |
Huntsman, Brock M. |
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 |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5439693/ http://www.ncbi.nlm.nih.gov/pubmed/28531202 https://doi.org/10.1371/journal.pone.0177467 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Alaska |
genre_facet |
Arctic Alaska |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5439693/ http://www.ncbi.nlm.nih.gov/pubmed/28531202 http://dx.doi.org/10.1371/journal.pone.0177467 |
op_rights |
https://creativecommons.org/publicdomain/zero/1.0/ This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 (https://creativecommons.org/publicdomain/zero/1.0/) public domain dedication. |
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https://doi.org/10.1371/journal.pone.0177467 |
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PLOS ONE |
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12 |
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5 |
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e0177467 |
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