Niche differentiation among small mammals of the Alexander Archipelago in southeastern Alaska
We compared isotopic niche widths of small mammals that co-occur across the Alexander Archipelago and adjacent mainland in southeastern Alaska to test the prediction that dietary niche widths will be greater for individuals living in communities with fewer potential competitors and predators. We qua...
Published in: | Journal of Mammalogy |
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American Society of Mammalogists
2017
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Online Access: | https://doi.org/10.1093/jmammal/gyx141 |
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ftbioone:10.1093/jmammal/gyx141 2024-06-02T07:58:50+00:00 Niche differentiation among small mammals of the Alexander Archipelago in southeastern Alaska Shannon L. O'Brien Joseph A. Cook Seth D. Newsome Shannon L. O'Brien Joseph A. Cook Seth D. Newsome world 2017-11-19 text/HTML https://doi.org/10.1093/jmammal/gyx141 en eng American Society of Mammalogists doi:10.1093/jmammal/gyx141 All rights reserved. https://doi.org/10.1093/jmammal/gyx141 Text 2017 ftbioone https://doi.org/10.1093/jmammal/gyx141 2024-05-07T00:55:29Z We compared isotopic niche widths of small mammals that co-occur across the Alexander Archipelago and adjacent mainland in southeastern Alaska to test the prediction that dietary niche widths will be greater for individuals living in communities with fewer potential competitors and predators. We quantified the carbon (δ13C) and nitrogen (δ15N) isotopic niche widths of 2 insectivorous shrews (Sorex cinereus and S. monticola), 3 primarily herbivorous rodents (Microtus longicaudus, M. oeconomus, and M. pennsylvanicus), and 1 omnivorous rodent (Peromyscus keeni) and combined these data with information provided by natural history accounts. We sampled islands that varied with respect to size and species richness to compare with localities on the adjacent mainland, where species richness is greatest. Consistent with our predictions, isotopic niche widths were significantly greater on islands relative to mainland localities. Our findings can help guide management strategies within this archipelago through increased understanding of how key community-level interactions vary across localities within this complex landscape. Text Archipelago Alaska BioOne Online Journals Journal of Mammalogy 99 1 108 116 |
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BioOne Online Journals |
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ftbioone |
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English |
description |
We compared isotopic niche widths of small mammals that co-occur across the Alexander Archipelago and adjacent mainland in southeastern Alaska to test the prediction that dietary niche widths will be greater for individuals living in communities with fewer potential competitors and predators. We quantified the carbon (δ13C) and nitrogen (δ15N) isotopic niche widths of 2 insectivorous shrews (Sorex cinereus and S. monticola), 3 primarily herbivorous rodents (Microtus longicaudus, M. oeconomus, and M. pennsylvanicus), and 1 omnivorous rodent (Peromyscus keeni) and combined these data with information provided by natural history accounts. We sampled islands that varied with respect to size and species richness to compare with localities on the adjacent mainland, where species richness is greatest. Consistent with our predictions, isotopic niche widths were significantly greater on islands relative to mainland localities. Our findings can help guide management strategies within this archipelago through increased understanding of how key community-level interactions vary across localities within this complex landscape. |
author2 |
Shannon L. O'Brien Joseph A. Cook Seth D. Newsome |
format |
Text |
author |
Shannon L. O'Brien Joseph A. Cook Seth D. Newsome |
spellingShingle |
Shannon L. O'Brien Joseph A. Cook Seth D. Newsome Niche differentiation among small mammals of the Alexander Archipelago in southeastern Alaska |
author_facet |
Shannon L. O'Brien Joseph A. Cook Seth D. Newsome |
author_sort |
Shannon L. O'Brien |
title |
Niche differentiation among small mammals of the Alexander Archipelago in southeastern Alaska |
title_short |
Niche differentiation among small mammals of the Alexander Archipelago in southeastern Alaska |
title_full |
Niche differentiation among small mammals of the Alexander Archipelago in southeastern Alaska |
title_fullStr |
Niche differentiation among small mammals of the Alexander Archipelago in southeastern Alaska |
title_full_unstemmed |
Niche differentiation among small mammals of the Alexander Archipelago in southeastern Alaska |
title_sort |
niche differentiation among small mammals of the alexander archipelago in southeastern alaska |
publisher |
American Society of Mammalogists |
publishDate |
2017 |
url |
https://doi.org/10.1093/jmammal/gyx141 |
op_coverage |
world |
genre |
Archipelago Alaska |
genre_facet |
Archipelago Alaska |
op_source |
https://doi.org/10.1093/jmammal/gyx141 |
op_relation |
doi:10.1093/jmammal/gyx141 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1093/jmammal/gyx141 |
container_title |
Journal of Mammalogy |
container_volume |
99 |
container_issue |
1 |
container_start_page |
108 |
op_container_end_page |
116 |
_version_ |
1800742399501139968 |