Trophic niche overlap and abundance reveal potential impact of interspecific interactions on a reintroduced fish1
Conceptually, trophic niche overlap and species abundance can describe the strength and number of interspecific trophic interactions to determine the competitive impact on reintroduced species or other ecosystem changes. We use an example with young-of-year (YOY) Atlantic salmon (Salmo salar) reintr...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | https://scholar.uwindsor.ca/glierpub/276 https://doi.org/10.1139/cjfas-2020-0204 |
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ftunivwindsor:oai:scholar.uwindsor.ca:glierpub-1278 2023-06-11T04:10:13+02:00 Trophic niche overlap and abundance reveal potential impact of interspecific interactions on a reintroduced fish1 Larocque, Sarah M. Johnson, Timothy B. Fisk, Aaron T. 2021-01-01T08:00:00Z https://scholar.uwindsor.ca/glierpub/276 https://doi.org/10.1139/cjfas-2020-0204 unknown Scholarship at UWindsor https://scholar.uwindsor.ca/glierpub/276 doi:10.1139/cjfas-2020-0204 https://doi.org/10.1139/cjfas-2020-0204 Great Lakes Institute for Environmental Research Publications text 2021 ftunivwindsor https://doi.org/10.1139/cjfas-2020-0204 2023-05-06T19:10:44Z Conceptually, trophic niche overlap and species abundance can describe the strength and number of interspecific trophic interactions to determine the competitive impact on reintroduced species or other ecosystem changes. We use an example with young-of-year (YOY) Atlantic salmon (Salmo salar) reintroductions to determine whether trophic niche overlaps and abundances limit restoration success. Using seasonal stable isotopes and abundance estimates for invertivorous fishes in three Lake Ontario tributaries, we assessed community isotopic structure, trophic niche overlap, and the impact of the niche overlap by incorporating relative abundance. Brown trout (Salmo trutta) YOY could be a strong competitor with a high trophic niche overlap with Atlantic salmon YOY, but at lower abundances relative to Atlantic salmon there is minimal impact. Stream resident fish communities appeared to partition resources across seasons such that abundant species had low trophic niche overlap to minimize overall competition with Atlantic salmon YOY given available resources, indicating niche complementarity. Through joint consideration of trophic overlap and abundance using our conceptual model, the competitive impact of community composition on a reintroduced species could be assessed. Text Atlantic salmon Salmo salar University of Windsor, Ontario: Scholarship at UWindsor Canadian Journal of Fisheries and Aquatic Sciences 78 6 765 774 |
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Open Polar |
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University of Windsor, Ontario: Scholarship at UWindsor |
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ftunivwindsor |
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Conceptually, trophic niche overlap and species abundance can describe the strength and number of interspecific trophic interactions to determine the competitive impact on reintroduced species or other ecosystem changes. We use an example with young-of-year (YOY) Atlantic salmon (Salmo salar) reintroductions to determine whether trophic niche overlaps and abundances limit restoration success. Using seasonal stable isotopes and abundance estimates for invertivorous fishes in three Lake Ontario tributaries, we assessed community isotopic structure, trophic niche overlap, and the impact of the niche overlap by incorporating relative abundance. Brown trout (Salmo trutta) YOY could be a strong competitor with a high trophic niche overlap with Atlantic salmon YOY, but at lower abundances relative to Atlantic salmon there is minimal impact. Stream resident fish communities appeared to partition resources across seasons such that abundant species had low trophic niche overlap to minimize overall competition with Atlantic salmon YOY given available resources, indicating niche complementarity. Through joint consideration of trophic overlap and abundance using our conceptual model, the competitive impact of community composition on a reintroduced species could be assessed. |
format |
Text |
author |
Larocque, Sarah M. Johnson, Timothy B. Fisk, Aaron T. |
spellingShingle |
Larocque, Sarah M. Johnson, Timothy B. Fisk, Aaron T. Trophic niche overlap and abundance reveal potential impact of interspecific interactions on a reintroduced fish1 |
author_facet |
Larocque, Sarah M. Johnson, Timothy B. Fisk, Aaron T. |
author_sort |
Larocque, Sarah M. |
title |
Trophic niche overlap and abundance reveal potential impact of interspecific interactions on a reintroduced fish1 |
title_short |
Trophic niche overlap and abundance reveal potential impact of interspecific interactions on a reintroduced fish1 |
title_full |
Trophic niche overlap and abundance reveal potential impact of interspecific interactions on a reintroduced fish1 |
title_fullStr |
Trophic niche overlap and abundance reveal potential impact of interspecific interactions on a reintroduced fish1 |
title_full_unstemmed |
Trophic niche overlap and abundance reveal potential impact of interspecific interactions on a reintroduced fish1 |
title_sort |
trophic niche overlap and abundance reveal potential impact of interspecific interactions on a reintroduced fish1 |
publisher |
Scholarship at UWindsor |
publishDate |
2021 |
url |
https://scholar.uwindsor.ca/glierpub/276 https://doi.org/10.1139/cjfas-2020-0204 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Great Lakes Institute for Environmental Research Publications |
op_relation |
https://scholar.uwindsor.ca/glierpub/276 doi:10.1139/cjfas-2020-0204 https://doi.org/10.1139/cjfas-2020-0204 |
op_doi |
https://doi.org/10.1139/cjfas-2020-0204 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
78 |
container_issue |
6 |
container_start_page |
765 |
op_container_end_page |
774 |
_version_ |
1768384493727514624 |