Piscivore Diet Shifts and Trophic Level Change after Alewife Establishment in Lake Champlain
Abstract Invasions and deliberate introductions of new prey species are likely to affect the prey choice and trophic level of resident predators. Rainbow Smelt Osmerus mordax and Alewife Alosa pseudoharengus are common prey fish species in lakes throughout North America, either as native or nonnativ...
Published in: | Transactions of the American Fisheries Society |
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crwiley:10.1002/tafs.10080 2024-06-02T08:03:41+00:00 Piscivore Diet Shifts and Trophic Level Change after Alewife Establishment in Lake Champlain Simonin, Paul W. Rudstam, Lars G. Parrish, Donna L. Pientka, Bernard Sullivan, Patrick J. Lake Champlain Sea Grant, University of Vermont U.S. Geological Survey University of Vermont 2018 http://dx.doi.org/10.1002/tafs.10080 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Ftafs.10080 https://onlinelibrary.wiley.com/doi/pdf/10.1002/tafs.10080 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/tafs.10080 https://afspubs.onlinelibrary.wiley.com/doi/am-pdf/10.1002/tafs.10080 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1002/tafs.10080 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor Transactions of the American Fisheries Society volume 147, issue 5, page 939-947 ISSN 0002-8487 1548-8659 journal-article 2018 crwiley https://doi.org/10.1002/tafs.10080 2024-05-03T11:01:38Z Abstract Invasions and deliberate introductions of new prey species are likely to affect the prey choice and trophic level of resident predators. Rainbow Smelt Osmerus mordax and Alewife Alosa pseudoharengus are common prey fish species in lakes throughout North America, either as native or nonnative species. The establishment of Alewives in the 2000s in a lake with a native Rainbow Smelt population (Lake Champlain) presented an opportunity to study changes in the diet and trophic level of fish already established in the system. Using stable isotope analysis, we found that Alewives became a major component of predator diets, in particular of the diets of Atlantic Salmon Salmo salar and Walleye Sander vitreus . Lake Trout Salvelinus namaycush consumed relatively few Alewives. For Walleyes (the predator with both pre‐ and post‐Alewife isotope ratios available), the δ 15 N values decreased significantly from the pre‐Alewife period of the late 1990s, indicating that Walleyes feed at lower trophic levels when Alewives are present. Predation on Alewives was correlated with the amount of spatial overlap of predators and prey. Our results show that the introduction of Alewives has altered the predator–prey linkages in Lake Champlain, alterations that can have major effects on food web structure and trophic cascades. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Transactions of the American Fisheries Society 147 5 939 947 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Invasions and deliberate introductions of new prey species are likely to affect the prey choice and trophic level of resident predators. Rainbow Smelt Osmerus mordax and Alewife Alosa pseudoharengus are common prey fish species in lakes throughout North America, either as native or nonnative species. The establishment of Alewives in the 2000s in a lake with a native Rainbow Smelt population (Lake Champlain) presented an opportunity to study changes in the diet and trophic level of fish already established in the system. Using stable isotope analysis, we found that Alewives became a major component of predator diets, in particular of the diets of Atlantic Salmon Salmo salar and Walleye Sander vitreus . Lake Trout Salvelinus namaycush consumed relatively few Alewives. For Walleyes (the predator with both pre‐ and post‐Alewife isotope ratios available), the δ 15 N values decreased significantly from the pre‐Alewife period of the late 1990s, indicating that Walleyes feed at lower trophic levels when Alewives are present. Predation on Alewives was correlated with the amount of spatial overlap of predators and prey. Our results show that the introduction of Alewives has altered the predator–prey linkages in Lake Champlain, alterations that can have major effects on food web structure and trophic cascades. |
author2 |
Lake Champlain Sea Grant, University of Vermont U.S. Geological Survey University of Vermont |
format |
Article in Journal/Newspaper |
author |
Simonin, Paul W. Rudstam, Lars G. Parrish, Donna L. Pientka, Bernard Sullivan, Patrick J. |
spellingShingle |
Simonin, Paul W. Rudstam, Lars G. Parrish, Donna L. Pientka, Bernard Sullivan, Patrick J. Piscivore Diet Shifts and Trophic Level Change after Alewife Establishment in Lake Champlain |
author_facet |
Simonin, Paul W. Rudstam, Lars G. Parrish, Donna L. Pientka, Bernard Sullivan, Patrick J. |
author_sort |
Simonin, Paul W. |
title |
Piscivore Diet Shifts and Trophic Level Change after Alewife Establishment in Lake Champlain |
title_short |
Piscivore Diet Shifts and Trophic Level Change after Alewife Establishment in Lake Champlain |
title_full |
Piscivore Diet Shifts and Trophic Level Change after Alewife Establishment in Lake Champlain |
title_fullStr |
Piscivore Diet Shifts and Trophic Level Change after Alewife Establishment in Lake Champlain |
title_full_unstemmed |
Piscivore Diet Shifts and Trophic Level Change after Alewife Establishment in Lake Champlain |
title_sort |
piscivore diet shifts and trophic level change after alewife establishment in lake champlain |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/tafs.10080 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Ftafs.10080 https://onlinelibrary.wiley.com/doi/pdf/10.1002/tafs.10080 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/tafs.10080 https://afspubs.onlinelibrary.wiley.com/doi/am-pdf/10.1002/tafs.10080 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1002/tafs.10080 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Transactions of the American Fisheries Society volume 147, issue 5, page 939-947 ISSN 0002-8487 1548-8659 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/tafs.10080 |
container_title |
Transactions of the American Fisheries Society |
container_volume |
147 |
container_issue |
5 |
container_start_page |
939 |
op_container_end_page |
947 |
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1800748273098555392 |