Introduced European smelt (Osmerus eperlanus) affects food web and fish community in a large Norwegian lake
Invasive and introduced fishes can affect recipient ecosystems and native species via altered competitive and predatory interactions, potentially leading to top-down and bottom-up cascading impacts. Here, we describe a case from a large lake in southern Norway, Storsjøen, where the illegal introduct...
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2560553 2023-05-15T14:30:08+02:00 Introduced European smelt (Osmerus eperlanus) affects food web and fish community in a large Norwegian lake Eloranta, Antti Johnsen, Stein Ivar Power, Michael Bærum, Kim Magnus Sandlund, Odd Terje Finstad, Anders Gravbrøt Rognerud, Sigurd Museth, Jon 2018 http://hdl.handle.net/11250/2560553 https://doi.org/10.1007/s10530-018-1806-0 eng eng Springer Verlag Norges forskningsråd: 243910 urn:issn:1387-3547 http://hdl.handle.net/11250/2560553 https://doi.org/10.1007/s10530-018-1806-0 cristin:1600075 Biological Invasions Journal article Peer reviewed 2018 ftntnutrondheimi https://doi.org/10.1007/s10530-018-1806-0 2019-09-17T06:54:06Z Invasive and introduced fishes can affect recipient ecosystems and native species via altered competitive and predatory interactions, potentially leading to top-down and bottom-up cascading impacts. Here, we describe a case from a large lake in southern Norway, Storsjøen, where the illegal introduction of a small, predominantly planktivorous fish species, European smelt (Osmerus eperlanus), has led to changes in the native fish community and lake food web. Survey fishing data collected before (2007) and after (2016) the introduction indicates that smelt has become the numerically dominant fish species both in benthic and pelagic habitats, with concurrent reductions in the relative abundance of native European whitefish (Coregonus lavaretus) and Arctic charr (Salvelinus alpinus) populations. Stable isotope (δ13C and δ15N) data indicate minor changes in the trophic niches of native whitefish and Arctic charr despite partly overlapping niches with the introduced smelt. In contrast, brown trout (Salmo trutta) showed an earlier shift to piscivory, a more pelagic niche and increased growth rate, likely because of the smelt induced increase in pelagic prey fish abundance. The main trophic pathway supporting top predators (i.e., large brown trout) in Storsjøen has, therefore, shifted from a littoral to a more pelagic base. Our study demonstrates that small-sized introduced fishes can alter lake food-web dynamics, with contrasting impacts on native fishes. This knowledge is vital for future evaluation and mitigation of potential impacts of smelt introductions on lake ecosystems. acceptedVersion This is a post-peer-review, pre-copyedit version of an article published in [Biological Invasions] Locked until 6.8.2019 due to copyright restrictions. The final authenticated version is available online at: https://doi.org/10.1007/s10530-018-1806-0 Article in Journal/Newspaper Arctic charr Arctic Salvelinus alpinus NTNU Open Archive (Norwegian University of Science and Technology) Arctic Norway Biological Invasions 21 1 85 98 |
institution |
Open Polar |
collection |
NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
description |
Invasive and introduced fishes can affect recipient ecosystems and native species via altered competitive and predatory interactions, potentially leading to top-down and bottom-up cascading impacts. Here, we describe a case from a large lake in southern Norway, Storsjøen, where the illegal introduction of a small, predominantly planktivorous fish species, European smelt (Osmerus eperlanus), has led to changes in the native fish community and lake food web. Survey fishing data collected before (2007) and after (2016) the introduction indicates that smelt has become the numerically dominant fish species both in benthic and pelagic habitats, with concurrent reductions in the relative abundance of native European whitefish (Coregonus lavaretus) and Arctic charr (Salvelinus alpinus) populations. Stable isotope (δ13C and δ15N) data indicate minor changes in the trophic niches of native whitefish and Arctic charr despite partly overlapping niches with the introduced smelt. In contrast, brown trout (Salmo trutta) showed an earlier shift to piscivory, a more pelagic niche and increased growth rate, likely because of the smelt induced increase in pelagic prey fish abundance. The main trophic pathway supporting top predators (i.e., large brown trout) in Storsjøen has, therefore, shifted from a littoral to a more pelagic base. Our study demonstrates that small-sized introduced fishes can alter lake food-web dynamics, with contrasting impacts on native fishes. This knowledge is vital for future evaluation and mitigation of potential impacts of smelt introductions on lake ecosystems. acceptedVersion This is a post-peer-review, pre-copyedit version of an article published in [Biological Invasions] Locked until 6.8.2019 due to copyright restrictions. The final authenticated version is available online at: https://doi.org/10.1007/s10530-018-1806-0 |
format |
Article in Journal/Newspaper |
author |
Eloranta, Antti Johnsen, Stein Ivar Power, Michael Bærum, Kim Magnus Sandlund, Odd Terje Finstad, Anders Gravbrøt Rognerud, Sigurd Museth, Jon |
spellingShingle |
Eloranta, Antti Johnsen, Stein Ivar Power, Michael Bærum, Kim Magnus Sandlund, Odd Terje Finstad, Anders Gravbrøt Rognerud, Sigurd Museth, Jon Introduced European smelt (Osmerus eperlanus) affects food web and fish community in a large Norwegian lake |
author_facet |
Eloranta, Antti Johnsen, Stein Ivar Power, Michael Bærum, Kim Magnus Sandlund, Odd Terje Finstad, Anders Gravbrøt Rognerud, Sigurd Museth, Jon |
author_sort |
Eloranta, Antti |
title |
Introduced European smelt (Osmerus eperlanus) affects food web and fish community in a large Norwegian lake |
title_short |
Introduced European smelt (Osmerus eperlanus) affects food web and fish community in a large Norwegian lake |
title_full |
Introduced European smelt (Osmerus eperlanus) affects food web and fish community in a large Norwegian lake |
title_fullStr |
Introduced European smelt (Osmerus eperlanus) affects food web and fish community in a large Norwegian lake |
title_full_unstemmed |
Introduced European smelt (Osmerus eperlanus) affects food web and fish community in a large Norwegian lake |
title_sort |
introduced european smelt (osmerus eperlanus) affects food web and fish community in a large norwegian lake |
publisher |
Springer Verlag |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2560553 https://doi.org/10.1007/s10530-018-1806-0 |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Salvelinus alpinus |
op_source |
Biological Invasions |
op_relation |
Norges forskningsråd: 243910 urn:issn:1387-3547 http://hdl.handle.net/11250/2560553 https://doi.org/10.1007/s10530-018-1806-0 cristin:1600075 |
op_doi |
https://doi.org/10.1007/s10530-018-1806-0 |
container_title |
Biological Invasions |
container_volume |
21 |
container_issue |
1 |
container_start_page |
85 |
op_container_end_page |
98 |
_version_ |
1766304036311531520 |