Introduced European smelt (Osmerus eperlanus) affects food web and fish community in a large Norwegian lake
Embargo until 06 August 2019. 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, Storsjøe...
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ftnorskinstvf:oai:niva.brage.unit.no:11250/2602238 2024-09-15T17:52:23+00:00 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 application/pdf http://hdl.handle.net/11250/2602238 https://doi.org/10.1007/s10530-018-1806-0 eng eng Springer Norges forskningsråd: 243910 Biological Invasions. 2018, 21 (1), 85–98. urn:issn:1387-3547 http://hdl.handle.net/11250/2602238 https://doi.org/10.1007/s10530-018-1806-0 cristin:1600075 Biological Invasions Journal article Peer reviewed 2018 ftnorskinstvf https://doi.org/10.1007/s10530-018-1806-0 2024-07-09T03:14:36Z Embargo until 06 August 2019. 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 Article in Journal/Newspaper Arctic charr Salvelinus alpinus Norwegian Institute for Water research: NIVA Open Access Archive (Brage) Biological Invasions 21 1 85 98 |
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Open Polar |
collection |
Norwegian Institute for Water research: NIVA Open Access Archive (Brage) |
op_collection_id |
ftnorskinstvf |
language |
English |
description |
Embargo until 06 August 2019. 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 |
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 |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2602238 https://doi.org/10.1007/s10530-018-1806-0 |
genre |
Arctic charr Salvelinus alpinus |
genre_facet |
Arctic charr Salvelinus alpinus |
op_source |
Biological Invasions |
op_relation |
Norges forskningsråd: 243910 Biological Invasions. 2018, 21 (1), 85–98. urn:issn:1387-3547 http://hdl.handle.net/11250/2602238 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_ |
1810294430902517760 |