Short-and long term niche segregation and individual specialization of brown trout (Salmo trutta) in species poor Faroese lakes
Trophic niche divergence is considered to be a major process by which species coexistence is facilitated. When studying niche segregation in lake ecosystems, we tend to view the niche on a one-dimensional pelagic-littoral axis. In reality, however, the niche use may be more complex and individual fi...
Published in: | Environmental Biology of Fishes |
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2012
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Online Access: | https://curis.ku.dk/portal/da/publications/shortand-long-term-niche-segregation-and-individual-specialization-of-brown-trout-salmo-trutta-in-species-poor-faroese-lakes(9adb6ca4-93fc-48b0-9ce6-c21e7f44b5ff).html https://doi.org/10.1007/s10641-011-9914-z |
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ftcopenhagenunip:oai:pure.atira.dk:publications/9adb6ca4-93fc-48b0-9ce6-c21e7f44b5ff 2023-05-15T14:30:11+02:00 Short-and long term niche segregation and individual specialization of brown trout (Salmo trutta) in species poor Faroese lakes Brodersen, Jakob Malmquist, Hilmar J. Landkildehus, Frank Lauridsen, Torben Linding Amsinck, Susanne Lildal Hansen, Rikke Bjerring Søndergaard, Martin Johansson, Liselotte Sander Christoffersen, Kirsten Seestern Jeppesen, Erik 2012 https://curis.ku.dk/portal/da/publications/shortand-long-term-niche-segregation-and-individual-specialization-of-brown-trout-salmo-trutta-in-species-poor-faroese-lakes(9adb6ca4-93fc-48b0-9ce6-c21e7f44b5ff).html https://doi.org/10.1007/s10641-011-9914-z eng eng info:eu-repo/semantics/closedAccess Brodersen , J , Malmquist , H J , Landkildehus , F , Lauridsen , T L , Amsinck , S L , Hansen , R B , Søndergaard , M , Johansson , L S , Christoffersen , K S & Jeppesen , E 2012 , ' Short-and long term niche segregation and individual specialization of brown trout (Salmo trutta) in species poor Faroese lakes ' , Environmental Biology of Fishes , vol. 93 , no. 3 , pp. 305-318 . https://doi.org/10.1007/s10641-011-9914-z article 2012 ftcopenhagenunip https://doi.org/10.1007/s10641-011-9914-z 2022-04-27T22:50:17Z Trophic niche divergence is considered to be a major process by which species coexistence is facilitated. When studying niche segregation in lake ecosystems, we tend to view the niche on a one-dimensional pelagic-littoral axis. In reality, however, the niche use may be more complex and individual fidelity to a niche may be variable both between and within populations. In order to study this complexity, relative simple systems with few species are needed. In this paper, we study how competitor presence affects the resource use of brown trout (Salmo trutta) in 11 species-poor Faroese lakes by comparing relative abundance, stable isotope ratios and diet in multiple habitats. In the presence of three-spined sticklebacks (Gasterosteus aculeatus), a higher proportion of the trout population was found in the pelagic habitat, and trout in general relied on a more pelagic diet base as compared to trout living in allopatry or in sympatry with Arctic charr (Salvelinus alpinus). Diet analyses revealed, however, that niche-segregation may be more complex than described on a one-dimensional pelagic-littoral axis. Trout from both littoral and offshore benthic habitats had in the presence of sticklebacks a less benthic diet as compared to trout living in allopatry or in sympatry with charr. Furthermore, we found individual habitat specialization between littoral/benthic and pelagic trout in deep lakes. Hence, our findings indicate that for trout populations interspecific competition can drive shifts in both habitat and niche use, but at the same time they illustrate the complexity of the ecological niche in freshwater ecosystems. Article in Journal/Newspaper Arctic charr Arctic Salvelinus alpinus University of Copenhagen: Research Arctic Environmental Biology of Fishes 93 3 305 318 |
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Open Polar |
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University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Trophic niche divergence is considered to be a major process by which species coexistence is facilitated. When studying niche segregation in lake ecosystems, we tend to view the niche on a one-dimensional pelagic-littoral axis. In reality, however, the niche use may be more complex and individual fidelity to a niche may be variable both between and within populations. In order to study this complexity, relative simple systems with few species are needed. In this paper, we study how competitor presence affects the resource use of brown trout (Salmo trutta) in 11 species-poor Faroese lakes by comparing relative abundance, stable isotope ratios and diet in multiple habitats. In the presence of three-spined sticklebacks (Gasterosteus aculeatus), a higher proportion of the trout population was found in the pelagic habitat, and trout in general relied on a more pelagic diet base as compared to trout living in allopatry or in sympatry with Arctic charr (Salvelinus alpinus). Diet analyses revealed, however, that niche-segregation may be more complex than described on a one-dimensional pelagic-littoral axis. Trout from both littoral and offshore benthic habitats had in the presence of sticklebacks a less benthic diet as compared to trout living in allopatry or in sympatry with charr. Furthermore, we found individual habitat specialization between littoral/benthic and pelagic trout in deep lakes. Hence, our findings indicate that for trout populations interspecific competition can drive shifts in both habitat and niche use, but at the same time they illustrate the complexity of the ecological niche in freshwater ecosystems. |
format |
Article in Journal/Newspaper |
author |
Brodersen, Jakob Malmquist, Hilmar J. Landkildehus, Frank Lauridsen, Torben Linding Amsinck, Susanne Lildal Hansen, Rikke Bjerring Søndergaard, Martin Johansson, Liselotte Sander Christoffersen, Kirsten Seestern Jeppesen, Erik |
spellingShingle |
Brodersen, Jakob Malmquist, Hilmar J. Landkildehus, Frank Lauridsen, Torben Linding Amsinck, Susanne Lildal Hansen, Rikke Bjerring Søndergaard, Martin Johansson, Liselotte Sander Christoffersen, Kirsten Seestern Jeppesen, Erik Short-and long term niche segregation and individual specialization of brown trout (Salmo trutta) in species poor Faroese lakes |
author_facet |
Brodersen, Jakob Malmquist, Hilmar J. Landkildehus, Frank Lauridsen, Torben Linding Amsinck, Susanne Lildal Hansen, Rikke Bjerring Søndergaard, Martin Johansson, Liselotte Sander Christoffersen, Kirsten Seestern Jeppesen, Erik |
author_sort |
Brodersen, Jakob |
title |
Short-and long term niche segregation and individual specialization of brown trout (Salmo trutta) in species poor Faroese lakes |
title_short |
Short-and long term niche segregation and individual specialization of brown trout (Salmo trutta) in species poor Faroese lakes |
title_full |
Short-and long term niche segregation and individual specialization of brown trout (Salmo trutta) in species poor Faroese lakes |
title_fullStr |
Short-and long term niche segregation and individual specialization of brown trout (Salmo trutta) in species poor Faroese lakes |
title_full_unstemmed |
Short-and long term niche segregation and individual specialization of brown trout (Salmo trutta) in species poor Faroese lakes |
title_sort |
short-and long term niche segregation and individual specialization of brown trout (salmo trutta) in species poor faroese lakes |
publishDate |
2012 |
url |
https://curis.ku.dk/portal/da/publications/shortand-long-term-niche-segregation-and-individual-specialization-of-brown-trout-salmo-trutta-in-species-poor-faroese-lakes(9adb6ca4-93fc-48b0-9ce6-c21e7f44b5ff).html https://doi.org/10.1007/s10641-011-9914-z |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Salvelinus alpinus |
op_source |
Brodersen , J , Malmquist , H J , Landkildehus , F , Lauridsen , T L , Amsinck , S L , Hansen , R B , Søndergaard , M , Johansson , L S , Christoffersen , K S & Jeppesen , E 2012 , ' Short-and long term niche segregation and individual specialization of brown trout (Salmo trutta) in species poor Faroese lakes ' , Environmental Biology of Fishes , vol. 93 , no. 3 , pp. 305-318 . https://doi.org/10.1007/s10641-011-9914-z |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1007/s10641-011-9914-z |
container_title |
Environmental Biology of Fishes |
container_volume |
93 |
container_issue |
3 |
container_start_page |
305 |
op_container_end_page |
318 |
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1766304082893471744 |