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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Online Access: | https://lup.lub.lu.se/record/2409813 https://doi.org/10.1007/s10641-011-9914-z |
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ftulundlup:oai:lup.lub.lu.se:18c0b680-abac-4d32-a5a0-b8e4e64609d0 2023-05-15T14:30:12+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 L. Amsinck, Susanne L. Bjerring, Rikke Sondergaard, Martin Johansson, Liselotte S. Christoffersen, Kirsten S. Jeppesen, Erik 2012 https://lup.lub.lu.se/record/2409813 https://doi.org/10.1007/s10641-011-9914-z eng eng Springer https://lup.lub.lu.se/record/2409813 http://dx.doi.org/10.1007/s10641-011-9914-z wos:000299768600001 scopus:84856239094 Environmental Biology of Fishes; 93(3), pp 305-318 (2012) ISSN: 0378-1909 Ecology Niche complexity Stable isotopes Trout Stickleback Aquatic ecology Faroe Islands contributiontojournal/article info:eu-repo/semantics/article text 2012 ftulundlup https://doi.org/10.1007/s10641-011-9914-z 2023-02-01T23:35:29Z 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 Faroe Islands Salvelinus alpinus Lund University Publications (LUP) Arctic Faroe Islands Environmental Biology of Fishes 93 3 305 318 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Ecology Niche complexity Stable isotopes Trout Stickleback Aquatic ecology Faroe Islands |
spellingShingle |
Ecology Niche complexity Stable isotopes Trout Stickleback Aquatic ecology Faroe Islands Brodersen, Jakob Malmquist, Hilmar J. Landkildehus, Frank Lauridsen, Torben L. Amsinck, Susanne L. Bjerring, Rikke Sondergaard, Martin Johansson, Liselotte S. Christoffersen, Kirsten S. Jeppesen, Erik Short-and long term niche segregation and individual specialization of brown trout (Salmo trutta) in species poor Faroese lakes |
topic_facet |
Ecology Niche complexity Stable isotopes Trout Stickleback Aquatic ecology Faroe Islands |
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 L. Amsinck, Susanne L. Bjerring, Rikke Sondergaard, Martin Johansson, Liselotte S. Christoffersen, Kirsten S. Jeppesen, Erik |
author_facet |
Brodersen, Jakob Malmquist, Hilmar J. Landkildehus, Frank Lauridsen, Torben L. Amsinck, Susanne L. Bjerring, Rikke Sondergaard, Martin Johansson, Liselotte S. Christoffersen, Kirsten S. 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 |
publisher |
Springer |
publishDate |
2012 |
url |
https://lup.lub.lu.se/record/2409813 https://doi.org/10.1007/s10641-011-9914-z |
geographic |
Arctic Faroe Islands |
geographic_facet |
Arctic Faroe Islands |
genre |
Arctic charr Arctic Faroe Islands Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Faroe Islands Salvelinus alpinus |
op_source |
Environmental Biology of Fishes; 93(3), pp 305-318 (2012) ISSN: 0378-1909 |
op_relation |
https://lup.lub.lu.se/record/2409813 http://dx.doi.org/10.1007/s10641-011-9914-z wos:000299768600001 scopus:84856239094 |
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 |
_version_ |
1766304089724944384 |