Introduction of Mysis relicta (Mysida) reduces niche segregation between deep-water Arctic charr morphs
This is a post-peer-review, pre-copyedit version of an article published in Hydrobiologia . The final authenticated version is available online at https://doi.org/10.1007/s10750-019-3953-4 . Niche diversification of polymorphic Arctic charr can be altered by multiple anthropogenic stressors. The opo...
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Online Access: | https://hdl.handle.net/10037/17378 https://doi.org/10.1007/s10750-019-3953-4 |
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ftunivtroemsoe:oai:munin.uit.no:10037/17378 2023-05-15T14:30:02+02:00 Introduction of Mysis relicta (Mysida) reduces niche segregation between deep-water Arctic charr morphs Knudsen, Rune Eloranta, Antti Siwertsson, Anna Paterson, Rachel A. Power, Michael Sandlund, Odd Terje 2019-04-26 https://hdl.handle.net/10037/17378 https://doi.org/10.1007/s10750-019-3953-4 eng eng Springer Nature Hydrobiologia info:eu-repo/grantAgreement/EC/H2020/663830/EU/Strengthening International Research Capacity in Wales/SIRCIW/ http://hdl.handle.net/11250/2596607 FRIDAID 1694450 doi:10.1007/s10750-019-3953-4 0018-8158 1573-5117 https://hdl.handle.net/10037/17378 openAccess Copyright Springer Nature Switzerland AG 2019 VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480 Journal article Tidsskriftartikkel Peer reviewed acceptedVersion 2019 ftunivtroemsoe https://doi.org/10.1007/s10750-019-3953-4 2021-06-25T17:57:03Z This is a post-peer-review, pre-copyedit version of an article published in Hydrobiologia . The final authenticated version is available online at https://doi.org/10.1007/s10750-019-3953-4 . Niche diversification of polymorphic Arctic charr can be altered by multiple anthropogenic stressors. The opossum-shrimp ( Mysis relicta ) was introduced to compensate for reduced food resources for fish following hydropower operations in Lake Limingen, central Norway. Based on habitat use, stomach contents, stable isotopes (δ 13 C, δ 15 N) and trophically transmitted parasites, the zooplanktivorous upper water-column dwelling ‘normal’ morph was clearly trophically separated from two sympatric deep-water morphs (the ‘dwarf’ and the ‘grey’) that became more abundant with depth (> 30 m). Mysis dominated (50–60%) charr diets in deeper waters (> 30 m), irrespective of morph. Mysis and/or zooplankton prey groups caused high dietary overlap (> 54%) between the ‘dwarf’ morph and the two other ‘normal’ and ‘grey’ morphs. After excluding Mysis , the dietary overlap dropped to 34% between the two profundal morphs, as the ‘dwarf’ fed largely on deep-water zoobenthos (39%), while the ‘grey’ morph fed on fish (59%). The time-integrated trophic niche tracers (trophically transmitted parasites and stable isotopes) demonstrated only partial dietary segregation between the two deep-water morphs. The high importance of Mysis in Arctic charr diets may have reduced the ancestral niche segregation between the deep-water morphs and thereby increased their resource competition and potential risk of hybridization. Article in Journal/Newspaper Arctic charr Arctic Zooplankton University of Tromsø: Munin Open Research Archive Arctic Limingen ENVELOPE(13.746,13.746,64.706,64.706) Norway Hydrobiologia 840 1 245 260 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480 |
spellingShingle |
VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480 Knudsen, Rune Eloranta, Antti Siwertsson, Anna Paterson, Rachel A. Power, Michael Sandlund, Odd Terje Introduction of Mysis relicta (Mysida) reduces niche segregation between deep-water Arctic charr morphs |
topic_facet |
VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480 |
description |
This is a post-peer-review, pre-copyedit version of an article published in Hydrobiologia . The final authenticated version is available online at https://doi.org/10.1007/s10750-019-3953-4 . Niche diversification of polymorphic Arctic charr can be altered by multiple anthropogenic stressors. The opossum-shrimp ( Mysis relicta ) was introduced to compensate for reduced food resources for fish following hydropower operations in Lake Limingen, central Norway. Based on habitat use, stomach contents, stable isotopes (δ 13 C, δ 15 N) and trophically transmitted parasites, the zooplanktivorous upper water-column dwelling ‘normal’ morph was clearly trophically separated from two sympatric deep-water morphs (the ‘dwarf’ and the ‘grey’) that became more abundant with depth (> 30 m). Mysis dominated (50–60%) charr diets in deeper waters (> 30 m), irrespective of morph. Mysis and/or zooplankton prey groups caused high dietary overlap (> 54%) between the ‘dwarf’ morph and the two other ‘normal’ and ‘grey’ morphs. After excluding Mysis , the dietary overlap dropped to 34% between the two profundal morphs, as the ‘dwarf’ fed largely on deep-water zoobenthos (39%), while the ‘grey’ morph fed on fish (59%). The time-integrated trophic niche tracers (trophically transmitted parasites and stable isotopes) demonstrated only partial dietary segregation between the two deep-water morphs. The high importance of Mysis in Arctic charr diets may have reduced the ancestral niche segregation between the deep-water morphs and thereby increased their resource competition and potential risk of hybridization. |
format |
Article in Journal/Newspaper |
author |
Knudsen, Rune Eloranta, Antti Siwertsson, Anna Paterson, Rachel A. Power, Michael Sandlund, Odd Terje |
author_facet |
Knudsen, Rune Eloranta, Antti Siwertsson, Anna Paterson, Rachel A. Power, Michael Sandlund, Odd Terje |
author_sort |
Knudsen, Rune |
title |
Introduction of Mysis relicta (Mysida) reduces niche segregation between deep-water Arctic charr morphs |
title_short |
Introduction of Mysis relicta (Mysida) reduces niche segregation between deep-water Arctic charr morphs |
title_full |
Introduction of Mysis relicta (Mysida) reduces niche segregation between deep-water Arctic charr morphs |
title_fullStr |
Introduction of Mysis relicta (Mysida) reduces niche segregation between deep-water Arctic charr morphs |
title_full_unstemmed |
Introduction of Mysis relicta (Mysida) reduces niche segregation between deep-water Arctic charr morphs |
title_sort |
introduction of mysis relicta (mysida) reduces niche segregation between deep-water arctic charr morphs |
publisher |
Springer Nature |
publishDate |
2019 |
url |
https://hdl.handle.net/10037/17378 https://doi.org/10.1007/s10750-019-3953-4 |
long_lat |
ENVELOPE(13.746,13.746,64.706,64.706) |
geographic |
Arctic Limingen Norway |
geographic_facet |
Arctic Limingen Norway |
genre |
Arctic charr Arctic Zooplankton |
genre_facet |
Arctic charr Arctic Zooplankton |
op_relation |
Hydrobiologia info:eu-repo/grantAgreement/EC/H2020/663830/EU/Strengthening International Research Capacity in Wales/SIRCIW/ http://hdl.handle.net/11250/2596607 FRIDAID 1694450 doi:10.1007/s10750-019-3953-4 0018-8158 1573-5117 https://hdl.handle.net/10037/17378 |
op_rights |
openAccess Copyright Springer Nature Switzerland AG 2019 |
op_doi |
https://doi.org/10.1007/s10750-019-3953-4 |
container_title |
Hydrobiologia |
container_volume |
840 |
container_issue |
1 |
container_start_page |
245 |
op_container_end_page |
260 |
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1766303957885386752 |