From top to bottom: Do Lake Trout diversify along a depth gradient in Great Bear Lake, NT, Canada?
Depth is usually considered the main driver of Lake Trout intraspecific diversity across lakes in North America. Given that Great Bear Lake is one of the largest and deepest freshwater systems in North America, we predicted that Lake Trout intraspecific diversity to be organized along a depth axis w...
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ftdoajarticles:oai:doaj.org/article:4a0ee4fa4d7e4a529bdfceaec66a7af7 2023-05-15T16:22:57+02:00 From top to bottom: Do Lake Trout diversify along a depth gradient in Great Bear Lake, NT, Canada? Louise Chavarie Kimberly L Howland Les N Harris Michael J Hansen William J Harford Colin P Gallagher Shauna M Baillie Brendan Malley William M Tonn Andrew M Muir Charles C Krueger 2018-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0193925 https://doaj.org/article/4a0ee4fa4d7e4a529bdfceaec66a7af7 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC5863968?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0193925 https://doaj.org/article/4a0ee4fa4d7e4a529bdfceaec66a7af7 PLoS ONE, Vol 13, Iss 3, p e0193925 (2018) Medicine R Science Q article 2018 ftdoajarticles https://doi.org/10.1371/journal.pone.0193925 2022-12-31T03:46:13Z Depth is usually considered the main driver of Lake Trout intraspecific diversity across lakes in North America. Given that Great Bear Lake is one of the largest and deepest freshwater systems in North America, we predicted that Lake Trout intraspecific diversity to be organized along a depth axis within this system. Thus, we investigated whether a deep-water morph of Lake Trout co-existed with four shallow-water morphs previously described in Great Bear Lake. Morphology, neutral genetic variation, isotopic niches, and life-history traits of Lake Trout across depths (0-150 m) were compared among morphs. Due to the propensity of Lake Trout with high levels of morphological diversity to occupy multiple habitat niches, a novel multivariate grouping method using a suite of composite variables was applied in addition to two other commonly used grouping methods to classify individuals. Depth alone did not explain Lake Trout diversity in Great Bear Lake; a distinct fifth deep-water morph was not found. Rather, Lake Trout diversity followed an ecological continuum, with some evidence for adaptation to local conditions in deep-water habitat. Overall, trout caught from deep-water showed low levels of genetic and phenotypic differentiation from shallow-water trout, and displayed higher lipid content (C:N ratio) and occupied a higher trophic level that suggested an potential increase of piscivory (including cannibalism) than the previously described four morphs. Why phenotypic divergence between shallow- and deep-water Lake Trout was low is unknown, especially when the potential for phenotypic variation should be high in deep and large Great Bear Lake. Given that variation in complexity of freshwater environments has dramatic consequences for divergence, variation in the complexity in Great Bear Lake (i.e., shallow being more complex than deep), may explain the observed dichotomy in the expression of intraspecific phenotypic diversity between shallow- vs. deep-water habitats. The ambiguity surrounding mechanisms driving ... Article in Journal/Newspaper Great Bear Lake Directory of Open Access Journals: DOAJ Articles Canada Deep Water Lake ENVELOPE(-134.436,-134.436,67.400,67.400) Great Bear Lake ENVELOPE(-120.753,-120.753,65.834,65.834) PLOS ONE 13 3 e0193925 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Louise Chavarie Kimberly L Howland Les N Harris Michael J Hansen William J Harford Colin P Gallagher Shauna M Baillie Brendan Malley William M Tonn Andrew M Muir Charles C Krueger From top to bottom: Do Lake Trout diversify along a depth gradient in Great Bear Lake, NT, Canada? |
topic_facet |
Medicine R Science Q |
description |
Depth is usually considered the main driver of Lake Trout intraspecific diversity across lakes in North America. Given that Great Bear Lake is one of the largest and deepest freshwater systems in North America, we predicted that Lake Trout intraspecific diversity to be organized along a depth axis within this system. Thus, we investigated whether a deep-water morph of Lake Trout co-existed with four shallow-water morphs previously described in Great Bear Lake. Morphology, neutral genetic variation, isotopic niches, and life-history traits of Lake Trout across depths (0-150 m) were compared among morphs. Due to the propensity of Lake Trout with high levels of morphological diversity to occupy multiple habitat niches, a novel multivariate grouping method using a suite of composite variables was applied in addition to two other commonly used grouping methods to classify individuals. Depth alone did not explain Lake Trout diversity in Great Bear Lake; a distinct fifth deep-water morph was not found. Rather, Lake Trout diversity followed an ecological continuum, with some evidence for adaptation to local conditions in deep-water habitat. Overall, trout caught from deep-water showed low levels of genetic and phenotypic differentiation from shallow-water trout, and displayed higher lipid content (C:N ratio) and occupied a higher trophic level that suggested an potential increase of piscivory (including cannibalism) than the previously described four morphs. Why phenotypic divergence between shallow- and deep-water Lake Trout was low is unknown, especially when the potential for phenotypic variation should be high in deep and large Great Bear Lake. Given that variation in complexity of freshwater environments has dramatic consequences for divergence, variation in the complexity in Great Bear Lake (i.e., shallow being more complex than deep), may explain the observed dichotomy in the expression of intraspecific phenotypic diversity between shallow- vs. deep-water habitats. The ambiguity surrounding mechanisms driving ... |
format |
Article in Journal/Newspaper |
author |
Louise Chavarie Kimberly L Howland Les N Harris Michael J Hansen William J Harford Colin P Gallagher Shauna M Baillie Brendan Malley William M Tonn Andrew M Muir Charles C Krueger |
author_facet |
Louise Chavarie Kimberly L Howland Les N Harris Michael J Hansen William J Harford Colin P Gallagher Shauna M Baillie Brendan Malley William M Tonn Andrew M Muir Charles C Krueger |
author_sort |
Louise Chavarie |
title |
From top to bottom: Do Lake Trout diversify along a depth gradient in Great Bear Lake, NT, Canada? |
title_short |
From top to bottom: Do Lake Trout diversify along a depth gradient in Great Bear Lake, NT, Canada? |
title_full |
From top to bottom: Do Lake Trout diversify along a depth gradient in Great Bear Lake, NT, Canada? |
title_fullStr |
From top to bottom: Do Lake Trout diversify along a depth gradient in Great Bear Lake, NT, Canada? |
title_full_unstemmed |
From top to bottom: Do Lake Trout diversify along a depth gradient in Great Bear Lake, NT, Canada? |
title_sort |
from top to bottom: do lake trout diversify along a depth gradient in great bear lake, nt, canada? |
publisher |
Public Library of Science (PLoS) |
publishDate |
2018 |
url |
https://doi.org/10.1371/journal.pone.0193925 https://doaj.org/article/4a0ee4fa4d7e4a529bdfceaec66a7af7 |
long_lat |
ENVELOPE(-134.436,-134.436,67.400,67.400) ENVELOPE(-120.753,-120.753,65.834,65.834) |
geographic |
Canada Deep Water Lake Great Bear Lake |
geographic_facet |
Canada Deep Water Lake Great Bear Lake |
genre |
Great Bear Lake |
genre_facet |
Great Bear Lake |
op_source |
PLoS ONE, Vol 13, Iss 3, p e0193925 (2018) |
op_relation |
http://europepmc.org/articles/PMC5863968?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0193925 https://doaj.org/article/4a0ee4fa4d7e4a529bdfceaec66a7af7 |
op_doi |
https://doi.org/10.1371/journal.pone.0193925 |
container_title |
PLOS ONE |
container_volume |
13 |
container_issue |
3 |
container_start_page |
e0193925 |
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