Concordant patterns of morphological, stable isotope and genetic variation in a recent ecological radiation (Salmonidae: <i>Coregonus</i> spp.)

Bernal, Moisés A.; Yule, Daniel L.; Stott, Wendylee; Evrard, Lori M.; Dowling, Thomas E.; Krabbenhoft, Trevor J.

doi:10.1111/mec.16596

Cited by 6 publications

(2 citation statements)

References 127 publications

(187 reference statements)

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“…The burst of rapid diversi cation within the C. artedi species complex occurred within the last 80 thousand years, equating to ~ 13,000 generations, a rate that would be ranked among the fastest in shes estimated to-date. This is also supported by previous studies that have shown low levels of genetic divergence among these species (Ackiss et al, 2020;Bernal et al, 2022;Lachance, Ackiss, Larson, Vinson, & Stockwell, 2021). The rapid diversi cation of the C. artedi complex is comparable to the speed of radiation and genetic divergence found in cichlid species in the African Rift Lakes (Samonte et al, 2007).…”

Section: Rapid Diversi Cation Of Coregonussupporting

confidence: 85%

Origin of the Laurentian Great Lakes fish fauna through upward adaptive radiation cascade prior to the Last Glacial Maximum

Backenstose,

Macguigan,

Osborne

et al. 2023

Preprint

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The evolutionary histories of adaptive radiations can be marked by dramatic demographic fluctuations. However, the demographic histories of ecologically-linked co-diversifying lineages remains understudied. The Laurentian Great Lakes provide a unique system of two lineages that are dispersed across depth gradients with a predator-prey relationship. We show that the North American Coregonus species complex radiated rapidly prior to the Last Glacial Maximum (80–90 ka), a globally warm period, followed by rapid expansion in population size. Similar patterns of demographic expansion were observed in the predator species, Salvelinus namaycush, following a brief time lag, which we hypothesize to be driven by predator prey dynamics. Diversification of prey into deepwater created ecological opportunities for the predators, facilitating their demographic expansion through an upward adaptive radiation cascade. This study provides a new timeline and environmental context for the origin of the Laurentian Great Lakes fish fauna, and firmly establishes this system as drivers of ecological diversification and rapid speciation through cyclical glaciation.

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Section: Rapid Diversi Cation Of Coregonussupporting

confidence: 85%

Origin of the Laurentian Great Lakes fish fauna through upward adaptive radiation cascade prior to the Last Glacial Maximum

Backenstose,

Macguigan,

Osborne

et al. 2023

Preprint

Self Cite

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show abstract

“…In their study, like ours, TM outperformed GM in discriminating among Great Slave Lake ciscoes. Moreover, in studies of Coregonus morphology using only TM, discrimination among groups was successful enough to enable downstream analyses (Østbye et al 2005; Reid et al 2017; Bernal et al 2022).…”

Section: Discussionmentioning

confidence: 99%

Comparison of traditional and geometric morphometrics using Lake Huron ciscoes of the Coregonus artedi complex

et al. 2023

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Objective: Here we determine how traditional morphometrics (TM) compares with geometric morphometrics (GM) in discriminating among morphologies of four forms of ciscoes of the Coregonus artedi complex collected from Lake Huron.Methods: One of the forms comprised two groups of the same deepwater cisco separated by capture depth, whereas the other three forms were shallow-water ciscoes.Result: Our three groups of shallow-water ciscoes were better separated (3% vs. 19% overlap) in principle component analysis (PCA) with TM data than with GM data incorporating semilandmarks (evenly spaced nonhomologous landmarks used to bridge between widely separated homologous landmarks). Our two deepwater cisco groups, comprising a putatively single form collected from different depths, separated more in PCAs with GM data (33% overlap) than in PCAs with TM data (66% overlap), an anomaly caused by greater decompression of the swim bladder and deformation of the body wall in the group captured at greater depths. Separation of the two deepwater cisco groups captured at different depths was not affected by the removal of semilandmarks. Assignment of forms using canonical variate analysis accurately assigned 86% of individuals using TM data, 98% of individuals using GM data incorporating semilandmarks, and 100% of individuals using GM data without semilandmarks. However, we considered assignments from the same form of deepwater cisco into separate groups as misassignments resulting from different capture depths, which reduced the accuracy of assignments with GM data incorporating semilandmarks to 66%. Conclusion:Our study implies that TM will continue to have an important role in morphological discrimination within Coregonus and other fishes similarly shaped.

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Origin of the Laurentian Great Lakes fish fauna through upward adaptive radiation cascade prior to the Last Glacial Maximum

Backenstose,

MacGuigan,

Osborne

et al. 2024

Commun Biol

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The evolutionary histories of adaptive radiations can be marked by dramatic demographic fluctuations. However, the demographic histories of ecologically-linked co-diversifying lineages remain understudied. The Laurentian Great Lakes provide a unique system of two such radiations that are dispersed across depth gradients with a predator-prey relationship. We show that the North American Coregonus species complex (“ciscoes”) radiated rapidly prior to the Last Glacial Maximum (80–90 kya), a globally warm period, followed by rapid expansion in population size. Similar patterns of demographic expansion were observed in the predator species, Lake Charr (Salvelinus namaycush), following a brief time lag, which we hypothesize was driven by predator-prey dynamics. Diversification of prey into deep water created ecological opportunities for the predators, facilitating their demographic expansion, which is consistent with an upward adaptive radiation cascade. This study provides a new timeline and environmental context for the origin of the Laurentian Great Lakes fish fauna, and firmly establishes this system as drivers of ecological diversification and rapid speciation through cyclical glaciation.

show abstract

Concordant patterns of morphological, stable isotope and genetic variation in a recent ecological radiation (Salmonidae: Coregonus spp.)

Cited by 6 publications

References 127 publications

Origin of the Laurentian Great Lakes fish fauna through upward adaptive radiation cascade prior to the Last Glacial Maximum

Origin of the Laurentian Great Lakes fish fauna through upward adaptive radiation cascade prior to the Last Glacial Maximum

Comparison of traditional and geometric morphometrics using Lake Huron ciscoes of the Coregonus artedi complex

Origin of the Laurentian Great Lakes fish fauna through upward adaptive radiation cascade prior to the Last Glacial Maximum

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