Paleoecology

Wilson, Chris; Mandrak, Nicholas E.

doi:10.1007/978-3-030-62259-6_3

Cited by 6 publications

(2 citation statements)

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“…Outwash and the resulting turbidity were not discussed as potential impediments to fish passage in earlier North American research on proglacial lakes (e.g., Bailey and Smith 1981; Mandrak and Crossman 1992), but see Wilson and Mandrak (2021). Eshenroder and Jacobson (2020) proposed that owing to high turbidity and very cold water temperatures, the proglacial Great Lakes were challenging pathways for Cisco navigating these waters.…”

Section: Cisco Zoogeography and Ice Advancesmentioning

confidence: 99%

Reconciling zoogeography and genetics: Origins of deepwater Cisco Coregonus artedi (sensu lato) in the Great Lakes

Eshenroder,

Breckenridge,

Jacobson

2023

Trans Am Fish Soc

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ObjectiveWe propose that deepwater Cisco Coregonus artedi (sensu lato) survived Wisconsin ice advances through introgression with shallow‐water Cisco ~65 ka followed by expression of introgressed genomic fragments after the last retreat of ice from the Great Lakes ~15 ka.MethodsWe reviewed Wisconsin glaciation in relation to putative introgression within Cisco and employed a phylogeographic approach to substantiate locations of Cisco refugia and the implications for dispersal of Cisco ahead of the last advance of Wisconsin ice.ResultsWe showed that deepwater Cisco, in contrast to shallow‐water Cisco, were very unlikely to have survived glacial advances and that a massive introgression event between both types likely occurred as the first of two Wisconsin ice advances reached the Great Lakes ~65 ka.ConclusionThe most‐parsimonious explanation for the distribution of deepwater Cisco involves long‐ago introgression as a precursor to its divergence from shallow‐water Cisco following the final retreat of Wisconsin ice.

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Section: Cisco Zoogeography and Ice Advancesmentioning

confidence: 99%

Reconciling zoogeography and genetics: Origins of deepwater Cisco Coregonus artedi (sensu lato) in the Great Lakes

Eshenroder,

Breckenridge,

Jacobson

2023

Trans Am Fish Soc

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“…We sought to explore differential gene expression in lake trout ( Salvelinus namaycush ) to examine the molecular processes potentially underlying transgenerational responses to elevated temperatures. The lake trout is a long-lived, cold-adapted salmonid that is largely limited to cold, oligotrophic lakes in formerly glaciated regions of North America (Riley et al 2021; Wilson and Mandrak 2021) and is under significant threat from climate change (Casselman 2008; Guzzo and Blanchfield 2017). Being stenothermal, lake trout behaviourally thermoregulate by migrating to deeper, cooler water when lakes thermally stratify during the summer (Martin and Olver 1980; Guzzo and Blanchfield 2017).…”

Section: Introductionmentioning

confidence: 99%

Transcriptomic responses to within- and transgenerational environmental warming in a cold-adapted salmonid

Penney

Burness

Wilson

2022

Preprint

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Cold-adapted species are particularly threatened by climate change as rates of environmental warming outpace the ability of many populations adapt. Recent evidence suggest that transgenerational thermal plasticity may play a role in the response of cold-adapted organisms to long-term changes in temperature. Using RNA sequencing, we explored differential gene expression of lake trout (Salvelinus namaycush), a cold-adapted species, to examine the molecular processes that respond to elevated temperatures under conditions of within-generation (offspring) and transgenerational (parental) warm-acclimation. We hypothesized that genes associated with metabolism, growth and thermal stress/tolerance would be differentially expressed in juvenile lake trout offspring depending on their own acclimation temperature and that of their parents. We found enriched pathways for thermal stress, signaling processes, immune function, and transcription regulation, although the specific genes and direction of differential expression (up- or downregulation) depended on the combination of offspring and parental thermal rearing conditions. While parental warm-acclimation did have a transgenerational effect on gene expression in their offspring, within-generation warm-acclimation had a larger effect on differential expression, enriching more pathways. We provide evidence of the transgenerational response to warming at the transcriptional level in lake trout, which should be useful for future studies of transcriptomics and plasticity in these and other cold-adapted species.

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