The phylogeography of westslope cutthroat trout

Young, Michael K.; McKelvey, Kevin S.; Jennings, Tara; Carter, Katie; Cronn, Richard; Keeley, Ernest R.; Loxterman, Janet L.; Pilgrim, Kristine L.; Schwartz, Michael K.

doi:10.1101/213363

Cited by 8 publications

(8 citation statements)

References 88 publications

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“…We hypothesize that the formation and draining of postglacial lakes including Missoula did not majorly impact P. tremuloides population structure due to the wind‐dispersed nature and peculiar life‐history strategy of this species (e.g., clonal stands throughout many western areas of the species range). Given the evidence of an important effect of Missoula floods on cold‐tolerant freshwater fishes and mammals (e.g., Miller, Bellinger, Forsman, & Haig, 2006; Young et al, 2017, refs. therein), we suggest that aquatic plants or rodent‐dispersed tree species may be more likely to exhibit the genomic signatures of such events, and thus might be more fruitful targets for future studies of outburst flooding effects on regional plant communities.…”

Section: Discussionmentioning

confidence: 99%

Genotyping‐by‐sequencing and ecological niche modeling illuminate phylogeography, admixture, and Pleistocene range dynamics in quaking aspen (Populus tremuloides)

Bagley

Heming

Gutiérrez

et al. 2020

Ecology and Evolution

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Populus tremuloides is the widest‐ranging tree species in North America and an ecologically important component of mesic forest ecosystems displaced by the Pleistocene glaciations. Using phylogeographic analyses of genome‐wide SNPs (34,796 SNPs, 183 individuals) and ecological niche modeling, we inferred population structure, ploidy levels, admixture, and Pleistocene range dynamics of P. tremuloides, and tested several historical biogeographical hypotheses. We found three genetic lineages located mainly in coastal–Cascades (cluster 1), east‐slope Cascades–Sierra Nevadas–Northern Rockies (cluster 2), and U.S. Rocky Mountains through southern Canadian (cluster 3) regions of the P. tremuloides range, with tree graph relationships of the form ((cluster 1, cluster 2), cluster 3). Populations consisted mainly of diploids (86%) but also small numbers of triploids (12%) and tetraploids (1%), and ploidy did not adversely affect our genetic inferences. The main vector of admixture was from cluster 3 into cluster 2, with the admixture zone trending northwest through the Rocky Mountains along a recognized phenotypic cline (Utah to Idaho). Clusters 1 and 2 provided strong support for the “stable‐edge hypothesis” that unglaciated southwestern populations persisted in situ since the last glaciation. By contrast, despite a lack of clinal genetic variation, cluster 3 exhibited “trailing‐edge” dynamics from niche suitability predictions signifying complete northward postglacial expansion. Results were also consistent with the “inland dispersal hypothesis” predicting postglacial assembly of Pacific Northwestern forest ecosystems, but rejected the hypothesis that Pacific‐coastal populations were colonized during outburst flooding from glacial Lake Missoula. Overall, congruent patterns between our phylogeographic and ecological niche modeling results and fossil pollen data demonstrate complex mixtures of stable‐edge, refugial locations, and postglacial expansion within P. tremuloides. These findings confirm and refine previous genetic studies, while strongly supporting a distinct Pacific‐coastal genetic lineage of quaking aspen.

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Section: Discussionmentioning

confidence: 99%

Genotyping‐by‐sequencing and ecological niche modeling illuminate phylogeography, admixture, and Pleistocene range dynamics in quaking aspen (Populus tremuloides)

Bagley

Heming

Gutiérrez

et al. 2020

Ecology and Evolution

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“…Although the U.S. Fish and Wildlife Service considers WCT a single conservation unit (U.S. Federal Register 2003), molecular studies provide support for delineating additional conservation segments (Drinan et al 2011; Young et al 2018).…”

Section: Future Threats To Wct Persistencementioning

confidence: 99%

“…Idaho supports six of the nine WCT lineages (Coeur d’Alene; St. Joe; North Fork Clearwater; Salmon; Clearwater headwaters; and Clearwater–eastern Cascades; Young et al 2018). Idaho’s Snake River populations display more genetic variation than WCT in other parts of their U.S. range, potentially because the drainage served as a refugium during the latest Pleistocene glaciations (Drinan et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Resurrecting an Idaho Icon: How Research and Management Reversed Declines of Native Westslope Cutthroat Trout

Mallet

Thurow

2021

Fisheries

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Westslope Cutthroat Trout Oncorhynchus clarkii lewisi (WCT), the dominant nonanadromous salmonid in central and northern Idaho, historically were extremely abundant and widely distributed. Despite restricted harvest methods and limits since 1899, many WCT populations declined and by the 1960s, populations in several major drainages were on the brink of collapse. In response, fisheries biologists began investigating WCT population dynamics, life histories, and habitat requirements and developed evidence‐based regulations and habitat restoration alternatives. Here we describe fluvial WCT case histories that illustrate how research and management collaborated to rebuild populations. The sustained and successful effort to restore fluvial WCT in Idaho offers insights to assist WCT recovery efforts elsewhere. Today, populations in many watersheds have been rehabilitated and WCT currently inhabit about 80% of their historical stream range. Despite continued threats, many Idaho WCT populations are relatively secure, provide unique recreational opportunities, and remain an important ecological, cultural, and economic resource.

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“…Idaho supports six of the nine WCT lineages (Coeur d'Alene; St. Joe; North Fork Clearwater; Salmon; Clearwater headwaters; and Clearwater-eastern Cascades; Young et al 2018 ). Idaho's Snake River populations display more genetic variation than WCT in other parts of their U.S. range, potentially because the drainage served as a refugium during the latest Pleistocene glaciations (Drinan et al 2011 ).…”

Section: Introductionmentioning

confidence: 99%

“…Although the U.S. Fish and Wildlife Service considers WCT a single conservation unit (U.S. Federal Register 2003 ), molecular studies provide support for delineating additional conservation segments (Drinan et al 2011 ;Young et al 2018 ).…”

Section: Genetic Introgressionmentioning

confidence: 99%

Fisheries Volume 47 Number 3 March 2022

2022

Fisheries

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The phylogeography of westslope cutthroat trout

Cited by 8 publications

References 88 publications

Genotyping‐by‐sequencing and ecological niche modeling illuminate phylogeography, admixture, and Pleistocene range dynamics in quaking aspen (Populus tremuloides)

Genotyping‐by‐sequencing and ecological niche modeling illuminate phylogeography, admixture, and Pleistocene range dynamics in quaking aspen (Populus tremuloides)

Resurrecting an Idaho Icon: How Research and Management Reversed Declines of Native Westslope Cutthroat Trout

Fisheries Volume 47 Number 3 March 2022

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