Ecological outcomes of hybridization vary extensively in Catostomus fishes

Elizabeth G. Mandeville; Robert O. Hall; C. Alex Buerkle

doi:10.1111/evo.14624

Ecological outcomes of hybridization vary extensively in Catostomus fishes

Elizabeth G. Mandeville
, Robert O. Hall
, C. Alex Buerkle

Flathead Lake Biological Station

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Hybridization outcomes vary geographically and can depend on the environment. Hybridization can also reshape biotic interactions, leading to ecological shifts. If hybrids function differently ecologically in ways that enhance or reduce fitness, and those ecological roles vary geographically, ecological factors might explain variation in hybridization outcomes. However, relatively few studies have focused on ecological traits of hybrids. We compared the feeding ecology of Catostomus fish species and hybrids by using stable isotopes (δ¹³C and δ¹⁵N) as a proxy for diet and habitat use, and compared two native species, an introduced species, and three interspecific hybrid crosses. We included hybrids and parental species from seven rivers where hybridization outcomes vary. Relative isotopic niches of native species varied geographically, but native species did not fully overlap in isotopic space in any river sampled, suggesting little overlap of resource use between historically sympatric species. The introduced species overlapped with one or both native species in every river, suggesting similar resource use and potential competition. Hybrids occupied intermediate, matching, or more transgressive isotopic niches, and varied within and among rivers. Ecological outcomes of hybridization varied across locations, implying that hybridization might have unpredictable, idiosyncratic ecological effects.

Original language	English
Pages (from-to)	2697-2711
Number of pages	15
Journal	Evolution
Volume	76
Issue number	11
DOIs	https://doi.org/10.1111/evo.14624
State	Published - Nov 2022

Funding

Isotope analysis was funded by the Biodiversity Institute at the University of Wyoming (Biodiversity Research Grant to EGM). Genomic data were generated with funding through the Wyoming Game and Fish Department (State Wildlife Grant #001793 and Bureau of Land Management Cooperative Agreement 12AC20048) and Colorado Parks and Wildlife (Species Conservation Trust Fund project SCTF001C). E.G.M. was supported in part by NIH INBRE funding to the University of Wyoming (NCRR P20RR016474/NIGMS P20GM103432) and by the UW Biodiversity Institute. Computing was accomplished with an allocation from from the University of Wyoming's Advanced Research Computing Center, on its Mount Moran IBM System X cluster (http://n2t.net/ark:/85786/m4159c) and Teton Intel x86_64 cluster (https://doi.org/10.15786/M2FY47) and through a RRG Allocation on Compute Canada's Graham cluster to E.G. Mandeville. The authors thank the Wyoming Game and Fish Department and Colorado Parks and Wildlife for providing samples and supporting our work on Catostomus hybridization, most notably Mark Smith, Kevin Gelwicks, Bobby Compton, and Kevin Thompson. The authors also thank the staff of the Stable Isotope Facility at the University of Wyoming, especially Chandelle MacDonald, for their assistance and expert advice. The authors thank Kevin Bestgen, Kevin Gelwicks, Kevin Thompson, Zachary Hooley-Underwood, and Gwen Harris for permission to use the photos in Fig. 1. This manuscript was improved by comments from the Walters lab at the University of Wyoming, the Mandeville lab at the University of Guelph, and feedback from anonymous reviewers. Isotope analysis was funded by the Biodiversity Institute at the University of Wyoming (Biodiversity Research Grant to EGM). Genomic data were generated with funding through the Wyoming Game and Fish Department (State Wildlife Grant #001793 and Bureau of Land Management Cooperative Agreement 12AC20048) and Colorado Parks and Wildlife (Species Conservation Trust Fund project SCTF001C). E.G.M. was supported in part by NIH INBRE funding to the University of Wyoming (NCRR P20RR016474/NIGMS P20GM103432) and by the UW Biodiversity Institute. Computing was accomplished with an allocation from from the University of Wyoming's Advanced Research Computing Center, on its Mount Moran IBM System X cluster ( http://n2t.net/ark:/85786/m4159c ) and Teton Intel x86_64 cluster ( https://doi.org/10.15786/M2FY47 ) and through a RRG Allocation on Compute Canada's Graham cluster to E.G. Mandeville. The authors thank the Wyoming Game and Fish Department and Colorado Parks and Wildlife for providing samples and supporting our work on hybridization, most notably Mark Smith, Kevin Gelwicks, Bobby Compton, and Kevin Thompson. The authors also thank the staff of the Stable Isotope Facility at the University of Wyoming, especially Chandelle MacDonald, for their assistance and expert advice. The authors thank Kevin Bestgen, Kevin Gelwicks, Kevin Thompson, Zachary Hooley‐Underwood, and Gwen Harris for permission to use the photos in Fig. 1 . This manuscript was improved by comments from the Walters lab at the University of Wyoming, the Mandeville lab at the University of Guelph, and feedback from anonymous reviewers. Catostomus

Funders	Funder number
Bureau of Land Management	12AC20048
SCTF001C
Wyoming Fish and Game Department	001793
P20RR016474
University of Wyoming
Colorado Parks and Wildlife

Keywords

Hybridization
ecological interactions
fitness
stable isotopes

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10.1111/evo.14624

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title = "Ecological outcomes of hybridization vary extensively in Catostomus fishes",

abstract = "Hybridization outcomes vary geographically and can depend on the environment. Hybridization can also reshape biotic interactions, leading to ecological shifts. If hybrids function differently ecologically in ways that enhance or reduce fitness, and those ecological roles vary geographically, ecological factors might explain variation in hybridization outcomes. However, relatively few studies have focused on ecological traits of hybrids. We compared the feeding ecology of Catostomus fish species and hybrids by using stable isotopes (δ13C and δ15N) as a proxy for diet and habitat use, and compared two native species, an introduced species, and three interspecific hybrid crosses. We included hybrids and parental species from seven rivers where hybridization outcomes vary. Relative isotopic niches of native species varied geographically, but native species did not fully overlap in isotopic space in any river sampled, suggesting little overlap of resource use between historically sympatric species. The introduced species overlapped with one or both native species in every river, suggesting similar resource use and potential competition. Hybrids occupied intermediate, matching, or more transgressive isotopic niches, and varied within and among rivers. Ecological outcomes of hybridization varied across locations, implying that hybridization might have unpredictable, idiosyncratic ecological effects.",

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author = "Mandeville, \{Elizabeth G.\} and Hall, \{Robert O.\} and Buerkle, \{C. Alex\}",

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N2 - Hybridization outcomes vary geographically and can depend on the environment. Hybridization can also reshape biotic interactions, leading to ecological shifts. If hybrids function differently ecologically in ways that enhance or reduce fitness, and those ecological roles vary geographically, ecological factors might explain variation in hybridization outcomes. However, relatively few studies have focused on ecological traits of hybrids. We compared the feeding ecology of Catostomus fish species and hybrids by using stable isotopes (δ13C and δ15N) as a proxy for diet and habitat use, and compared two native species, an introduced species, and three interspecific hybrid crosses. We included hybrids and parental species from seven rivers where hybridization outcomes vary. Relative isotopic niches of native species varied geographically, but native species did not fully overlap in isotopic space in any river sampled, suggesting little overlap of resource use between historically sympatric species. The introduced species overlapped with one or both native species in every river, suggesting similar resource use and potential competition. Hybrids occupied intermediate, matching, or more transgressive isotopic niches, and varied within and among rivers. Ecological outcomes of hybridization varied across locations, implying that hybridization might have unpredictable, idiosyncratic ecological effects.

AB - Hybridization outcomes vary geographically and can depend on the environment. Hybridization can also reshape biotic interactions, leading to ecological shifts. If hybrids function differently ecologically in ways that enhance or reduce fitness, and those ecological roles vary geographically, ecological factors might explain variation in hybridization outcomes. However, relatively few studies have focused on ecological traits of hybrids. We compared the feeding ecology of Catostomus fish species and hybrids by using stable isotopes (δ13C and δ15N) as a proxy for diet and habitat use, and compared two native species, an introduced species, and three interspecific hybrid crosses. We included hybrids and parental species from seven rivers where hybridization outcomes vary. Relative isotopic niches of native species varied geographically, but native species did not fully overlap in isotopic space in any river sampled, suggesting little overlap of resource use between historically sympatric species. The introduced species overlapped with one or both native species in every river, suggesting similar resource use and potential competition. Hybrids occupied intermediate, matching, or more transgressive isotopic niches, and varied within and among rivers. Ecological outcomes of hybridization varied across locations, implying that hybridization might have unpredictable, idiosyncratic ecological effects.

KW - Hybridization

KW - ecological interactions

KW - fitness

KW - stable isotopes

UR - https://www.scopus.com/pages/publications/85138748566

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SP - 2697

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JO - Evolution

JF - Evolution

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ER -

Ecological outcomes of hybridization vary extensively in Catostomus fishes

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