Novel hybrid finds a peri-urban niche: Allen’s Hummingbirds in southern California

Godwin, Braden L.; LaCava, Melanie E. F.; Mendelsohn, Beth; Gagne, Roderick B.; Gustafson, Kyle D.; Stowell, Sierra M. Love; Engilis, Andrew; Tell, Lisa A.; Ernest, Holly B.

doi:10.1007/s10592-020-01303-4

Cited by 5 publications

(12 citation statements)

References 81 publications

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“…Migratory and nonmigratory Allen's Hummingbird form a zone of intergradation, with admixture detected from Santa Barbara to Los Angeles County (Godwin et al., 2020). To investigate the extent to which intergradation contributed to estimates of π, d XY , and Tajima's D on the mainland, we reran these analyses while including only nonmigratory Allen's Hummingbird individuals on the mainland as far as possible from the zone of intergradation reported by Godwin et al.…”

Section: Methodsmentioning

confidence: 99%

“…To investigate the extent to which intergradation contributed to estimates of π, d XY , and Tajima's D on the mainland, we reran these analyses while including only nonmigratory Allen's Hummingbird individuals on the mainland as far as possible from the zone of intergradation reported by Godwin et al. (2020), from Riverside and San Diego County. Estimates of π, d XY , and Tajima's D calculations were unaffected (Appendix –S6).…”

Section: Methodsmentioning

confidence: 99%

“…Recent work (Godwin et al., 2020) found no evidence of a founder effect on the mainland by nonmigratory Allen's Hummingbird, although this was based only on average nucleotide diversity ( π ) estimates. Further, Godwin et al.…”

Section: Introductionmentioning

confidence: 99%

“…Further, Godwin et al. (2020) reported elevated levels of nucleotide diversity on the southern California mainland. However, their main focus was to evaluate the genetic relationships between nonmigratory and migratory Allen's Hummingbird, and sampling of nonmigratory Allen's Hummingbird was restricted to the coast on the mainland and the southern Channel Islands and did not include the northern Channel Islands, where bird species such as the Loggerhead Shrike ( Lanius ludovicianus , Caballero & Ashley, 2011), Song Sparrow ( Melospiza melodia , Wilson et al., 2015), and Spotted Towhee ( Pipilo maculatus , Walsh, 2015) have exhibited high differentiation.…”

Section: Introductionmentioning

confidence: 99%

“…While Godwin et al. (2020) analyzed the broader patterns of gene flow and divergence across Allen's Hummingbird (both subspecies) and Battey (2020) included both subspecies of Allen's as well as Rufous ( S. rufus ) Hummingbird, the present study explicitly focuses on the island–mainland colonization dynamics of nonmigratory Allen's Hummingbird.…”

Section: Introductionmentioning

confidence: 99%

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The population genetics of nonmigratory Allen’s Hummingbird (Selasphorus sasin sedentarius) following a recent mainland colonization

Myers

Burns

Clark

et al. 2021

Ecology and Evolution

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Allen's Hummingbird comprises two subspecies, one migratory (Selasphorus sasin sasin) and one nonmigratory (S. s. sedentarius). The nonmigratory subspecies, previously endemic to the California Channel Islands, apparently colonized the California mainland on the Palos Verdes Peninsula some time before 1970 and now breeds throughout coastal southern California. We sequenced and compared populations of mainland nonmigratory Allen's Hummingbird to Channel Island populations from Santa Catalina, San Clemente, and Santa Cruz Island. We found no evidence of founder effects on the mainland population. Values of nucleotide diversity on the mainland were higher than on the Channel Islands. There were low levels of divergence between the Channel Islands and the mainland, and Santa Cruz Island was the most genetically distinct. Ecological niche models showed that rainfall and temperature variables on the Channel Islands are similar in the Los Angeles basin and predicted continued expansion of nonmigratory Allen's Hummingbird north along the coast and inland. We also reviewed previous genetic studies of vertebrate species found on the Channel Islands and mainland and showed that broad conclusions regarding island–mainland patterns remain elusive. Challenges include the idiosyncratic nature of colonization itself as well as the lack of a comprehensive approach that incorporates similar markers and sampling strategies across taxa, which, within the context of a comparative study of island–mainland relationships, may lead to inconsistent results.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The population genetics of nonmigratory Allen’s Hummingbird (Selasphorus sasin sedentarius) following a recent mainland colonization

Myers

Burns

Clark

et al. 2021

Ecology and Evolution

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Prevalence and diversity of haemosporidians in a migratory high-elevation hummingbird in North America

et al. 2022

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Sampling affects population genetic inference: A case study of the Allen’s (Selasphorus sasin) and rufous hummingbird (Selasphorus rufus)

Myers

Burns

Clark

et al. 2023

Journal of Heredity

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Gene flow can affect evolutionary inference when species are undersampled. Here, we evaluate the effects of gene flow and geographic sampling on demographic inference of two hummingbirds that hybridize, Allen's hummingbird (Selasphorus sasin) and rufous hummingbird (S. rufus). Using whole-genome data and extensive geographic sampling, we find widespread connectivity, with introgression far beyond the Allen's × rufous hybrid zone, although the Z chromosome resists introgression beyond the hybrid zone. We test alternative hypotheses of speciation history of Allen’s, rufous, and Calliope (S. calliope) hummingbird and find that rufous hummingbird is the sister taxon to Allen's hummingbird, and Calliope hummingbird is the outgroup. A model treating the two subspecies of Allen's hummingbird as a single panmictic population fit observed genetic data better than models treating the subspecies as distinct populations, in contrast to morphological and behavioral differences and analyses of spatial population structure. With additional sampling, our study builds upon recent studies that came to conflicting conclusions regarding the evolutionary histories of these two species. Our results stress the importance of thorough geographic sampling when assessing demographic history in the presence of gene flow.

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Novel hybrid finds a peri-urban niche: Allen’s Hummingbirds in southern California

Cited by 5 publications

References 81 publications

The population genetics of nonmigratory Allen’s Hummingbird (Selasphorus sasin sedentarius) following a recent mainland colonization

The population genetics of nonmigratory Allen’s Hummingbird (Selasphorus sasin sedentarius) following a recent mainland colonization

Prevalence and diversity of haemosporidians in a migratory high-elevation hummingbird in North America

Sampling affects population genetic inference: A case study of the Allen’s (Selasphorus sasin) and rufous hummingbird (Selasphorus rufus)

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