Willet be one species or two? A genomic view of the evolutionary history of<i>Tringa semipalmata</i>

Oswald, Jessica A.; Harvey, Michael; Remsen, Rosalind C.; Foxworth, DePaul U.; Cardiff, Steven W.; Dittmann, Donna L.; Megna, Libby C.; Carling, Matthew D.; Brumfield, Robb T.

doi:10.1642/auk-15-232.1

Cited by 45 publications

(46 citation statements)

References 62 publications

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“…, Supporting Information Table , for details see Oswald et al. ). The logistic regression models based on reproductive isolation indices calculated from all 88 cases, or subcategories including genetic data (both genetic and phenotypic methods—50 examples, and genetic only—31 examples) had time as a significant or near‐significant predictor of reproductive isolation, but only in the forced‐intercept models (see Supporting Information Table ).…”

Section: Resultsmentioning

confidence: 99%

“…The only other younger known case of complete reproductive isolation upon secondary contact we found is in two subspecies of Willets (Tringa semipalmata semipalmata and Tringa semipalmata inornata) that are only 700,000 years apart; however, the two species do not overlap in their breeding ranges (Fig. 5, Supporting Information Table S2, for details see Oswald et al 2016). The logistic regression models based on reproductive isolation indices calculated from all 88 cases, or subcategories including genetic data (both genetic and phenotypic methods-50 examples, and genetic only-31 examples) had time as a significant or near-significant predictor of reproductive isolation, but only in the forced-intercept models (see Supporting Information Table S3).…”

Section: Contactmentioning

confidence: 95%

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Rapid, complete reproductive isolation in two closely relatedZosteropsWhite‐eye bird species despite broadly overlapping ranges*

Cowles

2019

Evolution

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Examining what happens when two closely related species come into secondary contact provides insight into the later stages of the speciation process. The Zosteropidae family of birds is one of the most rapidly speciating vertebrate lineages. Members of this family are highly vagile and geographically widespread, raising the question of how divergence can occur if populations can easily come into secondary contact. On the small island of Kolombangara, two closely related nonsister species of white‐eyes, Zosterops kulambangrae and Zosterops murphyi, are distributed along an elevational gradient and come into secondary contact at mid‐elevations. We captured 134 individuals of both species along two elevational transects. Using genotyping‐by‐sequencing data and a mitochondrial marker, we found no evidence of past hybridization events and strong persistence of species boundaries, even though the species have only been diverging for approximately 2 million years. We explore potential reproductive barriers that allow the two species to coexist in sympatry, including premating isolation based on divergence in plumage and song. We also conducted a literature review to determine the time it takes to evolve complete reproductive isolation in congeneric avian species/subspecies in secondary contact (restricted to cases where congeneric taxa are parapatric or have a hybrid zone), finding our study is one of the youngest examples of complete reproductive isolation studied in a genomic context reported in birds.

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Section: Resultsmentioning

confidence: 99%

Section: Contactmentioning

confidence: 95%

Rapid, complete reproductive isolation in two closely relatedZosteropsWhite‐eye bird species despite broadly overlapping ranges*

Cowles

2019

Evolution

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“…Choice of molecular markers could be important in this regard. We do not foresee that mtDNA data will provide a biased estimate of species diversity [27]. …”

Section: Discussionmentioning

confidence: 99%

How Many Kinds of Birds Are There and Why Does It Matter?

et al. 2016

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Estimates of global species diversity have varied widely, primarily based on variation in the numbers derived from different inventory methods of arthropods and other small invertebrates. Within vertebrates, current diversity metrics for fishes, amphibians, and reptiles are known to be poor estimators, whereas those for birds and mammals are often assumed to be relatively well established. We show that avian evolutionary diversity is significantly underestimated due to a taxonomic tradition not found in most other taxonomic groups. Using a sample of 200 species taken from a list of 9159 biological species determined primarily by morphological criteria, we applied a diagnostic, evolutionary species concept to a morphological and distributional data set that resulted in an estimate of 18,043 species of birds worldwide, with a 95% confidence interval of 15,845 to 20,470. In a second, independent analysis, we examined intraspecific genetic data from 437 traditional avian species, finding an average of 2.4 evolutionary units per species, which can be considered proxies for phylogenetic species. Comparing recent lists of species to that used in this study (based primarily on morphology) revealed that taxonomic changes in the past 25 years have led to an increase of only 9%, well below what our results predict. Therefore, our molecular and morphological results suggest that the current taxonomy of birds understimates avian species diversity by at least a factor of two. We suggest that a revised taxonomy that better captures avian species diversity will enhance the quantification and analysis of global patterns of diversity and distribution, as well as provide a more appropriate framework for understanding the evolutionary history of birds.

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“…However, only the cores of these loci are conserved, and variation increases in the regions flanking this core (Faircloth et al, ; Gilbert et al, ). In fact, SNPs gathered from UCEs have been proven informative in detecting population structure at shallow timescales for various taxa (e.g., in birds: Harvey, Aleixo, Ribas, & Brumfield, ; Oswald et al, ; Smith, Harvey, Faircloth, Glenn, & Brumfield, , and fishes: Burress et al, ). Thus, it is likely that the similarities between the mitochondrial and UCE loci reflect an actual shared history, and that this situation echoes one in which a single species displays color variation across its range.…”

Section: Discussionmentioning

confidence: 99%

Genomic, ecological, and morphological approaches to investigating species limits: A case study in modern taxonomy from Tropical Eastern Pacific surgeonfishes

Ludt

Bernal

Kenworthy

et al. 2019

Ecology and Evolution

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A wide variety of species are distinguished by slight color variations. However, molecular analyses have repeatedly demonstrated that coloration does not always correspond to distinct evolutionary histories between closely related groups, suggesting that this trait is labile and can be misleading for species identification. In the present study, we analyze the evolutionary history of sister species of Prionurus surgeonfishes in the Tropical Eastern Pacific (TEP), which are distinguished by the presence or absence of dark spots on their body. We examined the species limits in this system using comparative specimen‐based approaches, a mitochondrial gene (COI), more than 800 nuclear loci (Ultraconserved Elements), and abiotic niche comparisons. The results indicate there is a complete overlap of meristic counts and morphometric measurements between the two species. Further, we detected multiple individuals with intermediate spotting patterns suggesting that coloration is not diagnostic. Mitochondrial data recovered a single main haplotype shared between the species and all locations resulting in a complete lack of structure (Φ ST = 0). Genomic analyses also suggest low levels of genetic differentiation ( F ST = 0.013), and no alternatively fixed SNPs were detected between the two phenotypes. Furthermore, niche comparisons could not reject niche equivalency or similarity between the species. These results suggest that these two phenotypes are conspecific and widely distributed in the TEP. Here, we recognize Prionurus punctatus Gill 1862 as a junior subjective synonym of P. laticlavius (Valenciennes 1846). The underlying causes of phenotypic variation in this species are unknown. However, this system gives insight into general evolutionary dynamics within the TEP.

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Willet be one species or two? A genomic view of the evolutionary history ofTringa semipalmata

Cited by 45 publications

References 62 publications

Rapid, complete reproductive isolation in two closely relatedZosteropsWhite‐eye bird species despite broadly overlapping ranges*

Rapid, complete reproductive isolation in two closely relatedZosteropsWhite‐eye bird species despite broadly overlapping ranges*

How Many Kinds of Birds Are There and Why Does It Matter?

Genomic, ecological, and morphological approaches to investigating species limits: A case study in modern taxonomy from Tropical Eastern Pacific surgeonfishes

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