Correlation of Variation in the Wrentit with Environmental Gradients

Bowers, Darl E.

doi:10.2307/1365675

Cited by 15 publications

(6 citation statements)

References 9 publications

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“…Gray-plumaged birds tend to occupy high elevation, whereas yellow-plumaged birds tend to occupy lower elevations (Remsen and Graves 1995), thus suggesting that gray-plumages have evolved to deal with conditions on high elevations, but also some dry low-elevation environments (Sánchez-González et al 2015). Similar changes in plumage patterns like the one detected in our study, and their correlation with environmental variables, have been also documented for other bird groups throughout the World (see Bowers 1960, Hall et al 1966, Wunderle 1981, Galeotti and Cesaris 1996, Grunst et al 2014, Reudnik et al 2015). At the molecular level, plumage color changes are apparently a result of the concentration of lutein in the feather (Johnson and Brush 1972, Brush and Johnson 1976, McGraw and Hill 2006), however the specific mechanism in Atlapetes is unknown, although some studies point to single point mutations at the MCR-1 (melanocortin-1 receptor gene) as responsible for similar plumage changes in birds (reviewed in Mundy 2005, but see Cadena et al 2011).…”

Section: Discussionsupporting

confidence: 90%

Phylogeography indicates incomplete genetic divergence among phenotypically differentiated montane forest populations of Atlapetes albinucha (Aves, Passerellidae)

Rocha-Méndez

Sánchez‐González

Arbeláez‐Cortés

et al. 2018

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The White-naped Brushfinch (Atlapetesalbinucha) comprises up to eight allopatric subspecies mainly identified by the color of the underparts (gray vs. yellow belly). Yellow and gray bellied forms were long considered two different species (A.albinucha and A.gutturalis), but they are presently considered as one polytypic species. Previous studies in the genus Atlapetes have shown that the phylogeny, based on molecular data, is not congruent with characters such as coloration, ecology, or distributional patterns. The phylogeography of A.albinucha was analyzed using two mitochondrial DNA regions from samples including 24 different localities throughout montane areas from eastern Mexico to Colombia. Phylogeographic analyses using Bayesian inference, maximum likelihood and haplotype network revealed incomplete geographic structure. The genetic diversity pattern is congruent with a recent process of expansion, which is also supported by Ecological Niche Models (ENM) constructed for the species and projected into three past scenarios. Overall, the results revealed an incomplete genetic divergence among populations of A.albinucha in spite of the species’ ample range, which contrasts with previous results of phylogeographic patterns in other Neotropical montane forest bird species, suggesting idiosyncratic evolutionary histories for different taxa throughout the region.

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Section: Discussionsupporting

confidence: 90%

Phylogeography indicates incomplete genetic divergence among phenotypically differentiated montane forest populations of Atlapetes albinucha (Aves, Passerellidae)

Rocha-Méndez

Sánchez‐González

Arbeláez‐Cortés

et al. 2018

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“…However, there have been changes in morphology taking place within North American populations in the brief span of time since 1851 (Calhoun, 1947). In addition, the present study, together with that of Johnston and , documents evolutionary adjustment to diverse environments that has brought about patterns of geographic variation that are comparable with patterns of geographic variation manifest in a number of native species of birds and mammals (e.g., see Bowers, 1960).…”

Section: Mean Annual Precipitation Insupporting

confidence: 70%

House Sparrows: Evolution of Populations from the Great Plains and Colorado Rockies

Packard

1967

Systematic Zoology

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This study of House Sparrows was undertaken to determine the nature and degree of differentiation in color and morphology along a 1000-mile transect of the Great Plains and montane Colorado, and to relate these patterns of variation to climatic gradients encountered along the transect. The study is based upon examination of 785 specimens collected at 12 different localities in Illinois, Kansas, and Colorado.The results confirm earlier reports that North American House Sparrows have undergone conspicuous adaptive differentiation in color and morphology. Interpopulational variation in tarsus length is clinal and conforms with Allen's ecogeographic rule. Wing length of House Sparrows varies geographically, but variation of this character is not a function of altitude or isophane.Interpopulational variation in bill length of House Sparrows is thought to reflect differences in wear consequent to differences in abrasive action of food at the respective localities. There seems to be no relation between bill length and annual precipitation or ambient temperature. Partitioning of the food niche has not occurred in North America.Color of cryptic plumages of adult and subadult male House Sparrows varies clinally in accord with Gloger's ecogeographic rule. Auricular display plumage of adult males also varies in color, but the clinal pattern is opposite to that which obtains in cryptic plumages. No such trend in coloration is apparent in auricular plumage of subadult males.Clinal variation in color in accord with Gloger's rule is manifest in adult female House Sparrows, but not in subadults.Local differentiation has occurred in no more than 90 years. Slow rates of evolution thought to obtain for birds cannot be attributed in every instance to rigid restraints upon the genetic system; in some cases barriers to dispersal or relative constancy of the environment over long periods of time must have dictated rates of differentiation.

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“…Tarsal lengths of Song Sparrows do not appear to conform to Allen's ecogeographical rule, with the longer ones being found in southern birds, although this rule has been found to apply to members of the genus Parus (Snow 1 954), Wrentits (Bowers 1960), House Sparrows (Johnston 1969;Packard 1967;Johnston and Selander 1971), and Hermit Thrushes (Aldrich 1968). Investigations that agree with the present study by finding longer tarsi in northern birds, and, thus, conforming to Bergmann's rule as indicative of overall size of bird, are those with Brown Towhees (Davis 195 Differences by Life Area (Fig.…”

Section: Discussion Of All Tarsus Measurementsmentioning

confidence: 93%

“…Studies on other species of birds also have shown correlations between long wings and cold climates (e.g., Behle 1942;Calhoun 1947;Hawbecker 1948;Traylor 1950;Davis 1951;Pitelka 1951;Snow 1954;Hamilton 1958Hamilton , 1961Williamson 1958;Bowers 1960;Rand 1961;Selander 1964, 1971;Packard 1967;Power 1969Power , 1970Jackson 1970;James 1970;Johnston 1972;Niles 1973). Kendeigh (1969) discussed the physiological basis for Bergmann's rule.…”

Section: Discussion Of All Wing Measurementsmentioning

confidence: 99%

Ecogeographical Variation in Size and Proportions of Song Sparrows (Melospiza melodia)

Aldrich¹

1984

Ornithological Monographs

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show abstract

Correlation of Variation in the Wrentit with Environmental Gradients

Cited by 15 publications

References 9 publications

Phylogeography indicates incomplete genetic divergence among phenotypically differentiated montane forest populations of Atlapetes albinucha (Aves, Passerellidae)

Phylogeography indicates incomplete genetic divergence among phenotypically differentiated montane forest populations of Atlapetes albinucha (Aves, Passerellidae)

House Sparrows: Evolution of Populations from the Great Plains and Colorado Rockies

Ecogeographical Variation in Size and Proportions of Song Sparrows (Melospiza melodia)

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