226 research outputs found
A nativist upsurge : Kentucky\u27s Know Nothing Party of the 1850s.
This thesis analyzes the rise and fall of the Know Nothing Party in Kentucky. Beginning with the presidential election of 1844, this thesis traces the decline of the Whig Party and the growth of nativism in the mid-nineteenth century. In addition to the political shift, the thesis explores the growing immigration numbers of the 1840s and 1850s and the anti-Catholicism that propelled nativist attitudes. While the issue of slavery sank the national Whig Party, this thesis argues that the failure to address concerns over immigration and naturalization largely led to the party’s downfall in Kentucky. Destroying the second party system, a myriad of political concerns gravitated under the Know Nothing banner, including Unionism, temperance, public schooling, and anti-party sentiment. This thesis argues that fervent nativists and anti-party voters felt particularly betrayed as old-line Kentucky Whigs pushed aside longtime nativists for nominations on the Know Nothing ticket
A Reference Genome For The Nectar-Robbing Black-Throated Flowerpiercer (Diglossa Brunneiventris)
Black-throated Flowerpiercers (Diglossa brunneiventris) are one species representing a phenotypically specialized group of tanagers (Thraupidae) that have hooked bills which allow them to feed by stealing nectar from the base of flowers. Members of the genus are widely distributed in montane regions from Mexico to northern Argentina, and previous studies of Diglossa have focused on their systematics, phylogenetics, and interesting natural history. Despite numerous studies of species within the genus, no genome assembly exists to represent these nectivorous tanagers. We described the assembly of a genome sequence representing a museum-vouchered, wild, female D. brunneiventris collected in Peru. By combining Pacific Biosciences Sequel long-read technology with 10x linked-read and reference-based scaffolding, we produced a 1.08 Gbp pseudochromosomal assembly including 600 scaffolds with a scaffold N50 of 67.3 Mbp, a scaffold L50 of 6, and a BUSCO completeness score of 95%. This new assembly improves representation of the diverse species that comprise the tanagers, improves on scaffold lengths and contiguity when compared to existing genomic resources for tanagers, and provides another avenue of research into the genetic basis of adaptations common to a nectivorous lifestyle among vertebrates
Sexual selection on plumage and behavior in an avian hybrid zone: Experimental tests of male-male interactions
In western Panama, an unusual hybrid zone exists between white-collared manakins, Manacus candei, and golden-collared manakins, M. vitellinus. Unidirectional introgression of plumage traits from vitellinus into candei has created a region in which all definitively plumaged males have a collar that is lemon-colored. These males are nearly indistinguishable from white-collared candei genetically and morphometrically, but strongly resemble golden-collared vitellinus due to the introgression of secondary sexual plumage traits, particularly the lemon-colored collar. The introgression could be explained by sexual selection for golden-collared traits or by a series of mechanisms that do not invoke sexual selection (e.g., neutral diffusion, dominant allele). Sexual selection on male-male interactions implies behavioral differences among the plumage forms - specifically that golden- and lemon-collared males should be more aggressive than white-collared males, In contrast, the nonsexual hypotheses predict behavioral similarity between lemon- and white-collared males, based on their nearly identical genetics. We tested the sexual selection hypothesis experimentally, by presenting males with taxidermic mounts of the three forms. As response variables, we monitored vocalizations and attacks on the mounts by replicate subject males. Both golden-collared and lemon-collared males were more likely to attack than were white-collared males, as predicted under sexual selection but not by the nonsexual hypotheses. Lemon-collared males were more vocally reactive than either parental form, contrary to the prediction of the nonsexual hypotheses. Our study demonstrates that sexual selection on male-male interactions may play an important role in the dynamics of character evolution and hybrid zones
Characterization of microsatellite loci for a threatened species, the King Rail, Rallus elegans, using a next-generation sequencing protocol
The King Rail Rallus elegans (Audubon) has experienced population declines of 4.6 % per year on average since the 1960s. Wetland loss, most severely affecting inland marshes, has significantly reduced this species\u27 distribution to the coastal margins of its historic range. Polymorphic microsatellite markers were generated by 454 pyrosequencing of genomic DNA from King Rails, and Clapper Rails R. longirostris from Louisiana after AFLP enrichment and barcoding of restriction fragment cut sites across individuals. Of 1,419 microsatellite-containing sequences, 20 hypervariable microsatellite loci with up to 20 different alleles were identified at the alignment stage. We characterized nine loci, tested variability in 45 Atlantic coast King Rail samples, and detected 4-19 alleles per locus. Cross-species amplification revealed variability in the Virginia Rail, R. limicola, and Sora, Porzana carolina. These loci will be useful for studying secretive marsh rails, many of which are threatened or endangered. © 2013 Springer Science+Business Media Dordrecht
Andean Land Use And Biodiversity: Humanized Landscapes In A Time Of Change
Some landscapes Cannot be understood without reference., to the kinds. degrees, kinds, degrees, and history of human-caused modifications to the Earth's surface. The tropical latitudes of the Andes represent one such place, with agricultural land-use systems appearing in the Early Holocene. Current land use includes both intensive and extensive grazing and crop- or tree-based agricultural systems found across virtually the, entire range of possible elevations and humidity regimes. Biodiversity found in or adjacent to such humanized landscapes will have been altered in abundance. composition, and distribution in relation to the resiliency of the native Species to harvest, hold cover modifications, and other deliberate or inadvertent human land uses. In addition, the geometries of land cover, resulting flout difference among the shapes, sizes, connectivities, and physical structures of the patches, corridors, and matrices that compose landscape mosaics, will constrain biodiversity, often in predictable ways. This article proposes a conceptual model that alter ins that the Continued persistence of native species may depend as much oil the shifting Of Andean landscape mosaics as on species characteristics, themselves. Furthermore, mountains such as the Andes display long gradients of environmental Conditions that after in relation to latitude, soil moisture, aspect, and elevation. Global environmental change will shift these, especially temperature and humidity regimes along elevational gradients, causing Changes outside the historical range of variation for some species. Both land-use systems and Conservation efforts will need to respond spatially to these shifts in the future, at both landscape and regional scales.Geography and the Environmen
Modifying and Supplementing Annie\u27s Project to Increase Impact in New Jersey and Beyond
Annie\u27s Project is a widely known risk management program emphasizing five areas of risk and creating support networks for women in agriculture. Designed as an 18-hr course delivered through a series of face-to-face classes, it can be adapted to meet the learning needs and time constraints of the target audience and instructors. This article describes modifications and additions to the traditional program delivery that were implemented by the Annie\u27s Project New Jersey team: synchronous learning at multiple locations, archived video-recorded classes, condensed 1-day workshops, a supplemental program about estate and farm transition planning, archived webinars, and international adaptations of the program
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