12 Works

Data from: Genome-wide sequence-based genotyping supports a nonhybrid origin of Castanea alabamensis

Matthew Taylor Perkins, Tetyana Zhebentyayeva, Paul H. Sisco & J. Hill Craddock
The genus Castanea in North America contains multiple tree and shrub taxa of conservation concern. The two species within the group, American chestnut (Castanea dentata) and chinquapin (C. pumila sensu lato), display remarkable morphological diversity across their distributions in the eastern United States and southern Ontario. Previous investigators have hypothesized that hybridization between C. dentata and C. pumila has played an important role in generating morphological variation in wild populations. A putative hybrid taxon, Castanea...

Data from: Cascading effects of pre-adult survival on sexual selection

Hope Klug
Sexual selection influences broad-scale patterns of biodiversity. While a large body of research has investigated the effect of mate competition on sexual selection, less work has examined how pre-adult life history influences sexual selection. We used a mathematical framework to explore the influence of pre-adult survival on sexual selection. Our model suggests that pre-adult male mortality will affect the strength of sexual selection when a fixed number of adult males have an advantageous mate-acquisition trait....

Eco-evolutionary causes and consequences of rarity in plants: a meta-analysis

Jennifer Boyd, Jill Anderson, Carol Baskauf, Jessica Brzyski & Jennifer Cruse-Sanders
Species differ dramatically in their prevalence in the natural world, with many species characterized as rare due to restricted geographic distribution, low local abundance, and/or habitat specialization. We investigated eco-evolutionary causes and consequences of rarity with phylogenetically-controlled meta-analyses of population genetic diversity, fitness, and functional traits in rare and common congeneric plant species. Our syntheses included 252 rare species and 267 common congeners reported in 153 peer-reviewed articles published from 1978-2020 and one manuscript in...

Comparing ultraconserved elements and exons for phylogenomic analyses of Middle American cichlids: When data agree to disagree

Fernando Alda, William B. Ludt, Diego J. Elías, Caleb D. McMahan & Prosanta Chakrabarty
Choosing among types of genomic markers to be used in a phylogenomic study can have a major influence on the cost, design, and results of a study. Yet few attempts have been made to compare categories of next-generation sequence markers limiting our ability to compare the suitability of these different genomic fragment types. Here we explore properties of different genomic markers to find if they vary in the accuracy of component phylogenetic trees and to...

Phenotypic plasticity and genetic diversity elucidate rarity and vulnerability of an endangered riparian plant

Jennifer Boyd, Jared Odell, Jennifer Cruse-Sanders, Will Rogers, Jill Anderson, Carol Baskauf & Jessica Brzyski
Anthropogenic environmental change threatens many species and can be especially challenging for rare species given their potentially limited capacity for migration and adaptation relative to more common species. The ability to acclimate via phenotypic plasticity could provide an important path to persistence, especially for rare species. We investigated the responses of an endangered plant species endemic to a highly dynamic riparian habitat in southeastern Tennessee, USA, and its most widespread congener to environmental change to...

Data from: The modulating role of group stability on fitness effects of group size is different in females and males of a communally rearing rodent

Luis A. Ebensperger, Loreto A. Correa, Cecilia León, Juan Ramírez-Estrada, Sebastian Abades, Alvaro Villegas & Loren D. Hayes
Group size may influence fitness benefits and costs that emerge from cooperative and competitive interactions in social species. However, evidence from plural breeding mammals indicates that group size is insufficient to explain variation in direct fitness, implying other attributes of social groups were overlooked. We studied the natural population of a social rodent during 5 years to test the hypothesis that social stability – in terms of group composition – modulates the effects of increasing...

Data from: Highly masculinized and younger males attain higher reproductive success in a social rodent

Loreto A. Correa, Cecilia León, Juan Ramírez-Estrada, Alvaro Ly-Prieto, Sebastian Abades, Loren D. Hayes, Mauricio Soto-Gamboa & Luis A. Ebensperger
Abstract: Alternative morphotypes have been reported in males of different taxa. In some mammals highly masculinized and slightly masculinized males represent two opposite ends along a gradient of phenotypic variation in males. This phenotypical gradient originates during prenatal development. Laboratory studies have documented how highly and slightly masculinized males differ in several traits, including their reproductive success. However, the extent to which these reported differences materialize in natural populations remains unknown. We quantified the impact...

Data from: Resolving deep nodes in an ancient radiation of neotropical fishes in the presence of conflicting signals from incomplete lineage sorting

Fernando Alda, Victor A. Tagliacollo, Maxwell J. Bernt, Brandon T. Waltz, William B. Ludt, Brant C. Faircloth, Michael E. Alfaro, James S. Albert & Prosanta Chakrabarty
Resolving patterns of ancient and rapid diversifications is one of the most challenging tasks in evolutionary biology. These difficulties arise from confusing phylogenetic signals that are associated with the interplay of incomplete lineage sorting and homoplasy. Phylogenomic analyses of hundreds, or even thousands, of loci offer the potential to resolve such contentious relationships. Yet, how much useful phylogenetic information these large data sets contain remains uncertain and often goes untested. Here, we assess the utility...

Data from: Visualizing connectivity of ecological and evolutionary concepts – an exploration of research on plant species rarity

Jennifer Boyd, Thomas Wiegand, Braley Gentry, Zachary McCoy, Craig Tanis, Hope Klug & Michael Bonsall
Understanding the ecological and evolutionary factors that influence species rarity has important theoretical and applied implications, yet the reasons why some species are rare while others are common remain unresolved. As a novel exploration of scientific knowledge, we used network analysis conceptually to visualize the foci of a comprehensive base of >800 studies on plant species rarity within the context of ecology and evolution. In doing so, we highlight existing research strengths that could substantiate...

More than just noise: chance, mating success, and sexual selection

Hope Klug & Libby Stone
Chance plays a critical but under-appreciated role in determining mating success. In many cases, we tend to think of chance as background noise that can be ignored in studies of mating dynamics. When the influence of chance is consistent across contexts, chance can be thought of as background noise; in other cases, however, the impact of chance on mating success can influence our understanding of how mates are acquired and how sexual selection operates. In...

Data from: Postcranial anatomy of the extinct terrestrial sloth Simomylodon uccasamamensis (Xenarthra: Mylodontidae) from the Pliocene of the Bolivian Altiplano and its evolutionary implications

Alberto Boscaini, Néstor Toledo, Bernardino Mamani Quispe, Rubén Andrade Flores, Marcos Fernández-Monescillo, Laurent Marivaux, Pierre-Olivier Antoine, Philippe Münch, Timothy Gaudin & François Pujos
Extinct terrestrial sloths are common elements of the late Cenozoic South American fossil record. Among them, Mylodontinae species were particularly abundant in the Americas throughout the Pleistocene epoch, and their anatomy is relatively well known. In contrast, less information is available from the Neogene record and particularly from localities at low latitudes, with an additional and considerable bias in favor of craniodental rather than postcranial remains. In this contribution, we provide comparative descriptions of several...

Data from: Resource acquisition and pre-copulatory sexual selection

Hope Klug
Sexual selection influences the evolution of phenotypic traits and contributes to patterns of biodiversity. In many animals, mating involves sequential steps. Often, individuals must secure resources that are essential for mating (nests, territories, food), and then after securing a resource, individuals engage in competition for access to limited opposite-sex mates and gametes. A large body of empirical research and some verbal models have illustrated that resource acquisition can influence sexual selection. In general, though, we...

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  • University of Tennessee at Chattanooga
  • University of Georgia
  • Seton Hill University
  • Pontifical Catholic University of Chile
  • Louisiana State University
  • Austin Peay State University
  • The American Chestnut Foundation
  • Field Museum of Natural History
  • Natural History Museum of Los Angeles County
  • Universidad Mayor