34 Works

Data from: Temperature variability and moisture synergistically interact to exacerbate an epizootic disease

Thomas R. Raffel, Neal T. Halstead, Taegan A. McMahon, Andrew K. Davis & Jason R. Rohr
Climate change is altering global patterns of precipitation and temperature variability, with implications for parasitic diseases of humans and wildlife. A recent study confirmed predictions that increased temperature variability could exacerbate disease, because of lags in host acclimation following temperature shifts. However, the generality of these host acclimation effects and the potential for them to interact with other factors have yet to be tested. Here, we report similar effects of host thermal acclimation (constant versus...

Data from: Resolving conflict in eutherian mammal phylogeny using phylogenomics and the multispecies coalescent model

Liang Liu, Scott V. Edwards & Shaoyuan Wu
The reconstruction of the Tree of Life has relied almost entirely on concatenation methods, which do not accommodate gene tree heterogeneity, a property that simulations and theory have identified as a likely cause of incongruent phylogenies. However, this incongruence has not yet been demonstrated in empirical studies. Several key relationships among eutherian mammals remain controversial and conflicting among previous studies, including the root of eutherian tree and the relationships within Euarchontoglires and Laurasiatheria. Both Bayesian...

Data from: Predator-prey trophic relationships in response to organic management practices

Jason M. Schmidt, Sarah K. Barney, Mark A. Williams, Ricardo T. Bessin, Timothy W. Coolong & James D. Harwood
A broad range of environmental conditions likely regulate predator-prey population dynamics and impact the structure of these communities. Central to understanding the interplay between predator and prey populations and their importance is characterizing the corresponding trophic interactions. Here we use a well-documented molecular approach to examine the structure of the community of natural enemies preying upon the squash bug, Anasa tristis, a herbivorous cucurbit pest that severely hinders organic squash and pumpkin production in the...

Data from: Life history costs make perfect sprouting maladaptive in two herbaceous perennials

Richard P. Shefferson, Robert J. Warren & H. Ronald Pulliam
1.Why some herbaceous plant species refrain from sprouting in some years is a longstanding puzzle in plant ecology. When vegetatively “dormant”, the plant lives as a rootstock, but does not produce or maintain photosynthetic tissue. During this time, energy may be remobilized from resource reserves, or acquired from mycorrhizal fungi, although the mechanisms are still poorly understood. If vegetative dormancy is adaptive, it may be in response to a harsh environment, to life history costs,...

Data from: Population genetics of Setaria viridis, a new model system

Pu Huang, Maximilian Feldman, Stephan Schroder, Bochra A. Bahri, Xianmin Diao, Hui Zhi, Matt Estep, Ivan Baxter, Katrien M. Devos & Elizabeth A. Kellogg
An extensive survey of the standing genetic variation in natural populations is among the priority steps in developing a species into a model system. In recent years, green foxtail (Setaria viridis), along with its domesticated form foxtail millet (S. italica), has rapidly become a promising new model system for C4 grasses and bioenergy crops, due to its rapid life cycle, large amount of seed production, and small diploid genome, among other characters. However, remarkably little...

Data from: A phylogenomic analysis of turtles

Nicholas G. Crawford, James F. Parham, Anna B. Sellas, Brant C. Faircloth, Travis C. Glenn, Theodore J. Papefuss, James B. Henderson, Madison H. Hansen, W. Brian Simison & Theodore J. Papenfuss
Molecular analyses of turtle relationships have overturned prevailing morphological hypotheses and prompted the development of a new taxonomy. Here we provide the first genome-scale analysis of turtle phylogeny. We sequenced 2,381 ultraconserved element (UCE) loci representing a total of 1,718,154 bp of aligned sequence. Our sampling includes 32 turtle taxa representing all 14 recognized turtle families and an additional six outgroups. Maximum likelihood, Bayesian, and species tree methods produce a single resolved phylogeny. This robust...

Data from: Mosquitoes rely on their gut microbiota for development

Kerri L. Coon, Kevin J. Vogel, Mark R. Brown & Michael R. Strand
Field studies indicate adult mosquitoes (Culicidae) host low diversity communities of bacteria that vary greatly among individuals and species. In contrast, it remains unclear how adult mosquitoes acquire their microbiome, what influences community structure, and whether the microbiome is important for survival. Here we used pyrosequencing of 16S rRNA to characterize the bacterial communities of three mosquito species reared under identical conditions. Two of these species, Aedes aegypti and Anopheles gambiae, are anautogenous and must...

Data from: Loss of migratory behavior increases infection risk for a butterfly host

Dara A. Satterfield, John C. Maerz & Sonia Altizer
Long-distance animal migrations have important consequences for infectious disease dynamics. In some cases, migration lowers pathogen transmission by removing infected individuals during strenuous journeys and allowing animals to periodically escape contaminated habitats. Human activities are now causing some migratory animals to travel shorter distances or form sedentary (non-migratory) populations. We focused on North American monarch butterflies and a specialist protozoan parasite to investigate how the loss of migratory behaviours affects pathogen spread and evolution. Each...

Data from: Sexual selection is influenced by both developmental and adult environments

Stephanie R. Gillespie, M. Scarlett Tudor, Allen J. Moore & Christine W. Miller
Sexual selection is often assumed to be strong and consistent, yet increasing research shows it can fluctuate over space and time. Few experimental studies have examined changes in sexual selection in response to natural environmental variation. Here, we use a difference in resource quality to test for the influence of past environmental conditions and current environmental conditions on male and female mate choice and resulting selection gradients for leaf-footed cactus bugs, Narnia femorata. We raised...

Data from: Are species differences in maternal effects arising from maternal care adaptive?

Kyle M. Benowitz, Katherine J. Moody & Allen J. Moore
Parental care benefits offspring through maternal effects influencing their development, growth and survival. However, although parental care in general is likely the result of adaptive evolution, it does not follow that specific differences in the maternal effects that arise from care are also adaptive. Here, we used an interspecific cross-fostering design in the burying beetle species Nicrophorus orbicollis and N. vespilloides, both of which have elaborate parental care involving direct feeding of regurgitated food to...

Data from: Aphid-encoded variability in susceptibility to a parasitoid

Adam J. Martinez, Shannon G. Ritter, Matthew R. Doremus, Jacob A. Russell & Kerry M. Oliver
Background: Many animals exhibit variation in resistance to specific natural enemies. Such variation may be encoded in their genomes or derived from infection with protective symbionts. The pea aphid, Acyrthosiphon pisum, for example, exhibits tremendous variation in susceptibility to a common natural enemy, the parasitic wasp Aphidius ervi. Pea aphids are often infected with the heritable bacterial symbiont, Hamiltonella defensa, which confers partial to complete resistance against this parasitoid depending on bacterial strain and associated...

Data from: Genus-wide microsatellite primers for the goldenrods (Solidago; Asteraceae)

James B. Beck, John C. Semple, Justin M. Brull, Stacey L. Lance, Mai M. Phillips, Sara B. Hoot & Gretchen A. Meyer
Premise of the study: Microsatellite primers were developed for studies of polyploid evolution, ecological genetics, conservation genetics, and species delimitation in the genus Solidago. Methods and Results: Illumina sequencing of a shotgun library from S. gigantea identified ca. 1900 putative single-copy loci. Fourteen loci were subsequently shown to be amplifiable, single-copy, and variable in a broad range of Solidago species. Conclusions: The utility of these markers both across the genus and in herbarium specimens of...

Data from: The whitefly-associated facultative symbiont Hamiltonella defensa suppresses induced plant defences in tomato

Qi Su, Kerry M. Oliver, Wen Xie, Qingjun Wu, Shaoli Wang & Youjun Zhang
1. Maternally inherited bacterial symbionts are present in many, if not most, insect species. While there is rapidly accumulating evidence that facultative, heritable symbionts often protect insect hosts from natural enemies, there have been few clear examples where facultative symbionts mediate herbivore–plant interactions. 2. The phloem-feeding whitefly, Bemisia tabaci, is a major agricultural pest that frequently harbours facultative symbionts, including Hamiltonella defensa. While H. defensa and other facultative symbionts have been shown to improve whitefly...

Data from: Determining population structure and hybridization for two iris species

Jennafer A. P. Hamlin & Michael L. Arnold
Identifying processes that promote or limit gene flow can help define the ecological and evolutionary history of a species. Furthermore, defining those factors that make up “species boundaries” can provide a definition of the independent evolutionary trajectories of related taxa. For many species, the historic processes that account for their distribution of genetic variation remain unresolved. In this study, we examine the geographic distribution of genetic diversity for two species of Louisiana Irises, Iris brevicaulis...

Data from: Mating system contributes only slightly to female maintenance in gynodioecious Geranium maculatum (Geraniaceae)

James L. Hamrick, Shu-Mei Chang, Megan L. Van Etten & A. Cecile Deen
Gynodioecy, the co-occurrence of female and hermaphroditic individuals within a population, is an important intermediate in the evolution of separate sexes. The first step, female maintenance, requires females to have higher seed fitness compared with hermaphrodites. A common mechanism thought to increase relative female fitness is inbreeding depression avoidance, the magnitude of which depends on hermaphroditic selfing rates and the strength of inbreeding depression. Less well studied is the effect of biparental inbreeding on female...

Data from: Adaptive evolution and environmental durability jointly structure phylodynamic patterns in avian influenza viruses

Benjamin Roche, John M. Drake, Justin Brown, David E. Stallknecht, Trevor Bedford & Pejman Rohani
Avian influenza viruses (AIVs) have been pivotal to the origination of human pandemic strains. Despite their scientific and public health significance, however, there remains much to be understood about the ecology and evolution of AIVs in wild birds, where major pools of genetic diversity are generated and maintained. Here, we present comparative phylodynamic analyses of human and AIVs in North America, demonstrating (i) significantly higher standing genetic diversity and (ii) phylogenetic trees with a weaker...

Data from: Genetic analysis of safflower domestication

Stephanie A. Pearl, John E. Bowers, Sebastian Reyes-Chin-Wo, Richard W. Michelmore & John M. Burke
Background: Safflower (Carthamus tinctorius L.) is an oilseed crop in the Compositae (a.k.a. Asteraceae) that is valued for its oils rich in unsaturated fatty acids. Here, we present an analysis of the genetic architecture of safflower domestication and compare our findings to those from sunflower (Helianthus annuus L.), an independently domesticated oilseed crop within the same family. We mapped quantitative trait loci (QTL) underlying 24 domestication-related traits in progeny from a cross between safflower and...

Data from: Speciation and introgression between Mimulus nasutus and Mimulus guttatus

Yaniv Brandvain, Amanda M. Kenney, Lex Flagel, Graham Coop & Andrea L. Sweigart
Mimulus guttatus and M. nasutus are an evolutionary and ecological model sister species pair differentiated by ecology, mating system, and partial reproductive isolation. Despite extensive research on this system, the history of divergence and differentiation in this sister pair is unclear. We present and analyze a population genomic data set which shows that M. nasutus budded from a central Californian M. guttatus population within the last 200 to 500 thousand years. In this time, the...

Data from: Tree phenology responses to winter chilling, spring warming, at north and south range limits

James S. Clarke, Carl Salk, Jerry M. Melillo, Jacqueline Mohan & James S. Clark
Increases in primary production may occur if plants respond to climate warming with prolonged growing seasons, but not if local adaptation, cued by photoperiod, limits phenological advance. It has been hypothesized that trees with diffuse porous xylem anatomy and early successional species may respond most to warming. Within species, northern populations may respond most due to the fact that growing seasons are relatively short. Species most sensitive to spring temperature may show little overall response...

Data from: Reinforcement shapes clines in female mate discrimination in Drosophila subquinaria

Emily R. Bewick & Kelly A. Dyer
Reinforcement of species boundaries may alter mate recognition in a way that also affects patterns of mate preference among conspecific populations. In the fly Drosophila subquinaria, females sympatric with the closely related species D. recens reject mating with heterospecific males as well as with conspecific males from allopatric populations. Here we assess geographic variation in behavioral isolation within and among populations of D. subquinaria and use cline theory to understand patterns of selection on reinforced...

Data from: Multivariate adaptation but no increase in competitive ability in invasive Geranium carolinianum L. (Geraniaceae)

Rebecca Yukiko Shirk & James L. Hamrick
Adaptive evolution can affect the successful establishment of invasive species, but changes in selective pressures, loss of genetic variation in relevant traits, and/or altered trait correlations can make adaptation difficult to predict. We used a common-garden experiment to assess trait correlations and patterns of adaptation in the invasive plant, Geranium carolinianum, sampled across 20 populations in its native (US) and invasive (China) ranges. We used multivariate QST – FST tests to determine if phenotypic differences...

Data from: A target enrichment method for gathering phylogenetic information from hundreds of loci: an example from the Compositae

Jennifer R. Mandel, Rebecca B. Dikow, Vicki A. Funk, Rishi R. Masalia, S. Evan Staton, Alex Kozik, Richard W. Michelmore, Loren H. Rieseberg & John M. Burke
Premise of the study: The Compositae (Asteraceae) are a large and diverse family of plants, and the most comprehensive phylogeny to date is a meta-tree based on 10 chloroplast loci that has several major unresolved nodes. We describe the development of an approach that enables the rapid sequencing of large numbers of orthologous nuclear loci to facilitate efficient phylogenomic analyses. Methods and Results: We designed a set of sequence capture probes that target conserved orthologous...

Data from: Ebola cases and health system demand in Liberia

John M. Drake, RajReni B. Kaul, Laura W. Alexander, Suzanne M. O'Regan, Andrew M. Kramer, J. Tomlin Pulliam, Matthew J. Ferrari, Andrew W. Park & Suzanne M. O’Regan
In 2014, a major epidemic of human Ebola virus disease emerged in West Africa, where human-to-human transmission has now been sustained for greater than 12 months. In the summer of 2014, there was great uncertainty about the answers to several key policy questions concerning the path to containment. What is the relative importance of nosocomial transmission compared with community-acquired infection? How much must hospital capacity increase to provide care for the anticipated patient burden? To...

Data from: The evolution of peafowl and other taxa with ocelli (eyespots): a phylogenomic approach

Keping Sun, Kelly A. Meiklejohn, Brant C. Faircloth, Travis C. Glenn, Edward L. Braun & Rebecca T. Kimball
The most striking feature of peafowl (Pavo) is the males' elaborate train, which exhibits ocelli (ornamental eyespots) that are under sexual selection. Two additional genera within the Phasianidae (Polyplectron and Argusianus) exhibit ocelli, but the appearance and location of these ornamental eyespots exhibit substantial variation among these genera, raising the question of whether ocelli are homologous. Within Polyplectron, ocelli are ancestral, suggesting ocelli may have evolved even earlier, prior to the divergence among genera. However,...

Data from: Leaf litter nutrient uptake in an intermittent blackwater river: influence of tree species and associated biotic and abiotic drivers

Andrew S. Mehring, Kevin A. Kuehn, Aaron Thompson, Catherine M. Pringle, Amy D. Rosemond, Matthew R. First, R Richard Lowrance & George Vellidis
1. Organic matter may sequester nutrients as it decomposes, increasing in total N and P mass via multiple uptake pathways. During leaf litter decomposition, microbial biomass and accumulated inorganic materials immobilize and retain nutrients, and therefore, both biotic and abiotic drivers may influence detrital nutrient content. We examined the relative importance of these types of nutrient immobilization and compared patterns of nutrient retention in recalcitrant and labile leaf litter. 2. Leaf packs of water oak...

Registration Year

  • 2014
    34

Resource Types

  • Dataset
    34

Affiliations

  • University of Georgia
    34
  • University of Florida
    3
  • University of California, Davis
    3
  • University of Michigan-Ann Arbor
    2
  • Smithsonian Institution
    2
  • Donald Danforth Plant Science Center
    1
  • City University of New York
    1
  • University of Tampa
    1
  • Fred Hutchinson Cancer Research Center
    1
  • Centre d'Ecologie Fonctionnelle et Evolutive
    1