39 Works

Data from: Insights into the development and evolution of exaggerated traits using de novo transcriptomes of two species of horned scarab beetles

Ian A. Warren, J. Cristobal Vera, Annika Johns, Robert Zinna, James H. Marden, Douglas J. Emlen, Ian Dworkin & Laura C. Lavine
Scarab beetles exhibit an astonishing variety of rigid exo-skeletal outgrowths, known as “horns”. These traits are often sexually dimorphic and vary dramatically across species in size, shape, location, and allometry with body size. In many species, the horn exhibits disproportionate growth resulting in an exaggerated allometric relationship with body size, as compared to other traits, such as wings, that grow proportionately with body size. Depending on the species, the smallest males either do not produce...

Data from: From refugia to rookeries: phylogeography of Atlantic green turtles

Eugenia Naro-Maciel, Brendan N. Reid, S. Elizabeth Alter, George Amato, Karen A. Bjorndal, Alan B. Bolten, Meredith Martin, Campbell J. Nairn, Brian Shamblin & Oscar Pineda-Catalan
Investigating species’ distribution and abundance over time is central to evolutionary biology, and provides important context for conservation and management. With respect to population genetic structure in green sea turtles (Chelonia mydas), certain processes such as female philopatry to natal rookeries are well understood, while others, such as male philopatry and historical changes in distribution and abundance, remain relatively understudied. Further, although inferences from mitochondrial DNA and nuclear microsatellites have both been critical in identifying...

Data from: Nucleotide polymorphism and copy number variant detection using exome capture and next generation sequencing in the polyploid grass Panicum virgatum

Joseph Evans, Jeongwoon Kim, Kevin L. Childs, Brieanne Vaillancourt, Emily Crisovan, Aruna Nandety, Daniel J. Gerhardt, Todd A. Richmond, Jeffrey A. Jeddeloh, Shawn M. Kaeppler, Michael D. Casler & C. Robin Buell
Switchgrass (Panicum virgatum) is a polyploid, outcrossing grass species native to North America and has recently been recognized as a potential biofuel feedstock crop. Significant phenotypic variation including ploidy is present across the two primary ecotypes of switchgrass, referred to as upland and lowland switchgrass. The tetraploid switchgrass genome is approximately 1400 Mbp, split between two subgenomes, with significant repetitive sequence content limiting the efficiency of re-sequencing approaches for determining genome diversity. To characterize genetic...

Data from: Indirect effects drive evolutionary responses to global change

Jennifer A. Lau, Ruth G. Shaw, Peter B. Reich & Peter Tiffin
Anthropogenic environmental changes pose significant threats to plant and animal populations. These changes also may affect the evolution of natural populations either directly or indirectly by altering the outcome of species interactions that are important drivers of evolution. This latter indirect pathway may be especially important for evolutionary responses to elevated atmospheric CO2 concentrations (eCO2), which appear to have minimal direct effects on plant evolution but have large effects on interspecific interactions, such as competition....

Data from: The relative importance of rapid evolution for plant-microbe interactions depends on ecological context

Casey P. TerHorst, Jennifer A. Lau & Jay T. Lennon
Evolution can occur on ecological time-scales, affecting community and ecosystem processes. However, the importance of evolutionary change relative to ecological processes remains largely unknown. Here, we analyse data from a long-term experiment in which we allowed plant populations to evolve for three generations in dry or wet soils and used a reciprocal transplant to compare the ecological effect of drought and the effect of plant evolutionary responses to drought on soil microbial communities and nutrient...

Data from: Divergent host preferences of above- and below-ground Culex pipiens (Diptera: Culicidae) and their hybrid offspring.

Megan L. Fritz, Edward D. Walker, James R. Miller, David W. Severson & Ian Dworkin
Culex pipiens form pipiens and Cx. pipiens form molestus (Diptera: Culicidae) belong to a cosmopolitan taxonomic group known as the Pipiens Assemblage. Hybridization between these forms is thought to contribute to human transmission of West Nile virus (WNV) in North America. Complementary choice and no-choice landing assays were developed to examine host acceptance by North American Cx. pipiens in the laboratory. Populations collected from above- and below-ground sites in suburban Chicago were identified as forms...

Data from: Genetic variation in invasive species response to direct and indirect species interactions

Casey P. TerHorst & Jennifer A. Lau
Biotic resistance to invasion arises from strong species interactions that decrease the fitness and population growth rates of potential invaders. Strong, direct interactions such as predation and competition are typically thought to drive biotic resistance, but in diverse communities, indirect interactions among species may also affect biotic resistance. Further, genetic variation in traits of the invading species that affect species interactions may allow some genotypes to overcome biotic resistance. We investigated the direct and indirect...

Data from: Shrubs as ecosystem engineers across an environmental gradient: effects on species richness and exotic plant invasion

Andrew R. Kleinhesselink, Susan M. Magnoli & J. Hall Cushman
Ecosystem-engineering plants modify the physical environment and can increase species diversity and exotic species invasion. At the individual level, the effects of ecosystem engineers on other plants often become more positive in stressful environments. In this study, we investigated whether the community-level effects of ecosystem engineers also become stronger in more stressful environments. Using comparative and experimental approaches, we assessed the ability of a native shrub (Ericameria ericoides) to act as an ecosystem engineer across...

Data from: Evolutionary rates for multivariate traits: the role of selection and genetic variation

William Pitchers, Jason Wolf, Tom Tregenza, John Hunt & Ian Dworkin
A fundamental question in evolutionary biology is the relative importance of selection and genetic architecture in determining evolutionary rates. Adaptive evolution can be described by the multivariate breeders' equation, which predicts evolutionary change for a suite of phenotypic traits as a product of directional selection acting on them (β) and the genetic variance–covariance matrix for those traits (G). Despite being empirically challenging to estimate, there are enough published estimates of G and β to allow...

Data from: Bayesian hierarchical models for spatially misaligned data in R

Andrew O. Finley, Sudipto Banerjee & Bruce D. Cook
Spatial misalignment occurs when at least one of multiple outcome variables is missing at an observed location. For spatial data, prediction of these missing observations should be informed by within location association among outcomes and by proximate locations where measurements were recorded. This study details and illustrates a Bayesian regression framework for modelling spatially misaligned multivariate data. Particular attention is paid to developing valid probability models capable of estimating parameter posterior distributions and propagating uncertainty...

Data from: Host social behavior decreases exposure to vector-borne disease: a field experiment in a “hotspot” of West Nile virus transmission

Bethany L. Krebs, Tavis K. Anderson, Tony L. Goldberg, Gabriel L. Hamer, Uriel D. Kitron, Christina M. Newman, Marilyn O. Ruiz, Edward D. Walker & J. D. Brawn
Animals can decrease their individual risk of predation by forming groups. The encounter-dilution hypothesis extends the potential benefits of gregariousness to biting insects and vector-borne disease by predicting that the per capita number of insect bites should decrease within larger host groups. Although vector-borne diseases are common and can exert strong selective pressures on hosts, there have been few tests of the encounter-dilution effect in natural systems. We conducted an experimental test of the encounter-dilution...

Data from: Implications of the circumpolar genetic structure of polar bears for their conservation in a rapidly warming Arctic

Elizabeth Peacock, Sarah A. Sonsthagen, Martyn E. Obbard, Andrei Boltunov, Eric V. Regehr, Nikita Ovsyanikov, Jon Aars, Stephen N. Atkinson, George K. Sage, Andrew G. Hope, Eve Zeyl, Lutz Bachmann, Dorothee Ehrich, Kim T. Scribner, Steven C. Amstrup, Stanislav Belikov, Erik W. Born, Andrew E. Derocher, Ian Stirling, Mitchell K. Taylor, Øystein Wiig, David Paetkau & Sandra L. Talbot
We provide an expansive analysis of polar bear (Ursus maritimus) circumpolar genetic variation during the last two decades of decline in their sea-ice habitat. We sought to evaluate whether their genetic diversity and structure have changed over this period of habitat decline, how their current genetic patterns compare with past patterns, and how genetic demography changed with ancient fluctuations in climate. Characterizing their circumpolar genetic structure using microsatellite data, we defined four clusters that largely...

Data from: The potential influence of morphology on the evolutionary divergence of an acoustic signal.

William R. Pitchers, Chris P. Klingenberg, Tom Tregenza, John Hunt & Ian Dworkin
The evolution of acoustic behaviour and that of the morphological traits mediating its production are often coupled. Lack of variation in the underlying morphology of signalling traits has the potential to constrain signal evolution. This relationship is particularly likely in field crickets, where males produce acoustic advertisement signals to attract females by stridulating with specialized structures on their forewings. In this study, we characterize the size and geometric shape of the forewings of males from...

Data from: Gape-limited predators as agents of selection on the defensive morphology of an invasive invertebrate

Andrea L. J. Miehls, Scott D. Peacor & Andrew G. McAdam
Invasive species have widespread and pronounced effects on ecosystems and adaptive evolution of invaders is often considered responsible for their success. Despite the potential importance of adaptation to invasion, we still have limited knowledge of the agents of natural selection on invasive species. Bythotrephes longimanus, a cladoceran zooplankton, invaded multiple Canadian Shield lakes over the past several decades. Bythotrephes have a conspicuous caudal process (tail spine) that provides a morphological defense against fish predation. We...

Data from: Flowering time QTL in natural populations of Arabidopsis thaliana and implications for their adaptive value

Emily L. Dittmar, Christopher G. Oakley, Jon Ågren & Douglas W. Schemske
The genetic basis of phenotypic traits is of great interest to evolutionary biologists, but their contribution to adaptation in nature is often unknown. To determine the genetic architecture of flowering time in ecologically relevant conditions, we used a recombinant inbred line population created from two locally adapted populations of Arabidopsis thaliana from Sweden and Italy. Using these RILs, we identified flowering time QTL in growth chambers that mimicked the natural temperature and photoperiod variation across...

Data from: Large chromosomal rearrangements during a long-term evolution experiment with Escherichia coli

Colin Raeside, Joël Gaffé, Daniel E. Deatherage, Olivier Tenaillon, Adam M. Briska, Ryan N. Ptashkin, Stéphane Cruveiller, Claudine Médigue, Richard E. Lenski, Jeffrey E. Barrick & Dominique Schneider
Large-scale rearrangements may be important in evolution because they can alter chromosome organization and gene expression in ways not possible through point mutations. In a long-term evolution experiment, twelve Escherichia coli populations have been propagated in a glucose-limited environment for over 25 years. We used whole-genome mapping (optical mapping) combined with genome sequencing and PCR analysis to identify the large-scale chromosomal rearrangements in clones from each population after 40,000 generations. A total of 110 rearrangement...

Data from: Comparative transcriptome atlases reveal altered gene expression modules between two Cleomaceae C3 and C4 plant species

Canan Külahoglu, Manuel Sommer, Janina Maß, Simon Schliesky, Barbara Berckmans, Elsa Gongora-Castillo, C. Robin Buell, Rüdiger Simon, Lieven De Veylder, Andrea Bräutigam, Andreas P. M. Weber, Alisandra K. Denton & Thomas J. Wrobel
C4 photosynthesis outperforms the ancestral C3 state in a wide range of natural and agro-ecosystems by affording higher water-use and nitrogen-use efficiencies. It therefore represents a prime target for engineering novel, high-yielding crops by introducing the trait into C3 backgrounds. However, the genetic architecture of C4 photosynthesis remains largely unknown. To define the divergence in gene expression modules between C3 and C4 photosynthesis during leaf ontogeny, we generated comprehensive transcriptome atlases of two Cleomaceae species,...

Data from: Transcriptome analysis indicates considerable divergence in alternative splicing between duplicated genes in Arabidopsis thaliana

David C. Tack, William R. Pitchers & Keith L. Adams
Gene and genome duplication events have created a large number of new genes in plants that can diverge by evolving new expression profiles and functions (neofunctionalization) or dividing extant ones (subfunctionalization). Alternative splicing (AS) generates multiple types of mRNA from a single type of pre-mRNA by differential intron splicing. It can result in new protein isoforms or down-regulation of gene expression by transcript decay. Using RNA-seq we investigated the degree to which alternative splicing patterns...

Data from: Gene amplification of 5-enol-pyruvylshikimate-3-phosphate synthase in glyphosate-resistant Kochia scoparia

Andrew T. Wiersma, Todd A. Gaines, Christopher Preston, John P. Hamilton, Darci Giacomini, C. Robin Buell, Jan E. Leach & Philip Westra
The widely used herbicide glyphosate inhibits the shikimate pathway enzyme 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS). Globally, the intensive use of glyphosate for weed control has selected for glyphosate resistance in 31 weed species. Populations of suspected glyphosate-resistant Kochia scoparia were collected from fields located in the US central Great Plains. Glyphosate dose response verified glyphosate resistance in nine populations. The mechanism of resistance to glyphosate was investigated using targeted sequencing, quantitative PCR, immunoblotting, and whole transcriptome de...

Data from: Multi-scaled drivers of ecosystem state: quantifying the importance of the regional spatial scale

Kendra S. Cheruvelil, Patricia A. Soranno, Katherine E. Webster & Mary T. Bremigan
The regional spatial scale is a vital linkage for the informed extrapolation of results from local to continental scales to address broad-scale environmental problems. Among-region variation in ecosystem state is commonly accounted for by using a regionalization framework, such as an ecoregion classification. Rarely have alternative regionalization frameworks been tested for variables measuring ecosystem state, nor have the underlying relationships with the variables that are used to define them been assessed. In this study, we...

Data from: Generation of transcript assemblies and identification of single nucleotide polymorphisms from seven lowland and upland cultivars of switchgrass

Kevin L. Childs, Aruna Nandety, Candice N. Hirsch, Elsa Góngora-Castillo, Jeremy Schmutz, Shawn M. Kaeppler, Michael D. Casler & C. Robin Buell
Switchgrass (Panicum virgatum) is a North American perennial prairie species that has been used as a rangeland and forage crop and has recently been targeted as a potential biofuel feedstock species. Switchgrass, which occurs as tetraploid and octoploid forms, is classified into lowland or upland ecotypes that differ in growth phenotypes and adaptation to distinct habitats. Using RNA-sequencing reads derived from crown, young shoot and leaf tissues, we generated sequence data from seven switchgrass cultivars,...

Data from: The evolutionary origin of somatic cells under the dirty work hypothesis

Heather J. Goldsby, David B. Knoester, Charles Ofria & Benjamin Kerr
Reproductive division of labor is a hallmark of multicellular organisms. However, the evolutionary pressures that give rise to delineated germ and somatic cells remain unclear. Here we propose a hypothesis that the mutagenic consequences associated with performing metabolic work favor such differentiation. We present evidence in support of this hypothesis gathered using a computational form of experimental evolution. Our digital organisms begin each experiment as undifferentiated multicellular individuals, and can evolve computational functions that improve...

Data from: Insights into the maize pan-genome and pan-transcriptome

Candice N. Hirsch, Jillian M. Foerster, James M. Johnson, Rajandeep S. Sekhon, German Muttoni, Brieanne Vaillancourt, Francisco Peñagaricano, Erika Lindquist, Mary Ann Pedraza, Kerrie Barry, Natalia De Leon, Shawn M. Kaeppler & C. Robin Buell
Genomes at the species level are dynamic, with genes present in every individual (core) and genes in a subset of individuals (dispensable) that collectively constitute the pan-genome. Using transcriptome sequencing of seedling RNA from 503 maize (Zea mays) inbred lines to characterize the maize pan-genome, we identified 8681 representative transcript assemblies (RTAs) with 16.4% expressed in all lines and 82.7% expressed in subsets of the lines. Interestingly, with linkage disequilibrium mapping, 76.7% of the RTAs...

Data from: Coordination of wing and whole body development at developmental milestones ensures robustness against environmental and physiological perturbations

Marisa M. Oliveira, Alexander W. Shingleton & Christen K. Mirth
Development produces correctly patterned tissues under a wide range of conditions that alter the rate of development in the whole body. We propose two hypotheses through which tissue patterning could be coordinated with whole body development to generate this robustness. Our first hypothesis states that tissue patterning is tightly coordinated with whole body development over time. The second hypothesis is that tissue patterning aligns at developmental milestones. To distinguish between our two hypotheses, we developed...

Data from: Coevolution drives the emergence of complex traits and promotes evolvability

Luis Zaman, Justin R. Meyer, Suhas Devangam, David M. Bryson, Richard E. Lenski & Charles Ofria
The evolution of complex organismal traits is obvious as a historical fact, but the underlying causes—including the role of natural selection—are contested. Gould argued that a random walk from a necessarily simple beginning would produce the appearance of increasing complexity over time. Others contend that selection, including coevolutionary arms races, can systematically push organisms toward more complex traits. Methodological challenges have largely precluded experimental tests of these hypotheses. Using the Avida platform for digital evolution,...

Registration Year

  • 2014

Resource Types

  • Dataset


  • Michigan State University
  • University of Wisconsin-Madison
  • California State University, Northridge
  • University of Minnesota
  • Great Lakes Bioenergy Research Center
  • University of Oklahoma
  • Lawrence Berkeley National Laboratory
  • Indiana University Bloomington
  • Inserm
  • University of Florida