64 Works

Data from: Cline coupling and uncoupling in a stickleback hybrid zone

Timothy H. Vines, Anne C. Dalziel, Arianne Albert, Thor Veen, Patricia Marita Schulte, Dolph Schluter & Arianne Y. K. Albert
Strong ecological selection on a genetic locus can maintain allele frequency differences between populations in different environments, even in the face of hybridization. When alleles at divergent loci come into tight linkage disequilibrium, selection acts on them as a unit and can significantly reduce gene flow. For populations interbreeding across a hybrid zone, linkage disequilibria between loci can force clines to share the same slopes and centers. However, strong ecological selection on a locus can...

Data from: Memory for lectures: how lecture format impacts the learning experience

Trish L. Varao-Sousa & Alan Kingstone
The present study investigated what impact the presentation style of a classroom lecture has on memory, mind wandering, and the subjective factors of interest and motivation. We examined if having a professor lecturing live versus on video alters the learning experience of the students in the classroom. During the lectures, students were asked to report mind wandering and later complete a memory test. The lecture format was manipulated such that all the students received two...

Data from: Assessing conservation risks to populations of an anadromous Arctic salmonid, the northern Dolly Varden (Salvelinus malma malma), via estimates of effective and census population sizes and approximate Bayesian computation

Les N. Harris, Friso P. Palstra, Rob Bajno, Colin P. Gallagher, Kimberly L. Howland, Eric B. Taylor, James D. Reist & Robert Bajno
Census population size (Nc) is crucial to the development of resource management strategies, however, monitoring the effective population size (Ne) of managed populations has proliferated because of this parameter’s relationship to the short-term impacts of genetic stochasticity and long-term population viability. Thus, having a sound understanding of both Nc and Ne, including population connectivity, provides valuable insights into both the demographic and genetic risks to extinction. Here, we assessed microsatellite DNA variation in four (of...

Data from: The effects of food web structure on ecosystem function exceeds those of precipitation

M. Kurtis Trzcinski, Diane S. Srivastava, Bruno Corbara, Olivier Dézerald, Céline Leroy, Jean-François Carrias, Alain Dejean & Régis Céréghino
Ecosystems are being stressed by climate change, but few studies have tested food web responses to changes in precipitation patterns and the consequences to ecosystem function. Fewer still have considered whether results from one geographic region can be applied to other regions, given the degree of community change over large biogeographic gradients. We assembled, in one field site, three types of macroinvertebrate communities within water-filled bromeliads. Two represented food webs containing both a fast filter...

Data from: Evolutionary potential in the Alpine: trait heritabilities and performance variation of the dwarf willow Salix herbacea from different elevations and microhabitats

Janosch Sedlacek, Andrés J. Cortés, Julia Wheeler, Oliver Bossdorf, Guenter Hoch, Jaroslav Klápště, Christian Lexer, Christian Rixen, Sonja Wipf, Sophie Karrenberg & Mark Van Kleunen
Alpine ecosystems are seriously threatened by climate change. One of the key mechanisms by which plants can adapt to changing environmental conditions is through evolutionary change. However, we still know little about the evolutionary potential in wild populations of long-lived alpine plants. Here, we investigated heritabilities of phenological traits, leaf size, and performance traits in natural populations of the long-lived alpine dwarf shrub Salix herbacea using relatedness estimates inferred from SSR (Simple Sequence Repeat) markers....

Data from: Resource selection and landscape change reveal mechanisms suppressing population recovery for the world's most endangered antelope

Abdullahi H. Ali, Adam T. Ford, Jeffrey S. Evans, David P. Mallon, Matthew M. Hayes, Juliet King, Rajan Amin & Jacob R. Goheen
Understanding how bottom-up and top-down forces affect resource selection can inform restoration efforts. With a global population size of <500 individuals, the hirola Beatragus hunteri is the world's most endangered antelope, with a declining population since the 1970s. While the underlying mechanisms are unclear, some combination of habitat loss and predation are thought to be responsible for low abundances of contemporary populations. Efforts to conserve hirola are hindered by a lack of understanding as to...

Data from: Phylogenomics from whole genome sequences using aTRAM

Julie M. Allen, Bret Boyd, Nam-Phuong Nguyen, Pranjal Vachaspati, Tandy Warnow, Daisie I. Huang, Patrick G. S. Grady, Kayce C. Bell, Quentin C.B. Cronk, Lawrence Mugisha, Barry R. Pittendrigh, M. Soledad Leonardi, David L. Reed & Kevin P. Johnson
Novel sequencing technologies are rapidly expanding the size of data sets that can be applied to phylogenetic studies. Currently the most commonly used phylogenomic approaches involve some form of genome reduction. While these approaches make assembling phylogenomic data sets more economical for organisms with large genomes, they reduce the genomic coverage and thereby the long-term utility of the data. Currently, for organisms with moderate to small genomes (<1000 Mbp) it is feasible to sequence the...

Data from: Direct and indirect genetic and fine-scale location effects on breeding date in song sparrows

Ryan R. Germain, Matthew E. Wolak, Peter Arcese, Sylvain Losdat & Jane M. Reid
Quantifying direct and indirect genetic effects of interacting females and males on variation in jointly expressed life-history traits is central to predicting microevolutionary dynamics. However, accurately estimating sex-specific additive genetic variances in such traits remains difficult in wild populations, especially if related individuals inhabit similar fine-scale environments. Breeding date is a key life-history trait that responds to environmental phenology and mediates individual and population responses to environmental change. However, no studies have estimated female (direct)...

Data from: Direct and indirect effects of native range expansion on soil microbial community structure and function

Courtney G. Collins, Chelsea J. Carey, Emma L. Aronson, Christopher W. Kopp & Jeffrey M. Diez
Analogous to the spread of non-native species, shifts in native species’ ranges resulting from climate and land use change are also creating new combinations of species in many ecosystems. These native range shifts may be facilitated by similar mechanisms that provide advantages for non-native species and may also have comparable impacts on the ecosystems they invade. Soil biota, in particular bacteria and fungi, are important regulators of plant community composition and below-ground ecosystem function. Compared...

Data from: Rapid evolution accelerates plant population spread in fragmented experimental landscapes

Jennifer L. Williams, Bruce E. Kendall & Jonathan M. Levine
Predicting the speed of biological invasions and native species migrations requires an understanding of the ecological and evolutionary dynamics of spreading populations. Theory predicts that evolution can accelerate species’ spread velocity, but how landscape patchiness—an important control over traits under selection—influences this process is unknown. We manipulated the response to selection in populations of a model plant species spreading through replicated experimental landscapes of varying patchiness. After six generations of change, evolving populations spread 11%...

Data from: Morphological identification and single-cell genomics of marine diplonemids

Ryan M. R. Gawryluk, Javier Del Campo, Noriko Okamoto, Jurgen F. H. Strassert, Julius Lukes, Thomas A. Richards, Alexandra Z. Worden, Alyson E. Santoro & Patrick J. Keeling
Recent global surveys of marine biodiversity have revealed that a group of organisms known as “marine diplonemids” constitutes one of the most abundant and diverse planktonic lineages [1]. Though discovered over a decade ago [2 and 3], their potential importance was unrecognized, and our knowledge remains restricted to a single gene amplified from environmental DNA, the 18S rRNA gene (small subunit [SSU]). Here, we use single-cell genomics (SCG) and microscopy to characterize ten marine diplonemids,...

Data from: Maternal stress has divergent effects on gene expression patterns in the brains of male and female threespine stickleback

David C.H. Metzger, Patricia M. Schulte & David C. H. Metzger
Maternal stress can have long-term effects on neurodevelopment that can influence offspring performance and population evolutionary trajectories. To examine the mechanistic basis for these neurodevelopmental effects of maternal stress, we used RNA-seq to assess differential gene expression across the brain transcriptome of adult male and female threespine stickleback (Gasterosteus aculeatus) from stressed and unstressed mothers. We identified sexually divergent effects of maternal stress on the brain transcriptome. In males, genes that were up-regulated by maternal...

Data from: Weak coordination between leaf structure and function among closely related tomato species

Christopher D. Muir, Miquel À. Conesa, Emilio J. Roldán, Arántzazu Molins & Jeroni Galmés
Theory predicts that natural selection should favor coordination between leaf physiology, biochemistry and anatomical structure along a functional trait spectrum from fast, resource-acquisitive syndromes to slow, resource-conservative syndromes. However, the coordination hypothesis has rarely been tested at a phylogenetic scale most relevant for understanding rapid adaptation in the recent past or for the prediction of evolutionary trajectories in response to climate change. We used a common garden to examine genetically based coordination between leaf traits...

Data from: Eye and head movements are complementary in visual selection

Grayden J. F. Solman, Thomas Foulsham, Alan Kingstone & Tom Foulsham
In the natural environment, visual selection is accomplished by a system of nested effectors, moving the head and body within space and the eyes within the visual field. However, it is not yet known if the principles of selection for these different effectors are the same or different. We used a novel gaze-contingent display in which an asymmetric window of visibility (a horizontal or vertical slot) was yoked to either head or eye position. Participants...

Data from: Fixation probability in a haploid-diploid population

Kazuhiro Bessho & Sarah P. Otto
Classical population genetic theory generally assumes either a fully haploid or fully diploid life cycle. However, many organisms exhibit more complex life cycles, with both free-living haploid and diploid stages. Here we ask what the probability of fixation is for selected alleles in organisms with haploid-diploid life cycles. We develop a genetic model that considers the population dynamics using both the Moran model and Wright-Fisher model. Applying a branching process approximation, we obtain an accurate...

Data from: Convergent local adaptation to climate in distantly related conifers

Sam Yeaman, Kathryn A. Hodgins, Katie E. Lotterhos, Haktan Suren, Simon Nadeau, Kristin A. Nurkowski, Pia Smets, Tongli Wang, Laura K. Gray, Katharina J. Liepe, Andreas Hamann, Jason A. Holliday, Michael C. Whitlock, Loren H. Rieseberg & Sally N. Aitken
When confronted with an adaptive challenge, such as extreme temperature, closely related species frequently evolve similar phenotypes using the same genes. Although such repeated evolution is thought to be less likely in highly polygenic traits and distantly related species, this has not been tested at the genome scale. We performed a population genomic study of convergent local adaptation among two distantly related species, lodgepole pine and interior spruce. We identified a suite of 47 genes,...

Data from: Sockeye salmon repatriation leads to population re-establishment and rapid introgression with native kokanee

Andrew J. Veale & Michael A. Russello
Re-establishing salmonid populations to areas historically occupied has substantial potential for conservation gains, however, such interventions also risk negatively impacting native resident stocks. Here, we assessed the success of the hatchery-assisted reintroduction of anadromous sockeye salmon (Oncorhynchus nerka) into Skaha Lake, British Columbia, Canada, and evaluated the genetic consequences for native kokanee, a freshwater-obligate ecotype, using single nucleotide polymorphism genotypic data collected from reference samples of spawning Okanagan River sockeye and Skaha Lake kokanee pre-sockeye...

Data from: Rapid adaptive evolution of colour vision in the threespine stickleback radiation

Diana J. Rennison, Gregory L. Owens, Nancy Heckman, Dolph Schluter & Thor Veen
Vision is a sensory modality of fundamental importance for many animals, aiding in foraging, detection of predators, and mate choice. Adaptation to local ambient light conditions is thought to be commonplace, and a match between spectral sensitivity and light spectrum is predicted. We use opsin gene expression to test for local adaptation and matching of spectral sensitivity in multiple independent lake populations of threespine stickleback populations derived since the last ice age from an ancestral...

Data from: Origins of food crops connect countries worldwide

Colin K. Khoury, Harold A. Achicanoy, Anne D. Bjorkman, Carlos Navarro-Racines, Luigi Guarino, Ximena Flores-Palacios, Johannes M. M. Engels, John H. Wiersema, Hannes Dempewolf, Steven Sotelo, Julian Ramírez-Villegas, Nora P. Castañeda Álvarez, Cary Fowler, Andy Jarvis, Loren H. Rieseberg & Paul C. Struik
Research into the origins of food plants has led to the recognition that specific geographical regions around the world have been of particular importance to the development of agricultural crops. Yet the relative contributions of these different regions in the context of current food systems have not been quantified. Here we determine the origins (‘primary regions of diversity’) of the crops comprising the food supplies and agricultural production of countries worldwide. We estimate the degree...

Data from: Mitochondrial genotype and phenotypic plasticity of gene expression in response to cold acclimation in killifish

Timothy M. Healy, Heather J. Bryant & Patricia M. Schulte
Adjustments of aerobic metabolic processes are critical components of organismal responses to environmental change that require tight co-ordination between the nuclear and mitochondrial genomes. Intraspecific differences in mitochondrial genotype can affect gene transcription in both genomes. Thus, variation in mitochondrial genotype may be associated with differences in the plasticity of gene expression when organisms are faced with changes in environmental conditions. Cold acclimation is known to result in metabolic responses involving increases in mitochondrial amount...

Data from: Large benefits to marine fisheries of meeting the 1.5°C global warming target

William W. L. Cheung, Gabriel Reygondeau & Thomas L. Froelicher
Translating the Paris Agreement to limit global warming to 1.5°C above preindustrial level into impact-related targets facilitates communication of the benefits of mitigating climate change to policy-makers and stakeholders. Developing ecologically relevant impact-related targets for marine ecosystem services, such as fisheries, is an important step. Here, we use maximum catch potential and species turnover as climate-risk indicators for fisheries. We project that potential catches will decrease by more than 3 million metric tons per degree...

Data from: Spartina alterniflora genotypic identity affects plant and consumer responses in an experimental marsh community

Robyn A. Zerebecki, Gregory M. Crutsinger & A. Randall Hughes
1. Competition and herbivory are ubiquitous processes known to interactively shape plant performance, distribution and community assembly. Likewise, plant genetic variation and associated trait differences can impact both plant-plant and plant-herbivore interactions individually, yet few studies have explored these interactions simultaneously. 2. Salt marsh communities are an ideal system to study these questions, as they are dominated along the Atlantic and Gulf coasts of the United States by a foundation plant species, Spartina alterniflora, with...

Data from: Feather melanin and micro-structure variation in dark-eyed junco (Junco hyemalis) across an elevational gradient in the Selkirk Mountains

Devin R. De Zwaan, Jennifer L. Greenwood & Kathy Martin
Variation in feather melanism and microstructure can arise through sexual selection and ecological functional drivers. Melanin-based plumage traits are associated with sexual dichromatism and the intensity of sexual selection in many avian species, but also have several ecological benefits such as protection against ultra-violet (UV) radiation, camouflage, and feather strength. Additionally, feather microstructure influences thermoregulation. Plumage variation across species is well documented; however, the relative role of sexual selection and ecological drivers in intra-specific and...

Data from: Assessing reproductive isolation using a contact zone between parapatric lake-stream stickleback ecotypes

Dieta Hanson, Jean-Sébastien Moore, Eric B. Taylor, Rowan D.H. Barrett, Andrew P. Hendry, J.-S. Moore & R. D. H. Barrett
Ecological speciation occurs when populations evolve reproductive isolation as a result of divergent natural selection. This isolation can be influenced by many potential reproductive barriers, including selection against hybrids, selection against migrants, and assortative mating. How and when these barriers act and interact in nature is understood for relatively few empirical systems. We used a mark-recapture experiment in a contact zone between lake and stream three-spined sticklebacks (Gasterosteus aculeatus, Linnaeus) to evaluate the occurrence of...

Data from: Geographic shifts in the effects of habitat size on trophic structure and decomposition

Robin M. LeCraw, Gustavo Q. Romero & Diane S. Srivastava
Habitat size is known to affect community structure and ecosystem function, but few studies have examined the underlying mechanisms over sufficient size gradients or in enough geographic contexts to determine their generality. Our goal in this study was to determine if the relationship between habitat size and leaf decomposition varied across geographic sites, and which factors may be driving the differences. We conducted replicated observations in a coastal forest in Brazil, and in rainforests in...

Registration Year

  • 2016
    64

Resource Types

  • Dataset
    64

Affiliations

  • University of British Columbia
    64
  • Indiana University Bloomington
    6
  • The University of Texas at Austin
    3
  • French National Centre for Scientific Research
    3
  • University of Vienna
    3
  • University of California System
    2
  • University of Alberta
    2
  • University of Aberdeen
    2
  • University of Minnesota
    2
  • United States Department of Agriculture
    2