148 Works

Data from: Limited influence of local and landscape factors on finescale gene flow in two pond-breeding amphibians

Stephanie S. Coster, Kimberly J. Babbitt, Andrew Cooper & Adrienne I. Kovach
Dispersal and gene flow within animal populations are influenced by the composition and configuration of the landscape. In this study, we evaluated hypotheses about the impact of natural and anthropogenic factors on genetic differentiation in two amphibian species, the spotted salamander (Ambystoma maculatum) and the wood frog (Lithobates sylvaticus) in a commercial forest in central Maine. We conducted this analysis at two scales: a local level, focused on factors measured at each breeding pond and...

Data from: Ocean circulation model predicts high genetic structure in a long-lived pelagic developer

Jennifer M. Sunday, Iva Popovic, Wendy J. Palen, Michael G. G. Foreman & Michael W. Hart
Understanding the movement of genes and individuals across marine seascapes is a long-standing challenge in marine ecology, and can inform our understanding of local adaptation, the persistence and movement of populations, and the spatial scale of effective management. Patterns of gene flow in the ocean are often inferred based on population genetic analyses coupled with knowledge of species’ dispersive life histories. However, genetic structure is the result of time-integrated processes, and may not capture present-day...

Data from: A molecular genetic time scale demonstrates Cretaceous origins and multiple diversification rate shifts within the order Galliformes (Aves)

R. Will Stein, Joseph W. Brown & Arne Ø. Mooers
The phylogeny of Galliformes (landfowl) has been studied extensively; however, the associated chronologies have been criticized recently due to misplaced or misidentified fossil calibrations. As a consequence, it is unclear whether any crown-group lineages arose in the Cretaceous and survived the Cretaceous–Paleogene (K–Pg; 65.5 Ma) mass extinction. Using Bayesian phylogenetic inference on an alignment spanning 14,539 bp of mitochondrial and nuclear DNA sequence data, four fossil calibrations, and a combination of uncorrelated lognormally distributed relaxed-clock...

Data from: The evolutionary relationships and age of Homo naledi: an assessment using dated Bayesian phylogenetic methods

Mana Dembo, Davorka Radovčić, Heather M. Garvin, Myra F. Laird, Lauren Schroeder, Jill E. Scott, Juliet Brophy, Rebecca R. Ackermann, Charles M. Musiba, Darryl J. De Ruiter, Arne Ø. Mooers, Mark Collard & Chares M. Musiba
Homo naledi is a recently discovered species of fossil hominin from South Africa. A considerable amount is already known about H. naledi but some important questions remain unanswered. Here we report a study that addressed two of them: “Where does H. naledi fit in the hominin evolutionary tree?” and “How old is it?” We used a large supermatrix of craniodental characters for both early and late hominin species and Bayesian phylogenetic techniques to carry out...

Data from: Episodic radiations in the fly tree of life

Brian M. Wiegmann, Michelle D. Trautwein, Isaac S. Winkler, Norman B. Barr, Jung-Wook Kim, Christine Lambkin, Matthew A. Bertone, Brian K. Cassel, Keith M. Bayless, Alysha M. Heimberg, Benjamin M. Wheeler, Kevin J. Peterson, Thomas Pape, Bradley J. Sinclair, Jeffrey H. Skevington, Vladimir Blagoderov, Jason Caravas, Sujatha Narayanan Kutty, Urs Schmidt-Ott, Gail E. Kampmeier, F. Christian Thompson, David A. Grimaldi, Andrew T. Beckenbach, Gregory W. Courtney, Markus Friedrich … & J.-W. Kim
Flies are one of four superradiations of insects (along with beetles, wasps, and moths) that account for the majority of animal life on Earth. Diptera includes species known for their ubiquity (Musca domestica house fly), their role as pests (Anopheles gambiae malaria mosquito), and their value as model organisms across the biological sciences (Drosophila melanogaster). A resolved phylogeny for flies provides a framework for genomic, developmental, and evolutionary studies by facilitating comparisons across model organisms,...

Data from: Are there synergistic or antagonistic effects of multiple maternally-derived egg components (antibodies and testosterone) on offspring phenotype?

Roxana Torres, Eunice Chin, Rowan Rampton & Tony D. Williams
Eggs are multivariate in that they contain multiple maternally-derived egg components (e.g. hormones, antibodies, mRNA, antioxidants) which are thought to influence offspring phenotype. However, most studies have focused on single egg components and on short-term effects. Here, we simultaneously manipulated two egg components, maternally-derived antibodies (MAb) and yolk testosterone (T) to assess potential synergistic or antagonistic effects on offspring phenotype from hatching to sexual maturity. We found no evidence for short-or long-term effects of either...

Life history and environment predict variation in testosterone across vertebrates

Jerry Husak, Matthew Fuxjager, Michele A. Johnson, Maren Vitousek, Jeremy Donald, Clinton David Francis, Wolfgang Goymann, Michaela Hau, Bonnie Kircher, Rosemary Knapp, Lynn B. Martin, Eliot Miller, Laura Schoenle & Tony Williams
Endocrine systems act as key intermediaries between organisms and their environments. This interaction leads to high variability in hormone levels, but we know little about the ecological factors that influence this variation within and across major vertebrate groups. We study this topic by assessing how various social and environmental dynamics influence testosterone levels across the entire vertebrate tree of life. Our analyses show that breeding season length and mating system are the strongest predictors of...

Zostera marina microsatellite and environmental data

Erin Foster, Jane Watson, Matthew Lemay, Tim Tinker, James Estes, Rebecca Piercey, Lauren Henson, Carol Ritland, Allyson Miscampbell, Linda Nichol, Margot Hessing-Lewis, Anne Salomon & Chris Darimont
Microsatellite data for Zostera marina, sea otter occupancy information, and environmental data from the west coast of British Columbia, Canada.

Data from: Indigenous knowledge of key ecological processes confers resilience to a small-scale kelp fishery

Hannah Kobluk, Keith Gladstone, Mike Reid, Kelly Brown, Kira Krumhansl & Anne Salomon
1. Feedbacks between social and ecological processes can lead to sustainable stewardship practices that support ecological resilience among harvested populations. This is evident along the world’s coast lines, where Indigenous knowledge systems have facilitated millennia of human nature coexistence. However, social-ecological conditions globally are quickly shifting, posing challenges for coastal Indigenous communities where customary harvest of ocean resources, such as kelps, need to adapt to growing markets, novel climates and changing governance regimes. Consequently, a...

Earlier and slower or later and faster: Spring migration pace linked to departure time in a Neotropical migrant songbird

Ana M. González-Prieto, Nicholas J. Bayly & Keith A. Hobson
1. Migratory birds travel vast distances and the timing of migratory flights can affect survival and the ability to reproduce. For Neotropical migrant songbirds, early spring departure from wintering sites, early arrival to the breeding grounds and higher reproductive success have been related to the use of suitable habitats and environmental conditions during the non-breeding season. However, how migratory strategies are shaped by winter habitat choice is largely unknown due to the general inability to...

Data from: Convergent evolution of niche structure in Northeast Pacific kelp forests

Samuel Starko, Kyle Demes, Christopher Neufeld & Patrick Martone
Much of the morphological and ecological diversity present on earth is believed to have arisen through the process of adaptive radiation. Yet, this is seemingly at odds with substantial evidence that niches tend to be similar among closely related species (i.e., niche conservatism). Identifying the relative importance of these opposing processes in driving niche evolution under different circumstances is therefore essential to our understanding of the interaction between ecological and evolutionary phenomena. In this study,...

Data from: Riparian habitat restoration increases the availability and occupancy of Yellow-breasted Chat territories but brood parasitism is the primary influence on reproductive performance

Timothy Robert Forrester, David J. Green, René McKibbin, A. Michael Bezener & Christine A. Bishop
Implementation and evaluation of conservation efforts requires an understanding of the habitat selection and reproductive success of endangered populations. As populations recover, established territory holders may force new arrivals into lower-quality habitat, which can reduce reproductive success, especially in disturbed landscapes where suitable habitat is scarce. The endangered Western Yellow-breasted Chat (Icteria virens auricollis) population in the fragmented riparian zone of the Okanagan Valley, British Columbia, Canada, has rapidly increased in response to habitat restoration....

Code, data and supplementary material from: Analyzing phylogenetic trees with a tree lattice coordinate system and a graph polynomial

Pengyu Liu, Priscila Biller, Matthew Gould & Caroline Colijn
This dataset includes code, used and generated data for the experiments in the paper Analyzing Phylogenetic Trees with a Tree Lattice Coordinate System and a Graph Polynomial, and the supplementary material of the paper. The paper introduces representation and comparison methods for rooted unlabelled phylogenetic trees based on a tree lattice that serves as a coordinate system for rooted binary trees with branch lengths and a graph polynomial that fully characterizes tree shapes. The methods...

Vascular plant community surveys across different reindeer grazing regimes in the Fennoscandian tundra

Kate Gibson, Johan Oloffson, Arne Mooers & Melanie Monroe
This dataset contains data from the experiment described in "Gibson K., Olofsson, J. Mooers, A. Ø., & Monroe, M. J. (2021) Pulse grazing by reindeer (Rangifer tarandus) can increase the phylogenetic diversity of vascular plant communities in the Fennoscandian tundra. Ecology and Evolution. In press." The data is from a multi-year (2004-2007) quasi-experimental study in Northern Fennoscandia, which was designed to analyze the effect of reindeer grazing on vascular plant community diversity. Our study design...

Adoption of a New Payment Method: Theory and Experimental Evidence

Jasmina Arifovic, John Duffy & Janet Hua Jiang
We model the introduction of a new payment method, e.g., e-money, that competes with an existing payment method, e.g., cash. The new payment method involves relatively lower per-transaction costs for both buyers and sellers, but sellers must pay a fixed fee to accept the new payment method. As a result of the network effects, our model admits two symmetric pure strategy Nash equilibria. In one equilibrium, the new payment method is not adopted and all...

Scour Pool Incision in Bedrock Canyons

Eric Cao
Support data for M.Sc Thesis: Scour pool incision in bedrock canyons.

Scour pool incision in bedrock canyons

ZhiHao Cao
A flume experiment was conducted to investigate the effect of lateral constrictions on the initiation and evolution of scour pools in bedrock canyons. Results show that lateral constriction can initiate the formation of a scour pool. Deceleration of the flow upstream of the constricted canyon promotes alluviation, while flow acceleration through the canyon prevents a permanent sediment cover from developing. The elevation difference upstream and through the canyon causes flow and sediment to plunge towards...

in several times

Linnea Gwiazda
in several times is a choreography of space, memory and the body. Developed from personal stories, family history and nostalgic association, the work aims to create a place in which several times and environments can be remembered and acknowledged simultaneously. The process of creating this work began with a trip to spaces that held significance to my family, searching for traces of the past in the present, and the recollection of senses that connect my...

\"in several times\"

Linnea Gwiazda
in several times is a choreography of space, memory and the body. Developed from personal stories, family history and nostalgic association, the work aims to create a place in which several times and environments can be remembered and acknowledged simultaneously. The process of creating this work began with a trip to spaces that held significance to my family, searching for traces of the past in the present, and the recollection of senses that connect my...

M-PATH Project Dataset

Özge Nilay Yalçın
This collection includes the data used for the gesture rating experiments as a part of the M-Path project. For the MTurk experiment code, see: https://github.com/onyalcin/M-PATH/tree/master/MTurk_Experiments/Gesture%20Rating. Includes the trained models that are used in https://github.com/onyalcin/M-PATH.

Managing Adverse Dependence for Portfolios of Collateral in Financial Infrastructures

Alejandro Garcia & Ramazan Gençay
We propose a framework that allows a portfolio manager to quantify the probability of simultaneous losses in multiple assets of a collateral portfolio. Using this framework, we propose a methodology to conduct stress tests on the market value of the portfolio of collateral when undesirable extreme dependence occurs. This framework permits us to quantify the potential impact on the portfolio returns of systemic events that change, or 'break down', the historical comovement structure, imposing an...

Labour Markets, Liquidity, and Monetary Policy Regimes

David Andolfatto, Scott Hendry & Kevin Moran
We develop an equilibrium model of the monetary policy transmission mechanism that highlights information frictions in the market for money and search frictions in the market for labour. A change in monetary policy regime, modelled here as an exogenous reduction in the long-run target for the money-growth rate, results in a large and persistent increase in the interest rate owing to a persistent shortfall in liquidity. This persistent liquidity effect occurs because of the limited...

Data from: Exploring visual plasticity: dietary carotenoids can change color vision in guppies (Poecilia reticulata)

Benjamin A. Sandkam, Kerry A. Deere-Machemer, Ashley M. Johnson, Gregory F. Grether, F. Helen Rodd & Rebecca C. Fuller
Differences in color vision can play a key role in an organism’s ability to perceive and interact with the environment across a broad range of taxa. Recently, species have been shown to vary in color vision across populations as a result of differences in regulatory sequence and/or plasticity of opsin gene expression. For decades, biologists have been intrigued by among-population variation in color-based mate preferences of female Trinidadian guppies. We proposed that some of this...

Data from: Color vision varies more among populations than among species of live-bearing fish from South America

Benjamin A. Sandkam, C. Megan Young, Frances Margaret Walker Breden, Godfrey R. Bourne & Felix Breden
Background: Sensory Bias models for the evolution of mate preference place a great emphasis on the role of sensory system variation in mate preferences. However, the extent to which sensory systems vary across- versus within-species remains largely unknown. Here we assessed whether color vision varies in natural locations where guppies (Poecilia reticulata) and their two closest relatives, Poecilia parae and Poecilia picta, occur in extreme sympatry and school together. All three species base mate preferences...

Data from: Costs of reproduction explain the correlated evolution of semelparity and egg size: theory and a test with salmon

Douglas C. Braun, Holly K. Kindsvater, Sarah P. Otto & John D. Reynolds
Species’ life history traits, including maturation age, number of reproductive bouts, offspring size and number, reflect adaptations to diverse biotic and abiotic selection pressures. A striking example of divergent life histories is the evolution of either iteroparity (breeding multiple times) or semelparity (breed once and die). We analysed published data on salmonid fishes and found that semelparous species produce larger eggs, that egg size and number increase with salmonid body size among populations and species...

Registration Year

  • 2022
    11
  • 2021
    38
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    19
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    13
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    16
  • 2017
    10
  • 2016
    14
  • 2015
    8
  • 2014
    7
  • 2013
    5

Resource Types

  • Dataset
    128
  • Dissertation
    10
  • Text
    6
  • Audiovisual
    3
  • Journal Article
    1

Affiliations

  • Simon Fraser University
    148
  • University of British Columbia
    16
  • Fisheries and Oceans Canada
    7
  • University of Alberta
    6
  • Dalhousie University
    6
  • University of Minnesota
    5
  • University of Ottawa
    5
  • University of Victoria
    5
  • Florida State University
    5
  • University of Washington
    4