148 Works

Custom MALDI-TOF Mass Spectrometric Database for identification of environmental Burkholderia and related genera

Roger Linington
Success of microbial natural products discovery programs is dependent on quick and concise discrimination between isolates from diverse environments. However, laboratory isolation and identification of priority genera using current 16S rRNA PCR-based methods is both challenging and time-consuming. In clinical settings, MALDI-TOF MS is used to rapidly identify unknown bacterial pathogens, yet this has not been widely adapted for isolation of environmental bacteria. To expedite isolation of Gram-negative proteobacterial order Burkholderiales, we have created a...

Barn Swallow (Hirundo rustica) fledglings use crop habitat more frequently in relation to its availability than pasture and other habitat types

Chloe Boynton
Populations of birds that forage on aerial insects have been declining across North America for several decades, but the main causes of and reasons for geographical variation in these declines remains unclear. We examined the habitat use and survival of post-fledging Barn Swallows (Hirundo rustica), near Vancouver, BC, Canada using VHF radio telemetry. We predicted that fledgling Barn Swallows hatched in higher quality natal habitat (pasture) would fledge at higher quality, stay closest to the...

Predicting the effects of reservoir water level management on the reproductive output of a riparian songbird

David Green
Yellow warblers were monitored in Revelstoke, British Columbia, Canada for 12 breeding seasons spanning 2005 to 2017. Data on the breeding biology of individually marked warblers was used to construct an individual-based model describing the effects of reservoir operations on the reproductive output of yellow warblers. This model was parameterised using data on the breeding biology of approximately 30 breeding pairs per year that a provided data on nest sites (ground elevation and nest height),...

Data from: Watershed classification predicts streamflow regime and organic carbon dynamics in the Northeast Pacific Coastal Temperate Rainforest

Ian Giesbrecht, Suzanne Tank, Gordon Frazer, Eran Hood, Santiago Gonzalez Arriola, David Butman, Dave D'Amore, David Hutchinson, Allison Bidlack & Ken Lertzman
Watershed classification has long been a key tool in the hydrological sciences, but few studies have been extended to biogeochemistry. We developed a combined hydro-biogeochemical classification for watersheds draining to the coastal margin of the Northeast Pacific coastal temperate rainforest (1,443,062 km2), including 2,695 small coastal rivers (SCR) and 10 large continental watersheds. We used cluster analysis to group SCR watersheds into 12 types, based on watershed properties. The most important variables for distinguishing SCR...

rhinoceros auklet microsatellite data

Theresa Burg, Marie Prill, Katharine Studholme, Alice Domalik, Strahan Tucker, Catherine Jardine, Mark Maftei, Kenneth Wright, Jesse Beck, Russell Bradley, Ryan Carle, Thomas Good, Scott Hatch, Peter Hodum, Motohiro Ito, Scott Pearson, Nora Rojek, Leslie Slater, Yutaka Watanuki, Alexis Will, Aidan Bindoff, Glenn Crossin, Mark Drever & Mark Hipfner
We tested the hypothesis that segregation in wintering areas promotes population differentiation in a sentinel North Pacific seabird, the rhinoceros auklet (Cerorhinca monocerata). We collected tissue samples for genetic analyses on five breeding colonies in the western Pacific Ocean (Japan) and 13 in the eastern Pacific Ocean (California to Alaska), and deployed light-level geologgers on 12 eastern Pacific colonies to delineate wintering areas. Loggers were deployed previously on one colony in Japan. There was strong...

Marbled Murrelets prefer stratified waters close to freshwater inputs in Haida Gwaii, BC, Canada

Sonya Pastran, Mark Drever & David Lank
The Marbled Murrelet (Brachyramphus marmoratus) is a small seabird that is currently listed as threatened in Canada. Understanding this species’ marine habitat preferences plays a vital role in our ability to focus conservation planning. We used the longest-running at-sea survey dataset available in British Columbia to examine hotspot persistence and habitat use at Laskeek Bay, Haida Gwaii, BC. The Laskeek Bay Conservation Society has been conducting spring and summer surveys along fixed transect routes in...

Data from: Potential effects of an invasive bivalve, Nuttallia obscurata, on select sediment attributes within the intertidal region of coastal British Columbia

Kayi Chan & L.I. Bendell
On the west coast of British Columbia, Canada, the varnish clam, Nuttallia obscurata, is a rapidly spreading invasive species that can reach high densities (i.e. 800 individuals m− 2). A field survey (Tier I) and an in situ mesocosm density manipulation experiment (Tier II) were applied to determine the potential effects of this invasive bivalve on select sediment attributes within the intertidal zone. In situ experiments involved seeding 1 m2 mesocosms with varnish clams at...

Data from: Salmonid species diversity predicts salmon consumption by terrestrial wildlife

Christina N. Service, Andrew W. Bateman, Megan S. Adams, Kyle A. Artelle, Thomas E. Reimchen, Paul C. Paquet & Chris T. Darimont
1. Resource waves - spatial variation in resource phenology that extends feeding opportunities for mobile consumers - can affect the behaviour and productivity of recipient populations. Interspecific diversity among Pacific salmon species (Oncorhynchus spp.) creates staggered spawning events across space and time, thereby prolonging availability to terrestrial wildlife. 2. We aim to understand how such variation might influence consumption by terrestrial predators compared with resource abundance and intra- and inter- specific competition. 3. Using stable...

Data from: Transitions between phases of genomic differentiation during stick-insect speciation

Rüdiger Riesch, Moritz Muschick, Dorothea Lindtke, Romain Villoutreix, Aaron A. Comeault, Timothy E. Farkas, Kay Lucek, Elizabeth Hellen, Víctor Soria-Carrasco, Stuart R. Dennis, Clarissa F. De Carvalho, Rebecca J. Safran, Cristina P. Sandoval, Jeff Feder, Regine Gries, Bernard J. Crespi, Gerhard Gries, Zach Gompert & Patrik Nosil
Speciation can involve a transition from a few genetic loci that are resistant to gene flow to genome-wide differentiation. However, only limited data exist concerning this transition and the factors promoting it. Here, we study phases of speciation using data from >100 populations of 11 species of Timema stick insects. Consistent with early phases of genic speciation, adaptive colour-pattern loci reside in localized genetic regions of accentuated differentiation between populations experiencing gene flow. Transitions to...

Data from: Physiological predictors of reproductive performance in the European Starling (Sturnus vulgaris)

Melinda A. Fowler, Mélissa Paquet, Véronique Legault, Alan A. Cohen & Tony D. Williams
Background: It is widely assumed that variation in fitness components has a physiological basis that might underlie selection on trade-offs, but the mechanisms driving decreased survival and future fecundity remain elusive. Here, we assessed whether physiological variables are related to workload ability or immediate fitness consequences and if they mediate future survival or reproductive success. We used data on 13 physiological variables measured in 93 female European starlings (Sturnus vulgaris) at two breeding stages (incubation,...

Data from: State dependence, personality, and plants: light-foraging decisions in Mimosa pudica (L.)

Franz W. Simon, Christina N. Hodson & Bernard R. Roitberg
Plants make foraging decisions that are dependent on ecological conditions, such as resource availability and distribution. Despite the field of plant behavioral ecology gaining momentum, ecologists still know little about what factors impact plant behavior, especially light-foraging behavior. We made use of the behavioral reaction norm approach to investigate light foraging in a plant species that exhibits rapid movement: Mimosa pudica. We explored how herbivore avoidance behavior in M. pudica (which closes its leaflets temporarily...

Data from: Unpredictable perturbation reduces breeding propensity regardless of pre-laying reproductive readiness in a partial capital breeder

Pierre Legagneux, Holly L. Hennin, H. Grant Gilchrist, Tony D. Williams, Oliver P. Love & Joël Bêty
Theoretically, individuals of migratory species should optimize reproductive investment based on a combination of timing of and body condition at arrival on the breeding grounds. A minimum threshold body mass is required to initiate reproduction, and the timing of reaching this threshold is critical because of the trade-off between delaying breeding to gain in condition against the declining value of offspring with later reproductive timing. Long-lived species have the flexibility within their life history to...

Data from: Individual dispersal decisions in a cooperative breeder: ecological constraints, the benefits of philopatry, and the social queue for dominance

Martha J. Nelson-Flower, Elizabeth M. Wiley, Thomas P. Flower, Amanda R. Ridley & Tom P. Flower
1. Delayed dispersal is a key step in the evolution of familial animal societies and cooperative breeding. However, no consensus has been reached on the ecological and social circumstances driving delayed dispersal. 2. Here we test predictions from the ecological constraints and benefits of philopatry hypotheses as well as the recently-proposed dual benefits hypothesis to better understand the evolution of group-living and cooperative breeding. Furthermore, we consider how individual social circumstances within groups affect dispersal...

Data from: Sex and occupation time influence niche space of a recovering keystone predator

Erin U. Rechsteiner, Jane C. Watson, M. Tim Tinker, Linda M. Nichol, Matthew J. Morgan Henderson, Christie J. McMIllan, Mike DeRoos, Marie C. Fournier, Anne K. Salomon, Leah D. Honka & Chris T. Darimont
Predators exert strong effects on ecological communities, particularly when they re-occupy areas after decades of extirpation. Within species, such effects can vary over time and by sex, and cascade across trophic levels. We used a space-for-time substitution to make foraging observations of sea otters (Enhydra lutris) across a gradient of re-occupation (1–30 yrs), and nMDS analysis to ask if 1) sea otter niche space varies as a function of occupation time, and 2) if niche...

Data from: Species and population diversity in Pacific salmon fisheries underpin indigenous food security

Holly K. Nesbitt & Jonathan W. Moore
Indigenous people are considered to be among the most vulnerable to food insecurity and biodiversity loss. Biodiversity is cited as a key component of indigenous food security; however, quantitative examples of this linkage are limited. We examined how species and population diversity influence the food security of indigenous fisheries for Pacific salmon (Oncorhynchus species). We compared two dimensions of food security – catch stability (interannual variability) and access (season length) – across a salmon diversity...

Data from: Bayesian analysis of a morphological supermatrix sheds light on controversial fossil hominin relationships

Mana Dembo, Nicholas J. Matzke, Arne Ø. Mooers & Mark Collard
The phylogenetic relationships of several hominin species remain controversial. Two methodological issues contribute to the uncertainty—use of partial, inconsistent datasets and reliance on phylogenetic methods that are ill-suited to testing competing hypotheses. Here, we report a study designed to overcome these issues. We first compiled a supermatrix of craniodental characters for all widely accepted hominin species. We then took advantage of recently developed Bayesian methods for building trees of serially sampled tips to test among...

Data from: Stick insect genomes reveal natural selection's role in parallel speciation

Victor Soria-Carrasco, Zachariah Gompert, Aaron A. Comeault, Timothy E. Farkas, Thomas L. Parchman, J. Spencer Johnston, C. Alex Buerkle, Jeffrey L. Feder, Jens Bast, Tanja Schwander, Scott P. Egan, Bernard J. Crespi & Patrik Nosil
Natural selection can drive the repeated evolution of reproductive isolation, but the genomic basis of parallel speciation remains poorly understood. We analyzed whole-genome divergence between replicate pairs of stick insect populations that are adapted to different host plants and undergoing parallel speciation. We found thousands of modest-sized genomic regions of accentuated divergence between populations, most of which are unique to individual population pairs. We also detected parallel genomic divergence across population pairs involving an excess...

Data from: Conserving evolutionary history does not result in greater diversity over geological timescales

Juan Cantalapiedra, Tracy Aze, Marc Cadotte, Giulio Valentino Dalla Riva, Danwei Huang, Florent Mazel, Matthew Pennell, María Ríos & Arne Mooers
Alternative prioritization strategies have been proposed to safeguard biodiversity over macro-evolutionary timescales. The first prioritizes the most distantly related species (maximizing phylogenetic diversity) in the hopes of capturing at least some lineages that will successfully diversify into the future. The second prioritizes lineages that are currently speciating, in the hopes that successful lineages will continue to generate species into the future. These contrasting schemes also map onto contrasting predictions about the role of slow diversifiers...

Data from: Modification of reproductive schedule in response to pathogen exposure in a wild insect: support for the terminal investment hypothesis

Jenny Cory, Kari Zurowski, Alida Janmaat & Todd Kabaluk
Trade-offs in the time and energy allocated to different functions, such as reproductive activities, can be driven by alterations in condition which reduce resources, often in response to extrinsic factors such as pathogens or parasites. When individuals are challenged by a pathogen they may either reduce reproduction as a cost of increasing defence mechanisms, or alternatively, modify reproductive activities so as to increase fecundity thereby minimizing the fitness costs of earlier death, a behaviour consistent...

Hydrothermal physiology and climate vulnerability in amphibians

Dan Greenberg & Wendy Palen
All relevant data and code for the analysis from: Greenberg DA, Palen WJ. 2021 Hydrothermal physiology and climate vulnerability in amphibians. Proc. R. Soc. B 20202273. https://doi.org/10.1098/rspb.2020.2273 Data on jump performance (jump_performance_trials.csv), water loss rates and water conservation behaviour in Pacific chorus frogs (treefrog_waterloss.csv), and estimated hours of climate restriction based on thermal physiology and hydothermal physiology (physiological_limits_activity.csv) for three species of anurans from the Pacific Northwest. All R code to conduct each analysis is...

Data from: Genome-wide analysis reveals demographic and life history patterns associated with habitat modification in land-locked, deep-spawning sockeye salmon (Oncorhynchus nerka)

Farida Samad-Zada, Brett Van Poorten, Shannon Harris, Lyse Godbout & Michael Russello
Human-mediated habitat fragmentation in freshwater ecosystems can negatively impact genetic diversity, demography and life history of native biota, while disrupting the behaviour of species that are dependent on spatial connectivity to complete their life cycles. In the Alouette River system (British Columbia, Canada), dam construction in 1928 impacted passage of anadromous sockeye salmon (Oncorhynchus nerka), with the last records of migrants occurring in the 1930’s. Since that time, O. nerka persisted as a resident population...

Data from: Density-dependent effects on reproductive output in a capital breeding carnivore, the northern elephant seal (Mirounga angustirostris)

Daniel Costa, Rachel Holser, Daniel Crocker, Patrick Robinson, Gitte McDonald, Melinda Fowler, Jason Hassrick, Luis Hückstädt, Sarah Peterson, Samantha Simmons & Theresa Keates
All organisms face resource limitations that will ultimately restrict population growth, but the controlling mechanisms vary across ecosystems, taxa, and reproductive strategies. Using four decades of data, we examine how variation in the environment and population density affect reproductive outcomes in a capital-breeding carnivore, the northern elephant seal (Mirounga angustirostris). This species provides a unique opportunity to examine the relative importance of resource acquisition and density-dependence on breeding success. Capital breeders accrue resources over large...

Habitats and fish communities at mesophotic depths in the Mexican Pacific

Jordan A. Hollarsmith, Georgina Ramirez-Ortiz, Tallulah Winquist, Manuel Velasco-Lozano, Katherine DuBois, Hector Bonilla, Kyle Neumann & Ted Grosholz
Aim: Mesophotic ecosystems, found at the limit of light penetration in the ocean, are rich in biodiversity and harbor unique ecological communities. However, they remain among the least studied habitat zones on earth due to high costs and technological limitations. Here, we characterize mesophotic communities in two marine reserves across a range of habitat types, depths, and temperatures using submersible technologies, with the goal of understanding the processes that structure these communities across biogeographic regions....

Identification of Random Resource Shares in Collective Households Without Preference Similarity Restrictions

Geoffrey Dunbar, Arthur Lewbel & Krishna Pendakur
Resource shares, defined as the fraction of total household spending going to each person in a household, are important for assessing individual material well-being, inequality and poverty. They are difficult to identify because consumption is measured typically at the household level, and many goods are jointly consumed, so that individual-level consumption in multi-person households is not directly observed. We consider random resource shares, which vary across observationally identical households. We provide theorems that identify the...

The Radio Tales

Elaine Harder
One of a series of Radio Tale audio essays recorded at SFU's CJSF Radio Station.

Registration Year

  • 2022
  • 2021
  • 2020
  • 2019
  • 2018
  • 2017
  • 2016
  • 2015
  • 2014
  • 2013

Resource Types

  • Dataset
  • Dissertation
  • Text
  • Audiovisual
  • Journal Article


  • Simon Fraser University
  • University of British Columbia
  • Fisheries and Oceans Canada
  • University of Alberta
  • Dalhousie University
  • University of Minnesota
  • University of Ottawa
  • University of Victoria
  • Florida State University
  • University of Washington