15 Works

Data from: The ecology of avian influenza viruses in wild dabbling ducks (Anas spp.) in Canada

Zsuzsanna Papp, Robert G. Clark, E. Jane Parmley, Frederick A. Leighton, Cheryl Waldner & Catherine Soos
Avian influenza virus (AIV) occurrence and transmission remain important wildlife and human health issues in much of the world, including in North America. Through Canada's Inter-Agency Wild Bird Influenza Survey, close to 20,000 apparently healthy, wild dabbling ducks (of seven species) were tested for AIV between 2005 and 2011. We used these data to identify and evaluate ecological and demographic correlates of infection with low pathogenic AIVs in wild dabbling ducks (Anas spp.) across Canada....

Data from: Checkerboard score-area relationships reveal spatial scales of plant community structure

Gordon G. McNickle, Eric G. Lamb, Mike Lavender, , Brandon S. Schamp, Steven D. Siciliano, Richard Condit, Stephen P. Hubbell, Jennifer L. Baltzer & James F Cahill
Identifying the spatial scale at which particular mechanisms influence plant community assembly is crucial to understanding the mechanisms structuring communities. It has long been recognized that many elements of community structure are sensitive to area; however the majority of studies examining patterns of community structure use a single relatively small sampling area. As different assembly mechanisms likely cause patterns at different scales we investigate how plant species co-occurrence patterns change with sampling unit scale. We...

Data from: Biomarker of burden: feather corticosterone reflects energetic expenditure and allostatic overload in captive waterfowl

David W. Johns, Tracy A. Marchant, Graham D. Fairhurst, John R. Speakman & Robert G. Clark
1.Allostatic load describes the interplay between energetic demand and availability and is highly context dependent, varying between seasons and life history stages. When energy demands exceed physiological set points modulated by glucocorticoid hormones, individuals may experience allostatic overload and transition between stages in sub-optimal physiological states. 2.Corticosterone, the major glucocorticoid hormone regulating energy expenditure in birds, is incorporated into growing feathers (CORTf), and it has been suggested that CORTf reflects long-term records of allostatic load...

Data from: Ecology and genomics of an important crop wild relative as a prelude to agricultural innovation

Eric J. B. Von Wettberg, Peter L Chang, Fatma Başdemir, Noelia Carrasquila-Garcia, Lijalem Korbu, Susan M. Moenga, Gashaw Bedada, Alex Greenlon, Ken S. Moriuchi, Vasantika Suryawanshi, Matilde A Cordeiro, Nina V. Noujdina, Kassaye Negash Dinegde, Syed Gul Abbas Shah Sani, Tsegaye Getahun, Lisa Vance, Emily Bergmann, Donna Lindsay, Bullo Erena Mamo, Emily J. Warschefsky, Emmanuel Dacosta-Calheiros, Edward Marques, Mustafa Abdullah Yilmaz, Ahmet Murat Cakmak, Janna Rose … & Douglas R. Cook
Domesticated species are impacted in unintended ways during domestication and breeding. Changes in the nature and intensity of selection impart genetic drift, reduce diversity, and increase the frequency of deleterious alleles. Such outcomes constrain our ability to expand the cultivation of crops into environments that differ from those under which domestication occurred. We address this need in chickpea, an important pulse legume, by harnessing the diversity of wild crop relatives. We document an extreme domestication-related...

Data from: Multilevel and sex-specific selection on competitive traits in North American red squirrels.

David N. Fisher, Stan Boutin, Ben Dantzer, Murray M. Humphries, Jeffrey E. Lane & Andrew G. McAdam
Individuals often interact more closely with some members of the population (e.g. offspring, siblings or group members) than they do with other individuals. This structuring of interactions can lead to multilevel natural selection, where traits expressed at the group-level influence fitness alongside individual-level traits. Such multilevel selection can alter evolutionary trajectories, yet is rarely quantified in the wild, especially for species that do not interact in clearly demarcated groups. We quantified multilevel natural selection on...

Data from: DIY meteorology: use of citizen science to monitor snow dynamics in a data-sparse city

Willemijn M. Appels, Lori Bradford, Kwok Pan Chun, Anna E. Coles & Graham Strickert
Cities are under pressure to operate their services effectively and project costs of operations across various timeframes. In high-latitude and high-altitude urban centers, snow management is one of the larger unknowns and has both operational and budgetary limitations. Snowfall and snow depth observations within urban environments are important to plan snow clearing and prepare for the effects of spring runoff on cities’ drainage systems. In-house research functions are expensive, but one way to overcome that...

Data from: Tissue-specific changes in apoplastic proteins and cell wall structure during cold acclimation of winter wheat crowns

Ian R. Willick, Daisuke Takahashi, D. Brian Fowler, Matsuo Uemura & Karen K. Tanino
The wheat (Triticum aestivum L.) crown is the critical organ of low temperature stress survival over winter. In cold-acclimated crowns, ice formation in the apoplast causes severe tissue disruption as it grows at the expense of intracellular water. While previous crown studies have shown the vascular transition zone (VTZ) to have a higher freezing sensitivity than the shoot apical meristem (SAM), the mechanism behind the differential freezing response is not fully understood. Cooling cold-acclimated crowns...

Data from: Type 2 porcine reproductive and respiratory syndrome virus infection increases apoptosis at the maternal-fetal interface in late gestation pregnant gilts

Predrag Novakovic, John C. S. Harding, Ahmad N. Al-Dissi & Susan E. Detmer
The pathogenesis of fetal death associated with porcine reproductive and respiratory syndrome (PRRS) is hypothesized to be a consequence of PRRS virus-induced apoptosis at the maternal-fetal interface (MFI). The objectives of this study were to evaluate distribution and degree of apoptosis in the uterine and fetal placental tissues during the experimental type 2 PRRS virus (PRRSV) infection and determine associations between apoptosis at the MFI, PRRSV RNA concentration and antigen staining intensity, PRRSV-induced microscopic lesions,...

Data from: Individual quality and age but not environmental or social conditions modulate costs of reproduction in a capital breeder

Lucie Debeffe, Jocelyn Poissant & Philip D. McLoughlin
Costs associated with reproduction are widely known to play a role in the evolution of reproductive tactics with consequences to population and eco-evolutionary dynamics. Evaluating these costs as they pertain to species in the wild remains an important goal of evolutionary ecology. Individual heterogeneity, including differences in individual quality (i.e., among-individual differences in traits associated with survival and reproduction) or state, and variation in environmental and social conditions can modulate the costs of reproduction; however,...

Data from: Diversification and convergence of aposematic phenotypes: truncated receptors and cellular arrangements mediate rapid evolution of coloration in harlequin poison frogs

Andres Posso-Terranova & Jose A. Andres
Aposematic signals represent one of the classical systems to study evolution and, as such, they have received considerable empirical and theoretical investigation. Despite the extensive literature on aposematic coloration, much uncertainty remains about genetic changes responsible for the repeated evolution of similar signals in multiple lineages. Here, we study the diversification and convergence of coloration among lineages of aposematic harlequin poison frogs (O. histrionica complex). Our results suggest that different background phenotypes, showing different color...

Data from: Oxygen and carbon isoscapes for the Baltic Sea: testing their applicability in fish migration studies

Jyrki Torniainen, Anssi Lensu, Pekka J. Vuorinen, Eloni Sonninen, Marja Keinänen, Roger I. Jones, William P. Patterson & Mikko Kiljunen
Conventional tags applied to individuals have been used to investigate animal movement, but these methods require tagged individuals be recaptured. Maps of regional isotopic variability known as “isoscapes” offer potential for various applications in migration research without tagging wherein isotope values of tissues are compared to environmental isotope values. In this study, we present the spatial variability in oxygen (math formula) and dissolved inorganic carbon (δ13CDIC) isotope values of Baltic Sea water. We also provide...

Data from: Use of environmental sites by mule deer: a proxy for relative risk of chronic wasting disease exposure and transmission

María Fernanda Mejía-Salazar, Cheryl L. Waldner, Yeen Ten Hwang & Trent K. Bollinger
Prions that cause chronic wasting disease (CWD) in cervids can remain infective for years outside the host. Infectious cervids shed prions for a long time, consequently depositing prions in frequently used areas. These environmental prions are important in CWD epidemiology. Unfortunately, effective tools for quantifying CWD prions in soil, water, and other environmental sources are not currently available. Our goal was to investigate relative differences in visits by mule deer (Odocoileus hemionus hemionus) to various...

Data from: Trust thy neighbour in times of trouble: background risk alters how tadpoles release and respond to disturbance cues

Kevin R. Bairos-Novak, Matthew D. Mitchell, Adam L. Crane, Douglas P. Chivers, Maud C.O. Ferrari & Maud C. O. Ferrari
In aquatic environments, uninjured prey escaping a predator release chemical disturbance cues into the water. However, it is unknown whether these cues are a simple physiological by-product of increased activity or whether they represent a social signal that is under some control by the sender. Here, we exposed wood frog tadpoles (Lithobates sylvaticus) to either a high or low background risk environment and tested their responses to disturbance cues (or control cues) produced by tadpoles...

Data from: Lesser snow goose helminths show recurring and positive parasite infection-diversity relations

Felipe Dargent, André Morrill, Ray T. Alisauskas, J. Daniel McLaughlin, Dave Shutler & Mark R. Forbes
The patterns and mechanisms by which biological diversity is associated with parasite infection risk are important to study because of their potential implications for wildlife population's conservation and management. Almost all research in this area has focused on host species diversity and has neglected parasite diversity, despite evidence that parasites are important drivers of community structure and ecosystem processes. Here, we assessed whether presence or abundance of each of nine helminth species parasitizing lesser snow...

Data from: The combined fatigue effects of sequential exposure to seated whole body vibration and physical, mental, or concurrent work demands

Marcus Yung, Angelica E. Lang, Jamie Stobart, Aaron M. Kociolek, Stephan Milosavljevic & Catherine Trask
Many occupations in agriculture, construction, transportation, and forestry are non-routine, involving non-cyclical tasks, both discretionary and non-discretionary work breaks, and a mix of work activities. Workers in these industries are exposed to seated whole body vibration (WBV) and tasks consisting of physical, mental, or a combination of demands. Risk assessment tools for non-routinized jobs have emerged but there remains a need to understand the combined effects of different work demands to improve risk assessment methods...

Registration Year

  • 2017
    15

Resource Types

  • Dataset
    15

Affiliations

  • University of Saskatchewan
    15
  • University of Alberta
    2
  • University of Guelph
    2
  • Acadia University
    1
  • Wilfrid Laurier University
    1
  • University of Michigan-Ann Arbor
    1
  • Field Museum of Natural History
    1
  • Department of Plant Biology
    1
  • Algoma University
    1
  • Hong Kong Baptist University
    1