10 Works

Re-assessment of the climatic controls on the carbon and water fluxes of a boreal aspen forest over 1996-2016: changing sensitivity to long-term climatic conditions

Peng Liu, Alan Barr, Tianshan Zha, T Black, Rachhpal Jassal, Zoran Nesic, Warren Helgason, Xin Jia & Yun Tian
Recent evidence suggests that the relationships between climate and boreal tree growth are generally non-stationary; however, it remains uncertain whether the relationships between climate and carbon (C) fluxes of boreal forests are stationary or have changed over recent decades. In this study, we used continuous eddy-covariance and microclimate data over 21 years (1996-2016) from a 100-year-old trembling aspen stand in central Saskatchewan, Canada to assess the relationships between climate and ecosystem C and water fluxes....

A horizontally transmitted Parasitoid Killing Factor protects insects from parasitoids

Martin Erlandson, Edyta Sieminska, Cathy Coutu, Dwayne Hegedus, David Theilmann, Doug Baldwin & Stephanie Harris
Interkingdom competition occurs between hymenopteran parasitoids and insect viruses sharing the same insect hosts. It has been assumed that parasitoid larvae die with the death of infected host or as result of competition for host resources. Herein we describe a gene family, parasitoid killing factor (pkf), that encodes proteins toxic to parasitoids of the Microgastrinae group and determines parasitism success. Pkfs are found in several entomopathogenic DNA virus families and in some lepidopteran genomes. We...

Data from: Prairie dogs, cattle subsidies, and alternative prey: Seasonal and spatial variation in coyote diet in a temperate grassland

Susan Lingle, C-Jae M. Breiter, David B. Schowalter & John F. Wilmshurst
As the dominant predator on North America’s grasslands, coyotes (Canis latrans) have a large influence on biodiversity, both on working ranches and in protected parks. Ground squirrel (sciurid) species and livestock carrion are often abundant on grasslands worldwide and have the potential to influence a predator’s consumption of alternative prey. We collected 1321 scats in four seasons over two years in and adjacent to Grasslands National Park, Saskatchewan, to test the hypothesis that seasonal and...

Honeybee optomotor behaviour is impaired by chronic exposure to insecticides

Rachel H Parkinson, Caroline Fecher & John R Gray
Honeybees use wide&[ndash]field visual motion information to calculate the distance they have flown from the hive, and this information is communicated to conspecifics during the waggle dance. Seed treatment insecticides, including neonicotinoids and novel insecticides like sulfoxaflor, display detrimental effects on wild and managed bees, even when present at sublethal quantities. These effects include deficits in flight navigation and homing ability, resulting in decreased survival of exposed worker bees. Neonicotinoid insecticides disrupt visual motion detection...

The abundance and diversity of native bees in prairie agroecosystems Samantha Morrice thesis raw data

Samantha Morrice
Habitat loss due to agricultural intensification has negative implications for native bee communities throughout Western Canada. Wetland remnants are a common feature within the Prairie Pothole Region of Saskatchewan and are threatened due to continued conversion to agricultural land. Approximately sixty-one million acres of land are dedicated to agriculture in Saskatchewan. Wetlands and field margins in this region are embedded in these agricultural matrices and may act as important nesting and floral resources for many...

Pyrophilic ground beetle rearing study

Aaron Bell
Many insects are drawn to the heat, ash, and smoke produced by forest fires and arrive in large numbers at recent burns, often while the fire is still active. Some of these insects are pyrophilic and reproduce exclusively in the immediate aftermath of fire but are rarely, if ever, collected from unburnt habitats. Numerous observations made at active fires note an apparent preference among some pyrophilic insects to oviposit exclusively in the burnt portions of...

Data from: Positron-emitting radiotracers spatially resolve unexpected biogeochemical relationships linked with methane oxidation in Arctic soils

Michael Schmidt, Steven Mamet, Curtis Senger, Alixandra Schebel, Mitsuaki Ota, Tony Tian, Umair Aziz, Lisa Stein, Tom Regier, Kevin Stanley, Derek Peak & Steven Siciliano
Arctic soils are marked by cryoturbic features, which impact soil-atmosphere methane (CH4) dynamics vital to global climate regulation. Cryoturbic diapirism alters C/N chemistry within frost boils by introducing soluble organic carbon and nutrients, potentially influencing microbial CH4 oxidation. CH4 oxidation in soils, however, requires a spatio-temporal convergence of ecological factors to occur. Spatial delineation of microbial activity with respect to these key microbial and biogeochemical factors at relevant scales is experimentally challenging in inherently complex...

Dietary shifts may underpin the recovery of a large carnivore population

Mariana Campbell, Vinay Udyawer, Timothy Jardine, Yusuke Fukuda, R. Keller Kopf, Stuart Bunn & Hamish Campbell
Supporting the recovery of large carnivores is a popular yet challenging endeavour. Estuarine crocodiles in Australia are a large carnivore conservation success story, with the population having extensively recovered from past heavy exploitation. Here, we explored if dietary changes had accompanied this large population recovery by comparing the isotopes δ13C and δ15N in bones of crocodiles sampled 40 to 55 years ago (small population) with bones from contemporary individuals (large population). We found that δ13C...

Data from: Targeted genome-wide SNP genotyping in feral horses using non-invasive fecal swabs

Stefan Gavriliuc, Salman Reza, Chanwoori Jeong, Philip McLoughlin & Jocelyn Poissant
The development of high-throughput sequencing has prompted a transition in wildlife genetics from using microsatellites toward sets of Single Nucleotide Polymorphisms (SNPs). However, genotyping large numbers of targeted SNPs using non-invasive samples remains challenging due to relatively large DNA input requirements. Recently, target enrichment has emerged as a promising approach requiring little template DNA. We assessed the efficacy of Tecan Genomics’ Allegro Targeted Genotyping (ATG) for generating genome-wide SNP data in feral horses using DNA...

Data from: Local population collapse of Ross's and lesser snow geese driven by failing recruitment and diminished philopatry

Mitch Weegman, Ray Alisauskas, Dana Kellett, Qing Zhao, Scott Wilson & Tomas Telensky
We estimated survival and per capita production of young, as well as emigration and immigration, from 1997 to 2017 in Ross's goose Anser rossii and lesser snow goose Anser caerulescens caerulescens, which are sympatric species of migratory birds that nest in the central Canadian Arctic at one of the largest breeding colonies in North America. We formed age-structured integrated population models for each species that jointly analyzed live and dead encounter data as well as...

Registration Year

  • 2022

Resource Types

  • Dataset


  • University of Saskatchewan
  • Canadian Light Source (Canada)
  • University of Alberta
  • Charles University
  • Environment and Climate Change Canada
  • Agricultural Research Service
  • McMaster University
  • University of Winnipeg
  • Griffith University
  • University of Missouri