45 Works

A new two-fingered dinosaur sheds light on the radiation of Oviraptorosauria

Gregory Funston, Tsogtbaatar Chinzorig, Khishigjav Tsogtbaatar, Yoshitsugu Kobayashi, Corwin Sullivan & Philip Currie
Late Cretaceous trends in Asian dinosaur diversity are poorly understood, but recent discoveries have documented a radiation of oviraptorosaur theropods in China and Mongolia. However, little work has addressed the factors that facilitated this diversification. A new oviraptorid from the Late Cretaceous of Mongolia sheds light on the evolution of the forelimb, which appears to have played a role in the radiation of oviraptorosaurs. Surprisingly, the reduced arm has only two functional digits, highlighting a...

Biodiversity and Forest structure one year following the 2016 Fort McMurray (Alberta) fire event

Jaime Pinzon, Anna Dabros, Federico Riva & James Glasier
Exploration practices for oil sands developments in the boreal forest of western Canada create a network of thousands of kilometers of linear features, particularly seismic lines that dissect these forests posing significant environmental challenges. As wildfire is one of the prevalent stand-replacing natural disturbances in the Canadian boreal forest, it is an important driver of environmental change and stand development that may contribute to the mitigation of such linear industrial footprint. Here, we evaluate the...

Supplementary data for \"Visual cues of predation risk outweigh acoustic cues: a field experiment in black-capped chickadees\"

Josue Arteaga-Torres, Jan Wijmenga & Kimberley Mathot
All data required for the analyses, including R code, presented in the paper "Visual cues of predation risk outweigh acoustic cues: a field experiment in black-capped chickadees" DOI: 10.1098/rspb.2020.2002

Quantification of uncertainties introduced by data-processing procedures of sap flow measurements using the cut-tree method on a large mature tree

Morgane Merlin, Kevin A. Solarik & Simon M. Landhäusser
Motivation: Sap flow sensors are crucial instruments to understand whole-tree water use. The lack of direct calibration of the available methods on large trees and the application of several data-processing procedures may jeopardize our understanding of water uptake dynamics by increasing the uncertainties around sensor-based estimates. We directly compared the heat ratio method (HRM) sap flow measurements to water uptake measured gravimetrically using the cut-tree method on a large mature aspen tree to quantify those...

Validation prediction: a flexible protocol to increase efficiency of automated acoustic processing for wildlife research

Elly Knight, Peter Sólymos, Chris Scott & Erin Bayne
Automated recognition is increasingly used to extract species detections from audio recordings; however, the time required to manually review each detection can be prohibitive. We developed a flexible protocol called ‘validation prediction’ that uses machine learning to predict whether recognizer detections are true or false positives and can be applied to any recognizer type, ecological application, or analytical approach. Validation prediction uses a predictable relationship between recognizer score and the energy of an acoustic signal...

Changes in soil fungal communities following anthropogenic disturbance are linked to decreased lodgepole pine seedling performance

Jackson Beck, Jon Cale, Jean Rodriguez-Ramos, Sanat Kanekar, Justine Karst, James Cahill, Suzanne Simard & Nadir Erbilgin
Summary 1. Disturbances are frequent events across the Canadian boreal forest and can affect both below and above ground ecosystem processes. How disturbances change belowground soil fungal communities and in-turn affect pine establishment and performance is poorly understood. Such understanding has become increasingly important in-light-of observed changes in disturbance regimes in recent years due to climate change. 2. We used a greenhouse experiment to determine how soil inoculum collected from lodgepole pine stands undisturbed (control)...

Three-phase parabolic inhomogeneities with internal uniform stresses in plane and anti-plane elasticity

X. Wang & P. Schiavone
We examine the in-plane and anti-plane stress states inside a parabolic inhomogeneity which is bonded to an infinite matrix through an intermediate coating. The interfaces of the three-phase parabolic inhomogeneity are two confocal parabolas. The corresponding boundary value problems are studied in the physical plane rather than in the image plane. A simple condition is found that ensures that the internal stress state inside the parabolic inhomogeneity is uniform and hydrostatic. Furthermore, this condition is...

Data from: Recovery of a boreal ground-beetle (Coleoptera: Carabidae) fauna 15 years after variable retention harvest

Linhao Wu, Fangliang He & John Spence
1. Retention harvests are preferred over traditional clear-cuts for sustainable forest management because maintenance and re-establishment of native forest biodiversity is a priority. However, few studies have examined long-term responses of biotic assemblages to retention harvest at particular sites. 2. We studied the effects of decreasing initial harvest intensities (clear-cut, 10, 20, 50, and 75% dispersed green tree retention) on carabid beetle assemblages relative to assemblage changes in un-harvested control stands in four successionally ordered...

Dataset of mountain pine beetle outbreak dynamics and direct control in Cypress Hills, SK

Mélodie Kunegel-Lion, Rory L. McIntosh & Mark A. Lewis
The data presented in this article are related to the research article entitled “Mountain pine beetle outbreak duration and pine mortality depend on direct control effort” [1]. This article provides presence of mountain pine beetle infested trees detected by the Saskatchewan Forest Service on a grid covering the spatial extent of the Saskatchewan portion of the Cypress Hills interprovincial park between 2006 and 2018. For each grid cell, associated ecological and environmental covariates, such as...

Interactive effects of global change factors on terrestrial net primary productivity are treatment length- and intensity-dependent

Zilong Ma, Scott Chang, Han Chen & Yongchun Li
1. Individual effects of co‐occurring global change factors on net primary productivity (NPP) have been widely studied; however, their interactive effects remain highly debated. 2. Here, we conducted a global meta‐analysis based on 919 multifactor observations from 120 published studies to examine the interactive effects on NPP of global change factors including elevated [CO2], warming, nitrogen addition, irrigation, drought, and changes in species diversity. 3. On average, of the factors studied, six pairs of factors...

Data from: Age and sex as compounding factors in the relationship between cardiac mitochondrial function and type 2 diabetes in the Nile Grass rat

Jillian Schneider, Woo Hyun Han, Rebecca Matthew, Yves Sauvé & Hélène Lemieux
Our study revisits the role of cardiac mitochondrial adjustments during the progression of type 2 diabetes mellitus (T2DM), while considering age and sex as potential confounding factors. We used the Nile Grass rats (NRs) as the animal model. After weaning, animals were fed either a Standard Rodent Chow Diet (SRCD group) or a Mazuri Chinchilla Diet (MCD group) consisting of high-fiber and low-fat content. Both males and females in the SRCD group, exhibited increased body...

Data from: Prey availability and ambient temperature influence carrion persistence in the boreal forest

Michael Peers, Sean Konkolics, Clayton Lamb, Yasmine Majchrzak, Allyson Menzies, Emily Studd, Rudy Boonstra, Alice Kenney, Charles Krebs, April Robin Martinig, Baily McCulloch, Joseph Silva, Laura Garland & Stan Boutin
1. Scavenging by vertebrates can have important impacts on food web stability and persistence, and can alter the distribution of nutrients throughout the landscape. However, scavenging communities have been understudied in most regions around the globe, and we lack understanding of the biotic drivers of vertebrate scavenging dynamics. 2. In this paper, we examined how changes in prey density and carrion biomass caused by population cycles of a primary prey species, the snowshoe hare (Lepus...

Gene flow and climate-associated genetic variation in a vagile habitat specialist

Zachary MacDonald, Julian Dupuis, Corey Davis, John Acorn, Scott Nielsen & Felix Sperling
Previous work in landscape genetics suggests that geographic isolation is of greater importance to genetic divergence than variation in environmental conditions. This is intuitive when configurations of suitable habitat are the dominant factor limiting dispersal and gene flow, but has not been thoroughly examined for habitat specialists with strong dispersal capability. Here, we evaluate the effects of geographic and environmental isolation on genetic divergence in a vagile invertebrate with high habitat specificity and a discrete...

Data from - Ecological insights from three decades of animal movement tracking across a changing Arctic

Gil Bohrer, Sarah Davidson, Eliezer Gurarie, Scott LaPoint, Peter Mahoney, Emma Grier, Ophélie Couriot, Allicia Kelly, Bryan Bedrosian, Jerrold Belant, Travis Booms, Bridget Borg, Stan Boutin, Erica Craig, Tracy Davison, Robert Domenech, James Hodson, Kyle Joly, Nicholas Larter, A. David M. Latham, Stephen Lewis, Carol McIntyre, Tricia Miller, Kelsey Russell, Dale Seip … & Judy Williams
We provide here the data used in analysis of 3 test cases, presented in the manuscript "Ecological insights from three decades of animal movement tracking across a changing Arctic". We utilized the new Arctic Animal Movement Archive (AAMA), a growing collection of 201 standardized terrestrial and marine animal tracking studies from 1991–present. The AAMA supports public data discovery, preserves fundamental baseline data for the future, and facilitates efficient, collaborative data analysis. With three AAMA-based case...

Data from: Functional diversity of decomposers modulates litter decomposition affected by plant invasion along a climate gradient

Junwei Luan, Shirong Liu, Siyu Li, Joann Whalen, Yi Wang, Jingxi Wang, Yanchun Liu, Wei Dong & Scott Chang
1. Litter decomposition is fundamental to carbon (C) and nutrient cycling in ecosystems, which could be altered by plant invasion. The impacts of plant invasion on litter decomposition are generally predicted by traits difference between leaf litters of invasive and non-invasive species. However, plant invasion not only changes litter composition, but might also increase the activity or change the functional diversity of decomposers to alter litter decomposition, which is barely studied, and the effect could...

Plant Biomass data from: Bottom-up Herbivore-Plant Feedbacks Trump Trophic Cascades in a Wolf-Elk-Grassland System

Trevor Weeks, Evelyn Merril & Mark Hebblewhite
Top-down predator-prey effects that alter the abundance, biomass, or productivity of a population community across more than one link in a food web are referred to as trophic cascades. While these effects have been extensively studied in aquatic environments, fewer studies have examined trophic cascades in terrestrial ecosystems. And fewer still terrestrial studies have tested for trophic cascades between vertebrates and grassland vegetation. Across the globe, grassland plant biomass is driven by both precipitation and...

Data from: Body temperature, heart rate, and activity patterns of two boreal homeotherms in winter: homeostasis, allostasis, and ecological coexistence

Allyson Menzies, Emily Studd, Yasmine Majchrzak, Michael Peers, Stan Boutin, Ben Dantzer, Jeffrey Lane, Andrew McAdam & Murray Humphries
Organisms survive environmental variation by combining homeostatic regulation of critical states with allostatic variation of other traits, and species differences in these responses can contribute to coexistence in temporally-variable environments. In this paper, we simultaneously record variation in three functional traits – body temperature (Tb), heart rate, and activity - in relation to three forms of environmental variation – air temperature (Ta), photoperiod, and experimentally-manipulated resource levels – in free-ranging snowshoe hares and North American...

Data from: A prospective harmonized multicentre DTI study of cerebral white matter degeneration in ALS

Sanjay Kalra, Hans-Peter Müller, Abdullah Ishaque, Lorne Zinman, Lawrence Korngut, Angela Genge, Christian Beaulieu, Richard Frayne, Simon J. Graham & Jan Kassubek
Objective: To evaluate progressive white matter (WM) degeneration in ALS. Methods: Sixty-six patients with ALS and 43 healthy controls were enrolled in a prospective, longitudinal, multicentre study in the Canadian ALS Neuroimaging Consortium (CALSNIC). Participants underwent a harmonized neuroimaging protocol across 4 centres including diffusion tensor imaging (DTI) for assessment of WM integrity. Three visits were accompanied by clinical assessments of disability (ALSFRS-R) and upper motor neuron (UMN) function. Voxel-wise whole brain and quantitative tractwise...

Isotopic evidence for long-distance connections of the AD thirteenth century Promontory caves occupants

Jessica Metcalfe, John Ives, Sabrina Shirazi, Kevin Gilmore, Jennifer Hallson, Fiona Brock, Bonnie Clark & Beth Shapiro
The Promontory caves (Utah) and Franktown Cave (Colorado) contain high-fidelity records of short-term occupations by groups with material culture connections to the Subarctic/Northern Plains. This research uses Promontory and Franktown bison dung, hair, hide, and bone collagen to establish local baseline carbon isotopic variability and identify leather from a distant source. The ankle wrap of one Promontory Cave 1 moccasin had a δ13C value that indicates a substantial C4 component to the animal’s diet, unlike...

Écrire un archipel fracturé : Hamouro et les tensions postcoloniales dans les Comores

Srilata Ravi
Constitué de quatre petites îles, Grande Comore, Anjouan, Mohéli, et Mayotte l’archipel des Comores se trouve fracturé par le statut politique de Mayotte, ancienne colonie française rattachée à Madagascar et aujourd’hui, 101e département de la France. En dépit de cette séparation politique, les îles sont intimement liées par leur identité musulmane et elles sont toutes rattachées à l’Afrique centrale, à Madagascar et à Zanzibar par les migrations anciennes. Alors que Mayotte bénéficie de son appartenance...

Evaluating the performance of probabilistic algorithms for phylogenetic analysis of big morphological datasets: a simulation study

Oksana Vernygora, Tiago Simões & Erin Campbell
Reconstructing the tree of life is an essential task in evolutionary biology. It demands accurate phylogenetic inference for both extant and extinct organisms, the latter being almost entirely dependent on morphological data. While parsimony methods have traditionally dominated the field of morphological phylogenetics, a rapidly growing number of studies are now employing probabilistic methods (maximum likelihood and Bayesian inference). The present-day toolkit of probabilistic methods offers varied software with distinct algorithms and assumptions for reaching...

Data from: Cell death and survival due to cytotoxic exposure modeled as a two-state Ising system

Sahar Arbabi Moghadam, Vahid Rezania & Jack Tuszynski
Cancer chemotherapy agents are assessed for their therapeutic utility primarily by their ability to cause apoptosis of cancer cells and their potency is given by an IC50 value. Chemotherapy uses both target-specific and systemic-action drugs and drug combinations to treat cancer. It is important to judiciously choose a drug type, its dosage, and schedule for optimized drug selection and administration. Consequently, the precise mathematical formulation of cancer cells response to chemotherapy may assist in the...

nkx3.2 mutant zebrafish accommodate jaw joint loss through a phenocopy of the head shapes of Paleozoic jawless fish

Ted Allison, Tetsuto Miyashita, Pranidhi Baddam, Joanna Smeeton, Adam Phillip Oel, Natasha Natarajan, Brogan Gordon, A. Richard Palmer, Gage Crump, Daniel Graf & W. Ted Allison
The vertebrate jaw is a versatile feeding apparatus. To function, it requires a joint between the upper and lower jaws, so jaw joint defects are often highly disruptive and difficult to study. To describe the consequences of jaw-joint dysfunction, we engineered two independent null alleles of a single jaw-joint marker gene, nkx3.2, in zebrafish. These mutations caused zebrafish to become functionally jawless via fusion of the upper and lower jaw cartilages (ankylosis). Despite lacking jaw...

A new marine woodground ichnotaxon from the Lower Cretaceous Mannville Group, Saskatchewan, Canada

Scott Melnyk, Stephen Packer, John-Paul Zonneveld & Murray Gingras
A new wood-boring ichnospecies is described from transgressive (lagoonal) deposits of the Lower Cretaceous Sparky Formation (Mannville Group) in west-central Saskatchewan, Canada. Apectoichnus lignummasticans isp. nov. is a trace fossil that occurs in a thin coal bed and which was emplaced in an in situ xylic substrate (woodground). The ichnofossil is thin, elongate, unbranched, and straight to gently curved with a circular cross section and uniform diameter. Apectoichnus lignummasticans is similar in many respects to...

LTREB: Yaha Tinda Elk Project

Hans Martin, Mark Hebblewhite & Evelyn Merrill
The Ya Ha Tinda Elk project is now amongst the longest running elk research project in the world. Initiated in 2000, the Ya Ha Tinda elk project is the result of a collaboration between University of Alberta, University of Montana, Parks Canada, and Alberta Environment and Parks, Fish and Wildlife Division. While early studies in the late 1970’s and early 1980’s lead by Dr. Luigi Morgantini laid the foundation for our latter studies (Morgantini and...

Registration Year

  • 2020
    45

Resource Types

  • Dataset
    42
  • Text
    2
  • Data Paper
    1

Affiliations

  • University of Alberta
    45
  • McGill University
    6
  • University of British Columbia
    4
  • Lakehead University
    3
  • Environment Canada
    3
  • University of Montana
    2
  • University of Saskatchewan
    2
  • University of Cincinnati
    2
  • University of Toronto
    2
  • Uppsala University
    2