36 Works

Zooplankton and water quality data for 37 lakes in the Gwich'in and Inuvialuit regions of the Northwest Territories

Derek Gray
This dataset includes zooplankton and water quality data from 37 lakes sampled in the Northwest Territories, Canada, from the Dempster and Inuvik-Tuktoyaktuk Highways during July and August of 2017 and 2018. It was collected as part of a project to determine how physicochemical variables affect zooplankton and fish communities in small Arctic lakes.

The Winning Narrative: The Social Genesis of Pilgrimage Sites

Stephen F. Haller & Dane Munro

Repeated measure plant community data after fire in boreal forest, Taiga Shield, Northwest Territories, Canada, 1998-2018

Nicola Day, Jennifer Baltzer & Suzanne Carriere
10 transects were established in the years following fire in boreal forest stands on the Taiga Shield, Northwest Territories, Canada in 1998-1999. These were remeasured annually. Six transects were returned to on 2018 for another measurement. At each measurement, we recorded ground covers, species identities, and counted tree stems (seedlings).

Cyber Security and Ransomware in Financial Markets

Toni Ahnert, Michael Brolley, David Cimon & Ryan Riordan
Financial markets face the constant threat of cyber attacks. We develop a principal-agent model of cyber-attacking with fee-paying clients who delegate security decisions to financial platforms. We derive testable implications about clients’ vulnerability to cyber attacks and about the fees charged. We characterize which cyber attacks actors choose. We find that ransomware attacks are more successful than traditional attacks and that platforms underinvest in security when security is unobservable. Regulating security investment (e.g., minimum security...

Prevalence, causes, and consequences of moral distress in healthcare providers caring for people living with dementia in long-term care during a pandemic

Lynn Haslam-Larmer, Alisa Grigorovich, Hannah Quirt, Katia Engel, Steven Stewart, Kevin Rodrigues, Pia Kontos, Arlene Astell, Josephine McMurray, AnneMarie Levy, Kathleen S Bingham, Alastair J Flint, Colleen Maxwell & Andrea Iaboni
Healthcare providers caring for people living with dementia may experience moral distress when faced with ethically challenging situations, such as the inability to provide care that is consistent with their values. The COVID-19 pandemic produced conditions in long-term care homes (hereafter referred to as ‘care homes’) that could potentially contribute to moral distress. We conducted an online survey to examine changes in moral distress during the pandemic, its contributing factors and correlates, and its impact...

Additional file 1 of Philanthropic donor perspectives about providing harm reduction services for people living with HIV/AIDS in a hospital setting

Katherine Rudzinski, Soo Chan Carusone, Andre Ceranto, Francisco Ibáñez-Carrasco, Lisa McDonald, Dean Valentine, Adrian Guta, Elaine Hyshka, William O’Leary, Andra Cardow & Carol Strike
Additional file 1: Donor survey instrument.

Data from: Phenotypic plasticity in female mate choice behavior is mediated by an interaction of direct and indirect genetic effects in Drosophila melanogaster

David C. S. Filice & Tristan A. F. Long
Female mate choice is a complex decision-making process that involves many context-dependent factors. In Drosophila melanogaster, a model species for the study of sexual selection, indirect genetic effects (IGEs) of general social interactions can influence female mate choice behaviors, but the potential impacts of IGEs associated with mating experiences are poorly understood. Here, we examined whether the IGEs associated with a previous mating experience had an effect on subsequent female mate choice behaviors and quantified...

Spatial environmental complexity mediates sexual conflict and sexual selection in Drosophila melanogaster

Tristan Long & Heather Malek
Sexual selection is an important agent of evolutionary change, but the strength and direction of selection often vary over space and time. One potential source of heterogeneity may lie in the opportunity for male–male and/or male–female interactions imposed by the spatial environment. It has been suggested that increased spatial complexity permits sexual selection to act in a complementary fashion with natural selection (hastening the loss of deleterious alleles and/or promoting the spread of beneficial alleles)...

In Defense of the Pure Pilgrim: De Re Defensionibus Peregrini Castiori

Stephen F. Haller & Dane Munro
Does the pure pilgrim exist? Probably not as a person, but the idea of a pure pilgrim is very much alive, although under threat. John Muir (2002), environmentalist and mountaineer, argued that there is a proper way to climb a mountain. By analogy, there is a virtuous way, allowing for meaningful, spiritual experiences which can be applied to proper peregrination. The early medieval ascetic understanding of pilgrims (St Jerome c. 347-420), was that of wandering...

Terrestrial lichen data for Northwest Territories, Canada

Jennifer Baltzer, Geneviève Degré-Timmons, Nicola Day, Steve Cumming, Merritt Turetsky & Jill Johnstone
Increased fire activity due to climate change may impact the successional dynamics of boreal forests, with important consequences for caribou habitat. Early successional forests have been shown to support lower quantities of caribou forage lichens, but geographic variation in, and controls on, the rates of lichen recovery have been largely unexplored. In this study, we sampled across a broad region in northwestern Canada to compare lichen biomass accumulation in ecoprovinces, including the Saskatchewan Boreal Shield,...

Reproductive maturity in boreal trees, Northwest Territories, Canada

Raquel Alfaro Sánchez, Jill F Johnstone, Steve G Cumming, Nicola Day, Michelle C Mack, Xanthe J Walker & Jennifer L Baltzer
In boreal North America, much of the landscape is covered by fire-adapted forests dominated by serotinous conifers. For these forests, reductions in fire return interval could limit reproductive success, owing to insufficient time for stands to reach reproductive maturity i.e., to initiate cone production. Improved understanding of the drivers of reproductive maturity can provide important information about the capacity of these forests to self-replace following fire. Here, we assessed the drivers of reproductive maturity in...

Supplemental Material - Prevalence, causes, and consequences of moral distress in healthcare providers caring for people living with dementia in long-term care during a pandemic

Lynn Haslam-Larmer, Alisa Grigorovich, Hannah Quirt, Katia Engel, Steven Stewart, Kevin Rodrigues, Pia Kontos, Arlene Astell, Josephine McMurray, AnneMarie Levy, Kathleen S Bingham, Alastair J Flint, Colleen Maxwell & Andrea Iaboni
Supplemental Material for Prevalence, causes, and consequences of moral distress in healthcare providers caring for people living with dementia in long-term care during a pandemic by Lynn Haslam-Larmer, Alisa Grigorovich, Hannah Quirt, Katia Engel, Steven Stewart, Pia Kontos, Arlene Astell, Josephine McMurray, AnneMarie Levy, Kathleen S. Bingham, Kevin Rodrigues, Alastair J. Flint, Colleen Maxwell, Andrea Iaboni in Dementia

Data from: Are flies kind to kin? The role of intra- and inter-sexual relatedness in mediating reproductive conflict

Emily S. Martin & Tristan A. F. Long
As individual success often comes at the expense of others, interactions between the members of a species are frequently antagonistic, especially in the context of reproduction. In theory, this conflict may be reduced in magnitude when kin interact, as cooperative behaviour between relatives can result in increased inclusive fitness. Recent tests of the potential role of cooperative behaviour between brothers in Drosophila melanogaster have proved to be both exciting and controversial. We set out to...

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: What makes a multimodal signal attractive? A preference function approach

Kelly L. Ronald, Ruiyu Zeng, David J. White, Esteban Fernández-Juricic & Jeffrey R. Lucas
Courtship signals are often complex and include components within and across sensory modalities. Unfortunately, the evidence for how multimodal signals affect female preference functions is still rather limited. This is an important scientific gap because preference function shape can indicate which male traits are under the strongest selection. We modelled how preference function shape can be altered under 4 scenarios of varying signal content, including both redundant and non-redundant signals. The model was tested with...

Data from: Cross-generational effects of male reproductive success and offspring immunocompetence in Drosophila melanogaster

Ashley Guncay, Thiropa Balasubramaniam, Katie Plagens, Joel T. Weadge, Tristan A. F. Long, Joel Weadge & Tristan A.F. Long
In some species where males make no direct contribution to a female’s lifetime reproductive success, females choose mates based on the indirect benefits manifested in their offspring. One trait that may be subject to this sexual selection is immunocompetence (the ability to mount an immune response following exposure to pathogens); however, the results of previous work on its link to male attractiveness have been ambiguous. Herein we examine the life history consequences of mating with...

Cuscuta sect. Californicae (Convolvulaceae) revisited: ‘cryptic’ speciation and host range differentiation

Mihai Costea, Hiba ElMiari, Roula Farag, Christopher Fleet & Saša Stefanović
Cuscuta californica complex (sensu lato, s.l.) is a western North American group of species in which the infrastaminal scales are reduced, making the morphological delimitation of species particularly challenging. A revision of this group was prompted by the discovery of an apparent new species from central California based primarily on molecular means. Prompted by this finding, the morphological limits of C. californica s.l. species were comprehensively re-evaluated through a morphometric study. DNA sequences from plastid...

Data from: Genetic trade-offs between male reproductive traits in Drosophila melanogaster

David C.S. Filice, Tristan A.F. Long, David C. S. Filice & Tristan A. F. Long
In Drosophila melanogaster, males engage in both extensive pre-and postcopulatory competition for the opportunity to mate with females and subsequently sire offspring. The selection pressure for increased male reproductive success has resulted in the evolution of a wide diversity of sexual traits. However, despite strong selection, individuals often exhibit considerable phenotypic variation in the expression of these traits, and it is unclear if any of this variation is due to underlying genetic trade-offs. Here, using...

Vascular plant community data for Northwest Territories, Canada

Jennifer Baltzer, Nicola Day, Alison White, Kirsten Reid, Geneviève Degré-Timmons, Steve Cumming, Michelle Mack, Merritt Turetsky, Xanthe Walker & Jill Johnstone
Climate change is altering disturbance regimes outside of historical norms, which can impact biodiversity by selecting for plants with particular traits. The relative impact of disturbance characteristics on plant traits and community structure may be mediated by environmental gradients. We aimed to understand how wildfire impacted understory plant communities and plant regeneration strategies along gradients of environmental conditions and wildfire characteristics in boreal forests. We established 207 plots (60m2) in recently burned stands and 133...

Environmental drivers of Sphagnum growth in peatlands across the Holarctic region

Fia Bengtsson, Håkan Rydin, Jennifer Baltzer, Luca Bragazza, Zhao-Jun Bu, Simon Caporn, Ellen Dorrepaal, Kjell Ivar Flatberg, Olga Galanina, Mariusz Gałka, Anna Ganeva, Irina Goia, Nadezhda Goncharova, Michal Hajek, Akira Haraguchi, Lorna Harris, Elyn Humphreys, Martin Jiroušek, Katarzyna Kajukało, Edgar Karofeld, Natalia Koronatova, Natalia Kosykh, Anna Laine, Mariusz Lamentowicz, Elena Lapshina … & Richard J. Payne
The relative importance of global versus local environmental factors for growth and thus carbon uptake of the bryophyte genus Sphagnum – the main peat-former and ecosystem engineer in northern peatlands – remains unclear. 2) We measured length growth and net primary production (NPP) of two abundant Sphagnum species across 99 Holarctic peatlands. We tested the importance of previously proposed abiotic and biotic drivers for peatland carbon uptake (climate, N deposition, water table depth, and vascular...

Data from: Spontaneous forest regrowth in South-West Europe: consequences for nature’s contributions to people

Irene Martín-Forés, Sandra Magro, Andres Bravo-Oviedo, Raquel Alfaro-Sánchez, Josep M. Espelta, Theresa Frei, Elena Valdés-Correcher, Carmen Rodríguez Fernández-Blanco, Georg Winkel, Gabriel Gerzabek, Arndt Hampe & Fernando Valladares
Context European forests are expanding and becoming denser following the widespread abandonment of farmland and rural areas. Yet, little is known about the goods and services that spontaneous forest regrowth provide to people. Aims We assessed the changes in nature’s contributions to people (NCP) from spontaneous forest regrowth, i.e. forest expansion and densification, in South-West Europe. Methods We investigated 65 forest plots in four different landscapes with contrasting ecological and societal contexts. Two landscapes are...

Which physicochemical variables should zooplankton ecologists measure when they conduct field studies?

Derek Gray, Mariam Elmarsafy, Jasmina Vucic, Matthew Teillet, Thomas Pretty, Rachel Cohen & Mercedes Huynh
Over the last century, a rich literature has developed describing how the physical and chemical environment influences zooplankton communities, but there is little guidance on the suite of limnological variables that should be measured by zooplankton ecologists. We performed a literature review to assess: 1) Which variables were measured most often by zooplankton ecologists; 2) Which of these variables were consistently related to zooplankton abundance and richness; and 3) Whether key variables were overlooked by...

Data from: Community-level flammability declines over 25 years of plant invasion in grasslands

Josep Padullés Cubino, Hannah L. Buckley, Nicola J. Day, Robin Pieper & Timothy J. Curran
1. Exotic plant invasions can alter fire regimes in plant communities. Invaders often possess traits that differ from native plants in the community, resulting in increases or declines in community-level flammability, changing fire regimes, and potentially causing long-term modifications to plant community composition. Although considering traits of multiple invaders and native species together is useful to better understand how invasions change community-level flammability, few studies have done this. 2 Measured morphological and flammability traits of...

Data from: Nutritional geometry and fitness consequences in Drosophila suzukii, the Spotted-Wing Drosophila

Yvonne Young, Natasha Buckiewicz & Tristan A. F. Long
Since its arrival to North America less than a decade ago, the invasive Spotted-Wing Drosophila (Drosophila suzukii) has inflicted substantial economic losses on soft fruit agriculture due to its ability to oviposit into ripening fruits. More effective management approaches for this species are needed, but little is known about the factors that influence behavioral choices made by D. suzukii when selecting hosts, or the consequences that their offspring experience when developing in different environments. Using...

Permafrost thaw in boreal peatlands is rapidly altering forest community composition

Jennifer Baltzer, Rajit Patankar, Katherine Dearborn & Cory A. Wallace
Boreal peatlands are frequently underlain by permafrost, which is thawing rapidly. A common ecological response to thaw is the conversion of raised forested plateaus to treeless wetlands, but unexplained spatial variation in responses, combined with a lack of stand-level data, make it difficult to predict future trajectories of boreal forest composition and structure. We sought to characterize patterns and identify drivers of forest structure, composition, mortality, and recruitment in a boreal peatland experiencing permafrost thaw....

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  • Wilfrid Laurier University
    36
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