A5019370881- Ecology and Vegetation Dynamics Studies
- Animal Behavior and Reproduction
- Plant and animal studies
- Animal Ecology and Behavior Studies
- Species Distribution and Climate Change
- Ecosystem dynamics and resilience
- Aquatic Ecosystems and Phytoplankton Dynamics
- Fish Ecology and Management Studies
- Evolution and Genetic Dynamics
- COVID-19 epidemiological studies
- Physiological and biochemical adaptations
- Avian ecology and behavior
- Health disparities and outcomes
- Geriatric Care and Nursing Homes
- Marine and coastal ecosystems
- Wildlife Ecology and Conservation
- Insurance, Mortality, Demography, Risk Management
- Mental Health Research Topics
- Environmental and biological studies
- Fire effects on ecosystems
- Dementia and Cognitive Impairment Research
- Climate Change and Health Impacts
- Soil and Water Nutrient Dynamics
- Environmental DNA in Biodiversity Studies
- Microbial Community Ecology and Physiology
University of Guelph
2016-2025
University of Waterloo
2021-2025
Ecological Society of America
2019
ORCID
2017
Google (United States)
2016
Environment and Climate Change Canada
2009
Since 2005, the Brazilian Ornithological Records Committee (CBRO) has published updated checklists of birds almost every year. Herein, we present a completely new and annotated version our checklist. For first time, list all bird subspecies known from Brazil that are currently accepted by at least one key ornithological reference work. The inclusion should be seen as synthesis, not taxonomic endorsement. As such, include in checklist 1919 avian species, 910 which treated polytypic works...
Seasonality is a critically important aspect of environmental variability, and strongly shapes all aspects life for organisms living in highly seasonal environments. has played key role generating biodiversity, driven the evolution extreme physiological adaptations behaviors such as migration hibernation. Fluctuating selection pressures on survival fecundity between summer winter provide complex selective landscape, which can be met by combination three outcomes adaptive evolution: genetic...
Abstract Despite being widely used, habitat selection models are rarely reliable and informative when applied across different ecosystems or over time. One possible explanation is that context‐dependent due to variation in consumer density and/or resource availability. The goal of this paper provide a general theoretical perspective on the contributory mechanisms density‐dependent selection, as well our capacity account for their effects. Towards we revisit ideal free distribution (IFD),...
Allee effects driven by predation can play a strong role in the decline of small populations but are conventionally thought to occur when generalist predators target specific prey (i.e. type II functional response). However, aside from direct consumption, fear could also increase vigilance and reduce time spent foraging as population size decreases, has been observed wild mammals living social groups. To investigate on fitness relation density species with limited sociality, we exposed...
Most animal populations have distinct breeding and non-breeding periods, yet the implications of seasonality on population dynamics are not well understood. Here, we introduce an experimental model system to study two important consequences seasonality: sequential density dependence carry-over effects (COEs). Using a replicated seasonal Drosophila, placed individuals at four densities in season then, among those that survived, them breed three different densities. We show COEs arising from...
Fear of predation can have non-lethal effects on individuals within a season but whether, and to what extent, these carry over into subsequent seasons is not known. Using replicated seasonal population the common fruit fly, Drosophila melanogaster, we examined both within- cross-seasonal fear survival reproductive output. Compared controls, flies exposed scent mantid (Tenodera sinensis) predators in non-breeding had 64% higher mortality, lost 60% more mass by end and, breeding season,...
Aggression can be beneficial in competitive environments if aggressive individuals are more likely to access resources than non-aggressive individuals. However, variation behaviour persists within populations, suggesting that high levels of aggression might not always favoured. The goal this study was experimentally assess the effects population density and phenotypic frequency on selection a environment. We compared survival two strains Drosophila melanogaster differ across three treatments...
Migratory animals present a unique challenge for understanding the consequences of habitat loss on population dynamics because individuals are typically distributed over series interconnected breeding and non-breeding sites (termed migratory network). Using replicated populations Drosophila melanogaster mathematical model, we investigated three hypotheses to explain how influenced in networks with different degrees connectivity between seasons. We found that increased degree network size at...
Abstract Context The COVID-19 pandemic has reignited a commitment from the health policy and services research communities to rebuilding trust in healthcare created renewed appetite for measures of system monitoring evaluation. aim present paper was develop multidimensional measure that: (1) Is responsive conceptual methodological limitations existing measures; (2) Can be used identify systemic explanations lower levels equity-deserving populations; (3) design evaluate interventions aiming...
Abstract Reduced body size and accelerated life cycle due to warming are considered major ecological responses climate change with fitness costs at the individual level. Surprisingly, we know little about how relevant factors can alter these history trade‐offs their consequences for fitness. Here, show that food modulates temperature‐dependent effects on in water flea Daphnia magna interacts temperature affect parameters. We exposed 412 individuals a factorial manipulation of abundance...
In seasonal environments, where density dependence can operate throughout the annual cycle, vital rates are typically considered to be a function of number individuals at beginning each season. However, variation in previous season could also cause surviving poor physiological condition, which carry over influence individual success following We examine this hypothesis using replicated populations Drosophila melanogaster, common fruitfly, 23 non-overlapping generations with distinct breeding...
Background: The COVID-19 pandemic has raised serious concerns about the mental health impact of people directed and indirectly affected by virus. Because this is a rapidly evolving situation, our goal was to explore potential risk factors trends in feelings anxiety depression among general population Canada over first 5 months pandemic. Methods: We completed on-line surveys 3,127 unique individuals representative Canadian at 4 discreet periods every 6 weeks from April 15th July 28th 2020....
In seasonal populations, vital rates are not only determined by the direct effects of density at beginning each season, but also past seasons. Such delayed dependence can arise via non-lethal on individuals that carry over to influence per capita rates. this study, we examine (i) whether parental breeding influences offspring size, (ii) how could affect survival during subsequent non-breeding period and (iii) population consequences relationship. Using Drosophila melanogaster, common fruit...
Understanding dispersal is critical for predicting a wide range of ecological dynamics. Variation in intraspecific density widely regarded as major factor influencing rates but it not clear why positively related to some systems and negatively other systems. Using seasonal populations Drosophila melanogaster , we experimentally show that are both breeding at the time beginning previous non‐breeding season. This suggests flies use cue habitat quality also influenced by delayed, non‐lethal...
Predicting the ecological responses to climate change is particularly challenging, because organisms might be affected simultaneously by synergistic effects of multiple environmental stressors. Global warming often accompanied declining calcium concentration in many freshwater ecosystems. Although there growing evidence that these changes water chemistry and thermal conditions can influence ecosystem dynamics, little information currently available about how stressors could behaviour aquatic...
Stable hydrogen isotopes (δD) can be a powerful tool for estimating the large-scale movements of animals, but cause and extent isotopic variation within animal tissues remain poorly understood. Here, we simultaneously examined three hypotheses to explain δD in blood (δD B ) nestling Tree Swallows ( Tachycineta bicolor (Vieillot, 1808)) from single nest-box population southern Ontario, Canada: (1) microgeographic (or) temporal local diet, (2) potential evaporation protium resulting...
Abstract Newcomers to Canada have been disproportionally affected by COVID-19, with higher rates of infection and severity illness. Determinants may relate social structural inequities that impact newcomers’ capacity follow countermeasures. Our aim was describe document factors shaping acceptance COVID-19 Semi-structured qualitative interviews were conducted individuals living in for <5 years. Participants asked discuss their pandemic experiences, perceptions measures. Five themes...