16 Works

Data from: Exploration profiles drive activity patterns and temporal niche specialization in a wild rodent

Elouana Gharnit, Patrick Bergeron, Dany Garant & Denis Réale
Individual niche specialization can have important consequences for competition, fitness, and ultimately population dynamics and ecological speciation. The temporal window and the level of daily activity are niche components that may vary with sex, breeding season, food supply, population density, and predator’s circadian rhythm. More recently, ecologists emphasized that traits such as dispersal and space use could depend on personality differences. Boldness and exploration have been shown to correlate with variation in foraging patterns, habitat...

Trophic structure and mercury transfer in the subarctic fish community of Great Slave Lake, Northwest Territories, Canada

John Chételat, Jillian Rohonczy, Peter A. Cott, Amanda Benwell, Mark R. Forbes, Stacey A. Robinson, Maikel R. Rosabal & Marc Amyot
In recent decades, mercury concentrations have increased in fish of Great Slave Lake (GSL), a subarctic great lake in northern Canada with important recreational, subsistence, and commercial fisheries. This study characterized habitat use and trophic position of common fish species in GSL near the City of Yellowknife (Northwest Territories, Canada), measured mercury concentrations in water and in taxa from lower trophic levels of the food web, and examined trophic and biological influences on mercury concentrations...

Data From: Evaluating the correlation between genome-wide diversity and the release of plastic phenotypic variation in experimental translocations to novel natural environments

Matthew Yates & Dylan Fraser
Phenotypic reaction norms are often shaped and constrained by selection and are important for allowing organisms to respond to environmental change. However, selection cannot constrain reaction norms for environmental conditions that populations have not experienced. This may allow cryptic neutral genetic variation for the reaction norm to accumulate such that a release of phenotypic variation occurs when it is exposed to novel conditions. Most genomic diversity behaves as if functionally neutral. Genome-wide diversity metrics may...

Reactivity, fate and functional roles of dissolved organic matter in anoxic inland waters

Maximilian Peter Lau
The transit of organic matter (OM) through the aquatic compartment of its global cycle has been intensively studied, traditionally with a focus on the processing and degradation of its dissolved fraction (DOM). Because this is so intimately related to oxidation, the notion tenaciously persists that where dioxygen (O2) is absent, DOM turnover is markedly slowed. In this Opinion Piece, we outline how diverse processes shape, transform and degrade DOM also in anoxic aquatic environments, and...

Collision between biological process and statistical analysis revealed by mean-centering

David Westneat, Yimen Araya-Ajoy, Hassen Allegue, Barbara Class, Niels Dingemanse, Ned Dochtermann, Laszlo Garamszegi, Julien Martin, Shinichi Nakagawa, Denis Reale & Holger Schielzeth
1. Animal ecologists often collect hierarchically-structured data and analyze these with linear mixed-effects models. Specific complications arise when the effect sizes of covariates vary on multiple levels (e.g., within vs among subjects). Mean-centering of covariates within subjects offers a useful approach in such situations, but is not without problems. 2. A statistical model represents a hypothesis about the underlying biological process. Mean-centering within clusters assumes that the lower level responses (e.g. within subjects) depend on...

Coordination in parental effort decreases with age in a long-lived seabird

Samantha Patrick, Alexandre Corbeau, Denis Reale & Henri Weimerskirch
Biparental care is widespread in avian species. Individuals may match the contribution of their partner, resulting in equal parental effort, or may exploit their partner, to minimise their own investment. These two hypotheses have received much theoretical and empirical attention in short-lived species, that change mates between seasons. However, in species with persistent pair bonds, where divorce rate is low and costly, selective pressures are different, as partners share the value of future reproduction. In...

Age-dependent phenological plasticity in a wild bird

Suzanne Bonamour, Luis-Miguel Chevin, Denis Reale, Celine Teplitsky & Anne Charmantier
Life-history traits are often plastic in response to environmental factors such as temperature or precipitation, and they also vary with age in many species. Trait variation during the lifetime could thus be partly driven by age-dependent plasticity in these traits. We study whether plasticity of a phenological trait – the egg-laying date – with respect to spring temperature, varies with age, and explore whether this variation relates to changes in breeding success throughout the life...

Behavioral variation in natural contests: integrating plasticity and personality

Charline Couchoux, Dany Garant, Maxime Aubert, Jeanne Clermont & Denis Réale
Animals often interact aggressively when competing over limited resources. Aggressive decisions can be complex, and may result from multiple sources of behavioral variation. The outcome of contests may be explained through contest theory and personality, by considering conjointly plasticity and individual consistency. This integrative approach also allows investigating individual differences in responsiveness to environmental changes. Here we observed multiple agonistic interactions occurring among eastern chipmunks (Tamias striatus) competing for food resources supplied at different distances...

Consumption of red maple in anticipation of beech mast-seeding drives reproduction in Eastern chipmunks

Mathilde Tissier, Denis Réale, Dany Garant & Patrick Bergeron
1. Understanding the determinants of reproduction is a central question in evolutionary ecology. In pulsed resources environments, the reproduction and population dynamics of seed consumers is driven by pulsed production of seeds by trees, or mast-seeding. In Southern Québec, eastern chipmunks (Tamias striatus) exclusively reproduce during the summer before and the spring after a mast-seeding event of American beech. They thus seem to anticipate beech mast by reproducing during early summer, so that juveniles can...

Earlier spring reduces potential for gene flow via reduced flowering synchrony across an elevational gradient

Sébastien Rivest, Geneviève Lajoie, David Watts & Mark Vellend
Premise: One of the best-documented ecological responses to climate warming involves temporal shifts of phenological events. However, we lack an understanding of how phenological responses to climate change vary among populations of the same species. Such variability has the potential to affect flowering synchrony among populations and hence the potential for gene flow. Methods: To test if an earlier start of the growing season affects the potential for gene flow among populations, we quantified the...

Data from: eDNA concentration, population size structure, and mark-recapture data

Matthew Yates, Dylan Glaser, John Post, Melania Cristescu, Dylan Fraser & Alison Derry
Organism abundance is a critical parameter in ecology, but its estimation is often challenging. Approaches utilizing eDNA to indirectly estimate abundance have recently generated substantial interest. However, preliminary correlations observed between eDNA concentration and abundance in nature are typically moderate in strength with significant unexplained variation. Here we apply a novel approach to integrate allometric scaling coefficients into models of eDNA concentration and organism abundance. We hypothesize that eDNA particle production scales non-linearly with mass,...

Data from: The island syndrome hypothesis is only partially validated in two rodent species in an inland-island system

Tristan Juette, Dany Garant, Joël W Jameson & Denis Réale
According to the island syndrome and island rule hypotheses, island isolation and reduced area lead to phenotypic shifts in ecologically relevant traits in insular populations compared to mainland ones. These hypotheses have been built up with oceanic islands in mind or islands where isolation is high and colonization rate relatively limited. This set of hypotheses, however, may not be applicable to other inland-island systems or recently fragmented landscapes. We investigated how island life leads to...

A 249-year chronosequence of forest plots from eight successive fires in the eastern Canada boreal mixedwoods

Kobra Maleki, Philippe Marchand, Danielle Charron, Benoit Lafleur & Yves Bergeron
A combination of wildfires and defoliating insect outbreaks play an important role in the natural successional dynamics of North American boreal forests, which, in the long term, change the post-disturbance composition and structure of forest stands. After stand-replacing disturbances (mainly wildfires), early successional hardwoods typically dominate the affected areas in boreal forests. Provided sufficient time following disturbances, the increasing recruitment of mid- to late-successional softwoods as well as the mortality of hardwoods gradually change forest...

Foraging behavior and extended phenotype independently affect foraging success in spiders

Nicholas DiRienzo, Hannes Schraft, Pierre-Olivier Montiglio, Charles Bradley & Anna Dornhaus
Multiple phenotypic traits often interact with each other to determine an individual’s fitness. Behavioral and extended phenotypic traits, such as architectural constructions, can contribute to fitness in an integrated way. The goal of this study was to understand how the interaction between behavioral and extended phenotypic traits can affect foraging success. We tested this question using black widow spiders, where spiders that are aggressive in a foraging context tend to build more gumfooted silk lines...

Data from: Allometric scaling of eDNA production in stream-dwelling brook trout (Salvelinus fontinalis) inferred from population size structure

Matthew Yates, Taylor Wilcox, Kevin McKelvey, Michael Young, Michael Schwartz & Alison Derry
Environmental DNA (eDNA) concentration exhibits a positive correlation with organism abundance in nature, but modelling this relationship could be substantially improved by incorporating the biology of eDNA production. A recent model (Yates et al. 2020) extended models of physiological allometric scaling to eDNA production, hypothesizing that brook trout eDNA production scales non-linearly with mass as a power-function with scaling coefficients < 1 in lakes. To validate this hypothesis, we re-analysed data from Wilcox et al....

Shade-growing practices lessen the impact of coffee plantations on multiple dimensions of ant diversity

Javier Ibarra-Isassi, Tanya Handa, Anderson Arenas-Clavijo, Selene Escobar-Ramirez, Inge Armbrecht & Jean-Philippe Lessard
1. Land use management influence changes in biodiversity beyond the targeted species. Management practices in coffee plantations have shifted from coffee growing below accompanying (shade) trees, to intensified monocultures in which coffee grows fully exposed to the sun. Anthropogenic disturbance causes changes in species composition relative to adjacent natural patches and reduces their biotic heterogeneity. Here, we assessed the impact of coffee plantation management practices on the taxonomical, phylogenetic, and functional composition of ant communities,...

Registration Year

  • 2020

Resource Types

  • Dataset


  • University of Quebec at Montreal
  • Université de Sherbrooke
  • Concordia University
  • University of Ottawa
  • Bishop's University
  • Centre d'Etudes Biologiques de Chizé
  • University of Montreal
  • University of the Sunshine Coast
  • McGill University
  • Universidad San Francisco de Quito