21 Works

Data from: Do genetic drift and accumulation of deleterious mutations preclude adaptation? Empirical investigation using RADseq in a northern lacustrine fish

Charles Perrier, Anne-Laure Ferchaud, Pascal Sirois, Isabel Thibault & Louis Bernatchez
Understanding genomic signatures of divergent selection underlying long-term adaptation in populations located in heterogeneous environments is a key goal in evolutionary biology. In this study, we investigated neutral, adaptive and deleterious genetic variation using 7,192 SNPs in 31 Lake Trout (Salvelinus namaycush) populations (n = 673) from Québec, Canada. Average genetic diversity was low, weakly shared among lakes, and positively correlated to lake size, indicating a major role for genetic drift subsequent to lake isolation....

Data from: Natal habitat preference induction in large mammals – Like mother, like child?

Benjamin Larue, Steeve D. Côté, Martin-Hugues St-Laurent, Christian Dussault & Mathieu Leblond
Habitat selection has received considerable attention from ecologists during the last decades, yet the underlying forces shaping individual differences in habitat selection are poorly documented. Some of these differences could be explained by the early experience of individuals in their natal habitat. By selecting habitat attributes like those encountered early in life, individuals could improve resource acquisition, survival, and ultimately fitness. This behaviour, known as natal habitat preference induction (NHPI), could be particularly common in...

Data from: Making sense of the relationships between Ne, Nb and Nc towards defining conservation thresholds in Atlantic salmon (Salmo salar)

Anne-Laure Ferchaud, Charles Perrier, Julien April, Cécilia Hernandez, Mélanie Dionne & Louis Bernatchez
Effective population size over a generation (Ne) or over a reproductive cycle (Nb) and the adult census size (Nc) are important parameters in both conservation and evolutionary biology. Ne provides information regarding the rate of loss of genetic diversity and can be tracked back in time to infer demographic history of populations, whereas Nb may often be more easily quantified than Nc for short-term abundance monitoring. In this study, we propose (1) an empirical context...

Data from: Finding common ground: Toward comparable indicators of adaptive capacity of tree species to a changing climate

Isabelle Aubin, Samuel Royer-Tardif, Laura Boisvert-Marsh, Julie Godbout & Nathalie Isabel
Adaptive capacity, one of the three determinants of vulnerability to climate change, is defined as the capacity of species to persist in their current location by coping with novel environmental conditions through acclimation and/or evolution. Although studies have identified indicators of adaptive capacity, few have assessed this capacity in a quantitative way that is comparable across tree species. Yet, such multi-species assessments are needed by forest management and conservation programs to refine vulnerability assessments and...

Data from: Extracting coherent tree-ring climatic signals across spatial scales from extensive forest inventory data

Louis Duchesne, Loïc D'Orangeville, Rock Ouimet, Danile Houle, Daniel Kneeshaw & Loïc D’Orangeville
Increasing access to extensively replicated and broadly distributed tree-ring collections has led to a greater use of these large data sets to investigate climate forcing on tree growth. However, the number of chronologies added to large accessible databases is declining and few are updated, while chronologies are often sparsely distributed and are more representative of marginal growing environments. On the other hand, National Forest Inventories (NFI), although poorly replicated at the plot level as compared...

Deciphering lifelong thermal niche using otolith δ18O thermometry within supplemented lake trout (Salvelinus namaycush) populations

Olivier Morissette, Louis Bernatchez, Michael Wiendenbeck & Pascal Sirois
1. The selection of thermal habitat by fish is strongly regulated by physiology and behaviour. However, delineation of a species lifelong thermal niche remains technically challenging. Lake trout (Salvelinus namaycush) survival and productivity are recognised as being tightly linked to a somewhat restricted thermal habitat. The factors guiding temperature selection during each life stage remain poorly understood. 2. In this study, we tested the significant factors controlling the realised thermal niche of lake trout from...

Where to spend the winter? The role of intraspecific competition and climate in determining the selection of wintering areas by migratory caribou

Mael Le Corre, Christian Dussault & Steeve D. Côté
Depicted as predictable movements, migrations can, however, show important interannual variations, making the conservation of migratory species particularly challenging. Plasticity in migratory behaviour allows individuals to adjust their migratory tactics to maximize their fitness. Destination of migration, and therefore migration patterns, may vary according to climatic and environmental conditions encountered during migration or at the arrival site but also according to competition. In Northern-Québec and Labrador, Canada, fall migration patterns of caribou from the Rivière-George...

Data from: A spatial theory for characterizing predator–multiprey interactions in heterogeneous landscapes

Daniel Fortin, Pietro-Luciano Buono, Oswald J. Schmitz, Nicolas Courbin, Chrystel Losier, Martin-Hugues St-Laurent, Pierre Drapeau, Sandra Heppell, Claude Dussault, Vincent Brodeur & Julien Mainguy
Trophic interactions in multiprey systems can be largely determined by prey distributions. Yet, classic predator–prey models assume spatially homogeneous interactions between predators and prey. We developed a spatially informed theory that predicts how habitat heterogeneity alters the landscape-scale distribution of mortality risk of prey from predation, and hence the nature of predator interactions in multiprey systems. The theoretical model is a spatially explicit, multiprey functional response in which species-specific advection–diffusion models account for the response...

Data from: Intraspecific genetic admixture and the morphological diversification of an estuarine fish population complex

Julian J. Dodson, Audrey Bourret, Marie-France Barrette, Julie Turgeon, Gaetan Daigle, Michel Legault, Frédéric Lecomte & Marie France Barrette
The North-east American Rainbow smelt (Osmerus mordax) is composed of two glacial races first identified through the spatial distribution of two distinct mtDNA lineages. Contemporary breeding populations of smelt in the St. Lawrence estuary comprise contrasting mixtures of both lineages, suggesting that the two races came into secondary contact in this estuary. The overall objective of this study was to assess the role of intraspecific genetic admixture in the morphological diversification of the estuarine rainbow...

Data from: Local adaptation of trees at the range margins impact range shifts in the face of climate change

Kevin A. Solarik, Christian Messier, Rock Ouimet, Yves Bergeron & Dominique Gravel
The ability of tree species to track their climatic niche at rates comparable to global warming is concerning, particularly if they are constrained by local adaptation. If a species is locally adapted at its range margin it could be beneficial for range expansion as it ensures that the genotypes colonizing new areas are the fittest because environmental conditions are more similar to the current ones. In trees, local adaptation can slow range expansion when climate...

Data from: Ecological gradients driving the distribution of four Ericaceae in boreal Quebec, Canada

Nelson Thiffault, Pierre Grondin, Jean Noël & Véronique Poirier
Understory species play a significant role in forest ecosystem dynamics. As such, species of the Ericaceae family have a major effect on the regeneration of tree species in boreal ecosystems. It is thus imperative to understand the ecological gradients controlling their distribution and abundance, so that their impacts can be taken into account in sustainable forest management. Using innovative analytical techniques from landscape ecology, we aimed to position, along ecological gradients, four Ericaceae found in...

Data from: Forest productivity mitigates human disturbance effects on late-seral prey exposed to apparent competitors and predators

Daniel Fortin, Florian Barnier, Pierre Drapeau, Thierry Duchesne, Claude Dussault, Sandra Heppell, Marie-Caroline Prima, Martin-Hugues St-Laurent & Guillaume Szor
Primary production can determine the outcome of management actions on ecosystem properties, thereby defining sustainable management. Yet human agencies commonly overlook spatio-temporal variations in productivity by recommending fixed resource extraction thresholds. We studied the influence of forest productivity on habitat disturbance levels that boreal caribou – a threatened, late-seral ungulate under top-down control – should be able to withstand. Based on 10 years of boreal caribou monitoring, we found that adult survival and recruitment to...

The two oxpecker species reveal the role of movement rates and foraging intensity in species coexistence

Guillaume PERON, Christophe Bonenfant, Roxanne Gagnon & Cheryl Mabika
The two Buphagus oxpecker species are specialized passerines that forage for ticks and other food particles on the body of ungulates in the African savannas. One of their intriguing features is their ability to coexist despite sharing the same, specialized diet. Using co-occurrence data (photographs of giraffes with oxpeckers on them) and Approximate Bayesian Computing, we demonstrate that yellow-billed oxpeckers changed host faster than red-billed oxpeckers and appeared to displace red-billed oxpeckers from preferred giraffe...

Data from: Combining stable isotopes, morphological, and molecular analyses to reconstruct the diet of free-ranging consumers

Michaël Bonin, Christian Dussault, Joëlle Taillon, Nicolas Lecomte & Steeve D. Côté
1. Accurate estimates of animal diet composition are essential to untangle complex interactions in food webs. Biomarkers and molecular tools are increasingly used to estimate diet, sometimes alongside traditional dietary tracing methods. Yet only a few empirical studies have compared the outcomes and potential gains of using a combination of these methods, especially using free-ranging animals with distinct foraging preferences. 2. We used stable isotopes, morphological and molecular analyses to investigate the diet of free-ranging...

Raw data of eDNA quantities from an experimental study testing temperature, water masses, and fish species

Isabeau Caza-Allard, Martin Laporte, Guillaume Côté, Julien April & Louis Bernatchez
Environmental DNA (eDNA) is a very promising approach to facilitate and improve the aquatic species monitoring, which is crucial for their management and conservation. In comparison with the plethora of monitoring studies in the fields, relatively few studies have focused on experimentally investigating the “ecology” of eDNA, in particular pertaining to processes influencing the detection of eDNA. The paucity of knowledge about its ecology hampers the use of eDNA analysis to its full potential. In...

Data from: Exploring rainforest diversification using demographic model testing in the African foam-nest treefrog (Chiromantis rufescens)

Adam Leache, Daniel Portik, Danielle Rivera, Mark-Oliver Rodel, Johannes Penner, Václav Gvoždík, Eli Greenbaum, Gregory Jongsma, Caleb Ofori-Boateng, Marius Burger, Edem Eniang, Rayna Bell & Matthew Fujita
Aim: Species with wide distributions spanning the African Guinean and Congolian rainforests are often composed of genetically distinct populations or cryptic species with geographic distributions that mirror the locations of the remaining forest habitats. We used phylogeographic inference and demographic model testing to evaluate diversification models in a widespread rainforest species, the African Foam-nest Treefrog (Chiromantis rufescens). Location: Guinean and Congolian rainforests, West and Central Africa. Taxon: Chiromantis rufescens. Methods: We collected mitochondrial DNA (mtDNA)...

Data from: An objective approach to select climate scenarios when projecting species distribution under climate change

Nicolas Casajus, Catherine Périé, Travis Logan, Marie-Claude Lambert, Sylvie De Blois & Dominique Berteaux
Occurrences data for three Northeastern-American tree speciestrees_occurrences.zip

Data from: High genetic variation and moderate to high values for genetic parameters of Picea abies resistance to Pissodes strobi

Marie-Josée Mottet, Josianne DeBlois & Martin Perron
Genetic parameters of Picea abies resistance to the white pine weevil (Pissodes strobi Peck) were estimated from 193 full-sib and 166 half-sib families in six 10-year-old progeny trials. The estimated family and individual heritability values for the cumulative weevil attack rate between ages 6 and 10 (CWA6–10) were high and moderate for both full-sib families (0.61 and 0.28, respectively) and half-sib families (0.85 and 0.40, respectively), indicating strong genetic control for this trait in Norway...

Data from: Northeastern North America as a potential refugium for boreal forests in a warming climate

Loïc D'Orangeville, Louis Duchesne, Daniel Houle, Daniel Kneeshaw, Benoît Côté & Neil Pederson
High precipitation in boreal northeastern North America could help forests withstand the expected temperature-driven increase in evaporative demand, but definitive evidence is lacking. Using a network of tree-ring collections from 16,450 stands across 583,000 km2 of boreal forests in Québec, Canada, we observe a latitudinal shift in the correlation of black spruce growth with temperature and reduced precipitation, from negative south of 49°N to largely positive to the north of that latitude. Our results suggest...

Data from: Resampling method for applying density-dependent habitat selection theory to wildlife surveys

Olivia Tardy, Ariane Massé, Fanie Pelletier & Daniel Fortin
Isodar theory can be used to evaluate fitness consequences of density-dependent habitat selection by animals. A typical habitat isodar is a regression curve plotting competitor densities in two adjacent habitats when individual fitness is equal. Despite the increasing use of habitat isodars, their application remains largely limited to areas composed of pairs of adjacent habitats that are defined a priori. We developed a resampling method that uses data from wildlife surveys to build isodars in...

Data from: Linking GPS telemetry surveys and scat analyses helps explain variability in black bear foraging strategies

Rémi Lesmerises, Lucie Rebouillat, Claude Dussault & Martin-Hugues St-Laurent
Studying diet is fundamental to animal ecology and scat analysis, a widespread approach, is considered a reliable dietary proxy. Nonetheless, this method has weaknesses such as non-random sampling of habitats and individuals, inaccurate evaluation of excretion date, and lack of assessment of inter-individual dietary variability. We coupled GPS telemetry and scat analyses of black bears Ursus americanus Pallas to relate diet to individual characteristics and habitat use patterns while foraging. We captured 20 black bears...

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Affiliations

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