15 Works

Hydroxyacetophenone defenses in white spruce against spruce budworm

Genevieve Parent, Claudia Méndez-Espinoza, Isabelle Giguère, Melissa H. Mageroy, Martin Charest, Éric Bauce, Joerg Bohlmann & John MacKay
We review a recently discovered white spruce (Picea glauca) chemical defense against spruce budworm (Choristoneura fumiferana) involving hydroxyacetophenones. These defense metabolites detected in the foliage accumulate variably as the aglycons, piceol and pungenol, or the corresponding glucosides, picein and pungenin. We summarize current knowledge of the genomic, molecular and biochemical as well as genetic underpinnings of this defense and its effects on C. fumiferana. We present an update with new results on the ontogenic variation...

Data from: Temporal variation in spatial genetic structure during population outbreaks: distinguishing among different potential drivers of spatial synchrony

Jeremy Larroque, Simon Legault, Rob Johns, Lisa Lumley, Michel Cusson, Sébastien Renaut, Roger Levesque & Patrick M. A. James
Spatial synchrony is a common characteristic of spatio-temporal population dynamics across many taxa. While it is known that both dispersal and spatially autocorrelated environmental variation (i.e., the Moran effect) can synchronize populations, the relative contributions of each, and how they interact, is generally unknown. Distinguishing these mechanisms and their effects on synchrony can help us to better understand spatial population dynamics, design conservation and management strategies, and predict climate change impacts. Population genetic data can...

Data from: Turning down the heat: vegetation feedbacks limit fire regime responses to global warming

Jean Marchal, Steven G. Cumming & Eliot J. B. McIntire
Climate change is projected to dramatically increase boreal wildfire activity, with broad ecological and socio-economic consequences. As global temperatures rise, periods with elevated fire weather are expected to increase in frequency and duration, which would be expected to increase the number and size of fires. Statistical forecasts or simulations of future fire activity often account for direct climatic effects only, neglecting other controls of importance, such as biotic feedbacks. This could result in overestimating the...

Data from: Comparing pool‐seq, rapture, and GBS genotyping for inferring weak population structure: the American lobster (Homarus americanus) as a case study

Yann Dorant, Laura Benestan, Quentin Rougemont, Eric Normandeau, Brian Boyle, Rémy Rochette & Louis Bernatchez
Unraveling genetic population structure is challenging in species potentially characterized by large population size and high dispersal rates, often resulting in weak genetic differentiation. Genotyping a large number of samples can improve the detection of subtle genetic structure, but this may substantially increase sequencing cost and downstream bioinformatics computational time. To overcome this challenge, alternative, cost‐effective sequencing approaches, namely Pool‐seq and Rapture, have been developed. We empirically measured the power of resolution and congruence of...

Spatial structure affects phage efficacy in infecting dual-strain biofilms of Pseudomonas aeruginosa

Samuele Testa, Sarah Berger, Philippe Piccardi, Frank Oechslin, Grégory Resch & Sara Mitri
Bacterial viruses, or phage, are key members of natural microbial communities. Yet much research on bacterial-phage interactions has been conducted in liquid cultures involving single bacterial strains. Here we explored how bacterial diversity affects the success of lytic phage in structured communities. We infected a susceptible Pseudomonas aeruginosa strain PAO1 with a lytic phage Pseudomonas 352 in the presence versus absence of an insensitive P. aeruginosa strain PA14, in liquid culture versus colonies on agar....

Capture-recapture data with partially known birth date in four populations of yellow-bellied toads

Hugo Cayuela, Jean-François Lemaître, Eric Bonnaire, Julian Pichenot & Benedikt Schmidt
1. Patterns of actuarial senescence can be highly variable among species. Previous comparative analyses revealed that both age at the onset of senescence and rates of senescence are linked to species position along the fast-slow life-history continuum. As there are few long-term datasets of wild populations with known-age individuals, intraspecific (i.e. between-population) variation in senescence is understudied and limited to comparisons of wild and captive populations of the same species, mostly birds and mammals. 2....

Merging indigenous and scientific knowledge links climate with the growth of a large migratory caribou population

Catherine A. Gagnon, Sandra Hamel, Don E. Russell, Todd Powell, James Andre, Michael Y. Svoboda & Dominique Berteaux
1. Climate change in the Arctic is two to three times faster than anywhere else in the world. It is therefore crucial to understand the effects of weather on keystone arctic species, particularly those such as caribou (Rangifer tarandus) that sustain northern communities. Bridging long-term scientific and indigenous knowledge offers a promising path to achieve this goal, as both types of knowledge may complement one another. 2. We assessed the influence of environmental variables on...

Predation risk and mountain goat reproduction: Evidence for stress-induced breeding suppression in a wild ungulate

Frédéric Dulude-De Broin, Sandra Hamel, Gabriela F. Mastromonaco & Steeve D. Côté
Abstract 1. Non-consumptive effects of predation can strongly impact reproduction and demography of prey species. Still, the underlying mechanisms that drive non-consumptive effects are not fully understood, and the circumstances under which chronic physiological stress may mediate these effects remain unclear. 2. Benefiting from over 23 years of environmental, physiological and demographic data, we tested the hypothesis that predation risk may impair reproduction of mountain goats through chronic elevation of physiological stress. We conducted path...

Speciation history of European (Anguilla anguilla) and American eel (A. rostrata), analyzed using genomic data

Natacha Nikolic, Shenglin Liu, Magnus W. Jacobsen, Bjarni Jónsson, Louis Bernatchez, Pierre-Alexandre Gagnaire & Michael M. Hansen
Speciation in the ocean could differ from terrestrial environments due to fewer barriers to gene flow. Hence, sympatric speciation might be common, with American and European eel being candidates for exemplifying this. They show disjunct continental distributions on both sides of the Atlantic, but spawn in overlapping regions of the Sargasso Sea from where juveniles are advected to North American, European and North African coasts. Hybridization and introgression is known to occur, with hybrids almost...

Data from: Maternal longevity and offspring sex in wild ungulates

Mathieu Douhard, Marco Festa-Bianchet, Sandra Hamel, Dan Nussey, Steeve Côté, Josephine Pemberton & Fanie Pelletier
In species with sexual size dimorphism, offspring of the larger sex usually have greater energy requirements and may lead to greater fitness costs for parents. The effects of offspring sex on maternal longevity, however, have only been tested in humans. Human studies produced mixed results and considerable debate mainly due to the difficulty of distinguishing the effects of sexual dimorphism from sociocultural factors. To advance this debate, we examined how the relative number of sons...

Data from: Absence of founder effect and evidence for adaptive divergence in a recently introduced insular population of white-tailed deer (Odocoileus virginianus).

Jérémie Fuller, Anne-Laure Ferchaud, Martin Laporte, Jérémy Le Luyer, Theodore B. Davis, Steeve D. Côté & Louis Bernatchez
Islands are generally colonized by few individuals which could lead to a founder effect causing loss of genetic diversity and rapid divergence by strong genetic drift. Insular conditions can also induce new selective pressures on populations. Here, we investigated the extent of genetic differentiation within a white-tailed deer (Odocoileus virginianus) population introduced on an island and its differentiation with its source mainland population. In response to their novel environmental conditions, introduced deer changed phenotypically from...

Data from: Continent-wide population genomic structure and phylogeography of North America’s most destructive conifer defoliator, the spruce budworm (Choristoneura fumiferana)

Lisa Lumley, Esther Pouliot, Jérôme Laroche, Brian Boyle, Bryan Brunet, Roger Levesque, Felix Sperling & Michel Cusson
The spruce budworm, Choristoneura fumiferana, is presumed to be panmictic across vast regions of North America. We examined the extent of panmixia by genotyping 3650 single nucleotide polymorphism (SNP) loci in 1975 individuals from 128 collections across the continent. We found three spatially structured subpopulations: Western (Alaska, Yukon), Central (southeastern Yukon to the Manitoba-Ontario border) and Eastern (Manitoba-Ontario border and Atlantic). Additionally, the most diagnostic genetic differentiation between the Central and Eastern subpopulations was chromosomally...

Data from: Transcriptomic signatures of social experience during early development in a highly social cichlid fish

Cecilia Nyman, Francois Olivier Hebert, Mathilde Bessert-Nettelbeck, Nadia Aubin-Horth & Barbara Taborsky
The social environment encountered early during development can temporarily or permanently influence life history decisions and behaviour of individuals and correspondingly shape molecular pathways. In the highly social cichlid fish Neolamprologus pulcher, deprivation of brood care permanently affects social behaviour, and alters the expression of stress axis genes in juveniles and adults. It is unclear when gene expression patterns change during early life depending on social experience, and which genes are involved. We compared brain...

Data from: Trophic interactions and abiotic factors drive functional and phylogenetic structure of vertebrate herbivore communities across the Arctic tundra biome

James D.M. Speed, Ina A. Skjelbred, Isabel C. Barrio, Michael D. Martin, Dominique Berteaux, C. Guillermo Bueno, Katie S. Christie, Bruce C. Forbes, Jennifer Forbey, Daniel Fortin, Jon-Arvid Grytnes, Katrine S. Hoset, Nicolas Lecomte, Bryndis Marteinsdottir, Jesper B. Mosbacher, Åshild O. Pedersen, Virve Ravolainen, Eileen C. Rees, Anna Skarin, Natalya Sokolova, Andrew H. Thornhill, Ingunn Tombre & Eeva M. Soininen
Communities are assembled from species that evolve or colonise a given geographic region, and persist in the face of abiotic conditions and interactions with other species. The evolutionary and colonisation histories of communities are characterised by phylogenetic diversity, while functional diversity is indicative of abiotic and biotic conditions. The relationship between functional and phylogenetic diversity infers whether species functional traits are divergent (differing between related species) or convergent (similar among distantly related species). Biotic interactions...

Data from: Climate outweighs native vs. non-native range-effects for genetics and common garden performance of a cosmopolitan weed

Christoph Rosche, Isabell Hensen, Adrian Schaar, Uzma Zehra, Marie Jasieniuk, Ragan M. Callaway, Damase P. Khasa, Mohammad M. Al-Gharaibeh, Ylva Lekberg, David U. Nagy, Robert W. Pal, Miki Okada, Karin Schrieber, Kathryn G. Turner, Susanne Lachmuth, Andrey Erst, Tomonori Tsunoda, Min Sheng, Robin Schmidt, Yanling Peng, Wenbo Luo, Yun Jäschke, Zafar A. Reshi & Manzoor A. Shah
Comparing genetic diversity, genetic differentiation and performance between native and non-native populations has advanced our knowledge of contemporary evolution and its ecological consequences. However, such between-range comparisons can be complicated by high among-population variation within native and non-native ranges. For example, native vs. non-native comparisons between small and non-representative subsets of populations for species with very large distributions have the potential to mislead because they may not sufficiently account for within-range adaptation to climatic conditions,...

Registration Year

  • 2019

Resource Types

  • Dataset


  • Université Laval
  • The Arctic University of Norway
  • Russian Academy of Sciences
  • University of Montana
  • Université de Sherbrooke
  • Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias
  • North-West University
  • University of Alberta
  • University of Montreal
  • University of Lausanne