14 Works

Data from: Consequences of multiple simultaneous opportunities to exploit others’ efforts on free riding

Frédérique Dubois & Étienne Richard-Dionne
Individuals within a group do not all act in the same way: typically the investors (or producers) put efforts into producing resources while the free riders (or scroungers) benefit from these resources without contributing. In behavioural ecology, the prevalence of free riders can be predicted by a well-known game-theoretical model -the Producer-Scrounger (PS) model- where group members have the options to either search for resources (producers) or exploit the efforts of others (scroungers). The PS...

Learning can be detrimental for a parasitic wasp: R scripts and Telenomus podisi data

Jacques Brodeur, Valeria Bertoldi, Gabriele Rondoni, Eric Conti & Ezio Peri
Animals have evolved the capacity to learn, and the conventional view is that learning allows individuals to improve foraging decisions. We describe a first case of maladaptive learning where a parasitoid learns to associate chemical cues from an unsuitable host, thereby re-enforcing a reproductive cul-de-sac (evolutionary trap). Telenomus podisi parasitizes eggs of the exotic stink bug Halyomorpha halys at the same rate as eggs of its coevolved host, Podisus maculiventris, but the parasitoid cannot complete...

Exploration of plastid phylogenomic conflict yields new insights into the deep relationships of Leguminosae

Rong Zhang, Yin-Huan Wang, Jian-Jun Jin, Gregory Stull, Anne Bruneau, Domingos Cardoso, Luciano De Queiroz, Michael Moore, Shu-Dong Zhang, Si-Yun Chen, Jian Wang, De-Zhu Li & Ting-Shuang Yi
Phylogenomic analyses have helped resolve many recalcitrant relationships in the angiosperm tree of life, yet phylogenetic resolution of the backbone of the Leguminosae, one of the largest and most economically and ecologically important families, remains poor due to generally limited molecular data and incomplete taxon sampling of previous studies. Here, we resolve many of the Leguminosae's thorniest nodes through comprehensive analysis of plastome-scale data using multiple modified coding and noncoding datasets of 187 species representing...

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: The origin of the legumes is a complex paleopolyploid phylogenomic tangle closely associated with the Cretaceous-Paleogene (K-Pg) mass extinction event

Erik Koenen, Dario Ojeda, Freek Bakker, Jan Wieringa, Catherine Kidner, Olivier Hardy, Toby Pennington, Patrick Herendeen, Anne Bruneau & Colin Hughes
The consequences of the Cretaceous-Paleogene (K-Pg) boundary (KPB) mass extinction for the evolution of plant diversity remain poorly understood, even though evolutionary turnover of plant lineages at the KPB is central to understanding assembly of the Cenozoic biota. The apparent concentration of whole genome duplication (WGD) events around the KPB may have played a role in survival and subsequent diversification of plant lineages. To gain new insights into the origins of Cenozoic biodiversity, we examine...

Maps of northern peatland extent, depth, carbon storage and nitrogen storage

Gustaf Hugelius, Julie Loisel, Sarah Chadburn, Robert B. Jackson, Miriam Jones, Glen MacDonald, Maija Marushchak, David Olefeldt, Maara Packalen, Matthias B. Siewert, Claire Treat, Merritt Turestsky, Carolina Voigt & Zicheng Yu
This dataset is grids of peatland extent, peat depth, peatland organic carbon storage, peatland total nitrogen storage and approximate extent of ombrotrophic/minerotrophic peatlands. The grids are geotiff files in 10 km pixel resolution projected in the World Azimuthal Equidistant projection. Note that the peat depth grid shows potential peat depth everywhere,also where there is no peatland cover. For files on peatland organic carbon, total nitrogen extent and extent of ombrotrophic/minerotrophic peatlands, there are separate files...

Data from: Monadelpha (Euphorbiaceae, Plukenetieae), a new genus of Tragiinae from the Amazon rainforest of Venezuela and Brazil

Lynn J. Gillespie, Warren M. Cardinal-McTeague & Kenneth J. Wurdack
Monadelpha L.J.Gillespie & Card.-McTeag., gen. nov., is described as a new member of Euphorbiaceae tribe Plukenetieae subtribe Tragiinae, to accommodate Tragia guayanensis, a species known from western Amazonas, Venezuela and, newly reported here, from Amazonas, Brazil. The genus is unique in the subtribe for having 5-colpate pollen and staminate flowers with filaments entirely connate into an elongate, cylindrical staminal column terminated by a tight cluster of anthers. Phylogenetic analyses based on nuclear rDNA ITS and...

Data from: Identification of intraductal carcinoma of the prostate on tissue specimens using Raman micro-spectroscopy: A diagnostic accuracy case-control study with multicohort validation

Andrée-Anne Grosset, Frédérick Dallaire, Tien Nguyen, Mirela Birlea, Jahg Wong, François Daoust, Noémi Roy, André Kougioumoutzakis, Feryel Azzi, Kelly Aubertin, Samuel Kadoury, Mathieu Latour, Roula Albadine, Susan Prendeville, Paul Boutros, Michael Fraser, Rob G. Bristow, Theodorus Van Der Kwast, Michèle Orain, Hervé Brisson, Nazim Benzerdjeb, Hélène Hovington, Alain Bergeron, Yves Fradet, Bernard Tête … & Dominique Trudel
Background Prostate cancer (PC) is the most frequently diagnosed cancer in North American men. Pathologists are in critical need of accurate biomarkers to characterize PC, particularly to confirm the presence of intraductal carcinoma of the prostate (IDC-P), an aggressive histopathological variant for which therapeutic options are now available. Our aim was to identify IDC-P with Raman micro-spectroscopy and machine learning technology following a protocol suitable for routine clinical histopathology laboratories. Methods and findings We used...

Filter feeding, deviations from bilateral symmetry, developmental noise and heterochrony of hemichordate and cephalochordate gills

Charles Larouche-Bilodeau, Xavier Guilbeault Mayer & Christopher Cameron
We measured gill slit fluctuating asymmetry (FA), a measure of developmental noise, in adults of three invertebrate deuterostomes with different feeding modes: the cephalochordate Branchiostoma floridae (an obligate filter feeder), and the enteropneusts Protoglossus graveolens (a facultative filter feeder / deposit feeder) and Saccoglossus bromophenolosus (a deposit feeder). FA was substantially and significantly low in B. floridae and P. graveolens, and high in S. bromophenolosus. Our results suggest that the gills of species that have...

Data from: A revised sectional classification of Plukenetia L. (Euphorbiaceae, Acalyphoideae) with four new species from South America

Warren M. Cardinal-McTeague & Lynn J. Gillespie
Abstract—We present a phylogenetic classification for Plukenetia (Euphorbiaceae, Acalyphoideae) based on morphology and molecular phylogenetic studies using nuclear (ETS, ITS, KEA1 introns 11 and 17, TEB exon 17) and plastid (matK, ndhF, psbA-trnH) DNA data. Plukenetia comprises 25 species divided into six sections, with three new sections and four new species described here. The circumscription of Plukenetia is unaltered from recent treatments and we continue to recognize Romanoa as distinct. The sections of Plukenetia correspond...

Recovery from infection is more likely to favor the evolution of migration than social escape from infection

Allison Shaw & Sandra Binning
1. Pathogen and parasite infections are increasingly recognized as powerful drivers of animal movement, including migration. Yet, infection-related migration benefits can result from a combination of environmental and/or social conditions, which can be difficult to disentangle. 2. Here, we focus on two infection-related mechanisms that can favor migration: moving to escape versus recover from infection. By directly comparing the evolution of migration in response to each mechanism, we can evaluate the likely importance of changing...

Data from: Paleolimnological assessment of wildfire-derived atmospheric deposition of trace metal(loid)s and major ions to subarctic lakes (Northwest Territories, Canada)

John Chételat, Nicolas Pelletier, Olivier Blarquez & Jesse Vermaire
Wildfires release terrestrial elements to the atmosphere as aerosols, and these events are becoming more frequent and intense in the Arctic boreal forest as the climate is warming. We quantified the impact of atmospheric deposition of aerosols from local wildfires on metal(loid) fluxes using macroscopic charcoal accumulation rates, historical fire mapping, and element concentrations in 210Pb‐dated lake sediment from five subarctic lakes with small catchments. Lake sediments showed small but significant increases in fluxes (median...

Data from: Molecular evolution of the proopiomelanocortin system in Barn owl species

Karin Löw, Anne-Lyse Ducrest, Luis San-Jose, Céline Simon, Vera Uva, Nabil Seidah, Antonella Pasquato, Stefan Kunz & Alexandre Roulin
Examination of genetic polymorphisms in outbred wild-living species provides insights into the evolution of complex systems. In higher vertebrates, the proopiomelanocortin (POMC) precursor gives rise to α-, β-, and γ-melanocyte-stimulating hormones (MSH), which are involved in numerous physiological aspects. Genetic defects in POMC are linked to metabolic disorders in humans and animals. In the present study, we undertook an evolutionary genetics approach complemented with biochemistry to investigate the functional consequences of genetic polymorphisms in the...

Infection state can affect host migratory decisions

Naven Narayanan Venkatanarayanan, Allison K. Shaw & Sandra Ann Binning
Organisms across a wide range of taxa use migration as a strategy to avoid, reduce or recover from parasitic infection. Previous work has identified three different processes by which migration can help reduce infection risk and/or costs: migratory escape from infection, migratory culling of infected individuals, and migratory recovery from infection. However, most theoretical modelling of host migration in response to infection assumes that individuals have a single strategy during both infected and susceptible states,...

Registration Year

  • 2020

Resource Types

  • Dataset


  • University of Montreal
  • University of Minnesota
  • Canadian Museum of Nature
  • Carleton University
  • University of Quebec at Montreal
  • Centre Hospitalier Universitaire de Québec
  • Institute of Arctic and Alpine Research
  • National Museum of Natural History
  • Stanford University
  • University of Perugia