6 Works

Data from: Hybridization between two gartersnake species (Thamnophis) of conservation concern: A threat or an important natural interaction?

John S. Placyk, Benjamin M. Fitzpatrick, Gary S. Casper, Randall L. Small, R. Graham Reynolds, Daniel W. A. Noble, Ronald J. Brooks & Gordon M. Burghardt
Distinguishing between hybrid zones formed by secondary contact versus parapatric divergence-with-gene-flow is an important challenge for understanding the interplay of geographic isolation and local adaptation in the origin of species. Similarly, distinguishing between natural hybrid zones and those that formed as a consequence of recent human activities has important conservation implications. Recent work has demonstrated the existence of a narrow hybrid zone between the plains gartersnake (Thamnophis radix) and Butler’s gartersnake (T. butleri) in the...

Data from: Within-season synchrony of a masting conifer enhances seed escape

Devan W. Archibald, Andrew G. McAdam, Stan Boutin, Quinn E. Fletcher & Murray M. Humphries
Predator satiation resulting from interannual reproductive synchrony has been widely documented in masting plants, but how reproductive synchrony within a year influences seed escape is poorly understood. We evaluated whether the intra-annual reproductive synchrony of individual white spruce trees (Picea glauca) increased seed escape from their primary predispersal seed predator, North American red squirrels (Tamiasciurus hudsonicus). Trees with cones that matured synchronously relative to those of other trees within red squirrel territories were significantly more...

Data from: Speciation with gene flow and the genetics of habitat transitions

Melania E. Cristescu, Anna Constantin, Dan G. Bock, Carla E. Cáceres & Teresa J. Crease
Whether speciation can advance to completion in the face of initially high levels of gene flow is a very controversial topic in evolutionary biology. Extensive gene exchange is generally considered to homogenize populations and counteract divergence. Moreover, the role of introgressive hybridization in evolution remains largely unexplored in animals, particularly in freshwater zooplankton in which allopatric speciation is considered to be the norm. Our work investigates the genetic structure of two young ecological species: the...

Data from: Eating local: influences of habitat on the diet of little brown bats (Myotis lucifugus)

Elizabeth L Clare, Brittany R Barber, Bernard W Sweeney, Paul DN Hebert & M Brock Fenton
We employ molecular methods to profile the diet of the little brown bat, Myotis lucifugus, and describe spatial and temporal changes in diet over their maternity season. We identified 61 prey species of insects and 5 species of arachnid. The largest proportion of prey (∼32%) were identified as species of the mass-emerging Ephemeroptera (mayfly) genus Caenis. Bats roosting in agricultural settings had lower dietary richness than those occupying a roost located on a forest fragment...

Data from: Molecular detection of trophic links in a complex insect host-parasitoid food web

Jan Hrcek, Scott E Miller, Donald L J Quicke & M. Alex Smith
Previously, host-parasitoid links have been unveiled almost exclusively by time-intensive rearing, while molecular methods were used only in simple agricultural host-parasitoid systems in the form of species specific primers. Here we present a general method for molecular detection of these links applied to a complex caterpillar-parasitoid food web from tropical rainforest of Papua New Guinea. We DNA barcoded hosts, parasitoids and their tissue remnants and matched the sequences to our extensive library of local species....

Data from: Genetic and maternal effects on tail spine and body length in the invasive spiny water flea (Bythotrephes longimanus)

Andrea L. J. Miehls, Scott D. Peacor & Andrew G. McAdam
Interest in the evolution of invasive species has grown in recent years, yet few studies have investigated sources of variation in invasive species traits experiencing natural selection. The spiny water flea, Bythotrephes longimanus, is an invasive zooplankton in the Great Lakes that exhibits seasonal changes in tail spine and body length consistent with natural selection. Evolution of Bythotrephes traits, however, depends on the presence and magnitude of quantitative genetic variation, which could change within or...

Registration Year

  • 2011
    6

Resource Types

  • Dataset
    6

Affiliations

  • University of Guelph
    6
  • National Museum of Natural History
    1
  • University of Alberta
    1
  • University of Windsor
    1
  • McGill University
    1
  • University of Tennessee at Knoxville
    1
  • Stroud Water Research Center
    1
  • Western University
    1
  • University of Wisconsin-Milwaukee
    1
  • Imperial College London
    1