7 Works

Data from: The evolution of life cycle complexity in aphids: ecological optimization, or historical constraint?

Nate B. Hardy, Daniel A. Peterson & Carol D. Von Dohlen
For decades, biologists have debated why many parasites have obligate multi-host life cycles. Here, we use comparative phylogenetic analyses of aphids to evaluate the roles of ecological optimization and historical constraint in the evolution of life cycle complexity. If life cycle complexity is adaptive, it should be evolutionarily labile, i.e., change in response to selection. We provide evidence that this is true in some aphids (aphidines), but not others (non-aphidines) – groups that differ in...

Data from: Ectoparasites and fitness of female Columbian ground squirrels

Shirley Raveh, Peter Neuhaus & F. Stephen Dobson
Parasites play an important role in the evolution of host traits via natural selection, coevolution and sexually selected ornaments used in mate choice. These evolutionary scenarios assume fitness costs for hosts. To test this assumption, we conducted an ectoparasite removal experiment in free-living Columbian ground squirrels (Urocittelus columbianus) in four populations over three years. Adult females were randomly chosen to be either experimentally treated with anti-parasite treatments (spot-on solution and flea powder, N = 61)...

Data from: The effect of locomotion on the mobilization of minerals from the maternal skeleton

Wendy R. Hood & Michael Hobensack
Bone is a dynamic tissue from which minerals are deposited or withdrawn according to the body’s demand. During late pregnancy and lactation, female mammals mobilize mineral from bone to support the ossification of offspring skeleton(s). Conversely, in response to mechanical loading, minerals are deposited in bone enabling it to develop a stronger architecture. Despite their central importance to reproductive performance and skeletal integrity, the interactions between these potentially opposing forces remains poorly understood. It is...

Data from: Phylogenetic analysis reveals positive correlations between adaptations to diverse hosts in a group of pathogen-like herbivores

Daniel A. Peterson, Nate B. Hardy, Geoffrey E. Morse, Ian C. Stocks, Akiko Okusu & Benjamin B. Normark
A jack of all trades can be master of none – this intuitive idea underlies most theoretical models of host-use evolution in plant-feeding insects, yet empirical support for trade-offs in performance on distinct host plants is weak. Trade-offs may influence the long-term evolution of host use while being difficult to detect in extant populations, but host-use evolution may also be driven by adaptations for generalism. Here we used host-use data from insect collection records to...

Data from: Scale insect host ranges are broader in the tropics

Nate B. Hardy, Daniel A. Peterson & Benjamin B. Normark
The specificity of the interactions between plants and their consumers varies considerably. The evolutionary and ecological factors underlying this variation are unclear. Several potential explanatory factors vary with latitude, for example plant species richness and the intensity of herbivory. Here, we use comparative phylogenetic methods to test the effect of latitude on host range in scale insects. We find that, on average, scale insects that occur in lower latitudes are more polyphagous. This result is...

Data from: A new species of Peckoltia from the Upper Orinoco (Siluriformes: Loricariidae)

Jonathan Armbruster, Nathan Lujan, Jonathan W. Armbruster & Nathan K. Lujan
A new species of the suckermouth armored catfish genus Peckoltia is described from the lower Ventuari River, a tributary of the upper Orinoco River in Amazonas State, Venezuela. Specimens of this species were formerly included in the wide-ranging Amazonian species P. vittata, but a recent molecular phylogeny found Orinoco individuals to be distantly related to Amazon Basin individuals spanning the range of P. vittata syntypes. Detailed morphological examination confirmed distinctiveness of Orinoco specimens, and found...

Data from: Taxonomic revision of the tarantula genus Aphonopelma Pocock, 1901 (Araneae, Mygalomorphae, Theraphosidae) within the United States

Chris A. Hamilton, Brent E. Hendrixson & Jason E. Bond
This systematic study documents the taxonomy, diversity, and distribution of the tarantula spider genus Aphonopelma Pocock, 1901 within the United States. By employing phylogenomic, morphological, and geospatial data, we evaluated all 55 nominal species in the United States to examine the evolutionary history of Aphonopelma and the group’s taxonomy by implementing an integrative approach to species delimitation. Based on our analyses, we now recognize only 29 distinct species in the United States. We propose 33...

Registration Year

  • 2015

Resource Types

  • Dataset


  • Auburn University
  • University of Massachusetts Amherst
  • Utah State University
  • Royal Ontario Museum
  • University of Basel
  • University of San Diego
  • University of Calgary
  • Millsaps College
  • Florida Department of Agriculture and Consumer Services