6 Works

Data from: Predicting southern zigzag salamander (Plethodon ventralis) occupancy in a fragmented landscape

Todd Pierson, Bryce Wade & Benjamin Fitzpatrick
We used repeated sampling of random quadrats and occupancy models to evaluate how the local distribution of the Southern Zigzag Salamander (Plethodon ventralis) in an urban and suburban landscape is influenced by: 1) forest patch size; 2) dominant lithology; and 3) invasive groundcover.

Data from: Genetic data reveal fine-scale ecological segregation between larval plethodontid salamanders in replicate contact zones

Todd Pierson, Carlos Camp & Benjamin Fitzpatrick
Contact zones present unique opportunities to investigate ecological divergence, reproductive barriers, and gene flow between species. The two-lined salamander (Eurycea bislineata) species complex is a group of semiaquatic plethodontid salamanders with a reticulate evolutionary history that reflects the reorganization of river drainage basins. Although evidence for widespread, ancient introgression suggests an absence of reproductive isolating mechanisms in the early evolutionary history of the group, modern contact zones reveal a broader diversity of outcomes—with some putative...

Reversible plasticity in brain size, behavior, and physiology characterizes caste 2 transitions in a socially flexible ant (Harpegnathos saltator)

Clint Penick
Phenotypic plasticity allows organisms to respond to changing environments throughout their lifetime, but these changes are rarely reversible. Exceptions occur in relatively long-lived vertebrate species that exhibit seasonal plasticity in brain size, although similar changes have not been identified in short-lived species, such insects. Here we investigate brain plasticity in reproductive workers of the ant Harpegnathos saltator. Unlike most ant species, workers of H. saltator are capable of sexual reproduction, and they compete in a...

Beyond the Karman Gait: Knifefish swimming in periodic and irregular vortex streets

Víctor Manuel Ortega-Jiménez & Christopher P. Sanford
Neotropical freshwater fishes such as knifefishes are commonly faced with navigating intense and highly unsteady streams. However, our knowledge on locomotion in apteronotids comes from laminar flows, where the ribbon fin dominates over pectoral fins or body bending. Here, we studied the 3D kinematics and swimming control of seven black ghost knifefish (Apteronotus albifrons) moving in laminar flows (flow speed U&[infin] ~ 1 &[minus] 5 Bl/s) and in periodic vortex streets (U&[infin] ~ 2 &[minus]...

Pygmy rabbit landscape genomics in the southern Great Basin

Nathan Byer, Matthew Holding, Miranda Crowell, Todd Pierson, Thomas Dilts, Eveline Larrucea, Kevin Shoemaker & Marjorie Matocq
Local adaptation can occur when spatially separated populations are subjected to contrasting environmental conditions. Historically, understanding the genetic basis of adaptation has been difficult, but increased availability of genome-wide markers facilitates studies of local adaptation in non-model organisms of conservation concern. The pygmy rabbit (Brachylagus idahoensis) is an imperiled lagomorph that relies on sagebrush for forage and cover. This reliance has led to widespread population declines following reductions in the distribution of sagebrush, leading to...

Long-term measures of climate unpredictability shape the avian endocrine stress axis

Sarah Guindre-Parker & Dustin R. Rubenstein
The vertebrate glucocorticoid stress response is an important mechanism facilitating pleiotropic phenotypic adjustments for coping with environmental change and optimizing fitness. Although circulating glucocorticoid hormones are mediators of plasticity that individuals can adjust rapidly in response to environmental challenges, they are also shaped by ecological selection. It remains unclear, however, how environmental variation on different timescales influences glucocorticoids. Here, we use an intraspecific comparative approach to determine how variation in precipitation on different timescales (months,...

Registration Year

  • 2021

Resource Types

  • Dataset


  • Kennesaw State University
  • University of Tennessee at Knoxville
  • Columbia University
  • University of Michigan-Ann Arbor
  • University of Nevada Reno
  • Piedmont College