57 Works

Data from: Postural stability margins as a function of support surface slopes

Aviroop Dutt-Mazumder, Seymon M. Slobounov, John Henry Challis & Karl Maxim Newell
This investigation examined the effects of slope of the surface of support (35°, 30°, 20°, 10° Facing(Toe) Down, 0° Flat and 10°, 20°, 25° Facing (Toe) Up) and postural orientation on the margins of postural stability in quiet standing of young adults. The findings showed that the center of pressure—CoP (displacement, area and length) had least motion at the baseline (0° Flat) platform condition that progressively increased as a function of platform angle in both...

Data from: The contribution of marine aggregate-associated bacteria to the accumulation of pathogenic bacteria in oysters: an agent-based model

Andrew M. Kramer, J. Evan Ward, Fred C. Dobbs, Melissa L. Pierce & John M. Drake
Bivalves process large volumes of water, leading to their accumulation of bacteria, including potential human pathogens (e.g., vibrios). These bacteria are captured at low efficiencies when freely suspended in the water column, but they also attach to marine aggregates, which are captured with near 100% efficiency. For this reason, and because they are often enriched with heterotrophic bacteria, marine aggregates have been hypothesized to function as important transporters of bacteria into bivalves. The relative contribution...

Data from: MonotomidGen – A matrix-based interactive key to the New World genera of Monotomidae (Coleoptera, Cucujoidea)

Thomas C. McElrath, Olivia F. Boyd & Joseph V. McHugh
A matrix-based Lucid key is presented for the twelve genera of Monotomidae (Coleoptera: Cucujoidea) represented in the New World. A general overview is given for the features and technical specifications of an original interactive key for the identification of these genera. The list of terminal taxa included with the key provides a current summary of monotomid generic diversity for the Nearctic and Neotropical regions.

Data from: Diversity of seeds captured by interception exceeds diversity of seeds deposited in traps

Judy L. Stone, Ryan Malloy & Greg Murray
Seed dispersal, a key process in terrestrial landscapes, is increasingly important in the face of habitat fragmentation and global climate change. Seed dispersal is also notoriously difficult to characterize, especially in species rich and spatially complex tropical forests. We contrasted assemblages of biotically dispersed seeds collected from four sites using two methods: deposition into seed traps and interception by the capture of frugivorous birds. We also compared seed deposition and interception with local fruit production....

Data from: Does movement behaviour predict population densities? a test with 25 butterfly species

Cheryl B. Schultz, B. Guy Pe'er, Christine Damiani, Leone Brown & Elizabeth E. Crone
Diffusion, which approximates a correlated random walk, has been used by ecologists to describe movement, and forms the basis for many theoretical models. However, it is often criticized as too simple a model to describe animal movement in real populations. We test a key prediction of diffusion models, namely, that animals should be more abundant in land cover classes through which they move more slowly. This relationship between density and diffusion has rarely been tested...

Data from: Inbreeding depression and drift load in small populations at demographic disequilibrium

Rachel B. Spigler, Konstantinos Theodorou & Shu-Mei Chang
Inbreeding depression is a major driver of mating system evolution and has critical implications for population viability. Theoretical and empirical attention has been paid to predicting how inbreeding depression varies with population size. Lower inbreeding depression is predicted in small populations at equilibrium, primarily due to higher inbreeding rates facilitating purging and/or fixation of deleterious alleles (drift load), but predictions at demographic and genetic disequilibrium are less clear. In this study, we experimentally evaluate how...

Data from: RADcap: sequence capture of dual-digest RADseq libraries with identifiable duplicates and reduced missing data

Sandra L. Hoffberg, Troy J. Kieran, Julian M. Catchen, Alison Devault, Brant C. Faircloth, Rodney Mauricio & Travis C. Glenn
Molecular ecologists seek to genotype hundreds to thousands of loci from hundreds to thousands of individuals at minimal cost per sample. Current methods, such as restriction site associated DNA sequencing (RADseq) and sequence capture, are constrained by costs associated with inefficient use of sequencing data and sample preparation. Here, we introduce RADcap, an approach that combines the major benefits of RADseq (low cost with specific start positions) with those of sequence capture (repeatable sequencing of...

Data from: The evolution of adult light emission color in North American fireflies

David W. Hall, Sarah E. Sander, Jennifer C. Pallansch & Kathrin F. Stanger-Hall
Firefly species (Lampyridae) vary in the color of their adult bioluminescence. It has been hypothesized that color is selected to enhance detection by conspecifics. One mechanism to improve visibility of the signal is to increase contrast against ambient light. High contrast implies that fireflies active early in the evening will emit yellower luminescence to contrast against ambient light reflected from green vegetation, especially in habitats with high vegetation cover. Another mechanism to improve visibility is...

Data from: Invasion of novel habitats uncouples haplo-diplontic life cycles

Stacy A. Krueger-Hadfield, Nicole M. Kollars, James E. Byers, Thomas W. Greig, Mareike Hammann, David C. Murray, Courtney J. Murren, Allan E. Strand, Ryuta Terada, Florian Weinberger & Erik E. Sotka
Baker's Law predicts uniparental reproduction will facilitate colonization success in novel habitats. While evidence supports this prediction among colonizing plants and animals, few studies have investigated shifts in reproductive mode in haplo-diplontic species in which both prolonged haploid and diploid stages separate meiosis and fertilization in time and space. Due to this separation, asexual reproduction can yield the dominance of one of the ploidy stages in colonizing populations. We tested for shifts in ploidy and...

Data from: Likelihood-based parameter estimation for high-dimensional phylogenetic comparative models: overcoming the limitations of 'distance-based' methods

Eric W. Goolsby
Recently, a suite of distance-based multivariate phylogenetic comparative methods has been proposed for studying the evolution of high-dimensional traits, such as morphometric coordinates, gene expression data, and function-valued traits. These methods allow for the statistical comparison of evolutionary rates, assessment of phylogenetic signal, and tests of correlated high-dimensional trait evolution. Simulations reveal that distance-based comparative methods exhibit low statistical power and high Type I error under various evolutionary scenarios. Distance-based methods are also limited to...

Data from: Malaria transmission potential could be reduced with current and future climate change

Courtney C. Murdock, Eleanore D. Sternberg & Matthew B. Thomas
Several studies suggest the potential for climate change to increase malaria incidence in cooler, marginal transmission environments. However, the effect of increasing temperature in warmer regions where conditions currently support endemic transmission has received less attention. We investigate how increases in temperature from optimal conditions (27 °C to 30 °C and 33 °C) interact with realistic diurnal temperature ranges (DTR: ± 0 °C, 3 °C, and 4.5 °C) to affect the ability of key vector...

Data from: Experimental demonstration of an Allee effect in microbial populations

RajReni B. Kaul, Andrew M. Kramer, Fred C. Dobbs & John M. Drake
Microbial populations can be dispersal limited. However, microorganisms that successfully disperse into physiologically ideal environments are not guaranteed to establish. This observation contradicts the Baas-Becking tenet: ‘Everything is everywhere, but the environment selects’. Allee effects, which manifest in the relationship between initial population density and probability of establishment, could explain this observation. Here, we experimentally demonstrate that small populations of Vibrio fischeri are subject to an intrinsic demographic Allee effect. Populations subjected to predation by...

Data from: Within guild co-infections influence parasite community membership: a longitudinal study in African Buffalo

Brian Henrichs, Marinda C. Oosthuizen, Milana Troskie, Erin Gorsich, Carmen Gondhalekar, Brianna Beechler, Vanessa O. Ezenwa, Anna E. Jolles & Brianna R. Beechler
1. Experimental studies in laboratory settings have demonstrated a critical role of parasite interactions in shaping parasite communities. The sum of these interactions can produce diverse effects on individual hosts as well as influence disease emergence and persistence at the population level. 2. A predictive framework for the effects of parasite interactions in the wild remains elusive, largely because of limited longitudinal or experimental data on parasite communities of free-ranging hosts. 3. This four year...

Data from: The role of neuropeptide F in a transition to parental care

Christopher B. Cunningham, Kathryn VanDenHeuvel, Daven B. Khana, Elizabeth C. McKinney & Allen J. Moore
The genetics of complex social behaviour can be dissected by examining the genetic influences of component pathways, which can be predicted based on expected evolutionary precursors. Here, we examine how gene expression in a pathway that influences the motivation to eat is altered during parental care that involves direct feeding of larvae. We examine the expression of neuropeptide F, and its receptor, in the burying beetle Nicrophorus vespilloides, which feeds pre-digested carrion to its begging...

Data from: Genetic by environmental variation but no local adaptation in oysters (Crassostrea virginica)

A. Randall Hughes, Torrance C. Hanley, James E. Byers, Jonathan H. Grabowski, Jennafer C. Malek, Micahel F. Piehler, David L. Kimbro & Michael F. Piehler
Functional trait variation within and across populations can strongly influence population, community, and ecosystem processes, but the relative contributions of genetic vs. environmental factors to this variation are often not clear, potentially complicating conservation and restoration efforts. For example, local adaptation, a particular type of genetic by environmental (G*E) interaction in which the fitness of a population in its own habitat is greater than in other habitats, is often invoked in management practices, even in...

Data from: A cross-continental comparison of plant and beetle responses to retention of forest patches during timber harvest

Susan C. Baker, Charles B. Halpern, Timothy J. Wardlaw, Christel Kern, Graham J. Edgar, Russell J. Thomson, Richard E. Bigley, Jerry F. Franklin, Kamal J.K. Gandhi, Lena Gustafsson, Samuel Johnson, Brian J. Palik, Thomas A. Spies, E. Ashley Steel, Jan Weslien, Joachim Strengbom & Kamal J. K. Gandhi
Timber harvest can adversely affect forest biota. Recent research and application suggest that retention of mature forest elements (‘retention forestry’), including unharvested patches (or ‘aggregates’) within larger harvested units, can benefit biodiversity compared to clearcutting. However, it is unclear whether these benefits can be generalized among the diverse taxa and biomes in which retention forestry is practiced. Lack of comparability in methods for sampling and analysing responses to timber harvest and edge creation presents a...

Data from: Retrotransposon proliferation coincident with the evolution of dioecy in asparagus

Alex Harkess, Francesco Mercati, Loredana Abbate, Michael McKain, J. Chris Pires, Tea Sala, Francesco Sunseri, Agostino Falavigna & Jim Leebens-Mack
Current phylogenetic sampling reveals that dioecy and an XY sex chromosome pair evolved once or possibly twice in the genus Asparagus. Although there appear to be some lineage-specific polyploidization events, the base chromosome number of 2n=2x=20 is relatively conserved across the Asparagus genus. Regardless, dioecious species tend to have larger genomes than hermaphroditic species. Here we test whether this genome size expansion in dioecious species is related to a polyploidization and subsequent chromosome fusion or...

Data from: Genomic data detect corresponding signatures of population size change on an ecological time scale in two salamander species

Schyler O. Nunziata, Stacey L. Lance, David E. Scott, Emily M. Lemmon, David W. Weisrock & Emily Moriarty Lemmon
Understanding the demography of species over recent history (e.g., < 100 years) is critical in studies of ecology and evolution, but records of population history are rarely available. Surveying genetic variation is a potential alternative to census-based estimates of population size, and can yield insight into the demography of a population. However, to assess the performance of genetic methods it is important to compare their estimates of population history to known demography. Here, we leveraged...

Data from: Waiting time to infectious disease emergence

Christopher J. Dibble, Eamon B. O'Dea, Andrew W. Park & John M. Drake
Emerging diseases must make a transition from stuttering chains of transmission to sustained chains of transmission, but this critical transition need not coincide with the system becoming supercritical. That is, the introduction of infection to a supercritical system results in a significant fraction of the population becoming infected only with a certain probability. Understanding the waiting time to the first major outbreak of an emerging disease is then more complicated than determining when the system...

Data from: Disassembly of a tadpole community by a multi-host fungal pathogen with limited evidence of recovery

Graziella V. DiRenzo, Christian Che-Castaldo, Amanda Rugenski, Roberto Brenes, Matt R. Whiles, Catherine M. Pringle, Susan S. Kilham & Karen R. Lips
Emerging infectious diseases can cause host community disassembly, but the mechanisms driving the order of species declines and extirpations following a disease outbreak are unclear. We documented the community disassembly of a Neotropical tadpole community during a chytridiomycosis outbreak, triggered by the generalist fungal pathogen, Batrachochytrium dendrobatidis (Bd). Within the first 11 months of Bd arrival, tadpole density and occupancy rapidly declined. Rarity, in terms of tadpole occupancy and adult relative abundance, did not predict...

Data from: Range-wide phenotypic and genetic differentiation in wild sunflower

Edward V. McAssey, Jonathan Corbi & John M. Burke
Background: Divergent phenotypes and genotypes are key signals for identifying the targets of natural selection in locally adapted populations. Here, we used a combination of common garden phenotyping for a variety of growth, plant architecture, and seed traits, along with single-nucleotide polymorphism (SNP) genotyping to characterize range-wide patterns of diversity in 15 populations of wild sunflower (Helianthus annuus L.) sampled along a latitudinal gradient in central North America. We analyzed geographic patterns of phenotypic diversity,...

Data from: Timing of rapid diversification and convergent origins of active pollination within Agavoideae (Asparagaceae)

Michael R. McKain, Joel R. McNeal, P. Roxanne Kellar, Luis E. Eguiarte, J. Chris Pires, James Leebens-Mack & Jim Leebens-Mack
PREMISE OF THE STUDY: Yucca species are ideal candidates for the study of coevolution due to the obligate mutualism they form with yucca moth pollinators (genera Tegeticula and Parategeticula). Yuccas are not the only species to exhibit a mutualism with yucca moths; the genus Hesperoyucca is pollinated by the California yucca moth (Tegeticula maculata). Relationships among yuccas, Hesperoyucca, and other members of subfamily Agavoideae are necessary to understand the evolution of this unique pollination syndrome....

Data from: Spatial spread of the West Africa Ebola epidemic

Andrew M. Kramer, J. Tomlin Pulliam, Laura W. Alexander, Andrew W. Park, Pejman Rohani & John M. Drake
Controlling Ebola outbreaks and planning an effective response to future emerging diseases are enhanced by understanding the role of geography in transmission. Here we show how epidemic expansion may be predicted by evaluating the relative probability of alternative epidemic paths. We compared multiple candidate models to characterize the spatial network over which the 2013–2015 West Africa epidemic of Ebola virus spread and estimate the effects of geographical covariates on transmission during peak spread. The best...

Data from: Difference in parenting in two species of burying beetle, Nicrophorus orbicollis and Nicrophorus vespilloides

Kyle M. Benowitz, Elizabeth C. McKinney & Allen J. Moore
Burying beetles (Nicrophorus) are model parents among insects, with all studied species known to regurgitate flesh from vertebrate carcasses to their offspring. However, most studies focus on a very few species, yet the interpretation of the function and importance of care is typically generalized to all burying beetles. Here we characterize subtle variation within and between individuals and sexes, and how this variation differs between two species of burying beetle. We find that Nicrophorus orbicollis...

Data from: Chemical communication of queen supergene status in an ant

W. Trible & K. G. Ross
Traits of interest to evolutionary biologists often have complex genetic architectures, the nature of which can confound traditional experimental study at single levels of analysis. In the fire ant Solenopsis invicta, the presence of a Mendelian ‘supergene’ is both necessary and sufficient to induce a shift in a fundamental property of social organization, from single-queen (monogyne) to multiple-queen (polygyne) colonies. This selfish genetic element, termed the Social b (Sb) supergene, contains > 600 genes that...

Registration Year

  • 2016

Resource Types

  • Dataset


  • University of Georgia
  • Donald Danforth Plant Science Center
  • University of Michigan-Ann Arbor
  • University of Missouri
  • Oregon State University
  • University of North Carolina
  • University of Alberta
  • Australian National University
  • United States Department of Agriculture
  • University of Tasmania